CN103078286A - Current-circulating intelligent ice-melting device for hepta-bundled conductor power transmission line - Google Patents

Abstract

The invention relates to a current-circulating intelligent ice-melting device for a hepta-bundled conductor power transmission line. According to the current-circulating intelligent ice-melting device, whether an icing phenomenon appears is judged through monitoring external environment conditions, a circuit breaker is controlled to be switched on and off by using an intelligent controller, the total current transmitted by a hepta-bundled conductor is respectively transferred onto a part of sub-conductors, and therefore the purpose of ice melting by increasing the current density of the conductor is achieved. The intelligent controller is used for automatically calculating the required icing time by adopting the load current measured by an electricity-taking sensor, an icing state measured by an icing parameter monitoring unit and external conditions; and after a part of sub-conductors are subjected to ice melting, the intelligent controller is used for controlling the circuit breaker to transfer the current to the other part of sub-conditions till ice layers on seven sub-conductors are completely molten and fall off, and then the intelligent controller returns to a normal working state. When the current-circulating intelligent ice-melting device works, the intelligent controller is used for carrying out integral control, and the working judgment standard of the intelligent controller is provided by an electricity-taking mutual inductor, the icing parameter monitoring unit and the external environment, so that automatic ice-melting and ice-removing operation of the power transmission line can be achieved without manual intervention.

Description

Seven-split conductor transmission line current circulation intelligent ice-melting device

technical field

The invention relates to the technical field of voltage transmission, in particular to a high-voltage transmission line ice-melting device for seven-split conductors.

Background technique

In the environment of low temperature and high humidity in winter, high-voltage power transmission lines will be covered with icing. Severe icing will lead to major accidents such as the collapse of transmission line towers and broken wires that affect the safe and reliable operation of the power system, causing large-scale power outages in the power grid. Seriously affect industrial and agricultural production and people's lives, and cause huge economic losses.

Anti-icing, melting and deicing of high-voltage transmission lines have always been the focus of attention at home and abroad. The existing deicing and anti-icing technology for high-voltage transmission lines is still immature and cannot meet the requirements of large-area anti-icing and deicing. Although some deicing technologies can be applied in engineering, they need to be carried out under the guidance of external equipment or manual operation. A kind of anti-icing power transmission line of multiple wires disclosed in the Chinese invention patent publication specification with publication number CN101527442A, it is to add ice-melting switches at both ends of the power transmission line of multiple wires, and each wire is normally energized when it does not need to melt ice , When the ice needs to be melted after the ice is covered, the power supply is interrupted, and the manual operation switch is adopted to make one wire transmit current, and the other wires are disconnected, and the manual operation gradually melts the ice layer of each wire. This method needs to add switchgear and change the structure of the transmission line. The power supply must be interrupted during the ice melting process. There are safety hazards in ice melting and extremely inconvenient operation. The cost of ice melting is high. Different degrees of ice-coated line sections and real-time anti-icing are not feasible for the switch breaker wires used in ultra-high voltage lines, especially the anti-icing of UHV split wires cannot be satisfied; A multi-split transmission line automatic melting ice method and its special switch, which is to install special switches in the substations at both ends of the ice-covered transmission line, and then manually remote control to issue instructions to make the special switch move to realize the transfer of all currents of the transmission line to ice-melting The sub-conductor of the sub-conductor, the sub-conductor generates heat and melts ice. This invention patent needs to manually judge whether the on-site line is covered with ice, and needs the power dispatching department to cooperate with the adjustment of the line load. It is difficult for technicians in local ice-covered sections such as micro-climate and micro-meteorology to rush to the scene to observe the ice-covered situation and issue ice-melting instructions.

Contents of the invention

The object of the present invention is to provide a current circulation intelligent ice-melting device applied to the seven-split wire transmission line, which automatically controls the opening and closing of the circuit breaker according to the measurement results of the environmental conditions and the ice-covered state, and transmits the seven-split wire transmission line The load current is transferred to a single sub-wire respectively, and the current density of the sub-wire is increased to achieve the purpose of melting ice.

The object of the present invention is achieved through such a technical solution, which includes seven current input terminals R, seven current output terminals S and a current circulation intelligent ice-melting device main body arranged between the current input terminals and the current output terminals, The main body of the current circulation intelligent ice-melting device includes a confluence conductive plate, a shunt conductive plate, an isolation plate, a reference voltage plate, and a current output plate equipped with current output terminals. The seven current input terminals R are fixed on the confluence conductive plate, and the confluence conduction The plate and the shunt conductive plate are connected by a primary coil conductive rod as a power-taking transformer. Seven conductive rods are arranged on the shunt conductive plate, and the seven conductive rods pass through the isolation plate and are connected to the reference voltage plate. There are seven circuit breakers with bypass switches between the board and the isolation board. One end of the arc extinguishing chamber of each circuit breaker is fixed with the current output board and connected to a corresponding current output terminal S. The arc extinguishing chamber of the circuit breaker The other end passes through the reference voltage board and is connected to an actuator of a circuit breaker. An intelligent controller and a built-in ice coating parameter monitoring unit are also arranged on the shunt conductive plate. The intelligent controller and the built-in ice coating parameter monitoring unit are located on the isolation board Between the shunt conductive plate, the intelligent controller is electrically connected with the built-in ice coating parameter monitoring unit and the actuator respectively.

Further, the intelligent controller, the actuator and the built-in icing parameter monitoring unit are powered by a power-taking transformer based on the reference voltage board.

Further, both the circuit breaker and the bypass switch are provided with independent actuators.

Further, the device also includes an external icing parameter monitoring unit, which is used to monitor environmental parameters, conductor temperature, conductor current and conductor icing load status, and transmit the monitored data through wireless communication Send it to the intelligent controller in two ways: wired connection and wired connection.

Further, the shunt conductive plate includes an insulator plate and a conductive sub-plate, the conductive sub-plate is embedded in the center of the insulator plate, and the conductive sub-plate is provided with seven holes for passing through the conductive rod and one for installing and taking electricity. hole for the transformer.

Further, the device also includes two insulating rods which respectively pass through the busbar conductive plate, the shunt conductive plate, the isolation plate, the reference voltage plate and the current output plate in sequence.

Further, the device also includes an insulating shell, and the converging conductive plate, the shunting conductive plate, the isolation plate, the reference voltage plate and the current output plate are all installed in the insulating shell.

Owing to adopting above-mentioned technical scheme, the present invention has following advantage:

In the present invention, the external environmental conditions detected by the built-in and external icing parameter monitoring units can be used to judge whether icing phenomenon occurs, and the intelligent controller controls the opening and closing of the circuit breaker to transfer the load current Transfer to a part of the sub-conductor, increase the current density of the sub-conductor to achieve the purpose of ice melting, the intelligent controller automatically calculates the ice-melting time according to the load current measured by the power-taking sensor and the external environment parameters, after the part of the sub-conductor completes the ice melting, the control The circuit breaker transfers the current to another sub-conductor in turn until the ice layer on the surface of the seven sub-conductors melts and falls off, and then returns to normal working condition. In the working process of the present invention, it is controlled by the intelligent controller as a whole, and the judgment standard of the intelligent controller is provided by the power transformer and the ice-covered parameter monitoring unit in two ways, the built-in and the external, which can realize the transmission line without manual intervention Melting works.

Other advantages, objects and features of the present invention will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be obtained from It is taught in the practice of the present invention. The objects and other advantages of the invention will be realized and attained by the following description and claims.

Description of drawings

The accompanying drawings of the present invention are described as follows.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a work flow chart of the present invention;

Fig. 3 is the program control block diagram of intelligent controller;

Fig. 4 is a schematic diagram of the structure of the shunt conductive plate.

In the figure: 1. Convergence conductive plate; 2. Power transformer; 3. Shunt conductive plate; 4. Isolation plate; 5. Reference voltage plate; 6. Insulation output plate; 7. Conductive rod; Monitoring unit; 9. Intelligent controller; 10. Circuit breaker; 11. Bypass switch; 12. Executing agency; 13. Conductive electronic board; 14. Insulator board;

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 1, the current input terminal R concentrates the transmission current of each sub-conductor of the seven-split wire through the confluence conductive plate 1, and uses the power-taking transformer 2 to measure the total value of the transmission current of the seven-split wire transmission line, and passes through the shunt conductive plate 3 and The conductive rod 7 is transmitted to the reference voltage board 5, and the reference voltage board 5 is connected to one end of all circuit breakers 10 and parallel bypass switches 11, and the other ends of the circuit breakers 10 and bypass switches 11 are respectively connected to the insulated output board 6. Sub-wire current output terminal S, and each sub-wire is connected to a circuit breaker 10 and a parallel bypass switch 11, the initial state of seven circuit breakers 10 is closed, and the initial state of seven parallel bypass switches 11 is open state. The intelligent controller 9 issues an instruction whether to start melting ice according to the measurement results of the external ice coating parameter monitoring unit and the built-in ice coating parameter monitoring unit 8 and the built-in control program. The isolation board 4 is used to isolate and protect the actuator 12 from the intelligent controller 9 and the built-in ice coating parameter monitoring unit 8 . The reference voltage board 5 is the reference point of the power supply voltage of the power transformer, and the power transformer provides working power for the actuator 12, the built-in icing parameter monitoring unit 8 and the intelligent controller 9. Bypass switch 11 provides a current path in the event of circuit breaker 10 failure. The insulating rods 16 are respectively connected with the bus conductive plate 1 , the shunt conductive plate 3 , the isolation plate 4 , the reference voltage plate 5 and the insulating output plate 6 for mechanical fixing and installation positioning.

As shown in Figure 4, the shunt conductive plate 3 includes an insulator plate 14 and a conductive sub-plate 13, the conductive sub-plate 13 is embedded in the center of the insulator plate 3, and the conductive sub-plate 13 is provided with seven for passing through the conductive rod 7. hole, and a hole for installing the primary conductive rod of the power transformer 2 is set in its center.

If the intelligent controller 9 judges that it is not necessary to start melting ice, the intelligent controller 9 sends an instruction to the actuator 12, and the actuator determines that the circuit breaker 10 and the bypass switch 11 remain in the initial state, so that the sub-wires of the seven splits can transmit current normally run in the state.

When the intelligent controller 9 judges that ice melting needs to be started, by controlling the switch of the corresponding circuit breaker, the following ice melting methods can be implemented:

Melting method one

1) According to the measurement results of the built-in and external environmental parameters of the device, the icing state and the load current measured by the power-taking sensor, the transmission current of the transmission line is automatically transferred to the neutron wire by using the seven-split wire transmission line current circulation intelligent ice-melting device Ⅰ. On the sub-conductor II and sub-conductor III, the current of the three sub-conductors is increased and heated, and the ice-melting time is automatically calculated according to the ice-covered state and the load current measured by the power-taking sensor, and the ice of the sub-conductor is melted within the automatically calculated time layer. The intelligent controller 9 sends an instruction to the actuator 12, and then the actuator 12 determines that the circuit breaker 10 connected to the sub-conductor IV, sub-conductor V, sub-conductor VI, and sub-conductor VII acts to "break" to make the seven-split conductor transmission line transmission The current is transferred to the sub-conductor I, sub-conductor II, and sub-conductor III, so that the sub-conductor I, sub-conductor II, and sub-conductor III generate heat and melt ice, and the time for melting ice is determined by the intelligent controller 9 .

2) After the ice melting of the sub-conductor I, sub-conductor II and sub-conductor III ends, the seven-split conductor transmission line current circulation ice melting device automatically and intelligently transfers the transmission current of the transmission line to the sub-conductor IV, sub-conductor V, sub-conductor VI, sub-conductor Conductor VII increases the current of the four sub-conductors and generates heat, automatically calculates the ice-melting time according to the icing state and the load current measured by the power-taking sensor, and melts the ice layer of the sub-conductors within the automatically calculated time. In step 1), if sub-conductor I, sub-conductor II, and sub-conductor III are thawed, the intelligent controller 9 sends an instruction to the actuator 12, and firstly makes sub-conductor IV, sub-conductor V, sub-conductor VI, sub-conductor VII The connected circuit breaker 10 acts to "close", and then the circuit breaker 10 connected to the sub-conductor I, sub-conductor II, and sub-conductor III acts to "open and close", then the transmission current of the seven-split conductor transmission line is transferred to the sub-conductor IV, sub-conductor III On wire V, sub wire VI and sub wire VII, sub wire IV, sub wire V, sub wire VI and sub wire VII are heated and ice-melted, and the time for melting ice is determined by intelligent controller 9 .

3) When the ice layer of the 7 sub-conductors is completely melted, the smart device returns to the conduction state of the normal transmission current, waits for the next ice coating process and starts the next ice melting process, and achieves the purpose of cyclic deicing in this way.

Melting method two

1) According to the measurement results of the built-in and external environmental parameters of the device, the icing state and the load current measured by the power-taking sensor, the transmission current of the transmission line is automatically transferred to the neutron wire by using the seven-split wire transmission line current circulation intelligent ice-melting device On I and sub-conductor II, the current of the two sub-conductors is increased and heated, and the ice-melting time is automatically calculated according to the ice-covered state and the load current measured by the power-taking sensor, and the ice layer of the sub-conductor is melted within the automatically calculated time. The intelligent controller 9 sends an instruction to the actuator 12, and then the actuator 12 determines that the circuit breaker 10 connected to the sub-conductor III, sub-conductor IV, sub-conductor V, sub-conductor VI, and sub-conductor VII acts to "break" and split the seven The transmission current of the wire transmission line is transferred to the sub-conductor I and the sub-conductor II, so that the sub-conductor I and the sub-conductor II generate heat and melt ice, and the time for melting ice is determined by the intelligent controller 9

2) After the melting of the ice layer of sub-conductor Ⅰ and sub-conductor Ⅱ is completed, according to the measurement results of the built-in and external environmental parameters of the device, the ice-covered state and the load current measured by the power-taking sensor, the current circulation of the seven-split conductor transmission line is used to intelligently melt the ice The device automatically transfers the transmission current of the transmission line to its sub-conductor III and sub-conductor IV, so that the current of the two sub-conductors increases and heats up, and the ice-melting time is automatically calculated according to the icing state and the load current measured by the power-taking sensor. Melt the ice layer of the sub-conductor within the time. In step 1), if the sub-conductor I and sub-conductor II are completely thawed, the intelligent controller 9 sends an instruction to the actuator 12 to first make the circuit breaker 10 connected to the sub-conductor III and sub-conductor IV actuate to "close", and then the sub-conductor The circuit breaker 10 connected to the sub-conductor Ⅰ and the sub-conductor Ⅱ operates to "break", and the transmission current of the seven-split conductor transmission line is transferred to the sub-conductor Ⅲ and sub-conductor Ⅳ, so that the sub-conductor Ⅲ and sub-conductor Ⅳ heat up and melt ice, and the intelligent controller 9 Determine the melting time.

3) If the ice melting of the sub-conductor III and sub-conductor IV ends, according to the built-in and external environmental parameters of the device, the icing state and the measurement results of the load current measured by the power-taking sensor, use the seven-split conductor transmission line current cycle intelligent melting The ice device automatically transfers the transmission current of the transmission line to its sub-conductor V and sub-conductor VI, so that the current of the two sub-conductors increases and heats up, and the ice-melting time is automatically calculated according to the icing state and the load current measured by the power-taking sensor. Melt the ice layer of the sub-conductor within the calculated time. In step 2), if the sub-conductor III and sub-conductor IV are completely thawed, the intelligent controller 9 sends an instruction to the actuator 12 to first make the circuit breaker 10 connected to the sub-conductor V and sub-conductor VI actuate to "close", and then the sub-conductor The circuit breaker 10 connected to III and sub-conductor IV operates to "break", and the transmission current of the seven-split conductor transmission line is transferred to sub-conductor V and sub-conductor VI, so that sub-conductor V and sub-conductor VI heat up and melt ice, and the intelligent controller 9 Determine the melting time.

4) After the melting of the ice layer of sub-conductor Ⅴ and sub-conductor Ⅵ is over, according to the built-in and external environmental parameters of the device, the icing state and the measurement results of the load current measured by the power-taking sensor, the current circulation of the seven-split conductor transmission line is used to intelligently melt the ice The device automatically transfers the transmission current of the transmission line to the sub-conductor I and sub-conductor VII, so that the current of the two sub-conductors increases and heats up, and the ice-melting time is automatically calculated according to the icing state and the load current measured by the power-taking sensor. Melt the ice layer of the sub-conductor within the time. In step 3), if the sub-conductor V and sub-conductor VI are completely thawed, the intelligent controller 9 sends an instruction to the actuator 12 to first make the circuit breaker 10 connected to the sub-conductor I and sub-conductor VII actuate to "close", and then the sub-conductor The circuit breaker 10 connected to V and sub-conductor VI operates to "break", and the transmission current of the seven-split conductor transmission line is transferred to sub-conductor I and sub-conductor VII, so that sub-conductor I and sub-conductor VII heat up and melt ice, and the intelligent controller 9 Determine the melting time.

5) When the ice layer of the 7 sub-conductors is completely melted, the smart device returns to the conduction state of the normal transmission current, waits for the next ice coating process and starts the next ice melting process, and achieves the purpose of cyclic deicing in this way.

Melting method three

1) According to the measurement results of the built-in and external environmental parameters of the device, the icing state and the load current measured by the power-taking sensor, the transmission current of the transmission line is automatically transferred to the neutron wire by using the seven-split wire transmission line current circulation intelligent ice-melting device Ⅰ. On the sub-conductor II and sub-conductor III, the current of the three sub-conductors is increased and heated, and the ice-melting time is automatically calculated according to the ice-covered state and the load current measured by the power-taking sensor, and the ice of the sub-conductor is melted within the automatically calculated time layer. The intelligent controller 9 sends an instruction to the actuator 12, and then the actuator 12 determines that the circuit breaker 10 connected to the sub-conductor IV, sub-conductor V, sub-conductor VI, and sub-conductor VII acts to "break" to make the seven-split conductor transmission line transmission The current is transferred to sub-conductor I, sub-conductor II and sub-conductor III, so that sub-conductor I, sub-conductor II and sub-conductor III heat up and melt ice, and the time for melting ice is determined by the intelligent controller 9

2) After the melting of the ice layer of conductor I, sub-conductor II and sub-conductor III is completed, according to the measurement results of the built-in and external environmental parameters of the device, the ice-covered state and the load current measured by the power-taking sensor, the current circulation of the transmission line using the seven-split conductor The intelligent ice-melting device automatically transfers the transmission current of the transmission line to the sub-conductor IV, sub-conductor V and sub-conductor VI, so that the current of the three sub-conductors increases and generates heat, and the melting is automatically calculated according to the icing state and the load current measured by the power sensor. Ice time, to melt the ice layer of the sub-wire within the automatically calculated time. In step 1), the melting of wire I, sub-wire II and sub-wire III is completed, and the intelligent controller 9 sends an instruction to the actuator 12 to first make the circuit breaker 10 connected to sub-wire IV, sub-wire V and sub-wire VI act. Then, the circuit breaker 10 connected to the conductor I, sub-conductor II and sub-conductor III acts as “opening”, then the transmission current of the seven-split conductor transmission line is transferred to the sub-conductor IV, sub-conductor V and sub-conductor VI, so that the sub-conductor IV, sub-conductor V and sub-conductor VI generate heat and melt ice, and the time for melting ice is determined by the intelligent controller 9 .

3) After the melting of the ice layer of the sub-conductor IV, sub-conductor V and sub-conductor VI is completed, according to the measurement results of the built-in and external environmental parameters of the device, the ice-covered state and the load current measured by the power-taking sensor, the transmission line current of the seven-split conductor is used to The circulating intelligent ice-melting device automatically transfers the transmission current of the transmission line to the sub-conductor I, sub-conductor II and sub-conductor VII, so that the current of the three sub-conductors increases and heats up, and is automatically calculated according to the icing state and the load current measured by the power-taking sensor Ice melting time, to melt the ice layer of the sub-conductor within the automatically calculated time. In step 2), if sub-conductor IV, sub-conductor V and sub-conductor VI are thawed, the intelligent controller 9 sends an instruction to the actuator 12, and firstly makes the circuit breaker 10 connected to sub-conductor I, sub-conductor II and sub-conductor VII The action "closes", and then the circuit breaker 10 connected to the sub-conductor IV, sub-conductor V and sub-conductor VI acts "opening", then the transmission current of the seven-split conductor transmission line is transferred to the sub-conductor I, sub-conductor II and sub-conductor VII, Make the sub-conductor I, sub-conductor II and sub-conductor VII generate heat and melt ice, and the time for melting ice is determined by the intelligent controller 9

4) When all the ice layers of the 7 sub-conductors are completely thawed, the smart device returns to the conduction state of the normal transmission current, waits for the next icing process and starts the next icing process, and achieves the purpose of cyclic deicing in this way

As shown in Figure 2, the external icing parameter monitoring unit monitors the environmental parameters, wire temperature, wire current and wire icing load in real time, and transmits the above parameters to the intelligent controller 9 in real time through wireless mode. The built-in icing parameter monitoring The unit 8 monitors the environmental parameters, conductor temperature, conductor current and conductor icing load status in real time, and transmits the above parameters to the intelligent controller 9 in real time through wired mode. The data provided by the parameter monitoring unit 8 and the power-taking transformer 2 send instructions to the actuator 12 to determine the working status of the circuit breaker 10 and the parallel bypass switch 11 according to the built-in control program.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should be included in the scope of the claims of the present invention.

Claims (7)

1. The seven-split wire transmission line current circulation intelligent ice-melting device is characterized in that: the device includes seven current input terminals R, seven current output terminals S, and a current that is arranged between the current input terminals and the current output terminals. The main body of the circulation intelligent ice-melting device, the main body of the current circulation intelligent ice-melting device includes a confluence conductive plate, a shunt conductive plate, an isolation plate, a reference voltage plate and a current output plate equipped with a current output terminal, and the seven current input terminals R are fixed on On the confluence conductive plate, the confluence conductive plate and the shunt conductive plate are connected by a primary coil conductive rod as a power transformer. Seven conductive rods are arranged on the shunt conductive plate, and the seven conductive rods pass through the isolation plate and are connected to the reference On the voltage board, seven circuit breakers with bypass switches are arranged between the current output board and the isolation board, and one end of the arc extinguishing chamber of each circuit breaker is fixed with the current output board and connected to a corresponding current output terminal S , the other end of the arc extinguishing chamber of the circuit breaker passes through the reference voltage board and is connected to an actuator of a circuit breaker. An intelligent controller and a built-in ice coating parameter monitoring unit are also arranged on the shunt conductive plate. The ice parameter monitoring unit is located between the isolation plate and the shunt conductive plate, and the intelligent controller is electrically connected to the built-in ice coating parameter monitoring unit and the actuator respectively. 2. The seven-split wire transmission line current circulation intelligent ice-melting device according to claim 1, characterized in that: the intelligent controller, the actuator and the built-in ice coating parameter monitoring unit are powered by a reference voltage plate as a reference Transformer power supply. 3. The current circulation intelligent ice-melting device for the seven-split conductor transmission line according to claim 1, characterized in that: the circuit breaker and the bypass switch are both provided with independent actuators. 4. The seven-split wire transmission line current circulation intelligent ice-melting device according to claim 1, characterized in that: said device also includes an external ice coating parameter monitoring unit, and the external ice coating parameter monitoring unit is used to monitor the environment parameters, conductor temperature, conductor current and conductor icing load status, and the monitored data are sent to the intelligent controller through wireless communication and wired connection. 5. The seven-split wire transmission line current circulation intelligent ice-melting device according to claim 1, characterized in that: the shunt conductive plate includes an insulator plate and a conductive sub-plate, and the conductive sub-plate is embedded in the center of the insulator plate, Seven holes for passing through the conductive rod and one hole for installing the power transformer are arranged on the conductive electronic board. 6. The seven-split wire transmission line current circulation intelligent ice-melting device according to claim 1, characterized in that: said device also includes two wires that respectively pass through the confluence conductive plate, the shunt conductive plate, the isolation plate, and the reference voltage Insulating rods for the board and the current output board. 7. The seven-split wire transmission line current circulation intelligent ice-melting device according to claim 1, characterized in that: the device also includes an insulating shell, a confluence conductive plate, a shunt conductive plate, an isolation plate, a reference voltage plate and a current Output boards are housed in insulating enclosures.

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