CN115755686B - A logical operation device and a method of using the same - Google Patents
A logical operation device and a method of using the same Download PDFInfo
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- CN115755686B CN115755686B CN202211399805.9A CN202211399805A CN115755686B CN 115755686 B CN115755686 B CN 115755686B CN 202211399805 A CN202211399805 A CN 202211399805A CN 115755686 B CN115755686 B CN 115755686B
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Abstract
The invention discloses a logic operation device and a use method thereof, wherein the logic operation device comprises a device shell, and a power interface, a change-over switch, a first interface, a second interface, a third interface and a fourth interface which are positioned on the device shell; the first interface is provided with a first contact pair for accessing a normally open contact of the first section bus isolating switch, the second interface is provided with a second contact pair for accessing a normally open contact of the second section bus isolating switch, the third interface is provided with a third contact pair and a fourth contact pair for accessing a normally open contact of the line side isolating switch, the third interface is provided with a fifth contact pair for accessing a normally open contact of the circuit breaker, and logic control lines are formed by connection between the contact pairs. According to the invention, the connection relation among the contact pairs, the change-over switch and the various controllers is used for forming the operation logic suitable for the inverted bus operation, and the operation is performed according to the formed operation logic when the inverted bus is inverted, so that the misoperation of the inverted bus can be reliably avoided, and the power work is safer.
Description
Technical Field
The invention relates to the technical field of switching operation of power systems, in particular to a logic operation device and a use method thereof.
Background
In the power system, as shown in fig. 1, a double bus connection mode is particularly common. According to the national power grid company power safety operation regulations, the power failure switching operation should be sequentially performed according to the sequence of a breaker (switch), a load side disconnecting switch (disconnecting switch) and a power supply side disconnecting switch (disconnecting switch). The inverse mother operation is an operation logic based on equipotential, and follows the operation logic of 'first-in-last-out'. The logic error of the inverted operation can cause serious accidents such as on-load disconnecting link and the like.
In order to prevent misoperation logic, the prior art scheme mainly carries out logic judgment according to the collected position state of equipment (isolating switch) by a microcomputer error prevention system to generate operation steps meeting the operation logic requirements. Meanwhile, a remote control locking relay and the like are arranged in the field terminal box, and the remote control locking relay is connected with the isolating switch control loop to realize locking.
However, this is done by software logic (called soft-latch) judgment, which will lose the anti-mislatch or be prone to cause misoperations when microcomputer anti-missystem fails, especially in emergency situations, when in-situ operations are required. Moreover, the remote control latching relay is also easy to be directly and manually short-circuited in a short-circuit wire mode, and errors are easy to occur under emergency conditions, so that misoperation is caused.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the logic operation device and the use method thereof can reliably avoid misoperation of the inverted bus, so that power work is safer.
In order to solve the technical problems, the invention adopts the following technical scheme:
a logic operation device comprises a device shell, a power interface, a change-over switch, a first interface, a second interface, a third interface and a fourth interface, wherein the power interface, the change-over switch, the first interface, the second interface, the third interface and the fourth interface are arranged on the device shell;
the first interface is provided with a first contact pair for accessing a normally open contact of the first section bus isolating switch, the second interface is provided with a second contact pair for accessing a normally open contact of the second section bus isolating switch, the third interface is provided with a third contact pair and a fourth contact pair for accessing a normally open contact of the line side isolating switch, and the fourth interface is provided with a fifth contact pair for accessing a normally open contact of the circuit breaker;
The common end of the change-over switch is connected with the power interface, a first wire end of the change-over switch is connected with one end of the fifth contact pair, the other end of the fifth contact pair is simultaneously connected with one end of the first contact pair and one end of the second contact pair, the other end of the first contact pair is connected with one end of the third contact pair, and the other end of the second contact pair is connected with one end of the fourth contact pair;
The other end of the third contact pair and the other end of the fourth contact pair are respectively used for connecting the first section bus isolating switch controller and the second section bus isolating switch controller.
In order to solve the technical problems, the invention adopts another technical scheme that:
the application method of the logic operation device is applied to the logic operation device and comprises the following steps of:
S1, correspondingly accessing a power supply, a normally open contact of a first section of bus isolating switch, a normally open contact of a second section of bus isolating switch, a normally open contact of a line side isolating switch and a normally open contact of a circuit breaker on a power supply interface, a first interface, a second interface, a third interface and a fourth interface;
S2, when the operation of reversing the operation of the first section bus into the operation of the second section bus is performed, controlling the change-over switch to the first wire end so that the second section bus isolating switch controller is electrified;
and S3, controlling the second section of bus isolating switch to be switched on, enabling the second contact pair to be switched on, and enabling the first section of bus isolating switch controller to be electrified, so that the inverted bus operation is completed.
The invention has the beneficial effects that: the logic operation device comprises a device shell, wherein an interface with a contact pair is arranged on the device shell and is respectively used for being connected with electronic components such as normally open contacts of a first section of bus isolating switch and the like on double buses of a power system, and operation logic suitable for inverted bus operation is formed through the contact pair, a change-over switch and the connection relation among various controllers.
Drawings
FIG. 1 is a double bus wiring diagram of a prior art power system;
FIG. 2 is a schematic diagram of a logic operation device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating internal wiring of a logic operation device according to an embodiment of the present invention;
FIG. 4 is a control principle equivalent wiring diagram of a logic operation device according to an embodiment of the present invention;
Fig. 5 is a schematic diagram illustrating steps of a method for using a logic operation device according to an embodiment of the present invention.
Description of the reference numerals:
1. A device body; 2. a protective cover; 3. a padlock;
DL, circuit breaker;
G1, a first section bus isolating switch; g2, a second section bus isolating switch; g3, a line side isolating switch;
j1, a first section bus isolating switch controller; j2, a second section bus isolating switch controller; j3, a line side isolating switch;
K1, a change-over switch;
m1, a first section of bus; m2, a second section bus;
p1, a first interface; p2, a second interface; p3, a third interface; p4, a fourth interface; p5, a power interface;
X1, a first contact pair; x2, a second contact pair; x3, third contact pairs; x4, a fourth contact pair; x5, fifth contact pairs; x6, a sixth contact pair; x7, seventh contact pair; x8, eighth contact pair; x9, a ninth contact pair; x10, tenth contact pair; x11, eleventh contact pair; x12, twelfth contact pair.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 2 and 3, a logic operation device includes a device housing 1, and a power interface P5, a switch K1, a first interface P1, a second interface P2, a third interface P3, and a fourth interface P4 on the device housing 1;
The first interface P1 is provided with a first contact pair X1 for being connected with a normally open contact of the first section bus isolating switch G1, the second interface P2 is provided with a second contact pair X2 for being connected with a normally open contact of the second section bus isolating switch G2, the third interface P3 is provided with a third contact pair X3 and a fourth contact pair X4 for being connected with a normally open contact of the line side isolating switch G3, and the fourth interface P4 is provided with a fifth contact pair X5 for being connected with a normally open contact of the circuit breaker DL;
the public end of the switch K1 is connected with the power interface P5, the first terminal of the switch K1 is connected with one end of the fifth contact pair X5, the other end of the fifth contact pair X5 is simultaneously connected with one end of the first contact pair X1 and one end of the second contact pair X2, the other end of the first contact pair X1 is connected with one end of the third contact pair X3, and the other end of the second contact pair X2 is connected with one end of the fourth contact pair X4;
The other end of the third contact pair X3 and the other end of the fourth contact pair X4 are respectively used for connecting the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2.
From the above description, the beneficial effects of the invention are as follows: the device casing 1 is provided with an interface with a contact pair, and the interface is respectively used for connecting electronic components such as a normally open contact of a first section bus isolating switch G1 on a double bus of a power system, and an operation logic suitable for inverted bus operation is formed through the connection relation among the contact pair, the change-over switch K1 and various controllers, and the operation is performed according to the formed operation logic when the inverted bus is inverted, so that misoperation of the inverted bus can be reliably avoided, and the power work is safer.
Further, the first interface P1 is further provided with a sixth contact pair X6 and a seventh contact pair X7 for connecting to a normally open contact and a normally closed contact of the first-stage busbar isolating switch G1, the second interface P2 is further provided with an eighth contact and a ninth contact pair X9 for connecting to a normally open contact and a normally closed contact of the second-stage busbar isolating switch G2, the third interface P3 is further provided with a tenth contact pair X10 and an eleventh contact pair X11 for connecting to a normally closed contact of the line-side isolating switch G3, and the fourth interface P4 is provided with a twelfth contact pair X12 for connecting to a normally closed contact of the circuit breaker DL;
The second cut-off terminal of the switch K1 is connected to one end of the twelfth contact pair X12, the other end of the twelfth contact pair X12 is simultaneously connected to one end of the seventh contact pair X7, one end of the ninth contact pair X9, one end of the tenth contact pair X10, and one end of the eleventh contact pair X11, the other end of the seventh contact pair X7 is connected to one end of the eighth contact pair X8, and the other end of the ninth contact pair X9 is connected to one end of the sixth contact pair X6;
The other end of the sixth contact pair X6 and the other end of the eighth contact pair X8 are both used for being connected with a line side isolating switch controller J3, and the other end of the tenth contact pair X10 and the other end of the eleventh contact pair X11 are respectively used for being connected with the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2.
According to the description, the out-of-service connection logic is formed by setting more contact pairs and connection relations, so that the out-of-service operation can obtain the expected effect only by operating according to the correct sequence, the situation of misoperation can be effectively prevented, the switching between the reverse bus and the out-of-service operation is performed through the change-over switch K1, and the use is flexible and convenient.
Further, the switch K1 further has a third tangential end, and the third tangential end is connected to the first section bus bar isolation switch controller J1, the second section bus bar isolation switch controller J2, and the line side isolation switch controller J3 at the same time.
As can be seen from the above description, the switch K1 further has a third cut-off terminal for simultaneously charging the first-stage bus bar disconnector controller J1, the second-stage bus bar disconnector controller J2 and the line-side disconnector controller J3, so that the bus bar operation control is completely separated from the logic limitation of the device, so as to perform the maintenance operation on the disconnector and the like.
Further, the device also comprises a protective cover 2 and a padlock 3;
the protective cover 2 is arranged on the device shell 1 and covers the change-over switch K1;
The padlock 3 is arranged on the protective cover 2.
As can be seen from the above description, the protective cover 2 and the padlock 3 are disposed on the switch K1 to ensure that the switch K1 will not be malfunction by others, and ensure the safety of the device.
Further, a first pin and a second pin are arranged in the first interface P1, and the length of the first pin is greater than that of the second pin;
The two first pins and the two second pins respectively form the first contact pair X1 and the seventh contact pair X7.
From the above description, the fool-proof design of the wiring is formed by arranging the first contact pin and the second contact pin with different lengths, so that the wiring is not easy to make mistakes, and the wiring efficiency is improved.
Referring to fig. 3 to 5, a method for using a logic operation device is applied to the logic operation device, and includes the following steps:
S1, a power supply, a normally open contact of a first section bus isolating switch G1, a normally open contact of a second section bus isolating switch G2, a normally open contact of a line side isolating switch G3 and a normally open contact of a circuit breaker DL are correspondingly connected to a power supply interface P5, a first interface P1, a second interface P2, a third interface P3 and a fourth interface P4;
S2, when the operation of reversing the operation of the first section bus M1 into the operation of the second section bus M2 is performed, controlling the change-over switch K1 to the first wire end, and enabling the second section bus isolating switch controller J2 to be electrified;
S3, controlling the second section bus isolating switch G2 to be switched on, enabling the second contact pair X2 to be switched on, enabling the first section bus isolating switch controller J1 to be electrified, and completing the inverted bus operation.
From the above description, the beneficial effects of the invention are as follows: the device casing 1 is provided with an interface with a contact pair, and the interface is respectively used for connecting electronic components such as a normally open contact of a first section bus isolating switch G1 on a double bus of a power system, and an operation logic suitable for inverted bus operation is formed through the connection relation among the contact pair, the change-over switch K1 and various controllers, and the operation is performed according to the formed operation logic when the inverted bus is inverted, so that misoperation of the inverted bus can be reliably avoided, and the power work is safer.
Further, the method also comprises the following steps:
S4, a normally-closed contact of a first section of bus isolating switch G1, a normally-closed contact of a second section of bus isolating switch G2, a normally-closed contact of a line side isolating switch G3 and a normally-closed contact of a breaker DL are correspondingly connected to the first interface P1, the second interface P2, the third interface P3 and the fourth interface P4;
s5, when the first section bus M1 is in operation and is in shutdown operation, controlling the change-over switch K1 to a second cut-off terminal, and opening a circuit breaker DL to enable a fifth contact pair X5 to be opened and a twelfth contact pair X12 to be closed, wherein the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2 are powered off, and a line side isolating switch controller J3 is powered on;
s6, the control circuit side isolating switch G3 is switched off, so that the tenth contact pair X10 and the eleventh contact pair X11 are closed, the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2 are electrified, and the out-of-service operation is completed.
According to the description, the out-of-service connection logic is formed by setting more contact pairs and connection relations, so that the out-of-service operation can obtain the expected effect only by operating according to the correct sequence, the situation of misoperation can be effectively prevented, the switching between the reverse bus and the out-of-service operation is performed through the change-over switch K1, and the use is flexible and convenient.
Further, the method further comprises the steps of:
And S7, when overhauling, controlling the change-over switch K1 to a third cut-off end, so that the first section bus isolating switch controller J1, the second section bus isolating switch controller J2 are powered off and the line side isolating switch controller J3 are electrified.
As can be seen from the above description, the switch K1 further has a third cut-off terminal for simultaneously charging the first-stage bus bar disconnector controller J1, the second-stage bus bar disconnector controller J2 and the line-side disconnector controller J3, so that the bus bar operation control is completely separated from the logic limitation of the device, so as to perform the maintenance operation on the disconnector and the like.
Further, before the step S2, the method further includes:
the padlock 3 is opened to open the protective cover 2.
As can be seen from the above description, the protective cover 2 and the padlock 3 are disposed on the switch K1 to ensure that the switch K1 will not be malfunction by others, and ensure the safety of the device.
Further, the step S1 specifically includes:
and according to the different lengths of the first contact pin and the second contact pin, the normally open contact and the normally closed contact of the first section bus isolating switch G1 are respectively connected to the first contact pair X1 and the seventh contact pair X7.
From the above description, the fool-proof design of the wiring is formed by arranging the first contact pin and the second contact pin with different lengths, so that the wiring is not easy to make mistakes, and the wiring efficiency is improved.
The logic operation device and the use method thereof can be applied to the scene of bus switching-on and switching-off operation, and the logic operation device and the use method thereof are described in the following specific embodiments:
referring to fig. 1 to 3, a first embodiment of the present invention is as follows:
A logic operation device, as shown in fig. 1 to 3, includes a device housing 1, and a power interface P5, a switch K1, a first interface P1, a second interface P2, a third interface P3, and a fourth interface P4 on the device housing 1; the first interface P1 is provided with a first contact pair X1 for being connected with a normally open contact of the first-stage bus isolating switch G1, the second interface P2 is provided with a second contact pair X2 for being connected with a normally open contact of the second-stage bus isolating switch G2, the third interface P3 is provided with a third contact pair X3 and a fourth contact pair X4 for being connected with a normally open contact of the line-side isolating switch G3, and the fourth interface P4 is provided with a fifth contact pair X5 for being connected with a normally open contact of the circuit breaker DL; the public end of the change-over switch K1 is connected with the power interface P5, the first wire end of the change-over switch K1 is connected with one end of a fifth contact pair X5, the other end of the fifth contact pair X5 is simultaneously connected with one end of a first contact pair X1 and one end of a second contact pair X2, the other end of the first contact pair X1 is connected with one end of a third contact pair X3, and the other end of the second contact pair X2 is connected with one end of a fourth contact pair X4; the other end of the third contact pair X3 and the other end of the fourth contact pair X4 are respectively used for connecting the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2.
In this embodiment, as shown in fig. 3, the above components constitute a logic loop of the inverse mother operation; the connection relationship between the first contact pair X1 and the second contact pair X2 is achieved through a connecting terminal and a connecting wire inside the device.
In this embodiment, as shown in fig. 2, the device further comprises a protecting cover 2 and a padlock 3; the protective cover 2 is arranged on the device shell 1 and covers the change-over switch K1; the padlock 3 is arranged on the protective cover 2 and can be opened only when the operation condition and the requirement are met, so that the protective cover 2 is opened for operation, and the double anti-misoperation effect is achieved; the cover 2 is preferably a glass cover, and when the padlock 3 is not opened, the glass cover can be broken and operated without confirming an incorrect operation manually.
Referring to fig. 1 to 3, a second embodiment of the present invention is as follows:
On the basis of the first embodiment, as shown in fig. 1 to 3, the first interface P1 is further provided with a sixth contact pair X6 and a seventh contact pair X7 for connecting the normally open contact and the normally closed contact of the first-stage busbar isolating switch G1, the second interface P2 is further provided with an eighth contact and a ninth contact pair X9 for connecting the normally open contact and the normally closed contact of the second-stage busbar isolating switch G2, the third interface P3 is further provided with a tenth contact pair X10 and an eleventh contact pair X11 for connecting the normally closed contact of the line-side isolating switch G3, and the fourth interface P4 is provided with a twelfth contact pair X12 for connecting the normally closed contact of the circuit breaker DL;
The second cut line end of the switch K1 is connected to one end of the twelfth contact pair X12, the other end of the twelfth contact pair X12 is connected to one end of the seventh contact pair X7, one end of the ninth contact pair X9, one end of the tenth contact pair X10, and one end of the eleventh contact pair X11, the other end of the seventh contact pair X7 is connected to one end of the eighth contact pair X8, and the other end of the ninth contact pair X9 is connected to one end of the sixth contact pair X6; the other end of the sixth contact pair X6 and the other end of the eighth contact pair X8 are both used for being connected with a line side isolating switch controller J3, and the other end of the tenth contact pair X10 and the other end of the eleventh contact pair X11 are respectively used for being connected with a first section bus isolating switch controller J1 and a second section bus isolating switch controller J2.
In this embodiment, as shown in FIG. 3, the components described above form a logic loop for the decommissioning operation. Furthermore, the change-over switch K1 has a third tangential end which is simultaneously connected to the first section bus bar disconnector controller J1, the second section bus bar disconnector controller J2 and the line side disconnector controller J3.
In this embodiment, as shown in fig. 2, a first pin and a second pin are disposed in the first interface P1, and the length of the first pin is greater than that of the second pin; the two first pins and the two second pins respectively form a first contact pair X1 and a seventh contact pair X7. In addition, the second, third and fourth interfaces P2, P3 and P4 are respectively provided with pin structures having different lengths. On the one hand, the long contact pin and the short contact pin have obvious function differences, so that the finding is convenient when the correct wiring and the wiring are wrong, and on the other hand, the long contact pin and the short contact pin form a trapezoid structure, are flexible to insert and pull, and are firmly installed. In this embodiment, the first interface P1 and the second interface P2 are both groove structures. In the first interface P1, the first pins are arranged near the center, while the second pins are located on both sides of the groove.
Referring to fig. 3 to 5, a third embodiment of the present invention is as follows:
The application method of the logic operation device is applied to a logic operation device of the first or second embodiment, as shown in fig. 5, and includes the following steps:
S1, a power supply, a normally open contact of a first section bus isolating switch G1, a normally open contact of a second section bus isolating switch G2, a normally open contact of a line side isolating switch G3 and a normally open contact of a circuit breaker DL are correspondingly connected to a power supply interface P5, a first interface P1, a second interface P2, a third interface P3 and a fourth interface P4;
S2, when the operation of reversing the operation of the first section bus M1 into the operation of the second section bus M2 is performed, controlling the change-over switch K1 to the first wire end, and enabling the second section bus isolating switch controller J2 to be electrified;
In this embodiment, as shown in fig. 3 and 4, when the line is operated by the first section bus, the first section bus isolating switch G1, the circuit breaker DL and the line side isolating switch G3 are in the closing position, and the second section bus isolating switch G2 is in the opening position, so that the normally open contact of the first section bus isolating switch G1 is closed; the normally open contact of the second section bus isolating switch G2 is disconnected; the normally open contact of the line side disconnecting switch G3 and the normally open contact of the circuit breaker DL are closed; i.e. the first contact pair X1 is closed; the second contact pair X2 is disconnected; the third contact pair X3, the fourth contact pair X4, and the fifth contact pair X5 are all closed.
Now, the line is operated by the second section bus M2 instead, and the operation is performed: the switching switch K1 is controlled to a first wire end, and as the first section bus isolating switch G1, the circuit breaker DL and the line side isolating switch G3 are in a switching-on position, the normally open contacts of the first section bus isolating switch G1 and the circuit breaker DL are closed, and a power supply passes through the fifth contact pair X5, the first contact pair X1 and the third contact pair X3 to the power supply end of the second section bus isolating switch controller J2, the second section bus isolating switch controller J2 is controlled to be electrified, and switching-on operation of the second section bus M2 can be carried out;
S3, controlling the second section bus isolating switch G2 to be switched on, enabling the second contact pair X2 to be switched on, enabling the first section bus isolating switch controller J1 to be electrified, and finishing the operation of inverting the bus.
In this embodiment, as shown in fig. 3 and fig. 4, after the second section bus isolation switch G2 is closed in place, the normally open contact is closed, that is, the second contact pair X2 is closed, and the power supply passes through the fifth contact pair X5, the second contact pair X2, and the fourth contact to the power supply end of the first section bus isolation switch controller J1, so that the first section bus isolation switch controller J1 is controlled to be electrified, and the first section bus opening operation can be performed. At this time, the inverse mother operation is completed; the second section bus M2 of the circuit runs, namely the second section bus isolating switch G2, the circuit breaker DL and the circuit side isolating switch G3 are at a closing position, and the first section bus isolating switch G1 is at a separating position.
Therefore, through the line logic limitation of the device, the inverted bus operation of the first section bus M1 operation is changed into the second section bus operation M2 operation, and the inverted bus operation can be finally completed only through the specific process, so that misoperation of operators is effectively avoided; similarly, when the operation of inverting the operation of the second bus segment M2 to the operation of the first bus segment is performed, the operation process is similar to the operation logic of the above process, and will not be repeated
In this embodiment, before step S2, the method further includes: opening the padlock 3 to turn over the protective cover 2; in an emergency situation where the padlock 3 is not opened, the operation can be performed by breaking the protective cover 2.
Referring to fig. 3 and 4, a fourth embodiment of the present invention is as follows:
a using method of a logic operation device is applied to a logic operation device of the second embodiment, and comprises the following steps:
S4, a normally-closed contact of the first-stage bus isolating switch G1, a normally-closed contact of the second-stage bus isolating switch G2, a normally-closed contact of the line-side isolating switch G3 and a normally-closed contact of the circuit breaker DL are correspondingly connected to the first interface P1, the second interface P2, the third interface P3 and the fourth interface P4;
S5, when the shutdown operation is carried out under the condition that the first section bus M1 runs, controlling a change-over switch K1 to a second cut-off terminal, and opening a circuit breaker DL, so that a fifth contact pair X5 is opened, a twelfth contact pair X12 is closed, both a first section bus isolating switch controller J1 and a second section bus isolating switch controller J2 are powered off, and a line side isolating switch controller J3 is electrified;
In this embodiment, the retirement operation: the specification of the power failure switching operation is carried out according to the national power grid company power safety operation regulations in sequence of a breaker DL (switch), a load side disconnecting switch (disconnecting switch) and a power supply side disconnecting switch (disconnecting switch).
In this embodiment, as shown in fig. 3 and fig. 4, under the condition that the first-stage bus M1 operates, the first-stage bus isolating switch G1, the circuit breaker DL and the line-side isolating switch G3 are in a closing position, and the second-stage bus isolating switch G2 is in a separating position, so that the normally closed contact of the first-stage bus isolating switch G1 is opened, and the normally open contact is closed; the normally closed contact of the second section bus isolating switch G2 is closed, and the normally open contact is closed; the normally closed contact of the line side disconnecting switch G3 and the normally closed contact of the circuit breaker DL are both opened, namely the sixth contact pair X6 is closed, and the seventh contact pair X7 is opened; the eighth contact pair X8 is open, the ninth contact pair X9 is closed, and the tenth contact pair X10, the eleventh contact pair X11, and the twelfth contact pair X12 are all open; at this time, the changeover switch K1 is controlled to the second cut-off terminal, and the circuit breaker DL is opened, so that the fifth contact pair X5 is opened, and the twelfth contact pair X12 is closed; the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2 are powered off, and switching-on and switching-off operations of the first section bus M1 or the second section bus M2 cannot be performed; the power supply is electrified from the twelfth contact pair X12, the sixth contact pair X6 and the ninth contact pair X9 to the power supply end of the line-side disconnecting switch controller J3, and the line-side disconnecting switch controller J3.
S6, the control circuit side isolating switch G3 is switched off, so that the tenth contact pair X10 and the eleventh contact pair X11 are closed, the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2 are electrified, and the shutdown operation is completed.
In the present embodiment, as shown in fig. 3 and 4, the control line side disconnecting switch G3 is opened, i.e., the normally closed contact of the line side disconnecting switch G3 is closed, so that the tenth contact pair X10 and the eleventh contact pair X11 are closed; at this time, the power supply not only passes through the twelve-point pair and the tenth-point pair X10 to the power supply end of the first-stage bus bar isolating switch controller J1, but also passes through the twelve-point pair and the eleventh-point pair X11 to the power supply end of the second-stage bus bar isolating switch controller J2, so that the opening and closing operation of the first-stage bus bar M1 or the second-stage bus bar M2 can be performed.
And S7, when overhauling, controlling the change-over switches K1 to the third cut-off end, so that the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2 are powered off and the line side isolating switch controller J3 is powered on.
In this embodiment, as shown in fig. 3 and fig. 4, a third switching end is disposed at the position of the switching switch K1, so that the first section bus isolating switch controller J1 and the second section bus isolating switch controller J2 can be powered off and the line side isolating switch controller J3 can be powered on at the same time; at this time, the opening and closing operation of the circuit is not controlled by the logic of the device, and can be performed at will so as to facilitate maintenance operation.
In summary, the device housing is provided with the interface with the contact pairs, which are respectively used for connecting the electronic components such as the normally open contacts of the first section bus isolating switch on the double buses of the power system, and the connection relationship among the contact pairs, the change-over switch and various controllers forms the operation logic suitable for the operation of switching the buses or stopping the operation, and the operation is performed according to the formed operation logic when the buses or stopping the operation, so that the misoperation of switching the buses or stopping the operation can be avoided, and meanwhile, the protection components such as the protection cover and the padlock are additionally arranged, so that double protection is realized, and the power operation is safer.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (6)
1. A logic operation device, which is characterized by comprising a device shell, and a power interface, a change-over switch, a first interface, a second interface, a third interface and a fourth interface which are positioned on the device shell;
the first interface is provided with a first contact pair for accessing a normally open contact of the first section bus isolating switch, the second interface is provided with a second contact pair for accessing a normally open contact of the second section bus isolating switch, the third interface is provided with a third contact pair and a fourth contact pair for accessing a normally open contact of the line side isolating switch, and the fourth interface is provided with a fifth contact pair for accessing a normally open contact of the circuit breaker;
The common end of the change-over switch is connected with the power interface, a first wire end of the change-over switch is connected with one end of the fifth contact pair, the other end of the fifth contact pair is simultaneously connected with one end of the first contact pair and one end of the second contact pair, the other end of the first contact pair is connected with one end of the third contact pair, and the other end of the second contact pair is connected with one end of the fourth contact pair;
The other end of the third contact pair and the other end of the fourth contact pair are respectively used for connecting a first section bus isolating switch controller and a second section bus isolating switch controller;
Further, the first interface is further provided with a sixth contact pair and a seventh contact pair for connecting a normally open contact and a normally closed contact of the first section bus isolating switch, the second interface is further provided with an eighth contact pair and a ninth contact pair for connecting a normally open contact and a normally closed contact of the second section bus isolating switch, the third interface is further provided with a tenth contact pair and an eleventh contact pair for connecting a normally closed contact of the line side isolating switch, and the fourth interface is provided with a twelfth contact pair for connecting a normally closed contact of the circuit breaker;
The second cut-off terminal of the change-over switch is connected with one end of the twelfth contact pair, the other end of the twelfth contact pair is connected with one end of the seventh contact pair, one end of the ninth contact pair, one end of the tenth contact pair and one end of the eleventh contact pair at the same time, the other end of the seventh contact pair is connected with one end of the eighth contact pair, and the other end of the ninth contact pair is connected with one end of the sixth contact pair;
The other end of the sixth contact pair and the other end of the eighth contact pair are both used for being connected with a line side isolating switch controller, and the other end of the tenth contact pair and the other end of the eleventh contact pair are respectively used for being connected with the first section bus isolating switch controller and the second section bus isolating switch controller;
further, the diverter switch is further provided with a third tangent line end, and the third tangent line end is simultaneously connected with the first section bus isolating switch controller, the second section bus isolating switch controller and the line side isolating switch controller.
2. The logic operation device according to claim 1, further comprising a guard cover and a padlock;
The protective cover is arranged on the device shell and covers the change-over switch;
The padlock is arranged on the protective cover.
3. The logic operation device according to claim 1, wherein a first pin and a second pin are provided in the first interface, and the length of the first pin is greater than the length of the second pin;
the two first pins and the two second pins respectively form the first contact pair and the seventh contact pair.
4. A method of using a logic operation device as claimed in any one of claims 1 to 3, comprising the steps of:
S1, correspondingly accessing a power supply, a normally open contact of a first section of bus isolating switch, a normally open contact of a second section of bus isolating switch, a normally open contact of a line side isolating switch and a normally open contact of a circuit breaker on a power supply interface, a first interface, a second interface, a third interface and a fourth interface;
S2, when the operation of reversing the operation of the first section bus into the operation of the second section bus is performed, controlling the change-over switch to the first wire end so that the second section bus isolating switch controller is electrified;
S3, controlling the second section bus isolating switch to be switched on, enabling the second contact pair to be switched on, enabling the first section bus isolating switch controller to be electrified, and completing the bus inversion operation;
The method also comprises the following steps:
S4, a normally-closed contact of the first section of bus isolating switch, a normally-closed contact of the second section of bus isolating switch, a normally-closed contact of the line side isolating switch and a normally-closed contact of the circuit breaker are correspondingly connected to the first interface, the second interface, the third interface and the fourth interface;
S5, when the operation of stopping and restarting the first section of bus is carried out, controlling the change-over switch to a second cut-off terminal, opening the circuit breaker, enabling a fifth contact pair to be opened, enabling a twelfth contact pair to be closed, enabling the first section of bus isolating switch controller and the second section of bus isolating switch controller to be powered off, and enabling a line side isolating switch controller to be powered on;
s6, controlling the circuit side isolating switch to be opened, so that a tenth contact pair and an eleventh contact pair are closed, and the first section bus isolating switch controller and the second section bus isolating switch controller are electrified to finish the shutdown operation;
The method also comprises the steps of:
and S7, controlling the change-over switch to a third cut-off end when overhauling, so that the first section bus isolating switch controller, the second section bus isolating switch controller are all powered off and the line side isolating switch controller is all electrified.
5. A method of using a logic operation device according to claim 4, the method is characterized by further comprising the following steps before the step S2:
the padlock is opened to open the protective cover.
6. A method of using a logic operation device according to claim 4, the method is characterized in that the step S1 specifically comprises the following steps:
And according to the different lengths of the first contact pin and the second contact pin, respectively connecting a normally open contact and a normally closed contact of the first section of bus isolating switch to the first contact pair and the seventh contact pair.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211399805.9A CN115755686B (en) | 2022-11-09 | 2022-11-09 | A logical operation device and a method of using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211399805.9A CN115755686B (en) | 2022-11-09 | 2022-11-09 | A logical operation device and a method of using the same |
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| CN115755686A CN115755686A (en) | 2023-03-07 |
| CN115755686B true CN115755686B (en) | 2024-10-01 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712017A (en) * | 2017-03-30 | 2017-05-24 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
| CN213637065U (en) * | 2020-09-10 | 2021-07-06 | 珠海电力设计院有限公司 | Circuit for preventing misoperation of bus voltage parallel circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3742375B2 (en) * | 2002-10-10 | 2006-02-01 | 東北電力株式会社 | Interlock device for switching busbar disconnectors in distribution substations. |
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- 2022-11-09 CN CN202211399805.9A patent/CN115755686B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712017A (en) * | 2017-03-30 | 2017-05-24 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
| CN213637065U (en) * | 2020-09-10 | 2021-07-06 | 珠海电力设计院有限公司 | Circuit for preventing misoperation of bus voltage parallel circuit |
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| CN115755686A (en) | 2023-03-07 |
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