CN103414239B - GTCC power plant recirculated water MCC power-supply switching method and device - Google Patents

GTCC power plant recirculated water MCC power-supply switching method and device Download PDF

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Publication number
CN103414239B
CN103414239B CN201210593729.5A CN201210593729A CN103414239B CN 103414239 B CN103414239 B CN 103414239B CN 201210593729 A CN201210593729 A CN 201210593729A CN 103414239 B CN103414239 B CN 103414239B
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China
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switch
mcc
output
combined floodgate
power supply
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CN201210593729.5A
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CN103414239A (en
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朱丽萍
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SHENZHEN GUANGQIAN ELECTRIC POWER CO Ltd
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SHENZHEN GUANGQIAN ELECTRIC POWER CO Ltd
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Abstract

The present invention relates to GTCC power plant recirculated water MCC power-supply switching method and device, it is characterized in that: the A switch, the B switch that 1) connect MCC power supply, MCC power transfer device and match with MCC power supply, connect A section bus by A switch, connect B section bus by B switch; 2) for A, B switch after avoiding the tripping of A switch closes a floodgate simultaneously, change the jumping position signal of this switch in A switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal; For A, B switch after avoiding the tripping of B switch closes a floodgate simultaneously, change the jumping position signal of this switch in B switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal.The present invention by by A, B two the jumping position signal of switch change time delay into 3 seconds by instantaneous signal, to solve in MCC power transfer device A switch or B switch two switches all automatic closings after separating brake or jump on the spot, thus eliminate the potential safety hazard of recirculated water MCC two sections of bus cyclization paired runnings.

Description

GTCC power plant recirculated water MCC power-supply switching method and device
Technical field
The present invention relates to a kind of GTCC power plant recirculated water MCC power-supply switching method and device, be applicable to 9F level GTCC power plant recirculated water MCC electrical source exchange.Belong to power generation industries and auxiliary device technical field.
Background technology
In existing 9F level gas-steam combined unit, its unit type of cooling is generally once-though cooling, circulating pump room MCC has two-way power supply, for ensureing normal operation, adopt standby mode, i.e. a road job, a road is for subsequent use, when working power breakdown switch disconnects, stand-by power supply carries out switch and hauls oneself willingly into.
There are the following problems for existing circulating pump room MCC power transfer device breaker in middle interlock logic: (1) run switch is on the spot after manual brake separating or jump, backup circuit breaker is hauled oneself willingly into, the switch of just tripping can close again automatically simultaneously, causes two switch paired runnings, there is potential safety hazard.(2) busbar voltage long meeting switching time causes busbar voltage too low.Now with the public A of 380V main power house, B section is example by the A diverter switch of recirculated water MCC section, carry out manual brake separating or jump logic analysis on the spot, the existing combined floodgate interlock logic of A switch as shown in Figure 1, as can be seen from Figure 1, when after A switch on the spot manual brake separating or jump, the interlocking combined floodgate logical condition of B switch meets, B switch carries out automatic closing, simultaneously, before after the tripping of A switch, B switch does not close, A switch combined floodgate condition also meets simultaneously, so A switch can carry out automatic closing again simultaneously, two switches are caused all to carry out automatic closing like this, two switches all successful situations of automatic closing may be there is, cause the public A of 380V main power house, B section is by recirculated water MCC section Electromagnetic coupling.
Summary of the invention
An object of the present invention is to provide a kind of GTCC power plant recirculated water MCC power-supply switching method.
Object two of the present invention is to provide a kind of device for GTCC power plant recirculated water MCC electrical source exchange.This MCC power transfer device has reliability and workable, can two switches automatic closing simultaneously, reduces the potential safety hazard of recirculated water MCC two sections of bus cyclization paired runnings, ensures the reliable switching of two sections of buses.
An object of the present invention can be achieved through the following technical solutions:
GTCC power plant recirculated water MCC power-supply switching method, is characterized in that:
1) the A switch, the B switch that connect MCC power supply, MCC power transfer device and match with MCC power supply, connect A section bus by A switch, connects B section bus by B switch;
2) for A, B switch after avoiding the tripping of A switch closes a floodgate simultaneously, change the jumping position signal of this switch in A switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal; For A, B switch after avoiding the tripping of B switch closes a floodgate simultaneously, change the jumping position signal of this switch in B switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal.
An object of the present invention can also be achieved through the following technical solutions:
Further: in order to avoid, A, B two sections of busbar voltages are too low causes accident chaser, will differentiate in MCC electrical source exchange logic that A, B two sections of busbar voltages are carried out electrical source exchange time delay and changed 0.5 second lower than jumping this side switch after 150V into by 2.5 seconds.
Two of object of the present invention can be achieved through the following technical solutions:
For the device of GTCC power plant recirculated water MCC electrical source exchange, its design feature is: comprise MCC power supply, MCC power transfer device and the A switch matched with MCC power supply, B switch, MCC power supply 1 is connected with A section bus two with Ax switch by A switch, MCC power supply 1 is by B switch and Bx switch and B section bus three-phase, in MCC power transfer device, A switch combined floodgate interlock logic has delay circuit structure, to change the jumping position signal of this switch into time delay 3 seconds signals by instantaneous signal, meet combined floodgate conditioned signal, in MCC power transfer device, B switch combined floodgate interlock logic has delay circuit structure, time delay 3 seconds signals are changed into by instantaneous signal with the jumping position signal of this switch, meet combined floodgate conditioned signal.
Further, the B2 end of the pin 2 of power monitoring relay J J, one end of auxiliary relay 4ZJ, air relay ZKK, one end of A switch, two indicator light HD, LD one end are connected with circuit breaker F1 respectively, be connected by circuit breaker F1 and be connected with positive source+KM, the A2 end of air relay ZKK is connected with the other end of A switch by two KKS codings 103,133 with C2 end, the other end of auxiliary relay 4ZJ is held with the B3 of air relay ZKK and is connected, and two indicator light HD, LD other ends are connected with 22,24 ends of air relay ZKK respectively; The pin 4 of power monitoring relay J J is connected with power cathode-KM, B1, the A1 of air relay ZKK, C1,21 ends are connected with power cathode-KM, for controlling DC circuit device, power monitoring, energy storage instruction, air circuit energy storage, combined floodgate, shunted exciter tripping, combined floodgate instruction, separating brake instruction.
Further, 187,81,14,32,912 of air relay ZKK is connected with the positive pole that KKS encodes, and 911,3111,84,184 of air relay ZKK is connected with the negative pole that KKS encodes.
Further, air relay ZKK by terminal JX and DCS model calling, by the spring energy-storage of DCS module protection action tripping operation, protection warning, running status, gate-dividing state, test position, the disappearance of control power supply and air circuit.
Further, carry out priority by two KKS coding 103,133 control signals to control to realize switch A or B combined floodgate and separating brake.
Further, described MCC power supply is circulating water pump power supply, and MCC supply voltage is 110V, and described two KKS codes are respectively 01BLOOGS101 and 01BLOOGS102.
Further, described MCC power supply can Shi Jikong building air conditioner MCC section inlet wire.
Beneficial effect of the present invention:
1, the present invention by by A, B two the jumping position signal of switch change time delay into 3 seconds by instantaneous signal, to solve in MCC power transfer device A switch or B switch two switches all automatic closings after separating brake or jump on the spot, thus eliminate the potential safety hazard of recirculated water MCC two sections of bus cyclization paired runnings.
2, the present invention changed 0.5 second by A, B two sections of busbar voltages are carried out electrical source exchange time delay lower than this side switch of jumping during 150V into by 2.5 seconds, solve the problem of A, B two sections of low overlong time of busbar voltage in MCC power transfer device, ensure that the reliable switching of MCC power supply A, B two sections of buses.
Accompanying drawing explanation
Fig. 1 is prior art A switch combined floodgate interlock logic figure.
Fig. 2 is the circuit structure diagram of MCC power transfer device of the present invention.
Fig. 3 is A switch combined floodgate interlock logic figure of the present invention.
Fig. 4 is MCC electrical source exchange inlet wire MT switch secondary connection diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, invention is further described.
As Fig. 2, Fig. 3, a kind of 9F level GTCC power plant recirculated water MCC power transfer device of Fig. 4, its MCC power-supply switching method, is characterized in that comprising the steps:
1) the A switch, the B switch that connect MCC power supply, MCC power transfer device and match with MCC power supply, connect A section bus by A switch, connects B section bus by B switch;
2) for A, B switch after avoiding the tripping of A switch closes a floodgate simultaneously, change the jumping position signal of this switch in A switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal; For A, B switch after avoiding the tripping of B switch closes a floodgate simultaneously, change the jumping position signal of this switch in B switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal.
The device for GTCC power plant recirculated water MCC electrical source exchange that the present embodiment relates to, comprise MCC power supply 1, MCC power supply 1 is connected with A section bus 2 with Ax switch by A switch, MCC power supply 1 is by B switch and Bx switch and B section bus 3 phase, for A, B switch after avoiding the tripping of A switch closes a floodgate simultaneously, change the jumping position signal of this switch in A switch combined floodgate interlock logic in MCC power transfer device into time delay 3 seconds signals by instantaneous signal, meet combined floodgate conditioned signal; For A, B switch after avoiding the tripping of B switch closes a floodgate simultaneously, change the jumping position signal of this switch in B switch combined floodgate interlock logic in MCC power transfer device into time delay 3 seconds signals by instantaneous signal, meet combined floodgate conditioned signal.
For avoiding A, B two sections of buses 2,3 brownout to cause accident chaser, will differentiate in MCC electrical source exchange logic that two sections of bus 2,3 voltages carry out electrical source exchange time delay and changed 0.5 second lower than jumping this side switch after 150V into by 2.5 seconds.
Described MCC power supply is circulating water pump power supply.
The B2 end of the pin 2 of power monitoring relay J J, one end of auxiliary relay 4ZJ, air relay ZKK, one end of A switch, two indicator light HD, LD one end are connected with circuit breaker F1 respectively, be connected by circuit breaker F1 and be connected with positive source+KM, the A2 end of air relay ZKK is connected with the other end of A switch by two KKS codings 103,133 with C2 end, the other end of auxiliary relay 4ZJ is held with the B3 of air relay ZKK and is connected, and two indicator light HD, LD other ends are connected with 22,24 ends of air relay ZKK respectively; The pin 4 of power monitoring relay J J is connected with power cathode-KM, B1, the A1 of air relay ZKK, C1,21 ends are connected with power cathode-KM, for controlling DC circuit device, power monitoring, energy storage instruction, air circuit energy storage, combined floodgate, shunted exciter tripping, combined floodgate instruction, separating brake instruction.
187,81,14,32,912 of air relay ZKK is connected with the positive pole that KKS encodes, and 911,3111,84,184 of air relay ZKK is connected with the negative pole that KKS encodes.
Air relay ZKK by terminal JX and DCS model calling, by the spring energy-storage of DCS module protection action tripping operation, protection warning, running status, gate-dividing state, test position, the disappearance of control power supply and air circuit.
Carry out priority by two KKS coding 103,133 control signals to control to realize switch A or B combined floodgate and separating brake.
Described MCC power supply is circulating water pump power supply, and MCC supply voltage is 110V, and described two KKS codes are respectively 01BLOOGS101 and 01BLOOGS102.
Described MCC power supply can Shi Jikong building air conditioner MCC section inlet wire.

Claims (5)

1. GTCC power plant recirculated water MCC power-supply switching method, is characterized in that:
1) the A switch, the B switch that connect MCC power supply (1), MCC power transfer device and match with MCC power supply (1), connect A section bus by A switch, connects B section bus by B switch;
2) for A, B switch after avoiding the tripping of A switch closes a floodgate simultaneously, change the jumping position signal of this switch in A switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal; For A, B switch after avoiding the tripping of B switch closes a floodgate simultaneously, change the jumping position signal of this switch in B switch combined floodgate interlock logic in MCC power transfer device into time delay 3S by instantaneous signal and meet combined floodgate conditioned signal.
2. GTCC power plant recirculated water MCC power-supply switching method according to claim 1, it is characterized in that: A, B two sections of busbar voltages are too low causes accident chaser in order to avoid, will differentiate in MCC electrical source exchange logic that A, B two sections of busbar voltages are carried out electrical source exchange time delay and changed 0.5 second lower than jumping this side switch after 150V into by 2.5 seconds.
3. for the device of GTCC power plant recirculated water MCC electrical source exchange, it is characterized in that: comprise MCC power supply (1), MCC power transfer device and the A switch matched with MCC power supply (1), B switch, MCC power supply (1) is connected with A section bus (2) with Ax switch by A switch, MCC power supply (1) is connected with B section bus (3) with Bx switch by B switch, in MCC power transfer device, A switch combined floodgate interlock logic has delay circuit structure, to change the jumping position signal of this switch into time delay 3 seconds signals by instantaneous signal, meet combined floodgate conditioned signal, in MCC power transfer device, B switch combined floodgate interlock logic has delay circuit structure, time delay 3 seconds signals are changed into by instantaneous signal with the jumping position signal of this switch, meet combined floodgate conditioned signal, the positive pole pin 2 of power monitoring relay J J, one end of auxiliary relay 4ZJ, the output B2 of air relay ZKK, one end of A switch, two indicator light HD, LD one end is connected with circuit breaker F1 respectively, be connected by circuit breaker F1 and be connected with positive source+KM, the output terminals A 2 of air relay ZKK and output C2 are by two KKS codings 103, 133 are connected with the other end of A switch, the other end of auxiliary relay 4ZJ is connected with the output B3 of air relay ZKK, two indicator light HD, the LD other end respectively with the output 22 of air relay ZKK, output 24 is connected, the negative pole pin 4 of power monitoring relay J J is connected with power cathode-KM, the output B1 of air relay ZKK, output terminals A 1, output C1, output 21 are connected with power cathode-KM, for controlling DC circuit device, power monitoring, energy storage instruction, air circuit energy storage, combined floodgate, shunted exciter tripping, combined floodgate instruction, separating brake instruction, the positive pole that the output 187 of air relay ZKK, output 81, output 14, output 32, output 912 are encoded with KKS is connected, and the negative pole that the output 911 of air relay ZKK, output 3111, output 84, output 184 are encoded with KKS is connected, air relay ZKK by inserting terminal JX and DCS model calling, by the spring energy-storage of DCS module protection action tripping operation, protection warning, running status, gate-dividing state, test position, the disappearance of control power supply and air circuit, carry out priority by two KKS coding 103,133 control signals to control to realize switch A or B combined floodgate and separating brake.
4. the device for GTCC power plant recirculated water MCC electrical source exchange according to claim 3, it is characterized in that: described MCC power supply (1) is circulating water pump power supply, MCC power supply (1) voltage is 110V, and described two KKS coding is respectively 01BLOOGS101 and 01BLOOGS102.
5. the device for GTCC power plant recirculated water MCC electrical source exchange according to claim 3, is characterized in that: described MCC power supply (1) Shi Jikong building air conditioner MCC section inlet wire.
CN201210593729.5A 2012-12-31 2012-12-31 GTCC power plant recirculated water MCC power-supply switching method and device Expired - Fee Related CN103414239B (en)

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CN115249966A (en) * 2021-04-28 2022-10-28 华能北京热电有限责任公司 Peripheral bus power interlocking protection configuration system of gas turbine power plant

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CN102545375A (en) * 2012-01-17 2012-07-04 中国华电工程(集团)有限公司 Automatic switching on/off method for emergency power supply of power plant
CN203301218U (en) * 2012-12-31 2013-11-20 深圳市广前电力有限公司 Device used for gas turbine power plant circulating water MCC power source switching

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