CN105649770A - Interlocking device used for diesel power generation system and standby power supply of diesel power generation system - Google Patents

Abstract

The invention provides an interlocking device used in a diesel power generation system and when it is used as a backup power supply. The interlocking device for a diesel power generation system includes an air inlet valve, an air compressor starting valve, a circuit breaker, a key and an exchange box matching the key, an isolation switch, and a grounding switch. The maintenance conditions of the diesel power generation system are similar to those of the medium-voltage incoming line system and the low-voltage system. The diesel power generation system is used as an interlocking device for backup power supply, including a circuit breaker, a key and an exchange box matched with the key.

Description

Interlocking device for diesel power generation system and its backup power supply

technical field

The invention relates to an interlocking device used in a diesel power generation system and when it is used as a backup power supply, in particular to a switch cabinet interlocking device used for preventing misoperation of the diesel power generation system of a nuclear power plant.

Background technique

The backup diesel generator set is an important system in a nuclear power plant. When other power sources fail due to some external reasons or their own factors and cannot provide power for electrical equipment or systems, the backup diesel generator set starts as a backup power source to make the core cool down, and the reactor shuts down safely. However, in order to ensure that the standby diesel generators can be started correctly in accordance with the required sequence, an interlock of the emergency diesel power generation system must be set up to prevent misoperations and ensure the safe operation of the nuclear power plant. As a nuclear safety emergency power supply system, the backup diesel engine is the last power supply system of the nuclear power plant. The backup diesel generator set plays a huge role in the event of plant power and auxiliary power failure. Therefore, the interlock design of emergency diesel generators in nuclear power plants provides stable, reliable, safe and sufficient power for nuclear reactors. In the work of the diesel power generation system, the mature and perfect interlock is to ensure that the power supply system of the diesel generator set is started correctly in accordance with the prescribed order, and to prevent the occurrence of misoperation.

Contents of the invention

The present invention mainly provides an interlocking device used in a diesel power generation system and as a backup power supply, which can effectively solve the above problems.

An interlocking device for a diesel power generation system, including an air inlet valve, an air compressor starting valve, a circuit breaker, a key and a switch box matching the key, a disconnector switch, and a grounding switch. The interlocking device is operated according to the following steps in the maintenance working condition:

(1) Disconnect the first starting air inlet valve 250VA and the second starting air inlet valve 251VA of the diesel power generation system, lock them in the closed position, and release the first key XC and the second key XD;

(2) Insert the first key XC and the second key XD into the first exchange box 0LHS001CV, release the third key XP, and disconnect the signals of the first air compressor start valve 275VA and the second air compressor start valve 276VA , the shutdown signal will be sent to the instrument control cabinet, and then sent to the main control room. At this time, the generator set in the factory area will not be able to start, and the diesel power generation system will stop working;

(3) Operate the third key XP into the second exchange box OLHM101CV, at this time, release the fourth key XP1 because the third key XP is locked, and insert the fourth key XP1 into the diesel engine incoming circuit breaker At the grounding switch of the device, unlock the opening, close the grounding switch, lock the closing, and release the fifth key B;

(4) Operate the fifth key B into the third exchange box 0LHM102CV, the fifth key B is locked, the sixth key XY, the seventh key XB and the eighth key XV are released;

(5) Insert the seventh key XB into the generator medium voltage excitation cabinet 0LHS952AR, open the cabinet door for inspection; insert the eighth key XV into the generator neutral point grounding terminal box 0LHS901CR, open the door for inspection ;

(6) Overhaul transformer OLLT002TR.

The interlock device is operated in the low-voltage commissioning condition according to the following steps:

(1) Use the ninth key XS to close the second circuit breaker 0LHM002JA, open the grounding switch, and lock the open position of the grounding switch;

(2) Lock the generator medium voltage excitation cabinet 0LHS952AR, release the seventh key XB, lock the neutral point terminal box 0LHS901CR of the generator, and release the eighth key XV;

(3) Insert the sixth key XY, seventh key XB and eighth key XV into the third exchange box 0LHM102CV, release the fifth key B, and operate the fifth key B to the diesel engine inlet line At the grounding switch of the circuit breaker, unlock and close, and open the grounding switch to release the fourth key XP1, and insert the fourth key XP1 into the second exchange box 0LHM101CV to obtain the third key XP;

(4) Insert the third key XP into the first exchange box 0LHS001CV to obtain the first key XC and the second key XD, insert the first key XC and the second key XD into the diesel engine In the first starting air inlet valve 250VA and the second starting air inlet valve 251VA, unlock the closed valve and open the valve, so that the first key XC and the second key XD cannot be pulled out. At this time, send to the instrument The signals of the control cabinet and the main control room disappear, and the diesel power generation system starts normally after receiving the start signal.

The interlocking device operates in the medium-voltage commissioning condition according to the following steps:

(1) Open the second circuit breaker 0LHM002JA from 0LHM001TB to 0LLT002TB, ground the grounding switch, lock the closed position of the grounding switch, and obtain the ninth key XS;

(2) Disconnect the first starting air inlet valve 250 and the second starting air inlet valve 251VA of the diesel engine, lock them in the closed position, and release the first key XC and the second key XD;

(3) Insert the first key XC and the second key XD into the first exchange box 0LHS001CV, release the third key XP, and simultaneously activate the first air compressor valve 275V and the second The signal that the air compressor starting valve 276VA is disconnected is sent to the instrument control cabinet, and then sent to the main control room, and the diesel generator set stops working at this time;

(4) Insert the third XP into the second exchange box OLHM101CV, release the fourth key XP1, insert the fourth key XP1 into the ground switch, the circuit breaker is unlocked and opened, and the ground switch is locked and closed Gate, get the fifth key B;

(5) Insert the fifth key B into the third exchange box 0LHM102CV, release the sixth key XY, the seventh key XB and the eighth key XV;

(6) Insert the sixth key XY into the communication plug box, open the door, plug in the plug and select the 1~2# unit plug, lock the door, and retrieve the sixth key XY; insert the seventh key XB Insert it into the medium voltage excitation cabinet 0LHS952AR, and open the door for operation; insert the eighth key XV into the generator neutral point terminal box 0LHS901CR, and open the door for operation;

(7) Insert the sixth key XY and ninth XS into the fourth exchange box 0LHM001CV to release the tenth key HM1, open the third circuit breaker 0LHM003JA cabinet door from OLHM to 1~2# unit 9LHT, and put the first The trolley of the three circuit breakers is pushed in;

(8) Take out the eleventh key 1X and the twelfth 2HT of units 1~2# from the main control room, and insert the eleventh key 1X and the twelfth key 2HT into the fifth exchange box 0LHM002CV, Release the thirteenth key 2B, insert the thirteenth key 2B into the third circuit breaker 0LHM003JA of OLHM to 1~2# unit 9LHT, and push the trolley of the third circuit breaker into Working position, at this time the thirteenth key 2B cannot be pulled out;

(9) Lock the cabinet door of the third circuit breaker 0LHM003JA from 0LHM001TB to 1~2# unit 9LHT, release the tenth key HM1, insert the tenth key HM1 into the fourth exchange box 0LHM001CV to release the Describe the sixth key XY and the ninth key XS;

(10) Use the sixth key XS to close the second circuit breaker 0LHM002JA from 0LHM001TB to 0LLT002TR, open the grounding switch, and lock the open position of the grounding switch;

(11) Lock the generator medium voltage excitation cabinet 0LHS952AR, release the seventh key XB, lock the neutral point terminal box 0LHS901CR of the generator, and release the eighth key XV;

(12) Insert the sixth key XY, seventh key XB and eighth key XV into the third exchange box 0LHM102CV, release the fifth key B, and insert the fifth key B into the 0LHM001JA The first circuit breaker is unlocked and closed, the grounding switch is locked and opened to obtain the fourth key XP1, and the fourth key XP1 is inserted into the second exchange box OLHM101CV to obtain the third key XP;

(13) Insert the third key XP into the first exchange box 0LHS001CV to obtain the first key XC and second key XD; insert the first key XC and second key XD into the diesel engine In the first starting air inlet valve 250VA and the second starting air inlet valve 251VA, the valves are unlocked and closed, and the valves are opened. At this time, the first key XC and the second key XD cannot be pulled out, so that the The signals of the cabinet and the main control room disappear, and the diesel power generation system starts normally after receiving the start signal.

The present invention further provides an interlocking device for a diesel power generation system as a backup power supply, including a circuit breaker, a key and a switch box matched with the key. It is characterized in that: the interlocking device operates according to the following steps:

(1) Use the keys 2HT, XU obtained from the operator, insert the keys 2HT and XU into the key exchange box 9LHT003CV and rotate them, the keys 2HT, XU are captured, and the keys 11HT, 12HT, 13HT, 14HT are released at the same time ;

(2) Insert the keys 11HT, 12HT, 13HT, 14HT released from operation sequence 1 and the key 11X obtained from the operator into the key exchange box 9LHT001CV, and rotate the keys 11X, 11HT, 12HT, 13HT, 14HT, so that these keys are captured, and the key 9LHT2 is released at the same time;

(3) Insert the key 9LHT2 and the key ET1 collected from the operator into the exchange box 9LHT101CV of the diesel generator incoming cabinet; rotate the key 9LHT2, ET1, the two keys are captured and the key A1 , A11 is released; then use the key A1 to unlock the isolation car of the incoming line cabinet, insert the isolation car, the key BBT is released, and the cabinet isolation car is locked at the working position at the same time; insert the key BBT, A11 into the central key box 9LHT002CV and rotate to get the key 9LHT1; at the same time the key 1X is released and can be used to start the generator;

(4) Open the 05 cabinet door and remove the isolation car; insert the isolation car into 1LHA; close the cabinet door of the 1LHA incoming line cabinet;

(5) Insert the key ET2, the key 9LHT1 obtained in the third step, and the key 19HA obtained by operating the advantage to the key exchange box 9LHT201CV; rotate the keys ET2, 9LHT1, and 19HA, and the 3 keys are captured and the keys A2 and A21 are released at the same time ;

(6) Insert the key A2 into the lock hole of the isolation car in cabinet 02 and rotate it. At this time, the isolation car is unlocked and can be inserted. After inserting the isolation car, the key A2 is captured. At this time, the key BBT is available. Insert the keys BBT and A21 into the center key box 9LHT202CV and rotate, the two keys are captured, at this time the key 12HT is released;

(7) Insert the key 12HT into the key exchange box 9LHT203CV and rotate it, the key is captured and the key G is obtained at the same time;

(8) Insert the key G into the lock hole of the low-voltage room of cabinet 01 and rotate it. At this time, the door of the cabinet can be opened and the key is captured. Open the door of the low-voltage room, and connect the secondary socket 9LHT002PJ and 1LHA0012PJ with a plug;

(9) Close the door of the low-voltage room of cabinet 01, and get the key G after locking the door;

(10) Reinsert the key G into the key exchange box 9LHT203CV, rotate and get 12HT;

(11) In the 1LHA bus section, pull out 1LHA001JA in 1LGB, release B, insert B into the exchange box of the cabinet and rotate it, B is captured, and 2B and 3HA are released at the same time; keys 2B and 3HA are kept in the hands of the operator to prevent Someone plugged the circuit breaker next to the cabinet during power down;

(12) At the 1LHA bus section, pull out 1LHA002JA, and A is released; insert key A into the key exchange box of the cabinet and rotate it, key A is captured, and at the same time, keys 1P and 1HA (1) are released; put the key 1HA (1 ) and the key 12HT into the key hole of 1LHA003JA and rotate, the two keys are captured and key D is released; insert the key D into the key hole of the 1LHA003JA circuit breaker handcart and rotate, insert 1LHA002JA into 1LHA003JA, when the circuit breaks After the device is inserted, the key D is captured;

(13) When the 1LHA circuit breaker is closed, the electrical connection between the incoming line cabinet 9LHT and the medium voltage power distribution system 1LHA is established.

Through the design of the above steps, the setting of mechanical lock can effectively ensure the safety of nuclear power plant operation, so that the operator can force the electrical equipment to operate correctly and safely according to the established procedures, thereby effectively avoiding operational errors and ensuring the reliable operation of the entire system. The step design complies with the "five defenses" requirements of the power system, and the rigorous step design is exchanged for higher safety of the nuclear power plant. At the same time, the design of the interlocking method is simpler, more effective, direct and reliable than other error prevention measures.

Description of drawings

Figure 1 is a schematic diagram of the wiring of a diesel power generation system, a medium-voltage incoming line system, and a low-voltage incoming line system.

Fig. 2 is an interlocking diagram of the diesel power generation system and the low-voltage and medium-voltage incoming line systems.

Fig. 3 is an operation flowchart of the maintenance working condition of the diesel power generation system.

Fig. 4 is an operation flow chart of the diesel power generation system and the low-voltage incoming line system in operation.

Fig. 5 is a flow chart of operation of the diesel power generation system and the medium-voltage incoming line system in operation.

Fig. 6 is an electrical connection diagram of a diesel power generation system as a backup power supply and the emergency medium-voltage incoming line system.

Fig. 7 is a power supply interlocking diagram of a diesel power generation system as a backup power supply.

Fig. 8 is a flowchart of the operation of the diesel power generation system as a backup power source.

Fig. 9 is an upstream interlocking diagram of a diesel power generation system as a backup power source.

detailed description

Please refer to FIG. 1 . FIG. 1 provides a wiring schematic diagram of a diesel power generation system, a medium-voltage incoming line system, and a low-voltage incoming line system. Figure 2 is a mechanical program lock added on the basis of the electrical connection in Figure 1, that is, Figure 2 is an interlocking diagram of the diesel power generation system and the low-voltage and medium-voltage incoming line systems. Figure 3 shows the operation process of the diesel power generation system under maintenance conditions, specifically as follows:

Step 1: Disconnect the starting air inlet valve 250/251VA of the 0LHS diesel engine, lock it in the closed position, and release the keys XC, XD;

Step 2: Insert XC and XD into the exchange box 0LHS001CV, release the key XP, and disconnect the signal of the air compressor start valve 275VA, 276VA at the same time, send it to the instrument control cabinet, and then send it to the main control room. At this time, the factory generates electricity The unit will not start and the system will be unavailable;

Step 3: Operate the XP into the exchange box OLHM101CV, the XP is locked and the key XP1 is released. Insert XP1 into the grounding switch of the diesel engine incoming circuit breaker, unlock the opening, close the grounding switch, lock the closing, and release key B;

Step 4: Operate B into the exchange box 0LHM102CV, the key B is locked, and the keys XY, XB, and XV are released;

Step 5: Insert the key XB into the medium voltage excitation cabinet 0LHS952AR of the generator to open the cabinet door for maintenance; insert the key XV into the neutral point grounding terminal box 0LHS901CR of the generator to open the door for maintenance;

Step 6: Overhaul transformer OLLT002TR.

Figure 4 shows the operation process of the diesel power generation system and the low-voltage incoming line system in operation, as follows:

Step 1: Use the key XS to close the circuit breaker 0LHM002JA from 0LHM001TB to 0LLT002TR, open the grounding switch, and lock the open position of the grounding switch;

Step 2: Lock the generator medium voltage excitation cabinet 0LHS952AR, release the key XB, lock the neutral point terminal box 0LHS901CR of the generator, and release the key XV;

Step 3: Insert the keys XY, XB, XV into the key exchange box 0LHM102CV, release B, operate the key B to the grounding switch of the diesel engine incoming line circuit breaker, unlock and close the switch, release XP1 from the grounding switch, insert XP1 into Get key XP in 0LHM101CV;

Step 4: Insert XP into 0LHS001CV to get XC, XD. Insert the key XC, XD into the starting air inlet valve 250VA, 251VA of the 0LHS diesel engine, unlock and close the valve, open the valve, the key XC, XD cannot be pulled out, the signal sent to the instrument control cabinet and the main control room disappears, after receiving After the start signal, it can start normally.

Figure 5 shows the operation process of the diesel power generation system and the medium-voltage incoming line system in operation, as follows:

Step 1: Open the circuit breaker 0LHM002JA from 0LHM001TB to 0LLT002TB, ground the grounding switch, lock the closing position of the grounding switch, and get the key XS;

Step 2: Disconnect the starting air inlet valve 250/251VA of the 0LHS diesel engine, lock it in the closed position, and release the keys XC, XD;

Step 3: Insert XC and XD into 0LHS001CV, release the key XP, and at the same time, send the signal of disconnecting the air compressor start valve 275VA and 276VA to the instrument control cabinet, and then to the main control room. At this time, the diesel generator set unavailable;

Step 4: Insert the XP into the OLHM101CV, release the key XP1. Insert XP1 into the ground switch, the circuit breaker is unlocked and opened, the ground switch is locked and closed, and key B is obtained;

Step 5: Insert B into 0LHM102CV, release keys XY, XB, XV;

Step 6: Insert the key XY into the communication plug box, open the door, plug in the plug and select the 1~2# unit plug, lock the door, and retrieve the key XY; insert the key XB into the medium voltage excitation cabinet 0LHS952AR, open the door, and carry out Operation; insert XV into 0LHS901CR to open the door and operate;

Step 7: Insert XY and XS into 0LHM001CV to release HM1, open the 0LHM003JA cabinet door of circuit breaker 0LHM003JA from OLHM to 1~2# unit 9LHT, and push the circuit breaker trolley in;

Step 8: Take out the 1~2# unit key 1X, 2HT from the main control room, insert the key into the key exchange box 0LHM002CV, release the key 2B, and insert it into the circuit breaker from OLHM to 1~2# unit 9LHT, The circuit breaker trolley can be pushed into the working position, and the key 2B cannot be pulled out;

Step 9: Lock 0LHM001TB to 0LHM003JA cabinet door of unit 9LHT circuit breaker 0LHM003JA of 1~2# units, release HM1, insert the key into 0LHM001CV to release XY, XS;

Step 10: Use the key XS to close the circuit breaker 0LHM002JA from 0LHM001TB to 0LLT002TR, open the grounding switch, and lock the open position of the grounding switch;

Step 11: Lock the generator medium voltage excitation cabinet 0LHS952AR, release the key XB, lock the neutral point terminal box 0LHS901CR of the generator, and release the key XV;

Step 12: Insert the keys XY, XB, XV into the key exchange box 0LHM102CV, release B, insert B into the 0LHM001JA circuit breaker to unlock and close, lock and open the grounding switch to get XP1, insert XP1 into 0LHM101CV to get XP;

Step 13: Insert XP into 0LHS001CV to get XC, XD; insert XC, XD into the starting air inlet valve 250VA, 251VA of 0LHS diesel engine, unlock and close the valve, open the valve, key XC, XD cannot be pulled out, send The signal to the instrument control cabinet and the main control room disappears, and it can start normally after receiving the start signal.

Figure 6 shows the electrical connection to the emergency medium voltage incoming line system when the diesel power generation system is used as a backup power source. Fig. 7 shows that a mechanical program lock is added on the basis of the electrical connection in Fig. 6, that is, the power supply interlock of the diesel power generation system as a backup power supply. Figure 8 shows the operation process of the diesel power generation system as a backup power supply, which is as follows:

The first step is to use the keys 2HT, XU obtained from the operator, insert the keys 2HT and XU into the key exchange box 9LHT003CV and rotate them, the keys 2HT, XU are captured, and the keys 11HT, 12HT, 13HT, 14HT are captured freed;

The second step is to insert the keys 11HT, 12HT, 13HT, 14HT released from operation sequence 1 and the key 11X obtained from the operator into the key exchange box 9LHT001CV. Rotate said keys 11X, 11HT, 12HT, 13HT, 14HT, so that these keys are captured while key 9LHT2 is released;

The third step is to insert the key 9LHT2 and the key ET1 collected from the operation leader into the exchange box 9LHT101CV of the diesel generator incoming cabinet; rotate the key 9LHT2, ET1, and the two keys are captured at the same time. A1, A11 is released; then use the key A1 to unlock the isolation car of the incoming line cabinet, insert the isolation car, the key BBT is released, and the cabinet isolation car is locked at the working position; insert the key BBT, A11 into the central key Box 9LHT002CV and rotate to get key 9LHT1; at the same time key 1X is released and can be used to start the generator;

Step 4: Open the door of cabinet 05 and remove the isolation cart; insert the isolation cart into 1LHA; close the cabinet door of the incoming line cabinet of 1LHA;

The fifth step is to insert the key ET2, the key 9LHT1 obtained in the third step, and the key 19HA obtained by operating the advantage to the key exchange box 9LHT201CV; rotate the keys ET2, 9LHT1, 19HA, when these 3 keys are captured, the keys A2 and A21 are captured freed;

The sixth step is to insert the key A2 into the lock hole of the isolation car of cabinet 02 and rotate it. At this time, the isolation car is unlocked and can be inserted. The key A2 is captured after being inserted into the isolated car, and the key BBT is available at this time. Insert the key BBT and A21 into the central key box 9LHT202CV and rotate, the two keys are captured, and the key 12HT is released at this time;

The seventh step is to insert the key 12HT into the key exchange box 9LHT203CV and rotate it, the key is captured and the key G is obtained at the same time;

Step 8: Insert the key G into the lock hole in the low-voltage room of cabinet 01 and turn it. At this time, the cabinet door can be opened and the key is captured. Open the door of the low-voltage room, and connect the secondary socket 9LHT002PJ with the plug of 1LHA0012PJ;

Step 9: Close the door of the low-voltage room of cabinet 01, and get the key G after locking the door;

Step 10, reinsert the key G into the key exchange box 9LHT203CV, rotate and get 12HT;

The eleventh step, in the 1LHA bus section, pull out 1LHA001JA in 1LGB, and release B. Insert B into the exchange box of the cabinet and rotate it, B is captured, and 2B and 3HA are released at the same time; the keys 2B and 3HA are kept in the hands of the operator to prevent someone from inserting the circuit breaker next to the cabinet during power down;

The twelfth step, in the 1LHA bus section, pull out 1LHA002JA, A is released; insert the key A into the key exchange box of the cabinet and rotate it, the key A is captured, and at the same time the key 1P and 1HA (1) are released; the key 1HA (1) Insert the key 12HT into the key hole of 1LHA003JA and rotate, the two keys are captured and key D is released; insert the key D into the key hole of the 1LHA003JA circuit breaker handcart and rotate, insert 1LHA002JA into 1LHA003JA, When the circuit breaker is plugged in, key D is captured;

In the thirteenth step, when the 1LHA circuit breaker is closed, the electrical connection between the incoming line cabinet 9LHT and the medium voltage power distribution system 1LHA is established.

Further, 1LGB normal grounding switch key lock 6B passes through complex switchgear upstream of 1LGB, when their circuit breaker handcart is pulled out, the key will be released, and when a series of circuit breakers are pulled out, A series of keys will be released. When the 1LHA circuit breaker handcart is drawn out, 6B is inserted into the key hole of the grounding switch to lock it, and the grounding switch is at the closing position at this time.

Further, Figure 9 shows the upstream interlocking of emergency diesel power generation. When the starting air inlet valve of the emergency diesel generator is closed, release the keys 7P and 8P, insert the keys 7P and 8P into the exchange box 1LHP401CV, turn the keys 7P and 8P, at this time the keys 7P and 8P are locked, and the key 3P is released , when the key 3P is inserted into the keyhole of the grounding switch of the 1LHP incoming cabinet, the key 3P is rotated to be locked, and the key 4P is released, and 4P is the key for the door of the medium voltage excitation cabinet.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. for an interlocking gear for diesel generation system, comprise air inlet valve, air compressor starting valve, isolating switch, key and the exchange box mated mutually with key, isolator, grounding switch, it is characterised in that: described interlocking gear carries out maintenance operating mode operation according to the following step:

(1) the first starting air inlet valve 250VA and the 2nd starting air inlet valve 251VA of described diesel generation system is disconnected, it is locked in off-position, discharges the first key XC and the 2nd key XD;

(2) the first key XC and the 2nd key XD is inserted in the first exchange box 0LHS001CV, discharge the 3rd key XP, disconnect the first air compressor starting valve 275VA and the signal of the 2nd air compressor starting valve 276VA simultaneously, the signal closed can be sent to instrument control case, and then it is sent to master control room, now plant area's generating set can not start, described diesel generation system stalls;

(3) described 3rd key XP is operated in the 2nd exchange box OLHM101CV, now discharge the 4th key XP1 because described 3rd key XP is locked, described 4th key XP1 is inserted into diesel engine lead-in circuit breaker grounding switch place, unlock a point lock, grounding switch closes a floodgate to lock and closes a floodgate, release the 5th key B;

(4) being operated to by described 5th key B in the 3rd exchange box 0LHM102CV, described 5th key B is locked, and the 6th key XY, the 7th key XB and the 8th key XV are released;

(5) described 7th key XB is inserted in generator and presses excitation cabinet 0LHS952AR place, open the maintenance of cabinet door; Described 8th key XV is inserted into generator neutral point earthing terminal case 0LHS901CR place, opens the maintenance of case door;

(6) transformer OLLT002TR is overhauled.

2. interlocking gear according to claim 1, it is characterised in that: described interlocking gear according to the following step carry out low pressure put into operation operating mode operation:

(1) with the 9th key XS, the 2nd isolating switch 0LHM002JA is closed a floodgate, grounding switch tripping, locking grounding switch tripping position;

(2) excitation cabinet 0LHS952AR being pressed in described generator to lock, release the 7th key XB, locks described generator neutral point connection terminal case 0LHS901CR, release the 8th key XV;

(3) by described 6th key XY, 7th key XB and the 8th key XV inserts in described 3rd exchange box 0LHM102CV, discharge described 5th key B, described 5th key B is operated diesel engine lead-in circuit breaker grounding switch place, unlock and close a floodgate, the grounding switch tripping described 4th key XP1 of release, is inserted into described 4th key XP1 in described 2nd exchange box 0LHM101CV and obtains described 3rd key XP;

(4) described 3rd key XP is inserted into described first exchange box 0LHS001CV in obtain described first key XC and the 2nd key XD, described first key XC and the 2nd key XD is inserted in the described first starting air inlet valve 250VA and the 2nd starting air inlet valve 251VA of described diesel engine, unlock closed valve, open valve, described first key XC and the 2nd key XD can not be pulled out out, now, the blackout being sent to instrument control case and master control room, described diesel generation system normal starting after receiving start signal.

3. interlocking gear according to claim 1, it is characterised in that: described interlocking gear according to the following step carry out middle pressure put into operation operating mode operation:

(1) dividing lock, ground switch earthing by the 2nd isolating switch 0LHM002JA of 0LHM001TB to 0LLT002TB, locking grounding switch closing position, obtains described 9th key XS;

(2) the first starting air inlet valve 250 of described diesel engine and the 2nd starting air inlet valve 251VA are disconnected, it is locked in off-position, discharges described first key XC and described 2nd key XD;

(3) described first key XC and the 2nd key XD is inserted in described first exchange box 0LHS001CV, described 3rd key XP in release, the signal that described first air compressor starting valve 275V and the 2nd air compressor starting valve 276VA disconnects is sent to instrument control case simultaneously, and then it is sent to master control room, now engine generator set stopping work;

(4) by described for described 3rd XP insertion the 2nd exchange box OLHM101CV, discharging described 4th key XP1, described 4th key XP1 is inserted into switch place, ground, isolating switch unlocks a point lock, and grounding switch locking is closed a floodgate, and obtains described 5th key B;

(5) described 5th key B is inserted in described 3rd exchange box 0LHM102CV, discharges described 6th key XY, the 7th key XB and the 8th key XV;

(6) described 6th key XY is inserted into communication plug box place, opens door, plug plug and select 1 ~ 2# unit plug, lock the door, fetch described 6th key XY; Described 7th key XB is inserted in described middle pressure excitation cabinet 0LHS952AR, and opens door and operate; Described 8th key XV is inserted in described generator neutral point connection terminal case 0LHS901CR, and opens door and operate;

(7) described 6th key XY and the 9th XS is inserted into the 4th exchange box 0LHM001CV in release the tenth key HM1, open the 3rd isolating switch 0LHM003JA cabinet door of OLHM to 1 ~ 2# unit 9LHT, the dolly of described 3rd isolating switch is pushed away into;

(8) the 11 key 1X and the 12 2HT of 1 ~ 2# unit is taken out from main control room, and described 11 key 1X and the 12 key 2HT is inserted in the 5th exchange box 0LHM002CV, discharge the 13 key 2B, described 13 key 2B is inserted into the described 3rd isolating switch 0LHM003JA place of OLHM to 1 ~ 2# unit 9LHT, the described dolly of described 3rd isolating switch can being pushed into working position, now the 13 key 2B cannot extract;

(9) on cabinet door lock by the 3rd isolating switch 0LHM003JA described in 0LHM001TB to 1 ~ 2# unit 9LHT, discharge described tenth key HM1, described tenth key HM1 is inserted in the 4th exchange box 0LHM001CV and discharges described 6th key XY and the 9th key XS;

(10) with described 6th key XS, the described 2nd isolating switch 0LHM002JA of 0LHM001TB to 0LLT002TR is closed a floodgate, grounding switch tripping, locking grounding switch tripping position;

(11) by described generator being pressed excitation cabinet 0LHS952AR place lock, discharge described 7th key XB, described generator neutral point connection terminal case 0LHS901CR is locked, discharges described 8th key XV;

(12) by described 6th key XY, 7th key XB and the 8th key XV inserts in described 3rd exchange box 0LHM102CV, discharge described 5th key B, described 5th key B is inserted into described 0LHM001JA first isolating switch and unlocks combined floodgate, grounding switch locking point lock obtains described 4th key XP1, is inserted into by described 4th key XP1 in described 2nd exchange box 0LHM101CV and obtains described 3rd key XP;

(13) described 3rd key XP is inserted into described first exchange box 0LHS001CV in obtain described first key XC and the 2nd key XD; Described first key XC and the 2nd key XD is inserted in the described first starting air inlet valve 250VA and the 2nd starting air inlet valve 251VA of described diesel engine, unlock valve-off, open valve, now described first key XC and the 2nd key XD can pull out out, so that be sent to the blackout of instrument control case and master control room, described diesel generation system normal starting after receiving start signal.

4. for an interlocking gear for diesel generation system reserve power supply, comprise isolating switch, key and the exchange box mated mutually with key, it is characterised in that: described interlocking gear is according to following step operation:

(1) with from operation long the key 2HT taken, XU, described key 2HT and XU inserting key exchange box 9LHT003CV and rotates, described key 2HT, XU are caught, simultaneously key 11HT, and 12HT, 13HT, 14HT are released;

(2) the described key 11HT of release from working order 1,12HT, 13HT, 14HT and the described key 11X looked from operation, insertion key exchanges box 9LHT001CV, rotate described key 11X, 11HT, 12HT, 13HT, 14HT so that these keys are caught, key 9LHT2 is released simultaneously;

(3) described key 9LHT2 and the key ET1 collected from operation strong point being inserted into described oil electric engine incoming line cabinet exchanges box 9LHT101CV; Rotate described key 9LHT2, ET1, these two keys caught while key A1, A11 is released; Then unlocking this incoming line cabinet isolation car with described key A1, insertion isolation car, key BBT is released, and the car of this cabinet isolation simultaneously is locked in working position; Described key BBT, A11 are inserted central key box 9LHT002CV and rotates, obtain key 9LHT1; Key 1X is released and can be used for starter-generator simultaneously;

(4) open 05 cabinet door and remove isolation car; This isolation car is inserted 1LHA; Shut the cabinet door of 1LHA incoming line cabinet;

(5) inserting key ET2, the 3rd step operates the key 9LHT1 obtained, and the key 19HA that operation strong point obtains exchanges box 9LHT201CV to key; Rotating key ET2,9LHT1,19HA, while these 3 keys are caught, A2, A21 key is released;

(6) key A2 is inserted 02 cabinet isolation lock hole place and rotates, now isolate car unblock and can insert, after insertion isolation car, key A2 is caught, now key BBT can use, by key BBT, A21 is inserted into central key box 9LHT202CV and rotates, and these two keys are caught, and now key 12HT is released;

(7) key 12HT being inserted into key exchange box 9LHT203CV and rotates, this key is caught, and obtains key G simultaneously;

(8) key G being inserted into lockhole between 01 cabinet low pressure and rotate, now cabinet door can be opened and key is caught, and opens door between low pressure, is connected by Secondary socket 9LHT002PJ and 1LHA0012PJ plug;

(9) shut cabinet door between 01 cabinet low pressure, after lock Over-The-Counter door, obtain key G;

(10) reinsert key G and exchange box 9LHT203CV to key, rotate and obtain 12HT;

(11) in 1LHA bus section, extracting the 1LHA001JA in 1LGB out, release B, B inserts this cabinet exchange box and rotates, B is caught, and 2B, 3HA are released simultaneously; Key 2B and 3HA is kept in the long hand of operation to prevent having people that the isolating switch on side is injected this cabinet when falling electricity;

(12) in 1LHA bus section, extract 1LHA002JA, A out and it is released; Key A inserting this cabinet key exchange box and rotates, key A is caught, simultaneously key 1P and 1HA(1) it is released; By described key 1HA(1) insert 1LHA003JA key hole with described key 12HT and rotate, these 2 keys are caught simultaneously key D and are released; Described key D being inserted into 1LHA003JA circuit breaker cart key hole and rotates, 1LHA002JA is inserted into 1LHA003JA, after isolating switch inserts, key D is caught;

(13) after 1LHA isolating switch closes, the electrical connection of incoming line cabinet 9LHT and intermediate distribution system 1LHA has just been set up.

5. interlocking gear according to claim 4, it is characterised in that: described 1LGB normal power supply for station grounding switch key lock 6B is through the complicated switching device of 1LGB upstream, and when their circuit breaker cart is drawn out, key can be released; When a series of isolating switchs is drawn out of time, the key just having a series of correspondences is released; Time 1LHA circuit breaker cart is extracted out, 6B grounding switch key hole type lock is lived, and now grounding switch is in closing position.

6. interlocking gear according to the arbitrary item of claim 1-5, it is characterised in that: described air inlet valve and mouth air compressor starting valve are for controlling the startup of described diesel engine.

7. interlocking gear according to the arbitrary item of claim 1-5, it is characterised in that: described interlocking gear is used between switching cabinet and switching cabinet.

8. interlocking gear according to the arbitrary item of claim 1-5, it is characterised in that: described diesel generation system is the standby power supply of Nuclear power plants.

9. interlocking gear according to the arbitrary item of claim 1-5, it is characterised in that: described key is mechanical key.

10. interlocking gear according to the arbitrary item of claim 1-5, it is characterised in that: described exchange box has specific corresponding coding.