CN203301218U - Device used for gas turbine power plant circulating water MCC power source switching - Google Patents
Device used for gas turbine power plant circulating water MCC power source switching Download PDFInfo
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- CN203301218U CN203301218U CN2012207495764U CN201220749576U CN203301218U CN 203301218 U CN203301218 U CN 203301218U CN 2012207495764 U CN2012207495764 U CN 2012207495764U CN 201220749576 U CN201220749576 U CN 201220749576U CN 203301218 U CN203301218 U CN 203301218U
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Abstract
The utility model relates to a device used for gas turbine power plant circulating water MCC power source switching. The device used for gas turbine power plant circulating water MCC power source switching is characterized in that the device includes an MCC power source, an MCC power source switching device as well as a switch A and a switch B which are matched with the MCC power source; the MCC power source is connected with a bus 2 through the switch A and a switch Ax; the MCC power source is connected with a bus 3 through the switch B and a switch Bx; the switch-on interlocking logic of the switch A in the MCC power source switching device has a delay circuit structure so as to convert skipping signals of the switch A into 3-second delay signals from instantaneous signals, such that switch-on requirement signals can be formed; and the switch-on interlocking logic of the switch B in the MCC power source switching device has a delay circuit structure so as to convert skipping signals of the switch B into 3-second delay signals from instantaneous signals, such that switch-on requirement signals can be formed. According to the device of the utility model, the skipping signals of the switch A and the switch B are converted into the 3-second delay signals from the instantaneous signals, and therefore, the problem of in-situ switching off of the switch A or the switch B in the MCC power source switching device, and the problem of automatic switching on of the switch A and the switch B after non-fault trip can be avoided, and therefore, potential safety hazards in loop-connected parallel operation of the two buses of a circulating water MCC can be eliminated.
Description
Technical field
The utility model relates to a kind of be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, is 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.
The utility model content
The purpose of this utility model 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.
The purpose of this utility model 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 that matches 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, by instantaneous signal, change 3 seconds signals of time delay into, 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.
The beneficial effects of the utility model:
1, the utility model 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 utility model 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 the utility model MCC power transfer device.
Fig. 3 is the utility model A switch combined floodgate interlock logic figure.
Fig. 4 is the utility model MCC electrical source exchange inlet wire MT switch secondary connection diagram.
Embodiment
Below in conjunction with accompanying drawing, utility model is further described.
The dynamo-electric recirculated water MCC of the factory power transfer device of a kind of 9F level combustion as shown in Figure 2, Figure 3 and Figure 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, by the B switch, connects B section bus;
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, by in MCC electrical source exchange logic, differentiating two sections bus 2,3 voltages, 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.
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 (6)
1. 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 that matches with the MCC power supply, the B switch, MCC power supply (1) is connected with A section bus (2) with the Ax switch by the A switch, MCC power supply (1) is connected with B section bus (3) with the Bx switch by the B switch, 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, by instantaneous signal, change 3 seconds signals of time delay into, 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.
2. according to claim 1 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: No. 2 pin 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) with the other end of A switch, be connected, 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) end is connected, No. 4 pin of power monitoring relay J J is connected with power cathode-KM, (B1) of air relay ZKK, (A1), (C1), (21) end 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.
3. according to claim 2 be used to firing the device of the dynamo-electric recirculated water MCC of factory electrical source exchange, it is characterized in that: (187) of air relay ZKK, (81), (14), (32), (912) are connected with the positive pole of KKS coding, and (911) of air relay ZKK, (3111), (84), (184) are connected with the negative pole of KKS coding.
4. according to claim 2 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.
5. according to claim 1 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.
6. according to claim 1 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 |
|---|---|---|---|
| CN2012207495764U CN203301218U (en) | 2012-12-31 | 2012-12-31 | Device used for gas turbine power plant circulating water MCC power source switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207495764U CN203301218U (en) | 2012-12-31 | 2012-12-31 | Device used for gas turbine power plant circulating water MCC power source switching |
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| Publication Number | Publication Date |
|---|---|
| CN203301218U true CN203301218U (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207495764U Expired - Fee Related CN203301218U (en) | 2012-12-31 | 2012-12-31 | Device used for gas turbine power plant circulating water MCC power source switching |
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| CN (1) | CN203301218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414239A (en) * | 2012-12-31 | 2013-11-27 | 深圳市广前电力有限公司 | Gas turbine power plant circulating water MCC power supply switching method and apparatus |
-
2012
- 2012-12-31 CN CN2012207495764U patent/CN203301218U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414239A (en) * | 2012-12-31 | 2013-11-27 | 深圳市广前电力有限公司 | Gas turbine power plant circulating water MCC power supply switching method and apparatus |
| CN103414239B (en) * | 2012-12-31 | 2016-03-23 | 深圳市广前电力有限公司 | GTCC power plant recirculated water MCC power-supply switching method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20151231 |
|
| EXPY | Termination of patent right or utility model |