CN103094869B - Electric transmission line current circulation intelligent ice melting device of five divided conductors - Google Patents

Abstract

An intelligent ice-melting device for the current circulation of five-split wire transmission lines, which judges whether there is icing by monitoring external environmental conditions, and the intelligent controller controls the opening and closing of the circuit breaker, and transfers the total current transmitted by the five-split wires to the On some of the sub-conductors, increase the current density of the sub-conductors to achieve the purpose of melting ice. The intelligent controller uses the load current measured by the power-taking sensor, the icing state measured by the icing parameter monitoring unit and the external environmental conditions to automatically calculate the required ice-melting time. The current is transferred to another part of the sub-conductor until the ice layer on the five sub-conductors completely melts and falls off, and then it will work normally again. In the working process of the present invention, the intelligent controller performs overall control, and the judgment standard of the intelligent controller is provided by the power transformer, the ice coating parameter monitoring unit and the external environmental conditions, which can realize the automatic melting of ice on the transmission line without manual intervention Deicing work.

Description

Five-split wire 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 five-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 there is ice on the field line, and needs the power dispatching department to cooperate with the adjustment of the line load. The degree of segmentation and real-time intelligent ice melting is required, and it is difficult for technicians to arrive at the scene to observe the ice situation and issue ice melting instructions for local ice-covered sections such as micro-climate and micro-meteorology.

Contents of the invention

The object of the present invention is to provide a current circulation intelligent ice-melting device applied to the five-split conductor transmission line, which automatically controls the opening and closing of the circuit breaker according to the measurement results of the environmental conditions and the icing state, and transmits the five-split conductor 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 purpose of the present invention is achieved through such a technical solution, which includes five current input terminals R, five 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 an insulating output plate equipped with current output terminals. The five 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. Five conductive rods are arranged on the shunt conductive plate, and the five conductive rods pass through the isolation plate and are connected to the reference voltage plate. There are five 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 insulating 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 sent to the intelligent controller.

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 five 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 insulating 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 insulating 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 judge whether icing phenomenon occurs, and the intelligent controller controls the opening and closing of the circuit breaker, and the load current transmitted by the five-split wire transmission line 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 part of the sub-conductors in turn until the ice layer on the surface of the five 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-wire of the five-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 five-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 five circuit breakers 10 is closed, and the initial state of five 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. 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 the 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 each sub-conductor of the five 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 five-split wire transmission line current circulation intelligent ice-melting device Ⅰ, sub-conductor II and sub-conductor III, make the current of the three sub-conductors increase and generate heat, and automatically calculate the ice-melting time according to the ice-covered state and the load current measured by the power-taking sensor, and melt the ice layer of the sub-conductor 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 IV and the sub-conductor V acts as "opening" so that the transmission current of the five-split conductor transmission line is transferred to the sub-conductor I and sub-conductor V. On II and sub-conductor III, sub-conductor I, sub-conductor II and sub-conductor III are heated and deiced, and the time for deicing is determined by intelligent controller 9 .

2) After the melting of the sub-conductor I, sub-conductor II and sub-conductor III, the current circulation ice melting device of the five-split conductor transmission line automatically transfers the transmission current of the transmission line intelligently to the sub-conductor IV and sub-conductor V, so that the current of the three sub-conductors increases , Heat generation, automatically calculate the ice-melting time according to the ice-covered state and the load current measured by the power-taking sensor, and melt the ice layer of the sub-conductor within the automatically calculated time. In step 1), if the sub-conductor I, sub-conductor II and sub-conductor III are completely thawed, the intelligent controller 9 sends an instruction to the actuator 12, and first makes the circuit breaker 10 connected to the sub-conductor IV and sub-conductor V act as “closed” , and then the circuit breaker 10 connected to the sub-conductor I, sub-conductor II and sub-conductor III operates to "break", then the transmission current of the five-split conductor transmission line is transferred to the sub-conductor IV and the sub-conductor V, so that the sub-conductor IV and the sub-conductor V generate heat, Melt ice, determine the ice-melt time by intelligent controller 9.

3) When all the ice layers of the 5 sub-conductors are completely thawed, the smart device returns to the conduction state of normal transmission current, waiting for the next icing process and starting the next icing process.

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 five-split wire transmission line current circulation intelligent ice-melting device I and sub-conductor II make the current of the two sub-conductors increase and generate heat, and automatically calculate the ice-melting time according to the ice-covered state and the load current measured by the power-taking sensor, and melt the ice layer of the sub-conductor within the automatically calculated time.

2) After the ice melting of the sub-conductor I and sub-conductor II is over, according to the built-in and external environmental parameters of the device, the ice-covered state and the measurement results of the load current measured by the power-taking sensor, the current circulation of the five-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 generates heat, 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.

3) After the melting of the ice layer of the sub-conductor III and sub-conductor IV, 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 five-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 I and sub-conductor V, 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.

4) When all the ice layers of the 5 sub-conductors are completely thawed, the smart device returns to the conduction state of normal transmission current, waiting for the next icing process and starting the next icing process.

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 five-split wire transmission line current circulation intelligent ice-melting device I and sub-conductor II make the current of the two sub-conductors increase and generate heat, and automatically calculate the ice-melting time according to the ice-covered state and the load current measured by the power-taking sensor, and melt the ice layer of the sub-conductor within the automatically calculated time.

2) After the ice melting of the sub-conductor I and sub-conductor II is over, according to the built-in and external environmental parameters of the device, the ice-covered state and the measurement results of the load current measured by the power-taking sensor, the current circulation of the five-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 III, sub-conductor IV and sub-conductor V, so that the current of the three 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-wire within the automatically calculated time.

3) When all the ice layers of the 5 sub-conductors are completely thawed, the smart device returns to the conduction state of normal transmission current, waiting for the next icing process and starting the next icing process.

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. five split conductor transmission line of electricity current cycle intelligence deicing devices, it is characterized in that: described device includes five current input terminal R, five current output terminal S and the current cycle intelligence deicing device main body be arranged between current input terminal and current output terminal, described current cycle intelligence deicing device main body includes the conductive plate that confluxes, shunting conductive plate, division board, reference voltage plate and the insulation output board being provided with current output terminal, five current input terminal R are fixed on and conflux on conductive plate, conflux between conductive plate with shunting conductive plate and be connected by the primary winding contact rod as electricity-getting mutual inductor, shunting conductive plate is provided with five conducting rods, five conducting rods are connected on reference voltage plate through division board, the breaker of five band by-pass switches is provided with between insulation output board and division board, arc-chutes one end of each breaker is all fixed with insulation output board and is connected to a corresponding current output terminal S, the arc-chutes other end of breaker is through reference voltage plate, and be connected with the executing agency of a breaker, shunting conductive plate is also provided with intelligent controller and built-in icing parameter monitoring unit, intelligent controller and built-in icing parameter monitoring unit are between division board and shunting conductive plate, intelligent controller is electrically connected with built-in icing parameter monitoring unit and executing agency respectively.

2. five split conductor transmission line of electricity current cycle intelligence deicing devices as claimed in claim 1, is characterized in that: described intelligent controller, executing agency and built-in icing parameter monitoring unit are powered by the electricity-getting mutual inductor being benchmark with reference voltage plate.

3. five split conductor transmission line of electricity current cycle intelligence deicing devices as claimed in claim 1, is characterized in that: described breaker and by-pass switch all arrange independently executing agency.

4. five split conductor transmission line of electricity current cycle intelligence deicing devices as claimed in claim 1, it is characterized in that: described device also includes external icing parameter monitoring unit, external icing parameter monitoring unit is used for monitoring of environmental parameter, conductor temperature, current in wire and wire icing loading condition, and the data monitored are sent to intelligent controller by communication.

5. five split conductor transmission line of electricity current cycle intelligence deicing devices as claimed in claim 1, it is characterized in that: described shunting conductive plate includes insulation daughter board and conduction daughter board, conduction daughter board is embedded in the center of insulation daughter board, conduction daughter board is provided with five for through the hole of conducting rod and one for installing the hole of electricity-getting mutual inductor.

6. five split conductor transmission line of electricity current cycle intelligence deicing devices as claimed in claim 1, is characterized in that: described device also includes two respectively successively through the insulating bar of the conductive plate that confluxes, shunting conductive plate, division board, reference voltage plate and insulation output board.

7. five split conductor transmission line of electricity current cycle intelligence deicing devices as claimed in claim 1, it is characterized in that: described device also includes insulation crust, the conductive plate that confluxes, shunting conductive plate, division board, reference voltage plate and insulation output board are installed in insulation crust.