CN103414239A - Gas turbine power plant circulating water MCC power supply switching method and apparatus - Google Patents
Gas turbine power plant circulating water MCC power supply switching method and apparatus Download PDFInfo
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- CN103414239A CN103414239A CN2012105937295A CN201210593729A CN103414239A CN 103414239 A CN103414239 A CN 103414239A CN 2012105937295 A CN2012105937295 A CN 2012105937295A CN 201210593729 A CN201210593729 A CN 201210593729A CN 103414239 A CN103414239 A CN 103414239A
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Abstract
The invention relates to a gas turbine power plant circulating water MCC power supply switching method and apparatus. The gas turbine power plant circulating water MCC power switching method and apparatus are characterized by a step 1) of connecting an MCC power supply, an MCC power supply switching device, and a switch A and a switch B that are paired with the MCC power supply, connecting a bus segment A through the switch A and connecting a bus segment B through the switch B; and a step 2) of changing a jump signal of the switch A in a switch A closing interlocking logic in the MCC power supply switching device from a instantaneous signal to a delay 3S satisfying closing condition signal so as to avoid the closing of the switch A and the switch B when the switch A jumps, and changing a jump signal of the switch B in a switch B closing interlocking logic in the MCC power supply switching device from a instantaneous signal to a delay 3S satisfying closing condition signal so as to avoid the closing of the switch A and the switch B when the switch B jumps. According to the invention, the jump signals of the switch A and the switch B are changed from instantaneous signals to a delay of 3 seconds, so the problem is solved that the switch A and the switch B automatically switch on after local tripping or secret jumping of the switch A or the switch B in the MCC power supply switching device, and therefore safety risks are eliminated in closed loop and parallel operation of two circulating water MCC bus segments.
Description
Technical field
The present invention relates to a kind of combustion dynamo-electric factory recirculated water MCC power-supply switching method and device, be applicable to the dynamo-electric recirculated water MCC of the factory electrical source exchange of 9F level combustion.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 the two-way power supply, for guaranteeing normal operation, adopt standby mode ，Ji mono-tunnel work, a road is standby, when the working power breakdown switch disconnected, stand-by power supply carried out switch and hauls oneself willingly into.
In existing circulating pump room MCC power transfer device, there are the following problems for the switch 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, has 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, the 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 the A switch on the spot after manual brake separating or jump, the interlocking combined floodgate logical condition of B switch meets, the B switch carries out automatic closing, simultaneously, before the B switch does not close after the tripping of A switch, A switch combined floodgate condition also meets simultaneously, so the A switch can carry out automatic closing simultaneously again, cause like this two switches all to carry out automatic closing, may there be all situations of automatic closing success of two switches, caused the public A of 380V main power house, the B section is by recirculated water MCC section cyclization operation.
Summary of the invention
One of purpose of the present invention is for a kind of combustion recirculated water MCC of dynamo-electric factory power-supply switching method is provided.
Two of purpose of the present invention is in order to provide a kind of be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange.This MCC power transfer device has reliability and workable, can two switch automatic closings simultaneously, reduce the potential safety hazard of two sections bus cyclization paired runnings of recirculated water MCC, guarantee the reliable switching of two sections buses.
One of purpose of the present invention can be achieved through the following technical solutions:
Fire the dynamo-electric recirculated water MCC of factory power-supply switching method, it is characterized in that:
1) the A switch, the B switch that connect MCC power supply, MCC power transfer device and match with the MCC power supply, connect A section bus by the A switch, connects B section bus by the B switch;
2) for avoiding A after the tripping of A switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in A switch combined floodgate interlock logic in the MCC power transfer device into time delay 3S and meet the combined floodgate conditioned signal; For avoiding A after the tripping of B switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in B switch combined floodgate interlock logic in the MCC power transfer device into time delay 3S and meet the combined floodgate conditioned signal.
One of purpose of the present invention can also be achieved through the following technical solutions:
Further: for avoiding A, the too low accident chaser that causes of two sections busbar voltages of B, jump this side switch after lower than 150V and carry out the electrical source exchange time delay and changed 0.5 second into by 2.5 seconds in MCC electrical source exchange logic, differentiating A, two sections busbar voltages of B.
Two of purpose of the present invention can be achieved through the following technical solutions:
For firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, its design feature is: comprise the MCC power supply, MCC power transfer device and the A switch matched with the MCC power supply, the B switch, MCC power supply 1 is connected with A section bus two with the Ax switch by the A switch, MCC power supply 1 is by B switch and Bx switch and B section bus three-phase, in the MCC power transfer device, A switch combined floodgate interlock logic has the delay circuit structure, with the jumping position signal by this switch, change 3 seconds signals of time delay into by instantaneous signal, meet the combined floodgate conditioned signal, in the MCC power transfer device, B switch combined floodgate interlock logic has the delay circuit structure, jumping position signal with this switch changes 3 seconds signals of time delay into by instantaneous signal, meet the combined floodgate conditioned signal.
Further, the B2 end of the pin 2 of power monitoring relay J J, the end of auxiliary relay 4ZJ, air relay ZKK, an end of A switch, two indicator light HD, LD mono-ends are connected with circuit breaker F1 respectively, by circuit breaker F1, be connected 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 the C2 end, the other end of auxiliary relay 4ZJ is connected with the B3 end of air relay ZKK, and two indicator light HD, the 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, be used to controlling DC circuit device, power monitoring, energy storage indication, air circuit energy storage, combined floodgate, shunted exciter tripping, combined floodgate indication, separating brake indication.
Further, 187,81,14,32,912 of air relay ZKK is connected with the positive pole of KKS coding, and 911,3111,84,184 of air relay ZKK is connected with the negative pole of KKS coding.
Further, air relay ZKK is connected with the DCS module by terminal JX, 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, by two KKS coding 103,133 control signals, carry out priority control and realize that switch A or B close a floodgate and separating brake.
Further, described MCC power supply is the circulating water pump power supply, and the 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 changed time delay into 3 seconds by the jumping position signal by A, B two switches by instantaneous signal, solve in the MCC power transfer device A switch or B switch two switches automatic closing all after separating brake or jump on the spot, thereby eliminated the potential safety hazard of two sections bus cyclization paired runnings of recirculated water MCC.
2, the present invention is by this side of the jumping switch during lower than 150V carries out the electrical source exchange time delay and changed 0.5 second into by 2.5 seconds by A, two sections busbar voltages of B, solve the problem of the low overlong time of A in the MCC power transfer device, two sections busbar voltages of B, guaranteed the reliable switching of MCC power supply A, two sections buses of B.
The 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,, the dynamo-electric recirculated water MCC of the factory power transfer device of a kind of 9F level combustion 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 the MCC power supply, connect A section bus by the A switch, connects B section bus by the B switch;
2) for avoiding A after the tripping of A switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in A switch combined floodgate interlock logic in the MCC power transfer device into time delay 3S and meet the combined floodgate conditioned signal; For avoiding A after the tripping of B switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in B switch combined floodgate interlock logic in the MCC power transfer device into time delay 3S and meet the combined floodgate conditioned signal.
The present embodiment relate to be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, comprise that MCC power supply 1, MCC power supply 1 are connected with A section bus 2 with the Ax switch by the A switch, MCC power supply 1 is by B switch and Bx switch and B section bus 3 phases, for avoiding A after the tripping of A switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in A switch combined floodgate interlock logic in the MCC power transfer device into time delay 3 seconds signals, meet the combined floodgate conditioned signal; For avoiding A after the tripping of B switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in B switch combined floodgate interlock logic in the MCC power transfer device into time delay 3 seconds signals, meet the combined floodgate conditioned signal.
For avoiding A, two sections buses of B, 2,3 brownouts to cause the accident chaser, jump this side switch after lower than 150V and carry out the electrical source exchange time delay and changed 0.5 second into by 2.5 seconds in MCC electrical source exchange logic, differentiating two sections bus 2,3 voltages.
Described MCC power supply is the circulating water pump power supply.
The B2 end of the pin 2 of power monitoring relay J J, the end of auxiliary relay 4ZJ, air relay ZKK, an end of A switch, two indicator light HD, LD mono-ends are connected with circuit breaker F1 respectively, by circuit breaker F1, be connected 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 the C2 end, the other end of auxiliary relay 4ZJ is connected with the B3 end of air relay ZKK, and two indicator light HD, the 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, be used to controlling DC circuit device, power monitoring, energy storage indication, air circuit energy storage, combined floodgate, shunted exciter tripping, combined floodgate indication, separating brake indication.
187,81,14,32,912 of air relay ZKK is connected with the positive pole of KKS coding, and 911,3111,84,184 of air relay ZKK is connected with the negative pole of KKS coding.
Air relay ZKK is connected with the DCS module by terminal JX, 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.
By two KKS coding 103,133 control signals, carry out priority control and realize that switch A or B close a floodgate and separating brake.
Described MCC power supply is the circulating water pump power supply, and the 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 (9)
1. fire the dynamo-electric recirculated water MCC of factory power-supply switching method, it is characterized in that:
1) the A switch, the B switch that connect MCC power supply, MCC power transfer device and match with the MCC power supply, connect A section bus by the A switch, connects B section bus by the B switch;
2) for avoiding A after the tripping of A switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in A switch combined floodgate interlock logic in the MCC power transfer device into time delay 3S and meet the combined floodgate conditioned signal; For avoiding A after the tripping of B switch, B switch to close a floodgate simultaneously, by instantaneous signal, change the jumping position signal of this switch in B switch combined floodgate interlock logic in the MCC power transfer device into time delay 3S and meet the combined floodgate conditioned signal.
2. the recirculated water MCC of the dynamo-electric factory of combustion according to claim 1 power-supply switching method, it is characterized in that: for avoiding A, the too low accident chaser that causes of two sections busbar voltages of B, jump this side switch after lower than 150V and carry out the electrical source exchange time delay and changed 0.5 second into by 2.5 seconds in MCC electrical source exchange logic, differentiating A, two sections busbar voltages of B.
3. be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: comprise the MCC power supply, MCC power transfer device and the A switch matched with the MCC power supply, the B switch, MCC power supply 1 is connected with A section bus two with the Ax switch by the A switch, MCC power supply (1) is by B switch and Bx switch and B section bus three-phase, in the MCC power transfer device, A switch combined floodgate interlock logic has the delay circuit structure, with the jumping position signal by this switch, change 3 seconds signals of time delay into by instantaneous signal, meet the combined floodgate conditioned signal, in the MCC power transfer device, B switch combined floodgate interlock logic has the delay circuit structure, jumping position signal with this switch changes 3 seconds signals of time delay into by instantaneous signal, meet the combined floodgate conditioned signal.
4. according to claim 3 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: the pin 2 of power monitoring relay J J, the end of auxiliary relay 4ZJ, the B2 end of air relay ZKK, one end of A switch, two indicator light HD, LD mono-end is connected with circuit breaker F1 respectively, by circuit breaker F1, be connected and be connected with positive source+KM, the A2 end of air relay ZKK and C2 end 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 B3 end of air relay ZKK, two indicator light HD, the LD other end respectively with 22 of air relay ZKK, 24 ends are connected, 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, be used to controlling DC circuit device, power monitoring, energy storage indication, air circuit energy storage, combined floodgate, shunted exciter tripping, combined floodgate indication, separating brake indication.
5. according to claim 3 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: 187,81,14,32,912 of air relay ZKK is connected with the positive pole of KKS coding, and 911,3111,84,184 of air relay ZKK is connected with the negative pole of KKS coding.
6. according to claim 3 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange; it is characterized in that: air relay ZKK is connected with the DCS module by terminal JX, 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.
7. according to claim 3 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: by two KKS coding 103,133 control signals, carry out priority control and realize that switch A or B close a floodgate and separating brake.
8. according to claim 3 it is characterized in that: described MCC power supply is the circulating water pump power supply be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, and the MCC supply voltage is 110V, and described two KKS codes are respectively 01BLOOGS101 and 01BLOOGS102.
9. according to claim 3 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: described MCC power supply can Shi Jikong building air conditioner MCC section inlet wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210593729.5A CN103414239B (en) | 2012-12-31 | 2012-12-31 | GTCC power plant recirculated water MCC power-supply switching method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210593729.5A CN103414239B (en) | 2012-12-31 | 2012-12-31 | GTCC power plant recirculated water MCC power-supply switching method and device |
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| Publication Number | Publication Date |
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| CN103414239A true CN103414239A (en) | 2013-11-27 |
| CN103414239B CN103414239B (en) | 2016-03-23 |
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| CN201210593729.5A Expired - Fee Related CN103414239B (en) | 2012-12-31 | 2012-12-31 | GTCC power plant recirculated water MCC power-supply switching method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| JPH0919085A (en) * | 1995-06-28 | 1997-01-17 | Fujitsu Ltd | Power supply switching circuit |
| US7345380B2 (en) * | 2003-10-24 | 2008-03-18 | Uis Abler Electronics Co., Ltd. | Backup power supply system with a null transfer time |
| 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 |
-
2012
- 2012-12-31 CN CN201210593729.5A patent/CN103414239B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0919085A (en) * | 1995-06-28 | 1997-01-17 | Fujitsu Ltd | Power supply switching circuit |
| US7345380B2 (en) * | 2003-10-24 | 2008-03-18 | Uis Abler Electronics Co., Ltd. | Backup power supply system with a null transfer time |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 苗世华等: "工业企业电源快速切换装置在低压母线的应用", 《电力***保护与控制》, vol. 39, no. 6, 16 March 2011 (2011-03-16), pages 76 - 79 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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