CN105552883A

CN105552883A - Control method and system for converting to paralleling operation from splitting operation of three-bus segmented substation

Info

Publication number: CN105552883A
Application number: CN201510946945.7A
Authority: CN
Inventors: 吴锦源; 梁国坚; 林韶文; 谢幸生; 彭嵩; 陈岸; 李垂有; 葛晓新; 曲骅; 李福鹏; 张永挺; 黄芸生; 权少静
Original assignee: Zhongshan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Zhongshan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2015-12-16
Filing date: 2015-12-16
Publication date: 2016-05-04
Anticipated expiration: 2035-12-16
Also published as: CN105552883B

Abstract

The invention discloses a control method and system for converting to paralleling operation from splitting operation of a three-bus segmented substation. The switching of splitting operation to paralleling operation can be proceeded according to a switching instruction and the state of each switch, an operator is not needed to get involved in judgment, the paralleling operation of buses is achieved, the operation safety is ensured, the operation time is shortened, the outage time of a user is possibly reduced to minimum and the requirement for safety and reliability are met; a step-down switch connected with a main transformer which is required to maintain is switched off and then a bus coupling switch is switched on, fault explosion occurring in the substation with short-circuit current exceeding the standard can be effectively avoided, and the power supply safety is guaranteed; and after power is supplied to a bus corresponding to the main transformer which is required to maintain from a second main transformer, a bus coupling switch connected with the second main transformer and connected with a main transformer which is not required to maintain is closed, so that power is supplied to the bus connected with the second main transformer and connected with the main transformer which is not required to maintain from the main transformer which is not required to maintain, the load of the second main transformer is reduced, and load balance is achieved.

Description

Triple bus-bar segmentation transformer station turns control method and the system of paired running by apportion

Technical field

The present invention relates to field of power system control, particularly a kind of triple bus-bar segmentation transformer station is turned control method and the system of paired running by apportion.

Background technology

Present Domestic Substation Operating generally adopts manually-operated method, operating personnel carry out calling out the names of those voted for while counting ballot-slips and answer song according to the content of operation order, manual operation item by item, it is long to there is the operating time in the method, the correctness of operation depends on the human factors such as the experience of operating personnel, sense of responsibility and the state of mind, there is the problem of erroneous judgement, misoperation.

As shown in Figure 1, in triple bus-bar segmentation transformer station, comprise main transformer, step-down switch, bus, mains switch and bus connection switch, wherein, main transformer comprises the first main transformer, second main transformer and the 3rd main transformer, step-down switch comprises the first step-down switch, second step-down switch, 3rd step-down switch and the 4th step-down switch, bus connection switch comprises the first bus connection switch and the second bus connection switch, bus comprises the first bus, second bus, triple bus-bar and the 4th bus, mains switch comprises the first mains switch, second source switch, 3rd mains switch and the 4th mains switch.First main transformer is connected with the first bus by the first step-down switch, second main transformer is connected with the second bus by the second step-down switch, second main transformer is connected with triple bus-bar by the 3rd step-down switch, 3rd main transformer is connected with the 4th bus by the 4th step-down switch, first bus is connected with the second bus by the first bus connection switch, triple bus-bar is connected with the 4th bus by the second bus connection switch, first bus is connected with load by the first mains switch, second bus is connected with load by second source switch, triple bus-bar is connected with load by the 3rd mains switch, 4th bus is connected with load by the 4th mains switch.

In triple bus-bar segmentation transformer station, each main transformer has the bus of its correspondence, main transformer is load supplying by bus, such as, the bus that first main transformer is corresponding is the first bus, when needing the maintenance carrying out main transformer in transformer station, the low-pressure side bus load of the main transformer of maintenance is needed to be powered by another main transformer side by side, i.e. power supply side by side, such as, when the first main transformer maintenance, need to convert the first corresponding for the first main transformer bus to second main transformer and power, when the 3rd main transformer maintenance, need to convert the 4th corresponding for the 3rd main transformer bus to second main transformer and power.Routine is the bus connection switch that first closes, then disconnects step-down switch, namely first again main transformer is turned maintenance side by side.But when the short circuit current arranged side by side in system exceedes the drop-out current of switch, may occur cannot the situation of cutting-off of short-circuit electric current, equipment explosion occurs and jeopardizes personal safety, therefore need first to disconnect step-down switch, namely first main transformer is turned maintenance, bus corresponding for maintenance main transformer is had a power failure, then the bus connection switch that closes, recover the power supply of power failure bus, but employing manual operation, need more than 15 minutes, consuming time longer, reduce power supply reliability index.And in the transformer station of triple bus-bar section wiring mode, when any main transformer maintenance in both sides, the bus that maintenance main transformer is corresponding converts middle main transformer to and powers, namely convert the second main transformer to power, then the second main transformer needs the load bearing two main transformers originally, and the second main transformer is just powered to two buses originally, easily causes the second main transformer overload to cause transformer station to occur accident, is unfavorable for the safety of transformer station.

Summary of the invention

Based on this, be necessary to turn parallel operation length consuming time for apportion and the overweight problem of main transformer supply load, provide and can shorten the operating time and the triple bus-bar segmentation transformer station that can balance main transformer load is turned control method and the system of paired running by apportion.

Triple bus-bar segmentation transformer station is turned a control method for paired running by apportion, comprise the following steps:

Obtain apportion and turn switching command arranged side by side, the main transformer needing turn main transformer of maintenance and non-required to turn maintenance is obtained in the first main transformer and the 3rd main transformer according to described switching command, and obtain the on off state of triple bus-bar segmentation transformer station, wherein, described on off state comprises the first bus connection switch state, the second bus connection switch state, the first step-down on off state, the second step-down on off state, the 3rd step-down on off state and the 4th step-down on off state;

When described triple bus-bar segmentation transformer station meets the executive condition of described switching command, the step-down switch controlling to be connected with the main transformer that described needs turn maintenance disconnects, wherein, the executive condition of described switching command comprises described needs and turns that the main transformer of maintenance and the bus connection switch between the second main transformer are in gate-dividing state, the step-down switch that is connected with the main transformer that described needs turn maintenance is in "on" position and the step-down switch that is connected with the main transformer that described needs turn maintenance in described second step-down switch and described 3rd step-down switch is in "on" position;

When the step-down switch be connected with the main transformer that described needs turn maintenance disconnects successfully, control the bus connection switch that described needs turn between the main transformer of maintenance and described second main transformer and close a floodgate;

When described triple bus-bar segmentation transformer station also meets load balancing controlled condition, judge whether the main transformer that described second main transformer and described non-required turn maintenance meets paired running condition, wherein, the bus connection switch that described load balancing controlled condition comprises between main transformer that described second main transformer and described non-required turn maintenance is in "on" position, the step-down switch that the main transformer turning maintenance with described non-required is connected is in "on" position and the step-down switch turning the main transformer of maintenance in described second step-down switch and described 3rd step-down switch with described needs disconnected is in "on" position, it is identical with the wiring group that described non-required turns the main transformer of maintenance that described paired running condition comprises described second main transformer, the no-load voltage ratio difference that described second main transformer and described non-required turn the main transformer of maintenance is preset in error first, and the short-circuit voltage difference that described second main transformer and described non-required turn the main transformer of maintenance is preset in error second,

If meet, then the bus connection switch between the main transformer described second main transformer and described non-required being turned maintenance closes a floodgate, then disconnects the disconnected step-down switch of the main transformer that turns maintenance in described second step-down switch and described 3rd step-down switch with described needs;

If do not meet, then disconnect the step-down switch that the main transformer that turns maintenance in described second step-down switch and described 3rd step-down switch with described needs is disconnected, then between the main transformer described second main transformer and described non-required being turned maintenance, bus connection switch closes a floodgate.

The present invention also provides a kind of triple bus-bar segmentation transformer station to be turned the control system of paired running by apportion, comprising:

Acquisition module, for obtaining the switching command that apportion turns arranged side by side, the main transformer needing turn main transformer of maintenance and non-required to turn maintenance is obtained in the first main transformer and the 3rd main transformer according to described switching command, and obtain the on off state of triple bus-bar segmentation transformer station, wherein, described on off state comprises the first bus connection switch state, the second bus connection switch state, the first step-down on off state, the second step-down on off state, the 3rd step-down on off state and the 4th step-down on off state;

First control module, for when triple bus-bar segmentation transformer station meets the executive condition of described switching command, the step-down switch controlling to be connected with the main transformer that described needs turn maintenance disconnects, wherein, the executive condition of described switching command comprises described needs and turns that the main transformer of maintenance and the bus connection switch between described second main transformer are in gate-dividing state, the step-down switch that is connected with the main transformer that described needs turn maintenance is in "on" position and the step-down switch that is connected with the main transformer that described needs turn maintenance in described second step-down switch and described 3rd step-down switch is in "on" position;

Second control module, during for disconnecting successfully when the step-down switch be connected with the main transformer that described needs turn maintenance, controlling the bus connection switch that described needs turn between the main transformer of maintenance and described second main transformer and closing a floodgate;

3rd control module, for when described triple bus-bar segmentation transformer station also meets load balancing controlled condition, judge whether the main transformer that described second main transformer and described non-required turn maintenance meets paired running condition, wherein, described load balancing controlled condition comprises the bus connection switch that the main transformer that turns maintenance with described non-required is connected and is in "on" position, the step-down switch that the main transformer turning maintenance with described non-required is connected is in "on" position and the step-down switch turning the main transformer of maintenance in described second step-down switch and described 3rd step-down switch with described needs disconnected is in "on" position, it is identical with the wiring group that described non-required turns the main transformer of maintenance that described paired running condition comprises described second main transformer, the no-load voltage ratio difference that described second main transformer and described non-required turn the main transformer of maintenance is preset in error first, and the short-circuit voltage difference that described second main transformer and described non-required turn the main transformer of maintenance is preset in error second,

4th control module, during for judging to meet paired running condition by described 4th control module, bus connection switch between the main transformer described second main transformer and described non-required being turned maintenance closes a floodgate, disconnect the step-down switch that the main transformer that turns maintenance in described second step-down switch and described 3rd step-down switch with described needs is disconnected again, when judging not meet paired running condition by described 4th control module, disconnect the step-down switch that the main transformer that turns maintenance in described second step-down switch and described 3rd step-down switch with described needs is disconnected, bus connection switch between the main transformer more described second main transformer and described non-required being turned maintenance closes a floodgate.

Above-mentioned triple bus-bar segmentation transformer station is turned control method and the system of paired running by apportion, by obtaining the state of each switch, only need carry out according to switching command and according to each on off state the switching that apportion turns paired running, without the need to carrying out the operation that apportion turns arranged side by side manually, get involved judgement without the need to operating personnel, realize bus paired running, while guaranteeing handling safety, shorten the operating time, client's interruption duration is dropped to minimum as far as possible, meet the index request to safety and reliability.And adopt and first disconnect and need to turn the step-down switch that the main transformer that overhauls is connected and remerge bus connection switch, in the transformer station that short circuit current exceeds standard, switch effectively can be avoided to break down the situation of exploding, ensure that power supply safety.In order to avoid the second main transformer overload, cause unsafe problems, after the bus that the main transformer needing to turn maintenance is corresponding is powered by the second main transformer, by be connected with the second main transformer and the bus connection switch be connected with the main transformer that non-required turns maintenance close, realize being connected with the second main transformer and the bus that the main transformer turning maintenance with non-required is connected turns the main transformer overhauled by non-required powers, alleviate the load of the second main transformer, realize load balancing, avoid the safety problem that the second main transformer overload causes, improve substation safety.

Accompanying drawing explanation

Fig. 1 is the structural representation of triple bus-bar segmentation transformer station;

Fig. 2 is the triple bus-bar segmentation transformer station of an execution mode is turned the control method of paired running flow chart by apportion;

Fig. 3 is the triple bus-bar segmentation transformer station of another execution mode is turned the control method of paired running flow chart by apportion;

Fig. 4 is the triple bus-bar segmentation transformer station of another execution mode is turned the control method of paired running flow chart by apportion;

Fig. 5 is the triple bus-bar segmentation transformer station of an execution mode is turned the control system of paired running module map by apportion;

Fig. 6 is the triple bus-bar segmentation transformer station of another execution mode is turned the control system of paired running module map by apportion;

Fig. 7 is the triple bus-bar segmentation transformer station of another execution mode is turned the control system of paired running module map by apportion.

Embodiment

Refer to Fig. 1 and Fig. 2, provide a kind of triple bus-bar segmentation transformer station of execution mode to be turned the control method of paired running by apportion, comprise the following steps:

S100: obtain apportion and turn switching command arranged side by side, obtains in the first main transformer and the 3rd main transformer the main transformer needing turn main transformer of maintenance and non-required to turn maintenance, and obtains the on off state of triple bus-bar segmentation transformer station according to switching command.

Wherein, on off state comprises the first bus connection switch state, the second bus connection switch state, the first step-down on off state, the second step-down on off state, the 3rd step-down on off state and the 4th step-down on off state.When the first main transformer overhauls, need the second main transformer to power to the first bus, when the 3rd main transformer overhauls, need the second main transformer to power to the 4th bus.Operating personnel are at the background computer interface operation of man-machine interaction, the switching command that apportion turns arranged side by side can be produced, such as, need the first main transformer maintenance, first bus turns when being powered by the second main transformer, carry out interface operation, produce switching command, according in known first main transformer of this switching command and the 3rd main transformer, this needs the main transformer of maintenance and the main transformer of this non-required maintenance.In addition, the on off state obtaining triple bus-bar segmentation transformer station is also needed.

S200: when triple bus-bar segmentation transformer station meets the executive condition of switching command, controls to disconnect with needing turn step-down switch that the main transformer overhauled is connected.

Wherein, the executive condition of switching command comprises that main transformer and the bus connection switch between the second main transformer that needs turn maintenance are in gate-dividing state, the step-down switch that is connected with the main transformer that needs turn overhaul is in "on" position and the step-down switch that is connected with the main transformer that needs turn overhaul in the second step-down switch and the 3rd step-down switch is in "on" position.When above-mentioned state all meets, represent the executive condition tentatively meeting switching command, can subsequent treatment be carried out, namely controlling to disconnect with needing turn step-down switch that the main transformer overhauled is connected, stopping the main transformer needing to turn maintenance to power.

S300: when the step-down switch be connected with the main transformer that needs turn overhaul disconnects successfully, control needs turn the bus connection switch between main transformer and the second main transformer overhauled and close a floodgate.

When controlling step-down switch and disconnecting, due to the impact of external condition, may cause disconnecting unsuccessfully, only have when step-down switch disconnects successfully, just carry out subsequent treatment, namely when the step-down switch be connected with the main transformer that needs turn overhaul disconnects successfully, stop power supply owing to needing the main transformer of maintenance, the bus of its correspondence is also stopped power supply, the second main transformer is needed to be this bussed supply, thus need to need the bus connection switch turned between the main transformer of maintenance and the second main transformer to close, the second main transformer so just can be made for its power supply, namely the bus connection switch controlled again between the main transformer of needs turn maintenance and the second main transformer closes a floodgate, namely first turn off and remerge.

S400: when triple bus-bar segmentation transformer station also meets load balancing controlled condition, judges whether the main transformer that the second main transformer and non-required turn maintenance meets paired running condition.

Wherein, load balancing controlled condition comprises bus connection switch that the main transformer that turns maintenance with non-required is connected is in "on" position, the main transformer that turns maintenance with non-required is connected step-down switch and is in "on" position and the step-down switch turning the main transformer that overhauls in the second step-down switch and the 3rd step-down switch with needs disconnected is in "on" position.The no-load voltage ratio difference that paired running condition comprises that the second main transformer is identical with the wiring group that non-required turns the main transformer of maintenance, the second main transformer and non-required turn the main transformer of maintenance is preset in error and short-circuit voltage difference that the second main transformer and non-required turn the main transformer of maintenance is preset in error second first

Powered by the second main transformer because the bus corresponding at the main transformer needing to overhaul turns, the second main transformer overload may be caused, cause unsafe problems, follow-uply need that another bus in the second main transformer is turned the main transformer overhauled by non-required and power, carry out load balancing control.But, another bus in second main transformer turns the process that the main transformer that overhauled by non-required powers two kinds of modes, wherein a kind of be first merge the second main transformer and non-required maintenance main transformer between bus connection switch, again to be connected with the second main transformer and the step-down switch be connected with the main transformer that non-required is overhauled disconnects, but, if first merge bus connection switch, then the second main transformer and non-required turn the main transformer of maintenance is power side by side simultaneously, according to parallel operation of transformers condition, when two transformers are identical bussed supply side by side simultaneously, need these two transformer connection groups identical, the no-load voltage ratio that second main transformer and non-required turn the main transformer of maintenance is identical, allow the difference of ± 0.5%, the short-circuit voltage that second main transformer and non-required turn the main transformer of maintenance is identical, allow the difference of ± 10%.Thus, when meeting paired running condition, by step S500 first merge the second main transformer and non-required maintenance main transformer between bus connection switch, again to be connected with the second main transformer and the disconnected step-down switch of the main transformer overhauled with needs disconnects, to be connected with the second main transformer and turn the disconnected bus of the main transformer that overhauls with needs and turn the main transformer turning maintenance by non-required and power, realize load balancing.When not meeting above-mentioned paired running condition, by step S600 first to be connected with the second main transformer and the step-down switch be connected with the main transformer that non-required is overhauled disconnects, remerge the second main transformer and non-required maintenance main transformer between bus connection switch, to be connected with the second main transformer and turn the disconnected bus of the main transformer that overhauls with needs and turn the main transformer turning maintenance by non-required and power, realize load balancing.

If meet, then perform step S500.

S500: the bus connection switch between the main transformer the second main transformer and non-required being turned maintenance closes a floodgate, then disconnect a step-down switch disconnected with needing to turn the main transformer that overhauls in the second step-down switch and the 3rd step-down switch.

If do not meet, then perform step S600.

S600: disconnect in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, then the bus connection switch between the main transformer the second main transformer and non-required being turned maintenance closes a floodgate.

Due in triple bus-bar section wiring transformer station, when any main transformer maintenance in both sides, the bus that maintenance main transformer is corresponding converts middle main transformer to and powers, namely convert the second main transformer to power, then the second main transformer needs the load bearing two main transformers originally, and the second main transformer is just powered to two buses originally, easily causes the second main transformer overload.Controlling by adding load balancing, namely realizing by step S500 or by step S600 the object meeting balance, effectively avoiding load to concentrate on the situation of a main transformer, improving substation safety.

Above-mentioned triple bus-bar segmentation transformer station is turned the control method of paired running by apportion, when triple bus-bar segmentation transformer station meets the executive condition of switching command, control to disconnect with needing turn step-down switch that the main transformer overhauled is connected, successfully represent that main transformer needs being turned maintenance transfers inspecting state to when disconnecting, do not power, the bus connection switch controlled again between the main transformer of needs turn maintenance and the second main transformer closes a floodgate, bussed supply corresponding to main transformer utilizing the second main transformer to be maintenance, needs a bus for the main transformer turning maintenance to turn and is powered successfully by the second main transformer.But, now the load of the second main transformer may be overweight, need to carry out load balancing control, namely when triple bus-bar segmentation transformer station also meets load balancing controlled condition, judge whether the main transformer that the second main transformer and non-required turn maintenance meets paired running condition, when meeting, bus connection switch between the main transformer second main transformer and non-required being turned maintenance closes a floodgate, disconnect again in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, when not meeting, first disconnect in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, bus connection switch between the main transformer again the second main transformer and non-required being turned maintenance closes a floodgate, alleviate the load of the second main transformer.By obtaining the state of each switch, only need carry out according to switching command and according to each on off state the switching that apportion turns paired running, without the need to carrying out the operation that apportion turns arranged side by side manually, judgement is got involved without the need to operating personnel, realize bus paired running, shorten the operating time while guaranteeing handling safety, client's interruption duration is dropped to minimum as far as possible, meet the index request to safety and reliability.And adopt and first disconnect and need to turn the step-down switch that the main transformer that overhauls is connected and remerge bus connection switch, in the transformer station that short circuit current exceeds standard, switch effectively can be avoided to break down the situation of exploding, ensure that power supply safety.In order to avoid the second main transformer overload, cause unsafe problems, after the bus that the main transformer needing to turn maintenance is corresponding is powered by the second main transformer, by be connected with the second main transformer and the bus connection switch be connected with the main transformer that non-required turns maintenance close, realize being connected with the second main transformer and the bus that the main transformer turning maintenance with non-required is connected turns the main transformer overhauled by non-required powers, alleviate the load of the second main transformer, realize load balancing, avoid the safety problem that the second main transformer overload causes, improve substation safety.

Wherein in an embodiment, the executive condition of switching command also comprises voltage that needs turn bus corresponding to the main transformer of maintenance and is greater than preset first threshold value and connects with the second main transformer and the voltage of bus that the bus corresponding with the main transformer that needs turn overhaul is connected is greater than default Second Threshold.

Because on off state exists pseudo-state, namely switch is actual is in separating brake, but when obtaining on off state, the state information obtained is for closing a floodgate, in order to reduce error, further confirmation bus connection switch is in "on" position, then increase voltage swing to judge, namely increase and judge whether the voltage of bus corresponding to main transformer needing to turn maintenance is greater than preset first threshold value and connects with the second main transformer and whether the voltage of bus that the bus corresponding with the main transformer that needs turn overhaul is connected is greater than default Second Threshold, during due to fanout operation, the first bus connection switch between first bus and the second bus disconnects, first main transformer is the first bussed supply, second main transformer is respectively the second bussed supply, only have when the voltage on the first bus is greater than preset first threshold value, represent that the first bus really has voltage, represent that the first step-down switch is actually to close, otherwise be pseudo-combined floodgate.

Load balancing controlled condition also comprises busbar voltage that the second bus is connected with the main transformer turning maintenance with non-required in triple bus-bar and is greater than default 3rd threshold value and the busbar voltage be connected with the main transformer that non-required turns maintenance in the first bus and the 4th bus is greater than default 4th threshold value.

When needs carry out load balancing control, demand fulfillment load balancing controlled condition, namely to meet switch that the main transformer that turns maintenance with non-required is connected and be in "on" position and the step-down switch be connected with the main transformer that non-required turns maintenance in the second step-down switch and the 3rd step-down switch is in "on" position, but, due to extraneous factor interference, pseudo-state may be there is in switch, thus need the state confirming switch further, namely by judging the voltage swing flowing through switch, the state of its reality can be judged, more adequately can judge on off state, improve accuracy.

In actual applications, by the primary winding of voltage transformer is connected with bus, export the secondary side voltage after busbar voltage no-load voltage ratio by the secondary coil of voltage transformer, by voltage acquisition module, this voltage is gathered, thus the voltage of bus can be obtained.Such as, as shown in Figure 1, be connected to the voltage transformer pt 1 on the first bus, its secondary coil exports the secondary voltage after the first busbar voltage no-load voltage ratio, is gathered this voltage by voltage acquisition module, can obtain the voltage of the first bus, be connected to the voltage transformer pt 2 on the second bus, its secondary coil exports the secondary voltage after the second busbar voltage no-load voltage ratio, is gathered this voltage by voltage acquisition module, can obtain the voltage of the second bus.By the primary winding of current transformer is connected with the low-pressure side of switch, the primary winding of the electric current inflow current instrument transformer of the low-pressure side of switch, secondary side switches electric current after the secondary coil generation switching current no-load voltage ratio of current transformer, by current acquisition module, this voltage is gathered, thus can switching current be obtained.Such as, Current Transmit 1 is connected to the low-pressure side of the first step-down switch, its secondary coil produces the secondary side current after the first step-down switching current no-load voltage ratio, thus the first step-down switching current can be obtained, Current Transmit 2 is connected to the low-pressure side of the second step-down switch, its secondary coil produces the secondary side current after the second step-down switching current no-load voltage ratio, thus can obtain the second step-down switching current.Current Transmit 11 to CT1n is connected to the low-pressure side of the first corresponding mains switch, the electric current of each first mains switch can be obtained, Current Transmit 2A1 to CT2An is connected to the low-pressure side of corresponding second source switch, the electric current of each second source switch can be obtained, Current Transmit 2B1 to CT2Bn is connected to the low-pressure side of the 3rd corresponding mains switch, the electric current of each 3rd mains switch can be obtained, Current Transmit 31 to CT3n is connected to the low-pressure side of the 4th corresponding mains switch, the electric current of each 4th mains switch can be obtained.

Wherein in an embodiment, when with need to turn a step-down switch that the main transformer that overhaul is connected disconnects successfully time, also comprise before the step S300 that the bus connection switch of control needs turn between the main transformer overhauled and the second main transformer closes a floodgate:

Judge whether be in separating brake with needing turn step-down on off state that the main transformer overhauled is connected, and whether be less than default first current threshold with needing a turn electric current for the step-down switch that the main transformer overhauled is connected.

When being in separating brake with needing turn step-down on off state that the main transformer overhauled is connected, and with when needing a turn electric current for the step-down switch that the main transformer overhauled is connected to be less than default first current threshold, disconnect successfully with needing turn step-down switch that the main transformer overhauled is connected, otherwise, disconnect unsuccessfully with needing turn step-down switch that the main transformer overhauled is connected, prompting disconnects failure information.

When triple bus-bar segmentation transformer station meets the executive condition of switching command, control with when needing turn step-down switch that the main transformer overhauled is connected to disconnect, in order to avoid extraneous factor pair with need to turn a step-down switch that the main transformer that overhaul is connected and disconnect the process step-down switch causing the main transformer overhauled with needs turn to be connected that has an impact and really do not disconnect, need to confirm whether disconnect successfully with needing turn step-down switch that the main transformer overhauled is connected further, namely by judging whether to be in separating brake with needing turn step-down on off state that the main transformer overhauled is connected, and be less than default first current threshold with needing a turn electric current for the step-down switch that the main transformer overhauled is connected, only have when this both meets, represent and disconnect successfully with needing turn step-down switch that the main transformer overhauled is connected, carry out next step process, otherwise, disconnect unsuccessfully, prompting disconnects failure information, stop this to switch.

Refer to Fig. 3, wherein in an embodiment, when with need to turn a step-down switch that the main transformer that overhaul is connected disconnects successfully time, the step S300 that the bus connection switch of control needs turn between the main transformer overhauled and the second main transformer closes a floodgate specifically comprises:

S310: when with when needing turn step-down switch that the main transformer overhauled is connected to disconnect successfully, control and need turn mains switch that the bus that the main transformer overhauled is corresponding connects to disconnect.

S320: control needs the bus connection switch turned between the main transformer of maintenance and the second main transformer to close a floodgate, and close a floodgate with needing turn mains switch that the bus that the main transformer overhauled is corresponding connects.

Stop power supply owing to needing the main transformer of maintenance, the bus of its correspondence is also stopped power supply, the second main transformer is needed to be this bussed supply, thus need to need the bus connection switch turned between the main transformer of maintenance and the second main transformer to close, the second main transformer so just can be made for its power supply, but, carrying out first disconnecting with needing turn mains switch that the bus that the main transformer overhauled is corresponding connects before bus connection switch closes, carry out bus connection switch combined floodgate again, improve the fail safe of transformer station's electric power system, after bus connection switch closes a floodgate, closing a floodgate with needing turn mains switch that the bus that the main transformer overhauled is corresponding connects, namely the second main transformer is by needing turn bus that the main transformer of maintenance is corresponding to be load supplying.

Refer to Fig. 4, wherein in an embodiment, control needs the bus connection switch turned between the main transformer of maintenance and the second main transformer to close a floodgate, and comprises with needing turn step S320 that the mains switch that the bus that the main transformer overhauled is corresponding connects closes a floodgate:

S321: when with when needing the electric current turning the mains switch that bus corresponding to the main transformer that overhaul connects to be less than default second current threshold and the voltage that needs turn bus corresponding to the main transformer that overhaul is less than preset first threshold value, the bus connection switch of control needs turn between the main transformer overhauled and the second main transformer closes a floodgate.

S322: be in "on" position when needing the main transformer turning maintenance with the bus connection switch between the second main transformer, the voltage of bus that needs the electric current of the bus connection switch turned between the main transformer that overhaul with the second main transformer to be greater than main transformer that default 3rd current threshold and needs turn overhaul is corresponding is when being greater than preset first threshold value, the mains switch that the bus corresponding with the main transformer that needs turn overhaul connects is closed a floodgate.

When with need to turn after a mains switch that bus corresponding to the main transformer that overhauls connect disconnects, the bus connection switch controlled again between the main transformer of needs turn maintenance and the second main transformer closes a floodgate, but, may really not disconnect with needing turn mains switch that the bus that the main transformer overhauled is corresponding connects, thus need whether to disconnect it successfully to judge, namely judge and need the electric current turning the mains switch that bus corresponding to the main transformer that overhauls connects whether to be less than default second current threshold and whether the voltage of bus corresponding to the main transformer that overhauls of needs turn is less than preset first threshold value, when both all meet, representing disconnects successfully, namely had a power failure with needing turn bus that the main transformer overhauled is corresponding, first main transformer is no longer to this bussed supply, carry out control bus connection switch again to close a floodgate.

Only have and to carry out next step process successfully again when needing the bus connection switch turned between the main transformer of maintenance and the second main transformer to close a floodgate, whether successful in order to confirm that the needs bus connection switch turned between the main transformer of maintenance and the second main transformer closes a floodgate further, need to judge whether the bus connection switch state that needs turn between the main transformer of maintenance and the second main transformer is in combined floodgate, need to turn the voltage whether main transformer of maintenance and the electric current of the bus connection switch between the second main transformer be greater than bus corresponding to main transformer that default 3rd current threshold and needs turn overhaul and whether be greater than preset first threshold value, when all meeting, representing closes a floodgate successfully, the bus being power failure by the second main transformer restores electricity, supply power mode handover success, realize paired running, can be for further processing, the mains switch that the bus corresponding with the main transformer that needs turn overhaul being about to disconnect connects closes a floodgate, for load is powered.

Wherein in an embodiment, disconnect the second step-down switch and the step-down switch be connected with the main transformer that non-required turns maintenance in the 3rd step-down switch, then the step S600 that the bus connection switch be connected with the main transformer that non-required turns maintenance closes a floodgate specifically comprised:

Disconnect the second step-down switch and the step-down switch be connected with the main transformer that non-required turns maintenance in the 3rd step-down switch, and control the second step-down switch and disconnect with the mains switch that the step-down switch be connected with the main transformer that non-required turns maintenance in the 3rd step-down switch connects;

Bus connection switch between the main transformer second main transformer and non-required being turned maintenance closes a floodgate, and the second step-down switch controlling to disconnect closes a floodgate with the mains switch that the step-down switch be connected with the main transformer that non-required turns maintenance in the 3rd step-down switch connects.

Due to may mains switch be there is between bus and load, if the closed energising of mains switch, when closed bus connection switch instantaneously to a large amount of load supplying, whole transformer substation system may be caused to power dangerous, thus, in order to improve fail safe, when bus connection switch closes, first disconnected by the mains switch be connected between bus and load, bus connection switch closes successfully, again mains switch is closed, realize the power supply to load.

Above-mentioned preset first threshold value, default Second Threshold, default 3rd threshold value, default 4th threshold value, default first current threshold, default second current threshold and default 3rd current threshold preset according to transformer station's actual conditions.

Refer to Fig. 1, with a specific embodiment, the control method that above-mentioned triple bus-bar segmentation transformer station turns paired running by apportion is illustrated below, specifically to the first main transformer maintenance, first bus turns is powered by the second main transformer, for making load balancing, and triple bus-bar is turned the control procedure that the apportion of being powered by the 3rd main transformer turns paired running and be described, namely the first main transformer is the main transformers needing to turn maintenance, and the 3rd main transformer is the main transformer that non-required turns maintenance.

First, at the background computer interface operation of man-machine interaction, produce apportion and turn switching command arranged side by side, namely produce the first main transformer and turn maintenance, first bus turns the switching command of being powered by the second main transformer, be issued to logic control device from this switching command of output of host computer, obtain apportion and turn switching command arranged side by side, obtain the main transformer needing to turn maintenance, i.e. the first main transformer, obtain the main transformer that non-required turns maintenance, i.e. the 3rd main transformer, and obtain the first bus connection switch state in triple bus-bar segmentation transformer station, second bus connection switch state, first step-down on off state, second step-down on off state, 3rd step-down on off state and the 4th step-down on off state.

Judge whether triple bus-bar segmentation transformer station meets the executive condition of switching command, when meeting the executive condition of switching command, produce the open command that control first step-down switch disconnects, according to open command, control the first step-down switch to disconnect, particularly, the executive condition of switching command now comprise be in gate-dividing state with the first bus connection switch, the first step-down state be in close a floodgate, the second step-down switch is in "on" position, the voltage of the first bus is greater than preset first threshold value and be greater than default Second Threshold with the voltage of the second bus.

Judge whether the first step-down on off state is in separating brake again, and whether the electric current of the first step-down switch is less than default first current threshold, if so, then the first step-down switch disconnects successfully, and if not, then the first step-down switch disconnects unsuccessfully, and prompting disconnects failure information.

When the first step-down switch disconnects successfully, control the first mains switch disconnection that the first bus connects, when the electric current of the first mains switch is less than default second current threshold and the voltage that needs turn bus corresponding to the main transformer of maintenance is less than preset first threshold value, control the first bus connection switch again to close a floodgate, when the first bus connection switch be in "on" position, the electric current of the first bus connection switch is greater than default 3rd current threshold and the first voltage is greater than preset first threshold value time, the first mains switch be connected with the first bus is closed a floodgate.

Now, the first main transformer turns maintenance, and the first bus turns to be powered by the second main transformer and converts.Now the second main transformer bears the load that an another main transformer bears, and in order to make load balancing, needs triple bus-bar to turn to be powered by the 3rd main transformer.Namely when triple bus-bar segmentation transformer station also meets load balancing controlled condition, judge whether the second main transformer and the 3rd main transformer meet paired running condition, if meet, then the second bus connection switch is closed a floodgate, disconnect the 3rd step-down switch again, if do not meet, then disconnect the 3rd step-down switch, 3rd step-down switch is connected with triple bus-bar, cut off and be connected the 3rd mains switch with triple bus-bar, again the second bus connection switch is closed a floodgate, then the 3rd mains switch disconnected is closed a floodgate, be that triple bus-bar is powered by the 3rd main transformer, namely the triple bus-bar that the second main transformer is corresponding turns and is completed by the 3rd main transformer power switching.Particularly, load balancing controlled condition now comprises that the second bus connection switch is in "on" position, the 4th step-down switch is in "on" position and the 3rd step-down switch is in "on" position, paired running condition comprises that the second main transformer is identical with the wiring group of the 3rd main transformer, the no-load voltage ratio difference of the second main transformer and the 3rd main transformer first presetting in error, the short-circuit voltage difference of the second main transformer and the 3rd main transformer second presetting in error, triple bus-bar voltage is greater than default 3rd threshold value and the 4th busbar voltage is greater than default 4th threshold value.

The first corresponding for the first main transformer needing to turn maintenance bus can be realized to turn powered by the second main transformer by above-mentioned steps, the triple bus-bar that the second main transformer is corresponding turns is powered by triple bus-bar, realizes load balancing.The description of control procedure is balanced when being more than and needing to overhaul to the first main transformer, if desired the 3rd main transformer is overhauled, the 4th corresponding for 3rd main transformer bus is turned and is powered by the second main transformer, the load balancing process that the second bus that second main transformer is corresponding turns when the load balancing process of being powered by the first main transformer and above-mentioned first main transformer overhaul is similar, by needing the first main transformer turning maintenance to change the 3rd main transformer into, do not repeating at this.

Refer to Fig. 5, the present invention also provides a kind of triple bus-bar segmentation transformer station of execution mode to be turned the control system of paired running by apportion, comprising:

Acquisition module 100, for obtaining the switching command that apportion turns arranged side by side, obtaining in the first main transformer and the 3rd main transformer the main transformer needing turn main transformer of maintenance and non-required to turn maintenance, and obtaining the on off state of triple bus-bar segmentation transformer station according to switching command.

First control module 200, for when triple bus-bar segmentation transformer station meets the executive condition of switching command, controls to disconnect with needing turn step-down switch that the main transformer overhauled is connected.

Second control module 300, during for disconnecting successfully when the step-down switch be connected with the main transformer that needs turn overhaul, control needs turn the bus connection switch between main transformer and the second main transformer overhauled and close a floodgate.

3rd control module 400, for when triple bus-bar segmentation transformer station also meets load balancing controlled condition, judges whether the main transformer that the second main transformer and non-required turn maintenance meets paired running condition.

Wherein, load balancing controlled condition comprises the bus connection switch that the main transformer that turns maintenance with non-required is connected and is in "on" position, the switch that the main transformer turning maintenance with non-required is connected is in "on" position, and be in "on" position with needing turn step-down switch that the main transformer overhauled is disconnected in the second step-down switch and the 3rd step-down switch, it is identical with the wiring group that non-required turns the main transformer of maintenance that paired running condition comprises the second main transformer, the no-load voltage ratio difference that second main transformer and non-required turn the main transformer of maintenance is preset in error first, and second main transformer and the non-required short-circuit voltage difference that turns the main transformer of maintenance preset in error second.

Powered by the second main transformer because the bus corresponding at the main transformer needing to overhaul turns, the second main transformer overload may be caused, cause unsafe problems, follow-uply need that another bus in the second main transformer is turned the main transformer overhauled by non-required and power, carry out load balancing control.But, another bus in second main transformer turns the process that the main transformer that overhauled by non-required powers two kinds of modes, wherein a kind of be first merge the second main transformer and non-required maintenance main transformer between bus connection switch, again to be connected with the second main transformer and the step-down switch be connected with the main transformer that non-required is overhauled disconnects, but, if first merge bus connection switch, then the second main transformer and non-required turn the main transformer of maintenance is power side by side simultaneously, according to parallel operation of transformers condition, when two transformers are identical bussed supply side by side simultaneously, need these two transformer connection groups identical, the no-load voltage ratio that second main transformer and non-required turn the main transformer of maintenance is identical, allow the difference of ± 0.5%, the short-circuit voltage that second main transformer and non-required turn the main transformer of maintenance is identical, allow the difference of ± 10%.Thus, when meeting paired running condition, by the 4th control module 500 first merge the second main transformer and non-required maintenance main transformer between bus connection switch, again to be connected with the second main transformer and the disconnected step-down switch of the main transformer overhauled with needs disconnects, to be connected with the second main transformer and turn the disconnected bus of the main transformer that overhauls with needs and turn the main transformer turning maintenance by non-required and power, realize load balancing.When not meeting above-mentioned paired running condition, by the 4th control module 500 first to be connected with the second main transformer and the step-down switch be connected with the main transformer that non-required is overhauled disconnects, remerge the second main transformer and non-required maintenance main transformer between bus connection switch, to be connected with the second main transformer and turn the disconnected bus of the main transformer that overhauls with needs and turn the main transformer turning maintenance by non-required and power, realize load balancing.

4th control module 500, during for judging to meet paired running condition by the 3rd control module 400, bus connection switch between the main transformer second main transformer and non-required being turned maintenance closes a floodgate, disconnect again in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, when judging not meet paired running condition by the 3rd control module 400, disconnect in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, then the bus connection switch between the main transformer the second main transformer and non-required being turned maintenance closes a floodgate.

Due in triple bus-bar section wiring transformer station, when any main transformer maintenance in both sides, the bus that maintenance main transformer is corresponding converts middle main transformer to and powers, namely convert the second main transformer to power, then the second main transformer needs the load bearing two main transformers originally, and the second main transformer is just powered to two buses originally, easily causes the second main transformer overload.Controlling by adding load balancing, namely realizing by the 4th control module 500 object meeting balance, effectively avoiding load to concentrate on the situation of a main transformer, improving substation safety.

Above-mentioned triple bus-bar segmentation transformer station is turned the control system of paired running by apportion, when triple bus-bar segmentation transformer station meets the executive condition of switching command, control to disconnect with needing turn step-down switch that the main transformer overhauled is connected, successfully represent that main transformer needs being turned maintenance transfers inspecting state to when disconnecting, do not power, the bus connection switch controlled again between the main transformer of needs turn maintenance and the second main transformer closes a floodgate, bussed supply corresponding to main transformer utilizing the second main transformer to be maintenance, needs a bus for the main transformer turning maintenance to turn and is powered successfully by the second main transformer.But, now the load of the second main transformer may be overweight, need to carry out load balancing control, namely when triple bus-bar segmentation transformer station also meets load balancing controlled condition, judge whether the main transformer that the second main transformer and non-required turn maintenance meets paired running condition, when meeting, bus connection switch between the main transformer second main transformer and non-required being turned maintenance closes a floodgate, disconnect again in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, when not meeting, first disconnect in the second step-down switch and the 3rd step-down switch with need to turn the disconnected step-down switch of the main transformer that overhauls, again the bus connection switch be connected with the main transformer that non-required turns maintenance is closed a floodgate, alleviate the load of the second main transformer.By obtaining the state of each switch, only need carry out according to switching command and according to each on off state the switching that apportion turns paired running, without the need to carrying out the operation that apportion turns arranged side by side manually, judgement is got involved without the need to operating personnel, realize bus paired running, shorten the operating time while guaranteeing handling safety, client's interruption duration is dropped to minimum as far as possible, meet the index request to safety and reliability.And adopt and first disconnect and need to turn the step-down switch that the main transformer that overhauls is connected and remerge bus connection switch, in the transformer station that short circuit current exceeds standard, switch effectively can be avoided to break down the situation of exploding, ensure that power supply safety.In order to avoid the second main transformer overload, cause unsafe problems, after the bus that the main transformer needing to turn maintenance is corresponding is powered by the second main transformer, by be connected with the second main transformer and the bus connection switch be connected with the main transformer that non-required turns maintenance close, realize being connected with the second main transformer and the bus that the main transformer turning maintenance with non-required is connected turns the main transformer overhauled by non-required powers, alleviate the load of the second main transformer, realize load balancing, avoid the safety problem that the second main transformer overload causes, improve substation safety.

Wherein in an embodiment, the control system that above-mentioned triple bus-bar segmentation transformer station turns paired running by apportion also comprises:

Judge module, for judging whether be in separating brake with needing turn step-down on off state that the main transformer overhauled is connected, and whether be less than default first current threshold with needing a turn electric current for the step-down switch that the main transformer overhauled is connected, when being in separating brake with needing turn step-down on off state that the main transformer overhauled is connected, and with when needing a turn electric current for the step-down switch that the main transformer overhauled is connected to be less than default first current threshold, disconnect successfully with needing turn step-down switch that the main transformer overhauled is connected, otherwise, disconnect unsuccessfully with needing turn step-down switch that the main transformer overhauled is connected, prompting disconnects failure information.

Refer to Fig. 6, wherein in an embodiment, the second control module 300 comprises:

First control unit 310, for when with when needing turn step-down switch that the main transformer overhauled is connected to disconnect successfully, controls and needs turn mains switch that the bus that the main transformer overhauled is corresponding connects to disconnect.

Second control unit 320, the bus connection switch turned between the main transformer of maintenance and the second main transformer for controlling needs closes a floodgate, and closes a floodgate with needing turn mains switch that the bus that the main transformer overhauled is corresponding connects.

Refer to Fig. 7, wherein in an embodiment, the second control unit 320 comprises:

3rd control unit 321, for when with when needing the electric current turning the mains switch that bus corresponding to the main transformer that overhaul connects to be less than default second current threshold and the voltage that needs turn bus corresponding to the main transformer that overhaul is less than preset first threshold value, the bus connection switch of control needs turn between the main transformer overhauled and the second main transformer closes a floodgate;

4th control unit 322, for when needing the main transformer turning maintenance to be in "on" position with the bus connection switch between the second main transformer, the voltage of bus that needs the electric current of the bus connection switch turned between the main transformer that overhaul with the second main transformer to be greater than main transformer that default 3rd current threshold and needs turn overhaul is corresponding be greater than preset first threshold value time, the mains switch that the bus corresponding with the main transformer that needs turn overhaul connects is closed a floodgate.

Wherein in an embodiment, the 5th control module S600 comprises:

5th control unit, for disconnecting the step-down switch be connected with the main transformer that non-required turns maintenance in the second step-down switch and the 3rd step-down switch, and control the second step-down switch and disconnect with the mains switch that the step-down switch be connected with the main transformer that non-required turns maintenance in the 3rd step-down switch connects;

6th control unit, for the second main transformer and non-required are turned maintenance main transformer between bus connection switch close a floodgate, the second step-down switch controlling to disconnect closes a floodgate with the mains switch that the step-down switch be connected with the main transformer that non-required turns maintenance in the 3rd step-down switch connects.

Each technical characteristic of above embodiment can combine arbitrarily, for making description succinct, all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.

Above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims

1. triple bus-bar segmentation transformer station is turned a control method for paired running by apportion, it is characterized in that, comprises the following steps:

2. triple bus-bar segmentation transformer station according to claim 1 is turned the control method of paired running by apportion, it is characterized in that, the executive condition of described switching command also comprises voltage that described needs turn bus corresponding to the main transformer of maintenance and is greater than preset first threshold value and connects with described second main transformer and the voltage turning the bus that bus corresponding to the main transformer of maintenance is connected with described needs is greater than default Second Threshold, described load balancing controlled condition also comprises described second bus and is greater than default 3rd threshold value with the busbar voltage be connected with the main transformer that described non-required turns maintenance in described triple bus-bar and the busbar voltage be connected with the main transformer that described non-required turns maintenance in described first bus and described 4th bus is greater than default 4th threshold value.

3. triple bus-bar segmentation transformer station according to claim 1 is turned the control method of paired running by apportion, it is characterized in that, when the described step-down switch when being connected with the main transformer that described needs turn maintenance disconnects successfully, control also to comprise before described needs turn the step that the bus connection switch between the main transformer of maintenance and described second main transformer closes a floodgate:

Judge whether the step-down on off state be connected with the main transformer that described needs turn maintenance is in separating brake, and whether the electric current of the step-down switch be connected with the main transformer that described needs turn maintenance is less than default first current threshold;

When the step-down on off state be connected with the main transformer that described needs turn maintenance is in separating brake, and the electric current of the step-down switch be connected with the main transformer that described needs turn maintenance is when being less than default first current threshold, the step-down switch that the main transformer turning maintenance with described needs is connected disconnects successfully, otherwise, the step-down switch that the main transformer turning maintenance with described needs is connected disconnects unsuccessfully, and prompting disconnects failure information.

4. triple bus-bar segmentation transformer station according to claim 1 is turned the control method of paired running by apportion, it is characterized in that, when the described step-down switch when being connected with the main transformer that described needs turn maintenance disconnecting successfully, controlling described needs and turning the step that the bus connection switch between the main transformer of maintenance and described second main transformer closes a floodgate and specifically comprise:

When the step-down switch be connected with the main transformer that described needs turn maintenance disconnects successfully, to control and described needs turn the mains switch that bus corresponding to the main transformer of maintenance connect and disconnect;

Control the bus connection switch that described needs turn between the main transformer of maintenance and described second main transformer to close a floodgate, and close a floodgate turning with described needs the mains switch that bus corresponding to the main transformer of maintenance connect.

5. triple bus-bar segmentation transformer station according to claim 4 is turned the control method of paired running by apportion, it is characterized in that, the bus connection switch that the described needs of described control turn between the main transformer of maintenance and described second main transformer closes a floodgate, and comprises turning with described needs the step that mains switch that bus corresponding to the main transformer of maintenance connect closes a floodgate:

When being less than default second current threshold with the electric current that described needs turn the mains switch that bus corresponding to the main transformer of maintenance connects and the voltage that described needs turn bus corresponding to the main transformer of maintenance is less than preset first threshold value, controlling the bus connection switch that described needs turn between the main transformer of maintenance and described second main transformer and closing a floodgate;

When the electric current of the bus connection switch that described needs turn between the main transformer of maintenance is in "on" position with the bus connection switch between described second main transformer, described needs turn maintenance main transformer with described second main transformer be greater than voltage that default 3rd current threshold and described needs turn bus corresponding to the main transformer of maintenance be greater than described preset first threshold value time, close a floodgate turning with described needs the mains switch that bus corresponding to the main transformer of maintenance connect.

6. triple bus-bar segmentation transformer station is turned a control system for paired running by apportion, it is characterized in that, comprising:

7. triple bus-bar segmentation transformer station according to claim 6 is turned the control system of paired running by apportion, it is characterized in that, the executive condition of described switching command also comprises voltage that described needs turn bus corresponding to the main transformer of maintenance and is greater than preset first threshold value and connects with described second main transformer and the voltage turning the bus that bus corresponding to the main transformer of maintenance is connected with described needs is greater than default Second Threshold, described load balancing controlled condition also comprises described second bus and is greater than default 3rd threshold value with the busbar voltage be connected with the main transformer that described non-required turns maintenance in described triple bus-bar and the busbar voltage be connected with the main transformer that described non-required turns maintenance in described first bus and described 4th bus is greater than default 4th threshold value.

8. triple bus-bar segmentation transformer station according to claim 6 is turned the control system of paired running by apportion, it is characterized in that, also comprises:

Judge module, for judging whether the step-down on off state that the main transformer turning maintenance with described needs is connected is in separating brake, and whether the electric current of the step-down switch be connected with the main transformer that described needs turn maintenance is less than default first current threshold, when the step-down on off state be connected with the main transformer that described needs turn maintenance is in separating brake, and the electric current of the step-down switch be connected with the main transformer that described needs turn maintenance is when being less than default first current threshold, the step-down switch that the main transformer turning maintenance with described needs is connected disconnects successfully, otherwise, the step-down switch that the main transformer turning maintenance with described needs is connected disconnects unsuccessfully, prompting disconnects failure information.

9. triple bus-bar segmentation transformer station according to claim 6 is turned the control system of paired running by apportion, it is characterized in that, described second control module comprises:

First control unit, during for disconnecting successfully when the step-down switch be connected with the main transformer that described needs turn maintenance, to control and described needs turn the mains switch that bus corresponding to the main transformer of maintenance connect and disconnect;

Second control unit, the bus connection switch turned between the main transformer of maintenance and described second main transformer for controlling described needs closes a floodgate, and closes a floodgate turning with described needs the mains switch that bus corresponding to the main transformer of maintenance connect.

10. triple bus-bar segmentation transformer station according to claim 9 is turned the control system of paired running by apportion, it is characterized in that, described second control unit comprises:

3rd control unit, for when being less than default second current threshold with the electric current that described needs turn the mains switch that bus corresponding to the main transformer of maintenance connects and the voltage that described needs turn bus corresponding to the main transformer of maintenance is less than preset first threshold value, controlling the bus connection switch that described needs turn between the main transformer of maintenance and described second main transformer and closing a floodgate;

4th control unit, electric current for turning the bus connection switch between the main transformer of maintenance is in "on" position with the bus connection switch between described second main transformer, described needs turn maintenance main transformer with described second main transformer when described needs is greater than voltage that default 3rd current threshold and described needs turn bus corresponding to the main transformer of maintenance when being greater than described preset first threshold value, closes a floodgate turning with described needs the mains switch that bus corresponding to the main transformer of maintenance connect.