CN102646994B - Automatic switching device for intelligent control of parallel operation of 220kV three-winding transformers - Google Patents

Automatic switching device for intelligent control of parallel operation of 220kV three-winding transformers Download PDF

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Publication number
CN102646994B
CN102646994B CN201210123463.8A CN201210123463A CN102646994B CN 102646994 B CN102646994 B CN 102646994B CN 201210123463 A CN201210123463 A CN 201210123463A CN 102646994 B CN102646994 B CN 102646994B
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China
Prior art keywords
circuit
relay
pressure
normally opened
opened contact
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CN201210123463.8A
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CN102646994A (en
Inventor
陈蕾
陈家斌
崔军朝
葛秦岭
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Zhumadian Power Supply Co of Henan Electric Power Co
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Zhumadian Power Supply Co of Henan Electric Power Co
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses an automatic switching device for intelligent control of parallel operation of 220kV three-winding transformers. A current detecting and converting circuit is serially connected to a high-voltage side of the first transformer, a signal output end of the current detecting and converting circuit is connected with a signal input end of a current judging and processing circuit, and a signal output end of the current judging and processing circuit is respectively connected with a transformer incoming switch-on circuit, a transformer outgoing switch-off circuit, a high-voltage-side neutral-point disconnecting switch switch-on circuit, a high-voltage-side neutral-point disconnecting switch switch-off circuit, a medium-voltage-side neutral-point disconnecting switch switch-on circuit and a medium-voltage-side neutral-point disconnecting switch switch-off circuit, wherein the transformer incoming switch-on circuit comprises a high-voltage-side incoming switch-on circuit, a low-voltage-side incoming switch-on circuit and a medium-voltage-side incoming switch-on circuit, and the transformer outgoing switch-off circuit comprises a high-voltage-side outgoing switch-off circuit, a low-voltage-side outgoing switch-off circuit and a medium-voltage-side outgoing switch-off circuit. The automatic switching device for intelligent control of parallel operation of the 220kV three-winding transformers can automatically complete incoming and outgoing of parallel operation of the transformers, so that operation loss of a power grid is reduced.

Description

Based Intelligent Control 220kV three-winding transformer parallel running automatic switching device
Technical field
The present invention relates to transformer switching device, relate in particular to the automatic switching device that is applied to the parallel running of electric power system 220kV three-winding transformer.
Background technology
At present, within throughout the year or one day 24 hours, all there is peak, low-valley interval in electric power system power load, people are in order to reduce the no-load loss of electric power system low-valley interval power transformer, generally to adopt two and the operation of above transformers connected in parallel, power load transformer peak period full capacity puts into operation, and power load low-valley interval transformer stops an operation.And transformers connected in parallel operation throwing, retreating operation all needs to operate according to the size of load by operator, namely load and go operation to drop into a transformer by operator on duty large time, the little time marquis that loads goes to operate by operator on duty and exits a transformer.But the time operating is like this longer, and operator on duty's labour intensity is large, and has unsafe misoperation factor.
Summary of the invention
The object of this invention is to provide a kind of Based Intelligent Control 220kV three-winding transformer parallel running automatic switching device, can reduce labour intensity, improve the security reliability of transformer operation.
The present invention adopts following technical proposals: a kind of Based Intelligent Control 220kV three-winding transformer parallel running automatic switching device, comprise current detecting translation circuit, electric current judges treatment circuit, transformer drops into combined floodgate circuit and transformer exits opening circuit, described current detecting translation circuit is used for being connected on the high-pressure side of first transformer, the signal output part of current detecting translation circuit judges that with electric current the signal input part for the treatment of circuit is connected, electric current judges the signal output part connection transformer input combined floodgate circuit respectively for the treatment of circuit, transformer exits opening circuit and high-pressure side neutral point isolating switch combined floodgate circuit and high-pressure side neutral point isolating switch opening circuit, medium voltage side neutral point isolating switch combined floodgate circuit and medium voltage side neutral point isolating switch opening circuit, transformer drops into combined floodgate circuit and is connected respectively the input combined floodgate breaker circuit of second transformer and exits separating brake breaker circuit with the signal output part that transformer exits opening circuit, high-pressure side neutral point isolating switch combined floodgate circuit and the signal output part of high-pressure side neutral point isolating switch opening circuit are connected respectively high-pressure side neutral point isolating switch combined floodgate breaker circuit and the high-pressure side neutral point isolating switch separating brake breaker circuit of second transformer, medium voltage side neutral point isolating switch combined floodgate circuit and the signal output part of medium voltage side neutral point isolating switch opening circuit are connected respectively medium voltage side neutral point isolating switch combined floodgate breaker circuit and the medium voltage side neutral point isolating switch separating brake breaker circuit of second transformer, wherein said transformer drops into combined floodgate circuit and comprises that combined floodgate circuit is dropped in high-pressure side, low-pressure side drops into combined floodgate circuit and medium voltage side drops into combined floodgate circuit, and described transformer exits opening circuit and comprises that opening circuit is exited in high-pressure side, low-pressure side exits opening circuit and medium voltage side exits opening circuit.
The input combined floodgate circuit of second described transformer is connected with centralized control center of transformer station or transformer station's background computer by telecommunication circuit with the alarm signal output ends that exits opening circuit.
Described current detecting translation circuit comprises current transformer, current transducer, the input of current transformer is connected on the high-pressure side of first transformer, the output of current transformer is connected with the input of current transducer, and the output of current transducer judges that with electric current the input for the treatment of circuit is connected.
Described electric current judges that treatment circuit comprises A/D change-over circuit, calculates decision circuitry, delay circuit, executive circuit, the output of A/D change-over circuit is connected with the input that calculates decision circuitry, and the output that calculates decision circuitry connects executive circuit by delay circuit.
Described executive circuit comprises high-pressure side input combined floodgate execution relay, low-pressure side drops into close a floodgate carries out relay, medium voltage side drops into close a floodgate carries out relay, high-pressure side is exited separating brake and is carried out relay, low-pressure side exits separating brake and carries out relay, medium voltage side exits separating brake and carries out relay, high-pressure side neutral point isolating switch closes a floodgate and carries out relay and high-pressure side neutral point isolating switch separating brake execution relay, medium voltage side neutral point isolating switch closes a floodgate and carries out relay and medium voltage side neutral point isolating switch separating brake execution relay.
Described high-pressure side neutral point isolating switch combined floodgate circuit comprises the first relay, the coil of the first relay accesses power supply after connecting with the normally opened contact of high-pressure side neutral point isolating switch combined floodgate execution relay, and the first normally opened contact of the first relay connects high-pressure side neutral point isolating switch combined floodgate breaker circuit; Described medium voltage side neutral point isolating switch combined floodgate circuit comprises the second relay, the coil of the second relay accesses power supply after connecting with the normally opened contact of medium voltage side neutral point isolating switch combined floodgate execution relay, and the first normally opened contact of the second relay connects medium voltage side neutral point isolating switch combined floodgate breaker circuit; Described high-pressure side is dropped into combined floodgate circuit and is comprised the 3rd relay, the second normally opened contact that close a floodgate normally opened contact, the second relay of carrying out relay are dropped in the coil of the 3rd relay and high-pressure side connect after access power supply, the first normally opened contact of the 3rd relay is connected in high voltage side of transformer input combined floodgate breaker circuit; Low-pressure side drops into combined floodgate circuit and comprises the 4th relay, the second normally opened contact of the coil of the 4th relay and the 3rd relay, low-pressure side drop into the normally opened contact of carrying out relay of closing a floodgate connect after access power supply, the first normally opened contact of the 4th relay is connected in step down side input combined floodgate breaker circuit; Medium voltage side drops into combined floodgate circuit and comprises the 5th relay, the second normally opened contact of the coil of the 5th relay and the 4th relay, medium voltage side drop into the normally opened contact of carrying out relay of closing a floodgate connect after access power supply, the first normally opened contact of the 5th relay is connected in transformer medium voltage side input combined floodgate breaker circuit; Described high-pressure side neutral point isolating switch opening circuit comprises the 6th relay, the second normally opened contact that the coil of the 6th relay and high-pressure side neutral point isolating switch separating brake are carried out normally opened contact, the 5th relay of relay connect after access power supply, the normally opened contact connection high-pressure side neutral point isolating switch separating brake breaker circuit of the 6th relay; Described medium voltage side neutral point isolating switch opening circuit comprises the 7th relay, the second normally opened contact that the coil of the 7th relay and medium voltage side neutral point isolating switch separating brake are carried out normally opened contact, the 6th relay of relay connect after access power supply, the normally opened contact connection medium voltage side neutral point isolating switch separating brake breaker circuit of the 7th relay.
Described medium voltage side exits opening circuit and comprises the 8th relay, the coil of the 8th relay and medium voltage side exit separating brake and carry out after the 3rd normally opened contact of the normally opened contact of relay, the second relay connect and access power supply, and the first normally opened contact of the 8th relay is connected on transformer medium voltage side and exits in separating brake breaker circuit; Low-pressure side exits opening circuit and comprises the 9th relay, the coil of the 9th relay and low-pressure side exit separating brake and carry out after the second normally opened contact of the normally opened contact of relay, the 8th relay connect and access power supply, and the first normally opened contact of the 9th relay is connected on step down side and exits in separating brake breaker circuit; Described high-pressure side is exited opening circuit and is comprised the tenth relay, the coil of the tenth relay is connected with the normally opened contact that separating brake execution relay is exited in the second normally opened contact, the high-pressure side of the 9th relay, the first normally opened contact of the tenth relay is connected on step down side and exits in separating brake breaker circuit, and the second normally opened contact of the tenth relay is in parallel with the second normally opened contact of the 5th relay.
The present invention has transformer load electric current is detected to arbitration functions automatically, can promptly and accurately adjust the economical operation of 220kV tri-winding distribution transformers, and the economical parallel running that automatically completes main transformer is thrown and moved back work, effectively reduces the running wastage of electrical network; Deducted operations staff's the heavy grid switching operation of complexity, prior one is to have improved security reliability simultaneously, has reduced misoperation.This apparatus structure is simple, is skillfully constructed, science reasonable in design, and cost is low, easy to use.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention;
Fig. 2 is the connecting circuit figure of current detecting translation circuit of the present invention and transformer;
Fig. 3 is high-pressure side of the present invention neutral point isolating switch combined floodgate circuit diagram;
Fig. 4 is medium voltage side neutral point isolating switch combined floodgate circuit diagram of the present invention;
Fig. 5 is that high voltage side of transformer of the present invention drops into combined floodgate circuit diagram;
Fig. 6 is that step down side of the present invention drops into combined floodgate circuit diagram;
Fig. 7 is that transformer medium voltage side of the present invention drops into combined floodgate circuit diagram;
Fig. 8 is high-pressure side neutral point isolating switch opening circuit figure of the present invention;
Fig. 9 is medium voltage side neutral point isolating switch opening circuit figure of the present invention;
Figure 10 is that transformer medium voltage side of the present invention exits opening circuit figure;
Figure 11 is that step down side of the present invention exits opening circuit figure;
Figure 12 is that high voltage side of transformer of the present invention exits opening circuit figure.
Embodiment
As Fig. 1, shown in Fig. 2, a kind of Based Intelligent Control 220kV of the present invention three-winding transformer parallel running automatic switching device, comprise current detecting translation circuit, electric current judges treatment circuit, transformer drops into combined floodgate circuit and transformer exits opening circuit, high-pressure side neutral point isolating switch combined floodgate circuit and high-pressure side neutral point isolating switch opening circuit, medium voltage side neutral point isolating switch combined floodgate circuit and medium voltage side neutral point isolating switch opening circuit, wherein transformer input combined floodgate circuit comprises high-pressure side input combined floodgate circuit, low-pressure side drops into combined floodgate circuit and medium voltage side drops into combined floodgate circuit, described transformer exits opening circuit and comprises that high-pressure side exits opening circuit, low-pressure side exits opening circuit and medium voltage side exits opening circuit.Described current detecting translation circuit comprises current transformer LH, current transducer KA, the input of current transformer LH is connected on the high-pressure side of first transformer T1, the LH output of current transformer is connected with the input of current transducer KA, and the output of current transducer KA judges that with electric current the input for the treatment of circuit is connected; Described electric current judges that treatment circuit comprises A/D change-over circuit, calculates decision circuitry, delay circuit, executive circuit, the output of A/D change-over circuit is connected with the input that calculates decision circuitry, calculating decision circuitry can realize with single-chip microcomputer, and the output that calculates decision circuitry connects executive circuit by delay circuit.Described executive circuit comprises that separating brake execution relay is exited in high-pressure side input combined floodgate execution relay, low-pressure side input combined floodgate execution relay, high-pressure side, low-pressure side exits separating brake execution relay, high-pressure side neutral point isolating switch combined floodgate execution relay and high-pressure side neutral point isolating switch separating brake execution relay, medium voltage side neutral point isolating switch combined floodgate execution relay and medium voltage side neutral point isolating switch separating brake execution relay.The signal output part of executive circuit respectively connection transformer drops into combined floodgate circuit and transformer and exits signal input part and high-pressure side neutral point isolating switch and the medium voltage side neutral point isolating switch of opening circuit, and transformer drops into combined floodgate circuit and is connected respectively the input combined floodgate breaker circuit of second transformer T2 and exits separating brake breaker circuit (G2, D2, X2 are respectively the motion end of high-pressure side circuit breaker, low-pressure side circuit breaker, medium voltage side circuit breaker) with the signal output part that transformer exits opening circuit; High-pressure side neutral point isolating switch combined floodgate circuit and the signal output part of high-pressure side neutral point isolating switch opening circuit are connected respectively high-pressure side neutral point isolating switch combined floodgate breaker circuit and the high-pressure side neutral point isolating switch separating brake breaker circuit (Z1 is the motion end of high-pressure side neutral point isolating switch) of second transformer; Medium voltage side neutral point isolating switch combined floodgate circuit and the signal output part of medium voltage side neutral point isolating switch opening circuit are connected respectively medium voltage side neutral point electrical switch disconnector circuit and the medium voltage side neutral point isolating switch separating brake breaker circuit (Z2 is the motion end of medium voltage side neutral point isolating switch) of second transformer.The alarm signal output ends that input combined floodgate circuit and the transformer of second described transformer exits opening circuit is connected with centralized control center of transformer station or transformer station's background computer by fiber optic cables circuit or copper core cable circuit.
As shown in Figure 3, described high-pressure side neutral point isolating switch combined floodgate circuit comprises the first relay, access power supply after the coil KH1 of the first relay connects with the normally opened contact K1 of high-pressure side neutral point isolating switch combined floodgate execution relay, the first normally opened contact of the first relay is connected in the neutral point isolating switch combined floodgate breaker circuit of high-pressure side.As shown in Figure 4, described medium voltage side neutral point isolating switch combined floodgate circuit comprises the second relay, access power supply after the coil KH2 of the second relay connects with the normally opened contact K2 of medium voltage side neutral point isolating switch combined floodgate execution relay, the first normally opened contact of the second relay connects medium voltage side neutral point isolating switch combined floodgate breaker circuit.As shown in Figure 5, high-pressure side is dropped into combined floodgate circuit and is comprised the 3rd relay, access power supply after the second normally opened contact KH22 that close a floodgate normally opened contact K3, the second relay of carrying out relay are dropped in the coil KH3 of the 3rd relay and high-pressure side connect, the first normally opened contact of the 3rd relay is connected in high voltage side of transformer input combined floodgate breaker circuit; As shown in Figure 6, low-pressure side drops into combined floodgate circuit and comprises the 4th relay, the second normally opened contact KH32 of the coil KH4 of the 4th relay and the 3rd relay, low-pressure side drop into the normally opened contact K4 that carries out relay of closing a floodgate connect after access power supply, the first normally opened contact of the 4th relay is connected in step down side input combined floodgate breaker circuit; As shown in Figure 7, medium voltage side drops into combined floodgate circuit and comprises the 5th relay, the second normally opened contact KH42 of the coil KH5 of the 5th relay and the 4th relay, medium voltage side drop into the normally opened contact K5 that carries out relay of closing a floodgate connect after access power supply, the first normally opened contact of the 5th relay is connected in transformer medium voltage side input combined floodgate breaker circuit; As shown in Figure 8, described high-pressure side neutral point isolating switch opening circuit comprises the 6th relay, access power supply after the second normally opened contact KH52 that the coil KH6 of the 6th relay and high-pressure side neutral point isolating switch separating brake are carried out normally opened contact K6, the 5th relay of relay connect, the normally opened contact connection high-pressure side neutral point isolating switch separating brake breaker circuit of the 5th relay; As shown in Figure 9, described medium voltage side neutral point isolating switch opening circuit comprises the 7th relay, access power supply after the second normally opened contact KH62 that the coil KH7 of the 7th relay and medium voltage side neutral point isolating switch separating brake are carried out normally opened contact K7, the 6th relay of relay connect, in the normally opened contact connection medium voltage side neutral point isolating switch separating brake breaker circuit of the 7th relay.
As shown in figure 10, described medium voltage side exits opening circuit and comprises the 8th relay, the coil KH8 of the 8th relay and medium voltage side exit separating brake and carry out after the 3rd normally opened contact KH23 of the normally opened contact K8 of relay, the second relay connect and access power supply, and the first normally opened contact of the 8th relay is connected on transformer medium voltage side and exits in separating brake breaker circuit; As shown in figure 11, described low-pressure side exits opening circuit and comprises the 9th relay, the coil KH9 of the 9th relay and low-pressure side exit separating brake and carry out after the second normally opened contact KH82 of the normally opened contact K9 of relay, the 8th relay connect and access power supply, and the first normally opened contact of the 9th relay is connected on step down side and exits in separating brake breaker circuit; As shown in figure 12, high-pressure side is exited opening circuit and is comprised the tenth relay, the coil KH10 of the tenth relay connects with the normally opened contact K10 that separating brake execution relay is exited in the second normally opened contact KH92, the high-pressure side of the 9th relay, the first normally opened contact of the tenth relay is connected on high voltage side of transformer and exits in separating brake breaker circuit, and the second normally opened contact KH102 of the tenth relay is in parallel with the second normally opened contact KH52 of the 5th relay.
As Fig. 1, shown in Fig. 2, the on high-tension side current signal that detects the first transformer T1 by current detecting translation circuit inputs to electric current and judges that treatment circuit carries out current signal and calculates judgement and process, judge two kinds of sizes values according to input current signal, drop into combined floodgate circuit or exit opening circuit by passing the signal to transformer after time delay, also be sent to high-pressure side neutral point isolating switch combined floodgate circuit and high-pressure side neutral point isolating switch opening circuit, medium voltage side neutral point isolating switch combined floodgate circuit and medium voltage side neutral point isolating switch opening circuit complete automatic switching transformer task, transformer sends signal to centralized control center of transformer station or transformer station's background computer by fiber optic cables circuit or copper core cable circuit after exiting separating brake or transformer input combined floodgate, in centralized control center of described transformer station or transformer station's background computer send alarm signal, on screen, demonstrate that device puts into operation or signal out of service, and show Shi Mou transformer station, certain main transformer puts into operation or is out of service.
In the time that electric current judges that treatment circuit judgement reaches the large current value of setting, after time delay, start high-pressure side neutral point isolating switch combined floodgate and carry out the actuating of relay, its normally open contact K1 closure, the coil KH1 of the first relay obtains electric, the closed high-pressure side neutral point isolating switch that starts of its first normally opened contact closes a floodgate, the second normally opened contact KH12 closure of the first relay simultaneously; Then start medium voltage side neutral point isolating switch combined floodgate and carry out the actuating of relay, its normally open contact K2 closure, the coil KH2 of the second relay obtains electricly, and the closed high-pressure side neutral point isolating switch that starts of its first normally opened contact closes a floodgate, the second normally opened contact KH22 closure of the second relay simultaneously; Then start high-pressure side and drop into the execution actuating of relay of closing a floodgate, its normally opened contact K3 closure, the coil KH3 of the 3rd relay obtains electricly, and combined floodgate circuit breaker is dropped in the closed starting transformer of its first normally opened contact high-pressure side, the normally opened contact KH32 closure of the 3rd relay simultaneously; And then delayed startup low-pressure side drops into the execution actuating of relay of closing a floodgate, its normally open contact K4 closure, the coil KH4 of the 4th relay obtains electricly, and the closed starting transformer low-pressure side of its first normally opened contact drops into combined floodgate circuit breaker, the second normally opened contact KH42 closure of the 4th relay simultaneously; And then delayed startup medium voltage side drops into the execution actuating of relay of closing a floodgate, its normally open contact K5 closure, the coil KH5 of the 5th relay obtains electricly, and the closed starting transformer medium voltage side of its first normally opened contact drops into combined floodgate circuit breaker, the normally opened contact KH52 closure of the 5th relay simultaneously; Finally delayed startup high-pressure side neutral point isolating switch separating brake is carried out the actuating of relay again, its normally open contact K6 closure, the coil KH6 of the 6th relay obtain electric, closed high-pressure side neutral point isolating switch separating brake, the second normally opened contact KH62 closure of starting of its first normally opened contact; Finally delayed startup medium voltage side neutral point isolating switch separating brake is carried out the actuating of relay again, its normally open contact K7 closure, the coil KH7 of the 7th relay obtains electricly, and its normally opened contact is closed starts high-pressure side neutral point isolating switch separating brake, thereby completes the transformer work that puts into operation.The operation sequence that drops into 220kV three-winding transformer is: first high-pressure side neutral point isolating switch is closed, closes medium voltage side neutral point isolating switch and close, close again high voltage side of transformer circuit breaker, then close low-pressure side circuit breaker, then close medium voltage side circuit breaker again, finally disconnect high-pressure side neutral point isolating switch, disconnect medium voltage side neutral point isolating switch again, high-pressure side neutral point isolating switch does not close, medium voltage side neutral point isolating switch does not close, and the high-pressure side circuit breaker of transformer closes not brake application; The high-pressure side circuit breaker of transformer does not close a floodgate, and low-pressure side circuit breaker can not close a floodgate; The low-pressure side circuit breaker of transformer does not close a floodgate, and medium voltage side circuit breaker can not close a floodgate.
In the time that electric current judges that treatment circuit judgement reaches the little current value of setting, after time delay, start high-pressure side neutral point isolating switch combined floodgate and carry out the actuating of relay, its normally open contact K1 closure, the coil KH1 of the first relay obtains electric, the closed high-pressure side neutral point isolating switch that starts of its first normally opened contact closes a floodgate, the second normally opened contact KH12 closure of the first relay simultaneously; Then start medium voltage side neutral point isolating switch combined floodgate and carry out the actuating of relay, its normally open contact K2 closure, the coil KH2 of the second relay obtains electricly, and the closed high-pressure side neutral point isolating switch that starts of its first normally opened contact closes a floodgate, the 3rd normally opened contact KH23 closure of the second relay simultaneously; Then start medium voltage side and exit the separating brake execution actuating of relay, its normally open contact K8 closure, the coil KH8 of the 8th relay obtains electricly, and the closed starting transformer medium voltage side of its first normally opened contact exits separating brake circuit breaker, the second normally opened contact KH82 closure of the 8th relay simultaneously; Then start low-pressure side and exit the separating brake execution actuating of relay, its normally open contact K9 closure, the coil KH9 of the 9th relay obtains electricly, and the closed starting transformer low-pressure side of its first normally opened contact exits separating brake circuit breaker, the second normally opened contact KH92 closure of the 9th relay simultaneously; Last delayed startup high-pressure side is exited separating brake and is carried out the actuating of relay, its normally open contact K10 closure, the coil KH10 of the tenth relay obtains electricly, and separating brake circuit breaker is exited in the closed starting transformer of its first normally opened contact high-pressure side, the second normally opened contact KH102 closure of the tenth relay simultaneously; Finally delayed startup high-pressure side neutral point isolating switch separating brake is carried out the actuating of relay again, its normally open contact K6 closure, the coil KH6 of the 6th relay obtain electric, closed high-pressure side neutral point isolating switch separating brake, the second normally opened contact KH62 closure of starting of its first normally opened contact; Finally delayed startup medium voltage side neutral point isolating switch separating brake is carried out the actuating of relay again, its normally open contact K7 closure, the coil KH7 of the 7th relay obtains electricly, and the closed high-pressure side neutral point isolating switch separating brake that starts of its normally opened contact, completes transformer work out of service.Exiting 220kV three-winding transformer power failure operation sequence is: first high-pressure side neutral point isolating switch closed, again medium voltage side neutral point isolating switch closed, divided transformer medium voltage side circuit breaker, then divide step down side circuit breaker, point high-pressure side circuit breaker then again, finally disconnect high-pressure side neutral point isolating switch, disconnect medium voltage side neutral point isolating switch.High-pressure side neutral point isolating switch does not close, and medium voltage side neutral point is kept apart and do not closed, and the medium voltage side circuit breaker of transformer can not separating brake; The medium voltage side circuit breaker of transformer is non-shut-brake, and low-pressure side circuit breaker can not separating brake; The low-pressure side circuit breaker of transformer is non-shut-brake, and high-pressure side circuit breaker can not separating brake.
Finally explanation: above case only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is described in detail with reference to preferred embodiment; those of ordinary skill in the field are to be understood that; still can the specific embodiment of the present invention be modified or part technical characterictic is replaced on an equal basis; and not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the scope of technical scheme of request protection of the present invention.

Claims (3)

1. a Based Intelligent Control 220kV three-winding transformer parallel running automatic switching device, it is characterized in that: comprise current detecting translation circuit, electric current judges treatment circuit, transformer drops into combined floodgate circuit and transformer exits opening circuit, described current detecting translation circuit is used for being connected on the high-pressure side of first transformer, the signal output part of current detecting translation circuit judges that with electric current the signal input part for the treatment of circuit is connected, electric current judges the signal output part connection transformer input combined floodgate circuit respectively for the treatment of circuit, transformer exits opening circuit and high-pressure side neutral point isolating switch combined floodgate circuit and high-pressure side neutral point isolating switch opening circuit, medium voltage side neutral point isolating switch combined floodgate circuit and medium voltage side neutral point isolating switch opening circuit, transformer drops into combined floodgate circuit and is connected respectively the input combined floodgate breaker circuit of second transformer and exits separating brake breaker circuit with the signal output part that transformer exits opening circuit, high-pressure side neutral point isolating switch combined floodgate circuit and the signal output part of high-pressure side neutral point isolating switch opening circuit are connected respectively high-pressure side neutral point isolating switch combined floodgate breaker circuit and the high-pressure side neutral point isolating switch separating brake breaker circuit of second transformer, medium voltage side neutral point isolating switch combined floodgate circuit and the signal output part of medium voltage side neutral point isolating switch opening circuit are connected respectively medium voltage side neutral point isolating switch combined floodgate breaker circuit and the medium voltage side neutral point isolating switch separating brake breaker circuit of second transformer, wherein said transformer drops into combined floodgate circuit and comprises that combined floodgate circuit is dropped in high-pressure side, low-pressure side drops into combined floodgate circuit and medium voltage side drops into combined floodgate circuit, and described transformer exits opening circuit and comprises that opening circuit is exited in high-pressure side, low-pressure side exits opening circuit and medium voltage side exits opening circuit,
Described electric current judges that treatment circuit comprises A/D change-over circuit, calculates decision circuitry, delay circuit, executive circuit, the output of A/D change-over circuit is connected with the input that calculates decision circuitry, and the output that calculates decision circuitry connects executive circuit by delay circuit;
Described executive circuit comprises high-pressure side input combined floodgate execution relay, low-pressure side drops into close a floodgate carries out relay, medium voltage side drops into close a floodgate carries out relay, high-pressure side is exited separating brake and is carried out relay, low-pressure side exits separating brake and carries out relay, medium voltage side exits separating brake and carries out relay, high-pressure side neutral point isolating switch closes a floodgate and carries out relay and high-pressure side neutral point isolating switch separating brake execution relay, medium voltage side neutral point isolating switch closes a floodgate and carries out relay and medium voltage side neutral point isolating switch separating brake execution relay,
Described high-pressure side neutral point isolating switch combined floodgate circuit comprises the first relay, the coil of the first relay accesses power supply after connecting with the normally opened contact of high-pressure side neutral point isolating switch combined floodgate execution relay, and the first normally opened contact of the first relay connects high-pressure side neutral point isolating switch combined floodgate breaker circuit; Described medium voltage side neutral point isolating switch combined floodgate circuit comprises the second relay, the coil of the second relay accesses power supply after connecting with the normally opened contact of medium voltage side neutral point isolating switch combined floodgate execution relay, and the first normally opened contact of the second relay connects medium voltage side neutral point isolating switch combined floodgate breaker circuit; Described high-pressure side is dropped into combined floodgate circuit and is comprised the 3rd relay, the second normally opened contact that close a floodgate normally opened contact, the second relay of carrying out relay are dropped in the coil of the 3rd relay and high-pressure side connect after access power supply, the first normally opened contact of the 3rd relay is connected in high voltage side of transformer input combined floodgate breaker circuit; Low-pressure side drops into combined floodgate circuit and comprises the 4th relay, the second normally opened contact of the coil of the 4th relay and the 3rd relay, low-pressure side drop into the normally opened contact of carrying out relay of closing a floodgate connect after access power supply, the first normally opened contact of the 4th relay is connected in step down side input combined floodgate breaker circuit; Medium voltage side drops into combined floodgate circuit and comprises the 5th relay, the second normally opened contact of the coil of the 5th relay and the 4th relay, medium voltage side drop into the normally opened contact of carrying out relay of closing a floodgate connect after access power supply, the first normally opened contact of the 5th relay is connected in transformer medium voltage side input combined floodgate breaker circuit; Described high-pressure side neutral point isolating switch opening circuit comprises the 6th relay, the second normally opened contact that the coil of the 6th relay and high-pressure side neutral point isolating switch separating brake are carried out normally opened contact, the 5th relay of relay connect after access power supply, the normally opened contact connection high-pressure side neutral point isolating switch separating brake breaker circuit of the 6th relay; Described medium voltage side neutral point isolating switch opening circuit comprises the 7th relay, the second normally opened contact that the coil of the 7th relay and medium voltage side neutral point isolating switch separating brake are carried out normally opened contact, the 6th relay of relay connect after access power supply, the normally opened contact connection medium voltage side neutral point isolating switch separating brake breaker circuit of the 7th relay.
2. Based Intelligent Control 220kV three-winding transformer parallel running automatic switching device according to claim 1, is characterized in that: the input combined floodgate circuit of second described transformer is connected with centralized control center of transformer station or transformer station's background computer by telecommunication circuit with the alarm signal output ends that exits opening circuit.
3. Based Intelligent Control 220kV three-winding transformer parallel running automatic switching device according to claim 2, it is characterized in that: described medium voltage side exits opening circuit and comprises the 8th relay, the coil of the 8th relay and medium voltage side exit separating brake and carry out after the 3rd normally opened contact of the normally opened contact of relay, the second relay connect and access power supply, and the first normally opened contact of the 8th relay is connected on transformer medium voltage side and exits in separating brake breaker circuit; Low-pressure side exits opening circuit and comprises the 9th relay, the coil of the 9th relay and low-pressure side exit separating brake and carry out after the second normally opened contact of the normally opened contact of relay, the 8th relay connect and access power supply, and the first normally opened contact of the 9th relay is connected on step down side and exits in separating brake breaker circuit; Described high-pressure side is exited opening circuit and is comprised the tenth relay, the coil of the tenth relay is connected with the normally opened contact that separating brake execution relay is exited in the second normally opened contact, the high-pressure side of the 9th relay, the first normally opened contact of the tenth relay is connected on step down side and exits in separating brake breaker circuit, and the second normally opened contact of the tenth relay is in parallel with the second normally opened contact of the 5th relay.
CN201210123463.8A 2012-04-25 2012-04-25 Automatic switching device for intelligent control of parallel operation of 220kV three-winding transformers Expired - Fee Related CN102646994B (en)

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CN201260071Y (en) * 2008-06-20 2009-06-17 江苏省电力公司沭阳县供电公司 Transformer cooler control circuit
CN101741095A (en) * 2008-11-26 2010-06-16 陈家斌 Automatic switching device for economic operation of power transformer
CN202524088U (en) * 2012-04-25 2012-11-07 河南省电力公司驻马店供电公司 Intelligent control 220kV three-winding transformer parallel running automatic switching device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201260071Y (en) * 2008-06-20 2009-06-17 江苏省电力公司沭阳县供电公司 Transformer cooler control circuit
CN101741095A (en) * 2008-11-26 2010-06-16 陈家斌 Automatic switching device for economic operation of power transformer
CN202524088U (en) * 2012-04-25 2012-11-07 河南省电力公司驻马店供电公司 Intelligent control 220kV three-winding transformer parallel running automatic switching device

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