CN101552489B

CN101552489B - Method for controlling automatic operation of standby power by microcomputer of inner bridge and single bus connection

Info

Publication number: CN101552489B
Application number: CN2008102435657A
Authority: CN
Inventors: 汤大海
Original assignee: Zhenjiang Power Supply Co of Jiangsu Electric Power Co
Current assignee: State Grid Corp of China SGCC; State Grid Jiangsu Electric Power Co Ltd; Zhenjiang Power Supply Co of Jiangsu Electric Power Co
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2011-06-15
Anticipated expiration: 2028-12-23
Also published as: CN101552489A

Abstract

The invention belongs to control technology of electric power transmission and distribution, and relates to a method for controlling the automatic operation of standby power by using a microcomputer. The method includes two basic control methods which are the inner bridge connection or single bus sectional connection control method and the single bus connection control method, wherein the inner bridge connection or single bus sectional connection control method comprises the following control processes of: tripping control of a first breaker 1DL, tripping control of a second breaker 2DL, switching-on charge and discharge control of the first breaker 1DL, switching-on control of the first breaker 1DL, switching-on charge and discharge control of the second breaker 2DL, switching-on control of the second breaker 2DL, switching-on charge and discharge control of a third breaker 3DL, switching-on control of the third breaker 3DL, and abnormal signal control. The method has simple action principle and high reliability, is completely in accordance with the fundamental principle of the automatic operation of the standby power, and is applicable to the one-time main connection of electric power substations in three forms of inner bridge connection, single bus sectional connection and single bus connection, in the power transmission and distribution network.

Description

The method that the microcomputer control standby power of interior bridge and single bus scheme drops into automatically

Technical field

The invention belongs to the control technology of electric power transmission ﹠ distribution, relate to a kind of method that drops into automatically with microcomputer control standby power.

Background technology

At present, the automatic throw-in equipment of emergency power supply of electric substation operation has two kinds of electromagnetic type and microcomputer types.The automatic throw-in equipment of emergency power supply of electromagnetic type since need by a large amount of machineries such as relay, electric to stand-by power supply automatically the input process control, it takes up room greatly, equipment cost is high, troublesome maintenance, difficult realization Long-distance Control.And the microcomputer control standby power automatic throw-in equipment by microcomputor program to stand-by power supply automatically the input process control, its cost is low, be easy to realize Long-distance Control.But existing microcomputer control standby power

The control method great majority that automatic throw-in equipment adopted are to design according to the motion flow that people propose, not in full conformity with the automatic basic principle that drops into of stand-by power supply, compare with the equipment of electromagnetic type, its operating principle complexity, operational mode limitation are big, have lost the due advantage of microcomputer type prepared auto restart on the contrary.Particularly existing microcomputer control standby power automatic throw-in equipment is being connected under the occasion of local power plant; its adaptive capacity is poor; because the protection locking does not separate; when a main transformer breaks down; the action that stand-by power supply drops into automatically may be all by locking; when a line two becomes operation, will cause full electric substation dead electricity, thereby its operational reliability can not get guaranteeing.Though proposed the scheme of a fairly perfect internal bridge automatically in " novel microcomputer control standby power drop into method ", a logical circuit still of no use is finished and is adapted to the technical scheme that comprises the automatic throw-in equipment of emergency power supply of internal bridge, single-trunk segmental wiring and single bus scheme in main electrical scheme of electric substation of applied transmission and distribution networks.

Summary of the invention

Problem to be solved by this invention is, provide that a kind of operating principle is simple, reliability is high method, make it meet the basic principle that stand-by power supply drops into automatically fully, and can adapt to the automatic method that drops into of microcomputer control standby power of this main electrical scheme of three kinds of electric substations of internal bridge in the transmission and distribution networks, single-trunk segmental wiring and single bus scheme.

Provide the technical scheme of the inventive method below.

At the applied transmission and distribution networks of method of the present invention is internal bridge, single-trunk segmental wiring and single bus scheme network in main electrical scheme of 110kV and following electric pressure electric substation.

Said internal bridge is meant: include the two-way power supply in main electrical scheme of electric substation of transmission and distribution networks, be serially connected with the first circuit breaker 1DL and the second circuit breaker 2DL on the two-way power supply respectively, also connect two main transformers (i.e. first main transformer and second main transformer) respectively, the 3rd circuit breaker 3DL is arranged between the two-way power supply, and the line side of electric power incoming line and transformer side all are connected to voltage transformer.

Said single-trunk segmental wiring is meant: include the two-way electric power incoming line in main electrical scheme of electric substation of transmission and distribution networks, be serially connected with the first circuit breaker 1DL and the second circuit breaker 2DL on the two-way electric power incoming line respectively, be connected to two buses (bus and No. two buses) again, article two, bus also can connect two main transformers (i.e. first main transformer and second main transformer) respectively or be connected with the load outlet respectively, the 3rd circuit breaker 3DL is arranged between two buses, all be connected to voltage transformer on the line side of two-way electric power incoming line and two buses.

Said single bus scheme is meant: include the two-way electric power incoming line in main electrical scheme of electric substation of transmission and distribution networks, be serially connected with the first circuit breaker 1DL and the second circuit breaker 2DL on the two-way electric power incoming line respectively, be connected to again (bus and No. two buses) on two buses, also can connect two main transformers (i.e. first main transformer and second main transformer) on the bus respectively or be connected with the load outlet, all be connected to voltage transformer on the line side of two-way electric power incoming line and the bus.

Method of the present invention comprises the control method of internal bridge or single-trunk segmental wiring and these two kinds of basic control methods of control method of single bus scheme, wherein,

The control method of described internal bridge or single-trunk segmental wiring is: when operational mode is an internal bridge or during for single-trunk segmental wiring, " primary connection mode control word " KG3 is changed to 1; When an operational mode was internal bridge, setting 1BCJ was that first main transformer protection, 2BCJ are second main transformer protection; When an operational mode was single-trunk segmental wiring, setting 1BCJ was that bus protection, a 2BCJ are No. two bus protections; Specifically comprise following control procedure,

The tripping operation control of the control procedure A. first circuit breaker 1DL, promptly

When these several conditions of position satisfy simultaneously when the first circuit breaker 1DL source current 1I1 does not have stream definite value, the first circuit breaker 1DL supply voltage 1U1 and has the two-position relay 1KKJ of compression set value and the first circuit breaker 1DL hand control switch 1KK or its deciliter state to be in less than the no compression set value of separating brake inspection, the second circuit breaker 2DL supply voltage 2U1 greater than the separating brake inspection to close a floodgate less than separating brake inspection after, through certain time-delay tT1, to first circuit breaker 1DL tripping operation control loop output pulse control signal, make first circuit breaker 1DL tripping operation, export stand-by power supply input tripping operation actuating signal simultaneously.

The tripping operation control of the control procedure B. second circuit breaker 2DL, promptly

When these several conditions of position satisfy simultaneously when the second circuit breaker 2DL source current 2I1 does not have stream definite value, 2DL supply voltage 2U1 and has the two-position relay 2KKJ of compression set value and 2DL hand control switch 2KK or its deciliter state to be in less than the no compression set value of separating brake inspection, the first circuit breaker 1DL supply voltage 1U1 greater than the separating brake inspection to close a floodgate less than separating brake inspection after, through certain time-delay tT2, to 2DL tripping operation control loop output pulse control signal, make second circuit breaker 2DL tripping operation, export stand-by power supply input tripping operation actuating signal simultaneously.

The control procedure C. first circuit breaker 1DL closes a floodgate and discharges and recharges control, promptly

Condition a. discharging condition one

When the two-position relay 1KKJ of the hand control switch 1KK of the first circuit breaker 1DL or its deciliter state be in close a floodgate after the position;

Position after the two-position relay 2KKJ of the hand control switch 2KK of the second circuit breaker 2DL or its deciliter state is in separating brake;

When first main transformer protection or a bus protection 1BCJ action;

When the first circuit breaker 1DL sends the combined floodgate control command;

Condition b. charge condition one

When the two-position relay 2KKJ of the L hand control switch 2KK of the second circuit breaker 2D or its deciliter state be in close a floodgate after the position;

Position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in separating brake;

When the separating brake position relay 1TWJ of first circuit breaker 1DL action.

When above-mentioned arbitrary charge condition one satisfies and arbitrary discharging condition one when not satisfying, the first circuit breaker 1DL finishes the charging control of closing a floodgate after charging time-delay (delay time is 1Tcd1, can be made as 20 seconds).

Condition c. discharging condition two

Position after the two-position relay 3KKJ of the hand control switch 3KK of the 3rd circuit breaker 3DL or its deciliter state is in separating brake;

When first main transformer protection or a bus protection 1BCJ action;

Condition d. charge condition two

Position after the two-position relay 3KKJ of the 3rd circuit breaker 3DL hand control switch 3KK or its deciliter state is in combined floodgate;

When the separating brake position relay 1TWJ of first circuit breaker 1DL action;

Primary connection mode control word KG3 is 1.

When above-mentioned arbitrary charge condition two satisfies and arbitrary discharging condition two when not satisfying, the first circuit breaker 1DL finishes the charging control of closing a floodgate after charging time-delay (delay time is 2Tcd1, can be made as 20 seconds).

The control procedure D. first circuit breaker 1DL control of closing a floodgate, promptly

The condition a. first circuit breaker 1DL combined floodgate controlled condition one:

When really tripping of the second circuit breaker 2DL has been sent and checked to second circuit breaker 2DL tripping operation control command; Or when the first circuit breaker 1DL power supply main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in and closes a floodgate simultaneously and the second circuit breaker 2DL is in separating brake position (promptly the second circuit breaker 2DL position is not corresponding);

The charging delay time arrives;

First main transformer protection or a not action of bus protection;

When above condition satisfies, output pulse control signal to the first circuit breaker 1DL combined floodgate control loop after time-delay (delay time is tH1), the first circuit breaker 1DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal.

The condition b. first circuit breaker 1DL combined floodgate controlled condition two:

When the first circuit breaker 1DL power supply main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 3KKJ of the 3rd circuit breaker 3DL hand control switch 3KK or its deciliter state is in and closes a floodgate simultaneously and the 3rd circuit breaker 3DL is in separating brake position (being that the 3DL circuit breaker position is not corresponding);

The charging delay time arrives;

First main transformer protection or a not action of bus protection;

When above condition all satisfies, after time-delay (delay time is tH1), export pulse control signal to the first circuit breaker 1DL combined floodgate control loop equally, the first circuit breaker 1DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal.

The control procedure E. second circuit breaker 2DL closes a floodgate and discharges and recharges control, promptly

Condition a. discharging condition one

When the two-position relay 2KKJ of the hand control switch 2KK of the second circuit breaker 2DL or its deciliter state be in close a floodgate after the position;

Position after the two-position relay 1KKJ of the hand control switch 1KK of the first circuit breaker 1DL or its deciliter state is in separating brake;

When second main transformer protection or No. two bus protection 2BCJ actions;

When the second circuit breaker 2DL sends the combined floodgate control command;

Condition b. charge condition one

Position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in combined floodgate;

Position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in separating brake;

When the separating brake position relay 2TWJ of second circuit breaker 2DL action.

When above-mentioned arbitrary charge condition one satisfies and arbitrary discharging condition one when not satisfying, the second circuit breaker 2DL finishes the charging control of closing a floodgate after charging time-delay (delay time is 2Tcd1, can be made as 20 seconds).

Condition c. discharging condition two

Position after the two-position relay 3KKJ of 3DL hand control switch 3KK or its deciliter state is in separating brake;

When second main transformer protection (or No. two bus protections) 2BCJ action;

Condition d. charge condition two

When the separating brake position relay 2TWJ of second circuit breaker 2DL action;

Primary connection mode control word KG3 is 1;

When above-mentioned arbitrary charge condition two satisfies and arbitrary discharging condition two when not satisfying, the second circuit breaker 2DL finishes the charging control of closing a floodgate after charging time-delay (delay time is 2Tcd2, can be made as 20 seconds).

The control procedure F. second circuit breaker 2DL control of closing a floodgate, promptly

The condition a. second circuit breaker 2DL combined floodgate controlled condition one

When really tripping of the first circuit breaker 1DL has been sent and checked to first circuit breaker 1DL tripping operation control command; Or when the second circuit breaker 2DL power supply main transformer high side voltage (or No. two busbar voltages) less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in and closes a floodgate simultaneously and the first circuit breaker 1DL is in separating brake position (promptly the first circuit breaker 1DL position is not corresponding);

2Tcd1 charging delay time arrives;

Second main transformer protection or No. two not actions of bus protection;

When above condition satisfies, output pulse control signal to the second circuit breaker 2DL combined floodgate control loop after time-delay (delay time is tH2), the second circuit breaker 2DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal.

The condition b. second circuit breaker 2DL combined floodgate controlled condition two:

When the second circuit breaker 2DL power supply main transformer high side voltage (or No. two busbar voltages) less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 3KKJ of 3DL hand control switch 3KK or its deciliter state is in and closes a floodgate simultaneously and circuit breaker 3DL is in separating brake position (being that the 3DL circuit breaker position is not corresponding);

2Tcd2 charging delay time arrives;

Second main transformer protection or No. two not actions of bus protection;

When above condition all satisfies, after time-delay (delay time is tH2), export pulse control signal to the second circuit breaker 2DL combined floodgate control loop equally, the second circuit breaker 2DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal.

Control procedure G. the 3rd circuit breaker 3DL closes a floodgate and discharges and recharges control, promptly

Condition a. discharging condition one

When the two-position relay 3KKJ of the hand control switch 3KK of 3DL or its deciliter state be in close a floodgate after the position;

When first main transformer protection or a bus protection 1BCJ action;

When circuit breaker 3DL sends the combined floodgate control command;

Condition b. charge condition one

When the separating brake position relay 3TWJ of 3DL action.

Primary connection mode control word KG3 is 1.

When above-mentioned arbitrary charge condition one satisfies and arbitrary discharging condition one when not satisfying, the 3DL circuit breaker is finished the charging control of closing a floodgate after charging time-delay (delay time is 3Tcd1, can be made as 20 seconds).

Condition c. discharging condition two

When second main transformer protection or No. two bus protection 2BCJ actions;

When circuit breaker 3DL sends the combined floodgate control command;

Condition d. charge condition two

Position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in combined floodgate;

When the separating brake position relay 3TWJ of 3DL action;

Primary connection mode control word KG3 is 1.

When above-mentioned arbitrary charge condition two satisfies and arbitrary discharging condition two when not satisfying, the 3DL circuit breaker is finished the charging control of closing a floodgate after charging time-delay (delay time is 3Tcd2, can be made as 20 seconds)

Control procedure H. the 3rd circuit breaker 3DL control of closing a floodgate, promptly

Condition a. the 3rd circuit breaker 3DL combined floodgate controlled condition one

When really tripping of the first circuit breaker 1DL has been sent and checked to first circuit breaker 1DL tripping operation control command; Or when the first circuit breaker 1DL power supply main transformer high side voltage (or a busbar voltage) less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in and closes a floodgate simultaneously and circuit breaker 1DL is in separating brake position (promptly the first circuit breaker 1DL position is not corresponding);

3Tcd1 charging delay time arrives;

First main transformer protection (or a bus protection) is action not;

When above condition satisfied, to the 3DL control loop that closes a floodgate, the 3DL breaker closing was exported stand-by power supply input feed motion signal simultaneously through time-delay (delay time is tH3) back output pulse control signal.

Condition b. the 3rd circuit breaker 3DL combined floodgate controlled condition two:

When really tripping of the second circuit breaker 2DL has been sent and checked to second circuit breaker 2DL tripping operation control command; Or when the second circuit breaker 2DL power supply main transformer high side voltage (or No. two busbar voltages) less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in and closes a floodgate simultaneously and the second circuit breaker 2DL is in separating brake position (promptly the second circuit breaker 2DL position is not corresponding);

3Tcd2 charging delay time arrives;

Second main transformer protection (or No. two bus protections) is action not;

When above condition all satisfies, equally through time-delay (delay time is tH3) back output pulse control signal to the 3DL control loop that closes a floodgate, the 3DL breaker closing is exported stand-by power supply input feed motion signal simultaneously.

The control of control procedure I. abnormal signal

When the first main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate (do not have press when indicating that KG2 is 1 in the inspection of closing a floodgate), or second main transformer high side voltage or No. two busbar voltages less than the no compression set value of inspection of closing a floodgate (inspection of closing a floodgate do not have to press indicate that KG2 is at 1 o'clock), after certain time-delay, send abnormal signal;

When the first circuit breaker 1DL does not send the tripping operation control command, and the first circuit breaker 1DL source current I1 less than separating brake inspection do not have stream definite value or the first circuit breaker 1DL supply voltage U1 less than the two-position relay 1KKJ of separating brake the no compression set value of inspection and the first circuit breaker 1DL hand control switch 1KK or its deciliter state be in close a floodgate after during the position, after certain time-delay, send abnormal signal;

When the second circuit breaker 2DL does not send the tripping operation control command, and the second circuit breaker 2DL source current I2 less than separating brake inspection do not have stream definite value or the second circuit breaker 2DL supply voltage U2 less than the two-position relay 2KKJ of separating brake the no compression set value of inspection and the second circuit breaker 2DL hand control switch 2KK or its deciliter state be in close a floodgate after during the position, after certain time-delay, send abnormal signal.

The control method of described single bus scheme is:When an operational mode is single bus scheme, " primary connection mode control word " KG3 is changed to 0 (the charging timing circuit 2Tcd2 of charging timing circuit 1Tcd2, the second circuit breaker 2DL of the first circuit breaker 1DL and charging timing circuit 3Tcd1, the 3Tcd2 of the 3rd circuit breaker 3DL all can not be charged by locking at this moment, and corresponding closing circuit is all by locking); 1BCJ, 2BCJ all are set at bus protection; A bus inspection does not have and presses and No. two bus inspections do not have pressure and are the bus inspection and do not have pressure; Specifically comprise following control procedure,

When the second circuit breaker 2DL source current 2I1 does not have the stream definite value less than the separating brake inspection, the second circuit breaker 2DL supply voltage 2U1 is less than the no compression set value of separating brake inspection, when the first circuit breaker 1DL supply voltage 2U1 has the two-position relay 2KKJ of compression set value and the second circuit breaker 2DL hand control switch 2KK or its deciliter state to be in to close a floodgate these several conditions of position, back to satisfy simultaneously greater than separating brake inspection, through certain time-delay tT2, to second circuit breaker 2DL tripping operation control loop output pulse control signal, make second circuit breaker, second circuit breaker 2DL tripping operation, export stand-by power supply input tripping operation actuating signal simultaneously.

Condition a. discharging condition

When bus protection 1BCJ action;

Condition b. charge condition

When above-mentioned arbitrary charge condition satisfies and arbitrary discharging condition when not satisfying, the first circuit breaker 1DL finishes the charging control of closing a floodgate after charging time-delay (delay time is 1Tcd1, can be made as 20 seconds).

The first circuit breaker 1DL combined floodgate controlled condition

When really tripping of the second circuit breaker 2DL has been sent and checked to second circuit breaker 2DL tripping operation control command; Or when busbar voltage less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in and closes a floodgate simultaneously and the second circuit breaker 2DL is in separating brake position (promptly the second circuit breaker 2DL position is not corresponding);

1Tcd1 charging delay time arrives;

Bus protection is action not;

Condition a. discharging condition

When bus protection 2BCJ action;

Condition b. charge condition

When above-mentioned arbitrary charge condition satisfies and arbitrary discharging condition when not satisfying, the second circuit breaker 2DL finishes the charging control of closing a floodgate after charging time-delay (delay time is 2Tcd1, can be made as 20 seconds).

The second circuit breaker 2DL combined floodgate controlled condition:

When really tripping of the first circuit breaker 1DL has been sent and checked to first circuit breaker 1DL tripping operation control command; Or when busbar voltage less than the no compression set value of inspection of closing a floodgate (when the inspection of closing a floodgate does not have the sign of pressure KG2 and is 1), position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in and closes a floodgate simultaneously and the first circuit breaker 1DL is in separating brake position (promptly the first circuit breaker 1DL position is not corresponding);

2Tcd1 charging delay time arrives;

Bus protection is action not;

The control of control procedure G. abnormal signal, promptly

The method that microcomputer control standby power of the present invention drops into automatically meets the basic principle that stand-by power supply drops into automatically fully, compares with employed method in the existing microcomputer type automatic throw-in equipment of emergency power supply, has following advantage:

1. adopted a logical circuit to finish and adapt to the technical scheme of the automatic throw-in equipment of emergency power supply of the three kinds of electric substations main electrical scheme that comprises internal bridge, single-trunk segmental wiring and single bus scheme in main electrical scheme of electric substation of applied transmission and distribution networks.

2. adopted by the switch of power supply (or losing power supply) and finished the charging and discharging circuit controlling schemes, had when combined floodgate inspection nothing equally and press advantage easily;

3. adopt the not corresponding startup loop of similar reclosing equally, start one of loop as prepared auto restart, has clear and definite, simple, the reliable advantage of operating criterion, and can correct switch and steal jumping, the switch of need not setting up defences is in addition stolen the correction loop of jumping, and has fundamentally solved the insurmountable interior bridge switch of other microcomputer type backup auto-activating devices or electromagnetic type backup auto-activating device and has stolen the jumping problem;

4. adopted and started the prepared auto restart closing circuit when jumping the switch of power supply by the loop start of checking the power supply dead electricity, start two of loop as prepared auto restart, can be used as not corresponding startup loop and start replenishing of loop, make the startup of prepared auto restart more reliable as prepared auto restart;

5. check no pressure scheme when having adopted combined floodgate, solved when the electric substation that moves and when local power plant is arranged, prevent the problem of non-Switching Synchronization;

6. the scheme that has adopted main transformer protection action or the corresponding main transformer switch of bus protection action locking to close a floodgate equally; prevent in two main transformers of a circuit band or circuit band two a buses operation; and another circuit is when making stand-by power supply; when this side main transformer of circuit or bus break down; since in the time of this main transformer protection or bus action tripping respective switch locking the combined floodgate of prepared auto restart, and cause full institute of this electric substation dead electricity (promptly protecting half principle).

7. at internal bridge or single-trunk segmental wiring, under the two-way incoming power throwing mode mutually, when the main transformer of appearance power supply or busbar fault, this programme has two startup loops of closing a floodgate to start closing circuit, has guaranteed the reliability of automatic closing.

Description of drawings

Fig. 1 is the schematic diagram that a suitable main electrical scheme of the automatic input of stand-by power supply is the internal bridge of standard;

Fig. 2 is the schematic diagram that a suitable main electrical scheme of the automatic input of stand-by power supply is a single-trunk segmental wiring;

Fig. 3 is the schematic diagram that a suitable main electrical scheme of the automatic input of stand-by power supply is a single bus scheme;

Fig. 4 is the logic diagram of the inventive method.

Control word among Fig. 4 is described as follows:

The control word title	Control word is 1 o'clock	Control word is 0 o'clock
			The separating brake inspection has pressure-controlled word KG1	The separating brake inspection has the compression functions input	The separating brake inspection has compression functions to withdraw from
The no pressure-controlled word KG2 of inspection closes a floodgate	Close a floodgate and examine no compression functions input	The no compression functions of inspection that closes a floodgate withdraws from
			Primary connection mode control word KG3	The primary connection mode is internal bridge or single-trunk segmental wiring	The primary connection mode is a single bus scheme

Letter is described as follows among Fig. 4:

＜1I1-represents that circuit breaker 1DL source current does not have the stream definite value less than the separating brake inspection, and promptly 1DL does not have stream;

＜1U1-represents circuit breaker 1DL supply voltage less than the no compression set value of separating brake inspection, and promptly 1DL does not have pressure;

2U1-represents that circuit breaker 2DL supply voltage has the compression set value greater than separating brake inspection, promptly 2DL has pressure;

＜2I1-represents that circuit breaker 2DL source current does not have the stream definite value less than the separating brake inspection, and promptly 2DL does not have stream;

＜2U1-represents circuit breaker 2DL supply voltage less than the no compression set value of separating brake inspection, and promptly 2DL does not have pressure;

1U1-represents that circuit breaker 1DL supply voltage has the compression set value greater than separating brake inspection, promptly 1DL has pressure;

＜1U2-represents that the first main transformer high side voltage (or a busbar voltage) is less than the no compression set value of inspection of closing a floodgate;

＜2U2-represents that the second main transformer high side voltage (or No. two busbar voltages) is less than the no compression set value of inspection of closing a floodgate;

1KKJ-represents that the two-position relay of 1DL hand control switch 1KK or its deciliter state is in the position, back of closing a floodgate;

2KKJ-represents that the two-position relay of 2DL hand control switch 2KK or its deciliter state is in the position, back of closing a floodgate;

3KKJ-represents that the two-position relay of 3DL hand control switch 3KK or its deciliter state is in the position, back of closing a floodgate;

1TWJ-represents that circuit breaker 1DL is in the separating brake position;

2TWJ-represents that circuit breaker 2DL is in the separating brake position;

3TWJ-represents that circuit breaker 3DL is in the separating brake position;

1BCJ-represents first main transformer depressor protection (or a bus protection or bus protection) action;

2BCJ-represents second main transformer depressor protection (or No. two bus protection or bus protection) action;

Symbol description is as follows among Fig. 4:

-presentation logic and relation, when promptly initial conditions all satisfied, output was effectively;

-presentation logic or relation, promptly initial conditions is arbitrary when satisfying, and output is effectively;

-expression delay tripping the time;

-expression time-delay 20 seconds;

-expression charging delay time;

-expression time-delay closing time;

-expression 200ms pulse output;

-expression 1DL trip(ping) circuit;

-expression 2DL trip(ping) circuit;

-expression 1DL closing circuit;

-expression 2DL closing circuit;

-expression 3DL closing circuit;

-expression prepared auto restart tripping operation actuating signal;

-expression prepared auto restart feed motion signal;

-be expressed as opposite with input signal;

-expression abnormal signal;

Embodiment

(1), internal bridge or single-trunk segmental wiring embodiment

As Fig. 1 or shown in Figure 2, include the two-way power supply in the applied transmission and distribution networks of method of the present invention, be serially connected with circuit breaker 1DL and circuit breaker 2DL on the two-way power supply respectively, also connect two main transformers (i.e. first main transformer and second main transformer) or two buses (bus has two main transformers or load outlet) respectively, circuit breaker 3DL is arranged between the two-way power supply, be internal bridge or single-trunk segmental wiring, have the line side of voltage transformer and electric power incoming line that voltage transformer is also arranged on main transformer high-pressure side or the bus.Provide the embodiment that is applied to various internal bridges that stand-by power supply automatically drops into or single-trunk segmental wiring form (primary connection mode control word " KG3 be changed to 1) of the inventive method below:

1, throws interior bridge or block switch 3DL:1*2 mode

1.1 the preparatory stage

Circuit breaker 1DL, 2DL are the combined floodgate running status, and its corresponding console switch 1KK, 2KK (or two-position relay 1KKJ, 2KKJ) memory is for after closing a floodgate, and 3DL is a stand-by heat, after its corresponding console switch 3KK (or two-position relay 3KKJ) memory is separating brake.Because 1KK, 2KK are the back state that closes a floodgate, so 1DL, 2DL trip(ping) circuit are open, and the closing circuit locking; Open simultaneously 3DL combined floodgate charge circuit 3Tcd1 and 3Tcd2 then charge when 3DL satisfies charge condition, and charging again behind the charge condition is satisfied in then thoroughly discharge immediately when not satisfying condition.

1.2 course of action

1.2.11DL power supply dead electricity

(1) because 1DL power supply dead electricity, through the 1DL inspection do not have press and do not have stream, offside 2DL power supply pressure is arranged after, 1DL trips behind the tT1 that delays time.When first circuit breaker 1DL tripping operation control command has been sent the 1DL tripping operation and check the first circuit breaker 1DL really the closed expression of tripping or 1DL tripping operation back 1TWJ 1DL be in trip position, and 1KKJ is for closing a floodgate the back state, thereby the generation 1DL position of the switch is not corresponding, after 3DL combined floodgate charge circuit 3Tcd1 charging was finished, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(2) if 1DL power supply dead electricity causes that by first main transformer protection (or a bus protection) action then 3DL charge circuit 3Tcd1 discharges immediately, and locking 3DL closing circuit, to guarantee 2DL power supply normal power supply.

(3) if stealing to jump because of switch, 1DL power supply dead electricity causes, then 1TWJ can be closed, and 1KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 1DL position of the switch equally, after first main transformer (or a bus) did not have pressure on inspection, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(4) if manually draw back 1DL, then 1KKJ becomes state behind the separating brake by original combined floodgates back state, and the position of the switch of 1DL is not corresponding is false, thus can not start the closing circuit of 3DL, and the 3DL charge circuit 3Tcd1 that closes a floodgate is thoroughly discharged immediately.

1.2.22DL power supply dead electricity

(1) because 2DL power supply dead electricity, through the 2DL inspection do not have press and do not have stream, offside 1DL power supply pressure is arranged after, 2DL trips behind the tT2 that delays time.When second circuit breaker 2DL tripping operation control command has been sent the 2DL tripping operation and check the second circuit breaker 2DL really the closed expression of tripping or 2DL tripping operation back 2TWJ 2DL be in trip position, and 2KKJ is for closing a floodgate the back state, thereby the generation 2DL position of the switch is not corresponding, after 3DL combined floodgate charge circuit 3Tcd2 charging was finished, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(2) if 2DL power supply dead electricity causes that by second main transformer protection (or No. two bus protections) action then 3DL charge circuit 3Tcd2 discharges immediately, and locking 3DL closing circuit, to guarantee 1DL power supply normal power supply.

(3) if stealing to jump because of switch, 2DL power supply dead electricity causes, then 2TWJ can be closed, and 2KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 2DL position of the switch equally, after second main transformer (or No. two buses) did not have pressure on inspection, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(4) if manually draw back 2DL, then 2KKJ becomes state behind the separating brake by original combined floodgates back state, and the position of the switch of 2DL is not corresponding is false, thus can not start the closing circuit of 3DL, and the 3DL charge circuit 3Tcd2 that closes a floodgate is thoroughly discharged immediately.

2, incoming power switch 1DL, 2DL throw mutually: the 2*2 mode

2.1 the preparatory stage

1DL (or 2DL), 3DL are the combined floodgate running status, its corresponding console switch 1KK (or 2KK), 3KK (or two-position relay) memory is for after closing a floodgate, 2DL (or 1DL) is a stand-by heat, after its corresponding console switch 2KK (or 1KK) or two-position relay memory are separating brake.Because 1KK (or 2KK), 3KK are the back state that closes a floodgate, so the corresponding trip(ping) circuit of 1DL (2DL), 3DL is open, and the closing circuit locking; Open simultaneously 2DL combined floodgate charge circuit 2T cd1 and 2T cd2 (or 1DL combined floodgate charge circuit 1T cd1 and 1T cd2), when 2DL (or 1DL) then charges when satisfying charge condition, charging again behind the charge condition is satisfied in then thoroughly discharge immediately when not satisfying condition.

2.2 course of action

2.2.1 1DL power supply dead electricity:

The combined floodgate charge circuit is 2T cd1 and 2T cd2.

(1) because 1DL power supply dead electricity, through the 1DL inspection do not have press and do not have stream, offside 2DL power supply pressure is arranged after, 1DL trips behind the tT1 that delays time.When first circuit breaker 1DL tripping operation control command has been sent the 1DL tripping operation and check the first circuit breaker 1DL really the closed expression of tripping or 1DL tripping operation back 1TWJ 1DL be in trip position, and 1KKJ is for closing a floodgate the back state, thereby the generation 1DL position of the switch is not corresponding, after 2DL combined floodgate charge circuit 2T cd1 charging was finished, time-delay tH2 started a closing pulse to the 2DL closing circuit.

(2) if being moved by first main transformer protection (or a bus protection), 1DL power supply dead electricity causes; but 2DL charge circuit 2T cd1 and 2T cd2 can not be discharged and by locking; owing to the 1DL tripping operation generation 1DL position of the switch is not corresponding or not with the 3DL tripping operation generation 3DL position of the switch; so 2DL still can move combined floodgate; can guarantee that like this main transformer of electric substation still can move, and can not cause full institute dead electricity.

(3) if stealing to jump because of switch, 1DL power supply dead electricity causes, then 1TWJ can be closed, and 1KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 1DL position of the switch equally, after second main transformer (or No. two buses) did not have pressure on inspection, time-delay tH2 started a closing pulse to the 2DL closing circuit.

(4) steal jumping as if interior bridge or block switch 3DL, then the 3TWJ meeting is closed, and 3KKJ is a state after closing a floodgate, and the generation 3DL position of the switch is not corresponding, and after second main transformer (or No. two buses) did not have pressure on inspection, closing pulse of time-delay tH2 startup was to the 2DL closing circuit.

(5) if manually draw back 1DL or 3DL, because 1KKJ or 3KKJ were the back state that closes a floodgate originally, now be state behind the separating brake, the not corresponding of 1DL or 3DL is false, thus can not start the closing circuit of 2DL, and close a floodgate charge circuit 2Tcd1 or 2Tcd2 of 2DL thoroughly discharged immediately.

2.2.2 2DL power supply dead electricity:

The combined floodgate charge circuit is 1T cd1 and 1T cd2.

(1) because 2DL power supply dead electricity, through the 2DL inspection do not have press and do not have stream, offside 1DL power supply pressure is arranged after, 2DL trips behind the tT2 that delays time.When second circuit breaker 2DL tripping operation control command has been sent the 2DL tripping operation and check the second circuit breaker 2DL really the closed expression of tripping or 2DL tripping operation back 2TWJ 2DL be in trip position, and 2KKJ is for closing a floodgate the back state, thereby the generation 2DL position of the switch is not corresponding, after 1DL combined floodgate charge circuit 1T cd1 charging was finished, time-delay tH1 started a closing pulse to the 1DL closing circuit.

(2) if being moved by second main transformer protection (or No. two bus protections), 2DL power supply dead electricity causes; but 1DL charge circuit 1T cd1 and 1T cd2 can not be discharged and by locking; owing to the 2DL tripping operation generation 2DL position of the switch is not corresponding or not with the 3DL tripping operation generation 3DL position of the switch; so 1DL still can move combined floodgate; can guarantee that like this main transformer of electric substation still can move, and can not cause full institute dead electricity.

(3) if stealing to jump because of switch, 2DL power supply dead electricity causes, then 2TWJ can be closed, and 2KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 2DL position of the switch equally, after first main transformer (or a bus) did not have pressure on inspection, time-delay tH1 started a closing pulse to the 1DL closing circuit.

(4) steal jumping as if interior bridge or block switch 3DL, then the 3TWJ meeting is closed, and 3KKJ is a state after closing a floodgate, and the generation 3DL position of the switch is not corresponding, and after first main transformer (or a bus) did not have pressure on inspection, closing pulse of time-delay tH1 startup was to the 1DL closing circuit.

(5) if manually draw back 2DL or 3DL, because 2KKJ or 3KKJ were the back state that closes a floodgate originally, now be state behind the separating brake, the not corresponding of 2DL or 3DL is false, thus can not start the closing circuit of 1DL, and close a floodgate charge circuit 1Tcd1 or 1Tcd2 of 1DL thoroughly discharged immediately.

3, main transformer power supply high-voltage switch gear is thrown mutually: the 3*2 mode

Only be used for internal bridge, and single-trunk segmental wiring is of little use.

3.1 the preparatory stage

1DL (2DL) is operation, corresponding console switch 1KK (2KK) or two-position relay memory are for after closing a floodgate, 2DL (1DL), 3DL are stand-by heat (stand-by heat main transformer ground connection plug-in strip closes), operate the 2KK of Kaitian (1KK), 3KK or two-position relay accordingly and remember for behind the separating brake.Because 1KK (2KK) is the back state that closes a floodgate, 1DL (2DL) trip(ping) circuit is open, and the closing circuit locking; Open simultaneously 2DL (1DL), 3DL combined floodgate charge circuit 2Tcd1 and 3Tcd1 (1Tcd1 and 3Tcd2), as 2DL (1DL), then charge when 3DL satisfies charge condition, charging again behind the charge condition is satisfied in then thoroughly discharge immediately when not satisfying condition.

3.2 course of action

3.2.11DL power supply dead electricity

(1) because 1DL power supply dead electricity, through the 1DL inspection do not have press and do not have stream, offside 2DL power supply pressure is arranged after, 1DL trips behind the tT1 that delays time.When first circuit breaker 1DL tripping operation control command has been sent the 1DL tripping operation and check the first circuit breaker 1DL really the closed expression of tripping or 1DL tripping operation back 1TWJ 1DL be in trip position, and 1KKJ is for closing a floodgate the back state, thereby the generation 1DL position of the switch is not corresponding, after 2DL combined floodgate charge circuit 2Tcd1 charging is finished, after second main transformer did not have pressure on inspection, time-delay TH2 started a closing pulse to the 2DL closing circuit; In the time of 1DL tripping operation simultaneously or after 3DL combined floodgate charge circuit 3Tcd1 finishes, after first main transformer did not have pressure on inspection, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(2) if 1DL power supply dead electricity is caused that by first main transformer protection action because corresponding locking has been adopted in protection action locking, 2DL combined floodgate charge circuit 2Tcd1 can not be discharged and by locking, so 2DL still can move combined floodgate.And 3DL combined floodgate charge circuit 3Tcd1 moves owing to protection and discharge immediately, and the 3DL closing circuit so 3DL can not close a floodgate, can be guaranteed that a main transformer of electric substation (zero load) still can move by locking so simultaneously, can not cause full institute dead electricity.

(3) if stealing to jump because of the 1DL switch, 1DL power supply dead electricity causes, then 1TWJ can be closed, and 1KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 1DL position of the switch equally, after second main transformer did not have pressure on inspection, time-delay tH2 started a closing pulse to the 2DL closing circuit; After first main transformer did not have pressure on inspection simultaneously, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(4) if manually draw back 1DL, because 1KKJ was the back state that closes a floodgate originally, now was state behind the separating brake, the position of the switch of 1DL is not corresponding is false, so can not start the closing circuit of 2DL, 3DL, and with 2DL close a floodgate charge circuit 2Tcd1 and 3DL combined floodgate charge circuit 3Tcd1 thoroughly discharge immediately.

3.2.2 2DL power supply dead electricity

(1) because 2DL power supply dead electricity, through the 2DL inspection do not have press and do not have stream, offside 1DL power supply pressure is arranged after, 2DL trips behind the tT1 that delays time.When second circuit breaker 2DL tripping operation control command has been sent the 2DL tripping operation and check the second circuit breaker 2DL really the closed expression of tripping or 2DL tripping operation back 2TWJ 2DL be in trip position, and 2KKJ is for closing a floodgate the back state, thereby the generation 2DL position of the switch is not corresponding, after 1DL combined floodgate charge circuit 1Tcd1 charging is finished, after first main transformer did not have pressure on inspection, time-delay tH1 started a closing pulse to the 1DL closing circuit; In the time of 2DL tripping operation simultaneously or after 3DL combined floodgate charge circuit 3Tcd2 finishes, after second main transformer did not have pressure on inspection, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(2) if 2DL power supply dead electricity is caused that by second main transformer protection action because corresponding locking has been adopted in protection action locking, 1DL combined floodgate charge circuit 1Tcd1 can not be discharged and by locking, so 1DL still can move combined floodgate.And 3DL combined floodgate charge circuit 3Tcd2 moves owing to protection and discharge immediately, and the 3DL closing circuit so 3DL can not close a floodgate, can be guaranteed that a main transformer of electric substation (zero load) still can move by locking so simultaneously, can not cause full institute dead electricity.

(3) if stealing to jump because of the 2DL switch, 2DL power supply dead electricity causes, then 2TWJ can be closed, and 2KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 2DL position of the switch equally, after first main transformer did not have pressure on inspection, time-delay tH1 started a closing pulse to the 1DL closing circuit; After second main transformer did not have pressure on inspection simultaneously, time-delay tH3 started a closing pulse to the 3DL closing circuit.

(4) if manually draw back 2DL, because 2KKJ was the back state that closes a floodgate originally, now was state behind the separating brake, the position of the switch of 2DL is not corresponding is false, so can not start the closing circuit of 1DL, 3DL, and with 1DL close a floodgate charge circuit 1Tcd1 and 3DL combined floodgate charge circuit 3Tcd2 thoroughly discharge immediately.

4, signal circuit

Each tripping operation is sent out the prepared auto restart actuating signal after exporting with combined floodgate immediately; After the main transformer protection action, in the time of locking prepared auto restart closing circuit, send out main transformer protection action locking prepared auto restart switching signal.

(2), single bus scheme embodiment

As shown in Figure 3, include the two-way power supply in the applied transmission and distribution networks of method of the present invention, be serially connected with circuit breaker 1DL and circuit breaker 2DL on the two-way power supply respectively, be connected on the bus again, also connect two main transformers (i.e. first main transformer and second main transformer) or load outlet on the bus respectively, be single bus scheme, have the line side of voltage transformer and electric power incoming line that voltage transformer is also arranged on the bus.Provide the embodiment that is applied to the automatic single bus scheme form that drops into of stand-by power supply of the inventive method below:

Primary connection mode control word KG3 is changed to 0, so the charge circuit 2Tcd2 of charge circuit 1Tcd2, the 2DL of the charge circuit 3Tcd1 of 3DL and 3Tcd2 and 1DL all can not be charged by locking, corresponding closing circuit is all by locking; A bus inspection does not have and presses and No. two bus inspections do not have pressure and are the bus inspection and do not have pressure.

1, the preparatory stage

1DL (or 2DL) is the combined floodgate running status, and its corresponding console switch 1KK (or 2KK) (or two-position relay) memory is for after closing a floodgate, and 2DL (or 1DL) is a stand-by heat, after its corresponding console switch 2KK (or 1KK) or two-position relay memory are separating brake.Because 1KK (or 2KK) is the back state that closes a floodgate, so 1DL (2DL), corresponding trip(ping) circuit are open, and the closing circuit locking; Open simultaneously 2DL combined floodgate charge circuit 2T cd1 (or 1DL combined floodgate charge circuit 1T cd1), when 2DL (or 1DL) then charges when satisfying charge condition, charging again behind the charge condition is satisfied in then thoroughly discharge immediately when not satisfying condition.

2, course of action

2.1 1DL power supply dead electricity:

(2) if 1DL power supply dead electricity is caused that by bus protection action 2DL charge circuit 2T cd1 can be discharged and by locking, so 2DL can not move combined floodgate.

(3) if 1DL power supply dead electricity steal to be jumped because of switch to be caused, then 1TWJ can be closed, and 1KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 1DL position of the switch equally, and after bus did not have pressure on inspection, time-delay tH2 started a closing pulse to the 2DL closing circuit.

(4) if manually draw back 1DL, because 1KKJ was the back state that closes a floodgate originally, now be state behind the separating brake, the not corresponding of 1DL switch is false, thus can not start the closing circuit of 2DL, and the 2DL charge circuit 2Tcd1 that closes a floodgate is thoroughly discharged immediately.

2.2 2DL power supply dead electricity:

(2) if 2DL power supply dead electricity is caused that by bus protection action 1DL charge circuit 1T cd1 can be discharged and by locking, so 1DL can not move combined floodgate.

(3) if 1DL power supply dead electricity steal to be jumped because of switch to be caused, then 1TWJ can be closed, and 1KKJ is still for closing a floodgate the back state, and it is not corresponding to produce the 1DL position of the switch equally, and after bus did not have pressure on inspection, time-delay tH1 started a closing pulse to the 1DL closing circuit.

(4) if manually draw back 2DL, because 2KKJ was the back state that closes a floodgate originally, now be state behind the separating brake, the not corresponding of 2DL switch is false, thus can not start the closing circuit of 1DL, and the 1DL charge circuit 1Tcd1 that closes a floodgate is thoroughly discharged immediately.

3, signal circuit

Claims

1. the method that the microcomputer control standby power of bridge and single bus scheme drops into automatically in a kind, it is characterized in that: it comprises the control method of internal bridge or single-trunk segmental wiring and these two kinds of basic control methods of control method of single bus scheme, wherein,

The control method of described internal bridge or single-trunk segmental wiring is: when operational mode is an internal bridge or during for single-trunk segmental wiring, primary connection mode control word KG3 is changed to 1; When an operational mode was internal bridge, setting 1BCJ was that first main transformer protection, 2BCJ are second main transformer protection; When an operational mode was single-trunk segmental wiring, setting 1BCJ was that bus protection, a 2BCJ are No. two bus protections; Specifically comprise following control procedure,

When these several conditions of position satisfy simultaneously when the first circuit breaker 1DL source current 1I1 does not have stream definite value, the first circuit breaker 1DL supply voltage 1U1 and has the two-position relay 1KKJ of compression set value and the first circuit breaker 1DL hand control switch 1KK or its deciliter state to be in less than the no compression set value of separating brake inspection, the second circuit breaker 2DL supply voltage 2U1 greater than the separating brake inspection to close a floodgate less than separating brake inspection after, through certain time-delay tT1, to first circuit breaker 1DL tripping operation control loop output pulse control signal, make first circuit breaker 1DL tripping operation, export stand-by power supply input tripping operation actuating signal simultaneously;

When these several conditions of position satisfy simultaneously when the second circuit breaker 2DL source current 2I1 does not have stream definite value, 2DL supply voltage 2U1 and has the two-position relay 2KKJ of compression set value and 2DL hand control switch 2KK or its deciliter state to be in less than the no compression set value of separating brake inspection, the first circuit breaker 1DL supply voltage 1U1 greater than the separating brake inspection to close a floodgate less than separating brake inspection after, through certain time-delay tT2, to 2DL tripping operation control loop output pulse control signal, make second circuit breaker 2DL tripping operation, export stand-by power supply input tripping operation actuating signal simultaneously;

Condition a. discharging condition one

When first main transformer protection or a bus protection 1BCJ action;

Condition b. charge condition one

When above-mentioned arbitrary charge condition one satisfies and arbitrary discharging condition one when not satisfying, the first circuit breaker 1DL finishes the charging control of closing a floodgate after the charging time-delay;

Condition c. discharging condition two

When first main transformer protection or a bus protection 1BCJ action;

Condition d. charge condition two

Primary connection mode control word KG3 is 1;

When above-mentioned arbitrary charge condition two satisfies and arbitrary discharging condition two when not satisfying, the first circuit breaker 1DL finishes the charging control of closing a floodgate after the charging time-delay;

When really tripping of the second circuit breaker 2DL has been sent and checked to second circuit breaker 2DL tripping operation control command;

Or when the first circuit breaker 1DL power supply main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in and closes a floodgate simultaneously and the second circuit breaker 2DL is in the separating brake position;

The charging delay time arrives;

First main transformer protection or a not action of bus protection;

When above condition satisfies, output pulse control signal to the first circuit breaker 1DL combined floodgate control loop after delaying time, the first circuit breaker 1DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal;

When the first circuit breaker 1DL power supply main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 3KKJ of the 3rd circuit breaker 3DL hand control switch 3KK or its deciliter state is in and closes a floodgate simultaneously and the 3rd circuit breaker 3DL is in the separating brake position;

The charging delay time arrives;

First main transformer protection or a not action of bus protection;

When above condition all satisfies, after delaying time, export pulse control signal to the first circuit breaker 1DL combined floodgate control loop equally, the first circuit breaker 1DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal;

Condition a. discharging condition one

When second main transformer protection or No. two bus protection 2BCJ actions;

Condition b. charge condition one

When above-mentioned arbitrary charge condition one satisfies and arbitrary discharging condition one when not satisfying, the second circuit breaker 2DL finishes the charging control of closing a floodgate after the charging time-delay;

Condition c. discharging condition two

When second main transformer protection or No. two bus protection 2BCJ actions;

Condition d. charge condition two

Primary connection mode control word KG3 is 1;

When above-mentioned arbitrary charge condition two satisfies and arbitrary discharging condition two when not satisfying, the second circuit breaker 2DL finishes the charging control of closing a floodgate after the charging time-delay;

When really tripping of the first circuit breaker 1DL has been sent and checked to first circuit breaker 1DL tripping operation control command;

Or when the second circuit breaker 2DL power supply main transformer high side voltage or No. two busbar voltages less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in and closes a floodgate simultaneously and the first circuit breaker 1DL is in the separating brake position;

Charging delay time 2Tcd1 arrives;

Second main transformer protection or No. two not actions of bus protection;

When above condition satisfies, output pulse control signal to the second circuit breaker 2DL combined floodgate control loop after delaying time, the second circuit breaker 2DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal;

When the second circuit breaker 2DL power supply main transformer high side voltage or No. two busbar voltages less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 3KKJ of 3DL hand control switch 3KK or its deciliter state is in and closes a floodgate simultaneously and circuit breaker 3DL is in the separating brake position;

Charging delay time 2Tcd2 arrives;

Second main transformer protection or No. two not actions of bus protection;

When above condition all satisfies, after delaying time, export pulse control signal to the second circuit breaker 2DL combined floodgate control loop equally, the second circuit breaker 2DL closes a floodgate, and exports stand-by power supply simultaneously and drops into the feed motion signal;

Condition a. discharging condition one

When first main transformer protection or a bus protection 1BCJ action;

When circuit breaker 3DL sends the combined floodgate control command;

Condition b. charge condition one

When the separating brake position relay 3TWJ of 3DL action;

Primary connection mode control word KG3 is 1;

When above-mentioned arbitrary charge condition one satisfies and arbitrary discharging condition one when not satisfying, 3DL finishes the charging control of closing a floodgate after the charging time-delay;

Condition c. discharging condition two

When second main transformer protection or No. two bus protection 2BCJ actions;

When circuit breaker 3DL sends the combined floodgate control command;

Condition d. charge condition two

When the separating brake position relay 3TWJ of 3DL action;

Primary connection mode control word KG3 is 1;

When above-mentioned arbitrary charge condition two satisfies and arbitrary discharging condition two when not satisfying, 3DL finishes the charging control of closing a floodgate after the charging time-delay;

Or when the first circuit breaker 1DL power supply main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in and closes a floodgate simultaneously and circuit breaker 1DL is in the separating brake position;

Charging delay time 3Tcd1 arrives;

First main transformer protection or a not action of bus protection;

When above condition satisfied, the output pulse control signal was to the 3DL control loop that closes a floodgate after delaying time, and 3DL closes a floodgate, and exported stand-by power supply simultaneously and dropped into the feed motion signal;

Or when the second circuit breaker 2DL power supply main transformer high side voltage or No. two busbar voltages less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in and closes a floodgate simultaneously and the second circuit breaker 2DL is in the separating brake position;

Charging delay time 3Tcd2 arrives;

Second main transformer protection or No. two not actions of bus protection;

When above condition all satisfied, the output pulse control signal was to the 3DL control loop that closes a floodgate after delaying time equally, and 3DL closes a floodgate, and exported stand-by power supply simultaneously and dropped into the feed motion signal;

The control of control procedure I. abnormal signal

When the first main transformer high side voltage or busbar voltage less than the no compression set value of inspection of closing a floodgate, or the second main transformer high side voltage or No. two busbar voltages examine no compression set value less than closing a floodgate, and send abnormal signal after certain time-delay; When the first circuit breaker 1DL does not send the tripping operation control command, and the first circuit breaker 1DL source current 1I1 less than separating brake inspection do not have stream definite value or the first circuit breaker 1DL supply voltage 1U1 less than the two-position relay 1KKJ of separating brake the no compression set value of inspection and the first circuit breaker 1DL hand control switch 1KK or its deciliter state be in close a floodgate after during the position, after certain time-delay, send abnormal signal;

When the second circuit breaker 2DL does not send the tripping operation control command, and the second circuit breaker 2DL source current 2I1 less than separating brake inspection do not have stream definite value or the second circuit breaker 2DL supply voltage 2U1 less than the two-position relay 2KKJ of separating brake the no compression set value of inspection and the second circuit breaker 2DL hand control switch 2KK or its deciliter state be in close a floodgate after during the position, after certain time-delay, send abnormal signal.

2. the method that the microcomputer control standby power of bridge and single bus scheme drops into automatically in according to claim 1, it is characterized in that: when an operational mode is single bus scheme, primary connection mode control word KG3 is changed to 0, the charging timing circuit 2Tcd2 of charging timing circuit 1Tcd2, the second circuit breaker 2DL of the first circuit breaker 1DL and charging timing circuit 3Tcd1, the 3Tcd2 of the 3rd circuit breaker 3DL all can not be charged by locking at this moment, and corresponding closing circuit is all by locking; 1BCJ, 2BCJ all are set at bus protection; A bus inspection does not have and presses and No. two bus inspections do not have pressure and are the bus inspection and do not have pressure; Specifically comprise following control procedure,

When these several conditions of position satisfy simultaneously when the second circuit breaker 2DL source current 2I1 does not have stream definite value, the second circuit breaker 2DL supply voltage 2U1 and has the two-position relay 2KKJ of compression set value and the second circuit breaker 2DL hand control switch 2KK or its deciliter state to be in less than the no compression set value of separating brake inspection, the first circuit breaker 1DL supply voltage 1U1 greater than the separating brake inspection to close a floodgate less than separating brake inspection after, through certain time-delay tT2, to second circuit breaker 2DL tripping operation control loop output pulse control signal, make second circuit breaker 2DL tripping operation, export stand-by power supply input tripping operation actuating signal simultaneously;

Condition a. discharging condition

When bus protection 1BCJ action;

Condition b. charge condition

When above-mentioned arbitrary charge condition satisfies and arbitrary discharging condition when not satisfying, the first circuit breaker 1DL finishes the charging control of closing a floodgate after the charging time-delay;

The first circuit breaker 1DL combined floodgate controlled condition

Or when busbar voltage less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 2KKJ of the second circuit breaker 2DL hand control switch 2KK or its deciliter state is in and closes a floodgate simultaneously and the second circuit breaker 2DL is in the separating brake position;

Charging delay time 1Tcd1 arrives;

Bus protection is action not;

Condition a. discharging condition

When bus protection 2BCJ action;

Condition b. charge condition

When above-mentioned arbitrary charge condition satisfies and arbitrary discharging condition when not satisfying, the second circuit breaker 2DL finishes the charging control of closing a floodgate after the charging time-delay;

The second circuit breaker 2DL combined floodgate controlled condition:

Or when busbar voltage less than the no compression set value of inspection of closing a floodgate, position after the two-position relay 1KKJ of the first circuit breaker 1DL hand control switch 1KK or its deciliter state is in and closes a floodgate simultaneously and the first circuit breaker 1DL is in the separating brake position;

Charging delay time 2Tcd1 arrives;

Bus protection is action not;

The control of control procedure G. abnormal signal, promptly