CN112582995B - Three-phase inconsistent protection device of circuit breaker - Google Patents
Three-phase inconsistent protection device of circuit breaker Download PDFInfo
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- CN112582995B CN112582995B CN202011514041.4A CN202011514041A CN112582995B CN 112582995 B CN112582995 B CN 112582995B CN 202011514041 A CN202011514041 A CN 202011514041A CN 112582995 B CN112582995 B CN 112582995B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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Abstract
The invention provides a three-phase inconsistent protection device of a circuit breaker, which comprises a circuit breaker failure and auxiliary protection device, an operation relay device and an external intermediate relay, wherein the operation relay device is connected with the auxiliary protection device; the breaker failure and auxiliary protection device comprises a protection device plug-in unit, wherein the protection device plug-in unit comprises a first charging protection action tripping assembly, a first overcurrent protection action tripping assembly, a first inconsistent protection action tripping assembly, a second charging protection action tripping assembly, a second overcurrent protection action tripping assembly and a second inconsistent protection action tripping assembly. According to the invention, the three-phase inconsistent protection, the charging protection and the overcurrent protection tripping outlet are separated by adding a protection device plug-in unit and additionally installing an external intermediate relay and related pressing plate loop wiring, so that the three-phase inconsistent protection outlet can trip, a failure loop is not started and reclosing is locked, and the three-phase inconsistent protection standard requirement of a power system is completely met.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a three-phase inconsistent protection device of a circuit breaker.
Background
In the power grid with the voltage level of 220kV and above, a phase-splitting operation breaker is generally adopted, and due to the reasons of equipment quality, operation and the like, abnormal states of inconsistent actions of the three-phase breaker can occur in operation, and due to zero sequence and negative sequence currents caused by inconsistent three phases, adverse effects can be caused on a system, and even protection and misoperation of an automatic device can be caused. In order to reduce the damage to the system caused by inconsistent three phases of the circuit breaker, the inconsistent three phases of the circuit breaker (non-full-phase protection) should be installed, and the circuit breaker with inconsistent three phases is taken out of operation, so that the normal operation of the system is ensured.
The existing three-phase inconsistent electric quantity protection of the 220KV circuit breaker consists of a breaker failure and auxiliary protection device, an operation relay device and a loop element. The three-phase inconsistent protection outlet and the charging protection and overcurrent protection of the device share a tripping outlet relay. Because the three-phase inconsistent electric quantity protection outlet of the circuit breaker shares a tripping outlet relay with the charging protection and the overcurrent protection, the three-phase inconsistent electric quantity protection starting failure loop expands the accident range, and the safe and stable operation of the power grid is endangered.
Disclosure of Invention
The invention aims to provide a three-phase inconsistent protection device of a circuit breaker so as to solve the technical problems, so that a three-phase inconsistent protection outlet can trip, a failure loop is not started, and reclosing is blocked, and the three-phase inconsistent protection standard requirement of a power system is completely met.
In order to solve the technical problems, the embodiment of the invention provides a three-phase inconsistent protection device of a circuit breaker, which comprises a circuit breaker failure and auxiliary protection device, an operation relay device and an external intermediate relay;
The breaker failure and auxiliary protection device comprises a protection device plug-in unit, wherein the protection device plug-in unit comprises a first charging protection action tripping component, a first overcurrent protection action tripping component, a first inconsistent protection action tripping component, a second charging protection action tripping component, a second overcurrent protection action tripping component and a second inconsistent protection action tripping component;
the input end of the first charging protection action tripping component is connected with the input end of the first overcurrent protection action tripping component in parallel and then connected to the anode of a first control power supply; the output end of the first charging protection action tripping assembly is connected with the first end of the first charging protection action tripping pressing plate, the output end of the first overcurrent protection action tripping assembly is connected with the first end of the first overcurrent protection action tripping pressing plate, the second end of the first charging protection action tripping pressing plate is connected with the second end of the first overcurrent protection action tripping pressing plate in parallel and then connected to the positive electrode of the first relay coil of the operation relay device, and the negative electrode of the first relay coil of the operation relay device is connected with the negative electrode of the first control power supply;
The input end of the first inconsistent protection action tripping assembly is connected with the positive electrode of the first control power supply, the output end of the first inconsistent protection action tripping assembly is connected with the first inconsistent protection action tripping pressing plate in series and then is connected to the positive electrode of the first relay coil of the external intermediate relay, and the negative electrode of the first relay coil of the external intermediate relay is connected with the negative electrode of the first control power supply;
The input end of the second charging protection action tripping component is connected with the input end of the second overcurrent protection action tripping component in parallel and then connected to the anode of a second control power supply; the output end of the second charging protection action tripping assembly is connected with the first end of the second charging protection action tripping pressing plate, the output end of the second overcurrent protection action tripping assembly is connected with the first end of the second overcurrent protection action tripping pressing plate, the second end of the second charging protection action tripping pressing plate is connected with the second end of the second overcurrent protection action tripping pressing plate in parallel and then connected to the positive electrode of the second relay coil of the operation relay device, and the negative electrode of the second relay coil of the operation relay device is connected with the negative electrode of the second control power supply;
The input end of the second inconsistent protection action tripping assembly is connected with the positive electrode of the second control power supply, the output end of the second inconsistent protection action tripping assembly is connected with the second inconsistent protection action tripping pressing plate in series and then connected to the positive electrode of the second relay coil of the external intermediate relay, and the negative electrode of the second relay coil of the external intermediate relay is connected with the negative electrode of the second control power supply.
As a preferred solution, the input end of the first charging protection action tripping assembly is connected in parallel with the input end of the first overcurrent protection action tripping assembly and then connected to the positive electrode of the first control power supply, specifically:
the input end of the first charging protection tripping assembly is connected with a first terminal of the breaker three-phase inconsistent protection device, the input end of the first overcurrent protection tripping assembly is connected with a second terminal of the breaker three-phase inconsistent protection device, and the first terminal and the second terminal are connected in parallel and then connected to the positive electrode of the first control power supply.
As a preferred solution, the input end of the first inconsistent protection tripping component is connected with the positive pole of the first control power supply, specifically:
The input end of the first inconsistent protection action tripping component is connected with a third terminal of the three-phase inconsistent protection device of the circuit breaker, and the third terminal is connected with the positive electrode of the first control power supply.
As a preferred solution, the input end of the second charging protection action tripping assembly is connected in parallel with the input end of the second overcurrent protection action tripping assembly and then connected to the positive electrode of the second control power supply, specifically:
The input end of the second charging protection tripping component is connected with a fourth terminal of the breaker three-phase inconsistent protection device, the input end of the second overcurrent protection tripping component is connected with a fifth terminal of the breaker three-phase inconsistent protection device, and the fourth terminal is connected with the fifth terminal in parallel and then connected to the positive electrode of the second control power supply.
As a preferred solution, the input end of the second inconsistent protection tripping component is connected with the positive pole of the second control power supply, specifically:
the input end of the second inconsistent protection action tripping component is connected with a sixth terminal of the three-phase inconsistent protection device of the circuit breaker, and the sixth terminal is connected with the positive electrode of the second control power supply.
As a preferred solution, the second end of the first charging protection action tripping pressing plate is connected in parallel with the second end of the first overcurrent protection action tripping pressing plate and then connected to the positive electrode of the first relay coil of the operation relay device, specifically:
The second end of the first charging protection action tripping pressing plate is connected with a seventh terminal of the breaker three-phase inconsistent protection device, the second end of the first overcurrent protection action tripping pressing plate is connected with an eighth terminal of the breaker three-phase inconsistent protection device, and the seventh terminal is connected with the eighth terminal in parallel and then connected to the positive electrode of the first relay coil of the operation relay device.
As a preferred scheme, the output end of the first inconsistent protection action tripping assembly is connected with the first inconsistent protection action tripping pressing plate in series and then connected to the positive electrode of the first relay coil of the external intermediate relay, specifically:
The output end of the first inconsistent protection action tripping assembly is connected with the first inconsistent protection action tripping pressing plate in series and then connected to a ninth terminal of the three-phase inconsistent protection device of the circuit breaker, and the ninth terminal is connected with the positive electrode of the first relay coil of the external intermediate relay.
As a preferred solution, the second end of the second charging protection action tripping pressing plate is connected in parallel with the second end of the second overcurrent protection action tripping pressing plate and then connected to the positive electrode of the second relay coil of the operation relay device, specifically:
the second end of the second charging protection tripping pressing plate is connected with a tenth terminal of the breaker three-phase inconsistent protection device, the second end of the second overcurrent protection tripping pressing plate is connected with an eleventh terminal of the breaker three-phase inconsistent protection device, and the tenth terminal is connected with the eleventh terminal in parallel and then connected to the positive electrode of a second relay coil of the operation relay device.
As a preferred scheme, the output end of the second inconsistent protection action tripping assembly is connected with the second inconsistent protection action tripping pressing plate in series and then connected to the positive electrode of the second relay coil of the external intermediate relay, specifically:
the output end of the second inconsistent protection action tripping assembly is connected with the second inconsistent protection action tripping pressing plate in series and then connected to the twelfth terminal of the three-phase inconsistent protection device of the circuit breaker, and the twelfth terminal is connected with the positive electrode of the second relay coil of the external intermediate relay.
Preferably, the first charging protection action tripping assembly, the first overcurrent protection action tripping assembly, the first inconsistent protection action tripping assembly, the second charging protection action tripping assembly, the second overcurrent protection action tripping assembly and the second inconsistent protection action tripping assembly are sequentially arranged on the protection device plug-in unit.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides a three-phase inconsistent protection device of a circuit breaker, which comprises a circuit breaker failure and auxiliary protection device, an operation relay device and an external intermediate relay, wherein the operation relay device is connected with the auxiliary protection device; the breaker failure and auxiliary protection device comprises a protection device plug-in unit, wherein the protection device plug-in unit comprises a first charging protection action tripping assembly, a first overcurrent protection action tripping assembly, a first inconsistent protection action tripping assembly, a second charging protection action tripping assembly, a second overcurrent protection action tripping assembly and a second inconsistent protection action tripping assembly. According to the invention, the three-phase inconsistent protection, the charging protection and the overcurrent protection tripping outlet are separated by adding a protection device plug-in unit and additionally installing an external intermediate relay and related pressing plate loop wiring, so that the three-phase inconsistent protection outlet can trip, a failure loop is not started and reclosing is locked, and the three-phase inconsistent protection standard requirement of a power system is completely met.
Drawings
Fig. 1 is a schematic structural diagram of a three-phase inconsistent protection device for a circuit breaker according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the technical problems in the background art, the embodiment of the invention separates three-phase inconsistent protection, charging protection and overcurrent protection tripping outlets by adding a protection plug-in, additionally installing an external intermediate relay and related clamp plate loop wiring. Therefore, the three-phase inconsistent protection outlet can trip, does not start a failure loop and locks and recloses, the three-phase inconsistent protection standard requirement of the power system is completely met, the RCS-923A protection device and the CZX-12R1 operation relay device do not need to be updated and replaced according to the prior art, and the material cost is greatly saved.
Referring to fig. 1, the embodiment of the invention provides a three-phase inconsistent protection device of a circuit breaker, which comprises a circuit breaker failure and auxiliary protection device (RCS-923A protection device), an operation relay device (CZX-12R 1 operation relay device) and an external intermediate relay;
The breaker failure and auxiliary protection device comprises a protection device plug-in (A# plug-in) which comprises a first charging protection action tripping component, a first overcurrent protection action tripping component, a first inconsistent protection action tripping component, a second charging protection action tripping component, a second overcurrent protection action tripping component and a second inconsistent protection action tripping component; in the embodiment of the present invention, as a preferred solution, the first charging protection action tripping assembly, the first overcurrent protection action tripping assembly, the first inconsistent protection action tripping assembly, the second charging protection action tripping assembly, the second overcurrent protection action tripping assembly, and the second inconsistent protection action tripping assembly are sequentially arranged on the protection device plug-in unit.
The input end (A17) of the first charging protection action tripping component is connected with a first terminal (8D 48) of the breaker three-phase inconsistent protection device, the input end (A01) of the first overcurrent protection action tripping component is connected with a second terminal (8D 49) of the breaker three-phase inconsistent protection device, and the first terminal (8D 48) is connected with the second terminal (8D 49) in parallel and then connected to the positive electrode of the first control power supply; an output end (a 18) of the first charging protection action tripping assembly is connected with a first end of a first charging protection action tripping pressing plate (8 LP 10), an output end (a 02) of the first overcurrent protection action tripping assembly is connected with a first end of a first overcurrent protection action tripping pressing plate (8 LP 11), a second end of the first charging protection action tripping pressing plate (8 LP 10) is connected with a seventh terminal (8D 56) of the breaker three-phase inconsistent protection device, a second end of the first overcurrent protection action tripping pressing plate (8 LP 11) is connected with an eighth terminal (8D 57) of the breaker three-phase inconsistent protection device, the seventh terminal (8D 56) is connected with the eighth terminal (8D 57) in parallel and then is connected to an anode of a first relay coil (1 TJR) of the operation relay device, and a cathode of the first relay coil (1 TJR) of the operation relay device is connected with a cathode of the first control power supply;
An input end (A13) of the first inconsistent protection action tripping assembly is connected with a third terminal (8D 50) of the three-phase inconsistent protection device of the circuit breaker, the third terminal (8D 50) is connected with a positive electrode of the first control power supply, an output end (A14) of the first inconsistent protection action tripping assembly is connected with a first inconsistent protection action tripping pressing plate (8 LP 12) in series and then is connected to a ninth terminal (8D 58) of the three-phase inconsistent protection device of the circuit breaker, the ninth terminal (8D 58) is connected with an positive electrode of a first relay coil (1 TJF) of the external intermediate relay, and a negative electrode of the first relay coil (1 TJF) of the external intermediate relay is connected with a negative electrode of the first control power supply;
An input end (A19) of the second charging protection tripping assembly is connected with a fourth terminal (8D 51) of the breaker three-phase inconsistent protection device, an input end (A03) of the second overcurrent protection tripping assembly is connected with a fifth terminal (8D 52) of the breaker three-phase inconsistent protection device, and the fourth terminal (8D 51) is connected with the fifth terminal (8D 52) in parallel and then connected to the positive electrode of the second control power supply; an output end (a 20) of the second charging protection action tripping assembly is connected with a first end of a second charging protection action tripping pressing plate (8 LP 13), an output end (a 04) of the second overcurrent protection action tripping assembly is connected with a first end of a second overcurrent protection action tripping pressing plate (8 LP 14), a second end of the second charging protection action tripping pressing plate (8 LP 13) is connected with a tenth terminal (8D 59) of the breaker three-phase inconsistent protection device, a second end of the second overcurrent protection action tripping pressing plate (8 LP 14) is connected with an eleventh terminal (8D 60) of the breaker three-phase inconsistent protection device, the tenth terminal (8D 59) is connected with the eleventh terminal (8D 60) in parallel and then is connected to an anode of a second relay coil (2 TJR) of the operation relay device, and a cathode of the second relay coil (2 TJR) of the operation relay device is connected with a cathode of the second control power supply;
the input end (A15) of the second inconsistent protection action tripping assembly is connected with a sixth terminal (8D 53) of the three-phase inconsistent protection device of the circuit breaker, the sixth terminal (8D 53) is connected with the positive electrode of the second control power supply, the output end (A16) of the second inconsistent protection action tripping assembly is connected with a second inconsistent protection action tripping pressing plate (8 LP 15) in series and then is connected to a twelfth terminal (8D 61) of the three-phase inconsistent protection device of the circuit breaker, the twelfth terminal (8D 61) is connected with the positive electrode of a second relay coil (2 TJF) of the external intermediate relay, and the negative electrode of the second relay coil (2 TJF) of the external intermediate relay is connected with the negative electrode of the second control power supply.
Based on the foregoing, in order to better understand the embodiments of the present invention, the following details are provided:
1. The RCS-923A device is added with an A# plug-in unit, the related handle seat and wiring of the A# plug-in unit are added, and the related wiring of 8LP10-15 is added, so that three-phase inconsistent protection, charging protection and overcurrent protection tripping outlets are separated. The three-phase inconsistent protection outlet starts a newly-installed external inconsistent tripping restarting relay 1TJF and 2TJF; the charging protection and overcurrent protection outlet enables the TJR relay of the original operation relay device to trip (start failure).
2. The external three-phase inconsistent tripping relay is added: and 1TJF and 2TJF are respectively started by a first outlet and a second outlet of the RCS-923A device with three-phase inconsistent protection, and the 1TJF and 2TJF start tripping loops do not start failure loops and lock reclosing.
Specific startup loops are shown in fig. 1: the control power supply is positively charged through an 8D50 terminal, namely an RCS-923A device A13 terminal, a three-phase inconsistent protection contact (BYZ 1), an 8LP12 inconsistent action tripping a pressing plate, namely an 8D58 terminal, an external intermediate relay 1TJF coil positive terminal starting 1TJF three-phase inconsistent protection outlet [ the control power supply is negatively connected with A1 TJF coil negative terminal ]; the control power supply II positive electrode is tripped through an 8D53 terminal, an RCS-923A device A15 terminal, a three-phase inconsistent two protection contact (BYZ 2), an 8LP15 inconsistent action, a two-pressure plate, an 8D61 terminal, an external intermediate relay 2TJF coil positive terminal, a 2TJF three-phase inconsistent protection two outlet is started, and the control power supply II negative electrode is connected with a 2TJF coil negative terminal.
In the figure, the terminal relationships of 8D48 and 8D 49: the short circuit parallel connection is an electrical connection point, which indicates that the charging protection action trips one, the overcurrent protection action trips one and the circuit shares one trip outlet circuit (OR gate logic) to start the 1TJR trip restarting relay. The connection mode and the working principle are as follows:
the positive electrode of the control power supply is charged through an 8D48 terminal, an RCS-923A device A17 terminal, a motion contact (CD 1), an 8LP10 charging protection motion tripping pressing plate, an 8D56 terminal, a CZX-12R1 operation relay device 1TJR relay coil positive electrode terminal starts A1 TJR outlet relay [ the control power supply is negatively connected with A1 TJR coil negative electrode terminal ];
The positive polarity terminal of the relay coil of the control power supply 1TJR starts a 1TJR outlet relay through an 8D49 terminal, the RCS-923A device A01 terminal, an action contact (GL 1), the 8LP11 overcurrent protection action trips a pressing plate, the 8D57 terminal, the CZX-12R1 operation relay device 1TJR outlet relay [ the negative polarity terminal of the control power supply is connected with the negative polarity terminal of the coil of 1TJR ];
In addition, 8D56 terminal to 8D57 terminal relationship: the short circuit parallel connection is an electrical connection point, which indicates that the charging protection action trips one, the overcurrent protection action trips one and the circuit shares one trip outlet circuit (OR gate logic) to start the 1TJR trip restarting relay.
The 8LP11 clamp is connected to the 8D56 via the 8D57, and then the 8LP10, 8LP11 trips by activating the CZX-12R1 device 1TJR relay, which activates the failure circuit [ via the 1TJR relay normally open contact activation ].
The following specific examples are listed to illustrate the working principle of the device provided by the scheme, and the improved example of the three-phase inconsistent electric quantity protection device of the circuit breaker of the 220KV bead-fish nail line in the Zhujiang power plant is as follows:
the RCS-923A device is added with an A# plug-in unit, a related handle seat and wiring of the A# plug-in unit are added, and a related wiring of an 8LP10-8LP15 protection tripping outlet pressing plate is added, so that three-phase inconsistent protection, charging protection and overcurrent protection tripping outlets are separated. The three-phase inconsistent protection outlet starts two newly-installed external inconsistent tripping reclosing relays 1TJF and 2TJF, so that the three-phase inconsistent protection outlet can trip, does not start a failure loop and locks reclosing; the charging protection and overcurrent protection outlet starts the TJR relay of the original CZX-12R1 operation relay device to trip (the contact point of the relay starts a failure loop, the outlet trips and the reclosing is locked). The three-phase inconsistent protection standard requirements of the power system are completely met, the RCS-923A protection device and the CZX-12R1 operation relay device do not need to be updated and replaced according to the prior art, and the material cost is greatly saved.
Compared with the prior art, the embodiment of the invention has the following advantages:
The three-phase inconsistent protection is separated from the charging protection and the overcurrent protection tripping outlet, so that the fault loop can not be started to expand accidents and reclose can be locked. Only one protector plug-in unit, two intermediate relays and simple wiring are needed, and the protector and the operation relay device are not needed to be replaced. If the RCS-923A protection device and the CZX-12R operation relay device are all updated and replaced according to the prior art, the material cost, the engineering construction amount and the labor cost of the device can be greatly saved if the technical scheme of the invention is popularized and applied.
The embodiment of the invention is characterized in that: the A# plug-in is added to the RCS-923A device, and the three-phase inconsistent protection, charging protection and overcurrent protection tripping outlet are separated by the related base, the pressing plate and the wiring. The three-phase inconsistent protection outlet starts a newly-installed external inconsistent tripping restarting relay DSP2-4A, and the TJF restarting relay starts a tripping loop and locks a reclosing failure loop. The charging protection and overcurrent protection outlet starts the TJR relay of the original operation relay device. The scheme of the invention can be realized without replacing the RCS-923A protection device and the CZX-12R operation relay device.
After the embodiment of the invention is improved, the three-phase inconsistent electric quantity protection can not start a failure loop to expand the accident range through the whole group transmission test and the medium adjustment acceptance of the RCS-923A protection device, and the new specification requirement of the three-phase inconsistent protection of the electric power system is completely met.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (8)
1. The three-phase inconsistent protection device of the circuit breaker is characterized by comprising a circuit breaker failure and auxiliary protection device, an operation relay device and an external intermediate relay;
The breaker failure and auxiliary protection device comprises a protection device plug-in unit, wherein the protection device plug-in unit comprises a first charging protection action tripping component, a first overcurrent protection action tripping component, a first inconsistent protection action tripping component, a second charging protection action tripping component, a second overcurrent protection action tripping component and a second inconsistent protection action tripping component;
the input end of the first charging protection action tripping component is connected with the input end of the first overcurrent protection action tripping component in parallel and then connected to the anode of a first control power supply; the output end of the first charging protection action tripping assembly is connected with the first end of the first charging protection action tripping pressing plate, the output end of the first overcurrent protection action tripping assembly is connected with the first end of the first overcurrent protection action tripping pressing plate, the second end of the first charging protection action tripping pressing plate is connected with the second end of the first overcurrent protection action tripping pressing plate in parallel and then connected to the positive electrode of the first relay coil of the operation relay device, and the negative electrode of the first relay coil of the operation relay device is connected with the negative electrode of the first control power supply;
The input end of the first inconsistent protection action tripping assembly is connected with the positive electrode of the first control power supply, the output end of the first inconsistent protection action tripping assembly is connected with the first inconsistent protection action tripping pressing plate in series and then is connected to the positive electrode of the first relay coil of the external intermediate relay, and the negative electrode of the first relay coil of the external intermediate relay is connected with the negative electrode of the first control power supply;
The input end of the second charging protection action tripping component is connected with the input end of the second overcurrent protection action tripping component in parallel and then connected to the anode of a second control power supply; the output end of the second charging protection action tripping assembly is connected with the first end of the second charging protection action tripping pressing plate, the output end of the second overcurrent protection action tripping assembly is connected with the first end of the second overcurrent protection action tripping pressing plate, the second end of the second charging protection action tripping pressing plate is connected with the second end of the second overcurrent protection action tripping pressing plate in parallel and then connected to the positive electrode of the second relay coil of the operation relay device, and the negative electrode of the second relay coil of the operation relay device is connected with the negative electrode of the second control power supply;
The input end of the second inconsistent protection action tripping assembly is connected with the positive electrode of the second control power supply, the output end of the second inconsistent protection action tripping assembly is connected with the second inconsistent protection action tripping pressing plate in series and then is connected to the positive electrode of the second relay coil of the external intermediate relay, and the negative electrode of the second relay coil of the external intermediate relay is connected with the negative electrode of the second control power supply;
The input end of the first charging protection action tripping component is connected with the input end of the first overcurrent protection action tripping component in parallel and then connected to the positive electrode of the first control power supply, and the charging protection action tripping component specifically comprises:
The input end of the first charging protection tripping component is connected with a first terminal of the breaker three-phase inconsistent protection device, the input end of the first overcurrent protection tripping component is connected with a second terminal of the breaker three-phase inconsistent protection device, and the first terminal and the second terminal are connected in parallel and then connected to the positive electrode of the first control power supply;
The input end of the first inconsistent protection action tripping component is connected with the positive electrode of the first control power supply, and specifically comprises:
The input end of the first inconsistent protection action tripping component is connected with a third terminal of the three-phase inconsistent protection device of the circuit breaker, and the third terminal is connected with the positive electrode of the first control power supply.
2. The three-phase inconsistent protection device of the circuit breaker according to claim 1, wherein the input end of the second charging protection action tripping assembly is connected in parallel with the input end of the second overcurrent protection action tripping assembly and then connected to the positive electrode of the second control power supply, specifically:
The input end of the second charging protection tripping component is connected with a fourth terminal of the breaker three-phase inconsistent protection device, the input end of the second overcurrent protection tripping component is connected with a fifth terminal of the breaker three-phase inconsistent protection device, and the fourth terminal is connected with the fifth terminal in parallel and then connected to the positive electrode of the second control power supply.
3. The three-phase inconsistent protection device for a circuit breaker according to claim 1, wherein the input end of the second inconsistent protection action tripping component is connected with the positive pole of the second control power supply, specifically:
the input end of the second inconsistent protection action tripping component is connected with a sixth terminal of the three-phase inconsistent protection device of the circuit breaker, and the sixth terminal is connected with the positive electrode of the second control power supply.
4. The three-phase inconsistent protection device of the circuit breaker according to claim 1, wherein the second end of the first charging protection action tripping pressing plate is connected in parallel with the second end of the first overcurrent protection action tripping pressing plate and then connected to the positive electrode of the first relay coil of the operation relay device, specifically:
The second end of the first charging protection action tripping pressing plate is connected with a seventh terminal of the breaker three-phase inconsistent protection device, the second end of the first overcurrent protection action tripping pressing plate is connected with an eighth terminal of the breaker three-phase inconsistent protection device, and the seventh terminal is connected with the eighth terminal in parallel and then connected to the positive electrode of the first relay coil of the operation relay device.
5. The three-phase inconsistent protection device for a circuit breaker according to claim 1, wherein the output end of the first inconsistent protection action tripping assembly is connected in series with the first inconsistent protection action tripping pressing plate and then connected to the positive electrode of the first relay coil of the external intermediate relay, specifically:
The output end of the first inconsistent protection action tripping assembly is connected with the first inconsistent protection action tripping pressing plate in series and then connected to a ninth terminal of the three-phase inconsistent protection device of the circuit breaker, and the ninth terminal is connected with the positive electrode of the first relay coil of the external intermediate relay.
6. The three-phase inconsistent protection device of the circuit breaker according to claim 1, wherein the second end of the second charging protection action tripping pressing plate is connected in parallel with the second end of the second overcurrent protection action tripping pressing plate and then connected to the positive electrode of the second relay coil of the operation relay device, specifically:
the second end of the second charging protection tripping pressing plate is connected with a tenth terminal of the breaker three-phase inconsistent protection device, the second end of the second overcurrent protection tripping pressing plate is connected with an eleventh terminal of the breaker three-phase inconsistent protection device, and the tenth terminal is connected with the eleventh terminal in parallel and then connected to the positive electrode of a second relay coil of the operation relay device.
7. The three-phase inconsistent protection device for a circuit breaker according to claim 1, wherein the output end of the second inconsistent protection action tripping assembly is connected in series with the second inconsistent protection action tripping pressing plate and then connected to the positive electrode of the second relay coil of the external intermediate relay, specifically:
the output end of the second inconsistent protection action tripping assembly is connected with the second inconsistent protection action tripping pressing plate in series and then connected to the twelfth terminal of the three-phase inconsistent protection device of the circuit breaker, and the twelfth terminal is connected with the positive electrode of the second relay coil of the external intermediate relay.
8. The circuit breaker three-phase inconsistent protection device of any of claims 1-7, wherein the first charging protection action trip assembly, the first overcurrent protection action trip assembly, the first inconsistent protection action trip assembly, the second charging protection action trip assembly, the second overcurrent protection action trip assembly, and the second inconsistent protection action trip assembly are disposed in a sequential arrangement on the protection device insert.
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| CN114146987B (en) * | 2021-11-30 | 2022-11-29 | 广州发展电力科技有限公司 | Wind driven generator rotor grounding processing method and system and computer equipment |
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| CN107634507A (en) * | 2017-10-17 | 2018-01-26 | 大唐韩城第二发电有限责任公司 | A kind of method and circuit of breaker unbalanced three-phase lines actuating breaker failure protection |
| CN207896642U (en) * | 2018-02-12 | 2018-09-21 | 山西崇光发电有限责任公司 | A kind of overcurrent relay protection trip circuit after station DC supply interruption |
| CN210273491U (en) * | 2019-07-09 | 2020-04-07 | 浙江南名电力科技有限公司 | Microcomputer protection measurement and control device |
| CN110880742A (en) * | 2019-12-13 | 2020-03-13 | 深圳供电局有限公司 | A high-voltage circuit breaker body three-phase inconsistent protection secondary circuit structure |
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