CN203339666U - Generator-transformer unit protection loop - Google Patents
Generator-transformer unit protection loop Download PDFInfo
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- CN203339666U CN203339666U CN2013203222743U CN201320322274U CN203339666U CN 203339666 U CN203339666 U CN 203339666U CN 2013203222743 U CN2013203222743 U CN 2013203222743U CN 201320322274 U CN201320322274 U CN 201320322274U CN 203339666 U CN203339666 U CN 203339666U
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- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 230000009466 transformation Effects 0.000 claims description 27
- 230000000903 blocking effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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Abstract
The utility model relates to a generator-transformer unit protection loop. In the prior art, the structure is complex and control logic is complicated. By using the loop of the utility model, the above problems are solved. A technical scheme is characterized in that a first direct-current power supply successively passes through a B-phase auxiliary contact of a generator-transformer motor unit protection switch blade, a C-phase auxiliary contact of the generator-transformer motor unit protection switch blade and a coil of a relay K0001 so as to form a loop; a second direct-current power supply successively passes through an A-phase auxiliary contact of the generator-transformer motor unit protection switch blade and a coil of a relay K0011 so as to form a loop; a third direct-current power supply is connected with a shutting matrix through a first contact of the relay K0001; a first contact of the relay K0011 is connected in parallel with the first contact of the relay K0001; the third direct-current power supply is connected with a first input terminal of a monitoring system through a second contact of the relay K0001; the third direct-current power supply is connected with a second input terminal of the monitoring system through a second contact of the relay K0011; the monitoring system outputs a signal to an upper computer of the generator-transformer motor unit. The structure of the loop of the utility model is simple, the logic is simple too and motion is reasonable.
Description
Technical field
The utility model is a kind of electic protection loop, particularly relates to a kind of transformer unit protection loop.
Background technology
What power transformation generator protection device will be done is the operation that helps to send out power transformation unit better and safer; need to carry out a large amount of safety detection, in order to escape magnetizing inrush current, once not escape magnetizing inrush current; will cause the situations such as main transformer overcurrent protection action, further work and the operation of power transformation unit sent out in impact.
China Patent Publication No.: CN 102457048A, open day on May 16th, 2012, a kind of overvoltage protection device of wind driven generator set converter is disclosed, comprise the precision resistance bleeder circuit, reference source circuit independently, voltage hysteresis comparison circuit, high/low-voltage isolation circuit, failure alarm circuit, and DC-DC power supply is that DC/DC and low pressure difference linear voltage regulator are that the LDO modular circuit forms, its feature with, by described precision resistance bleeder circuit, to after the high voltage dividing potential drop, become low-voltage, described low-voltage and described reference source circuit are relatively, if higher than a reference source voltage, by described voltage hysteresis comparison circuit output low level, if lower than a reference source voltage, described hysteresis comparison circuit output high level, by described high/low-voltage isolation circuit and described failure alarm circuit, fault-signal is sent to wind generating set main control system, master control system is by reading described fault-signal, judge that whether the current transformer busbar voltage is too high.This technical scheme is also transformer unit protection loop, but the obvious structure of this technical scheme is too complicated.
The utility model content
The purpose of this utility model is to have complex structure for solving current technical scheme, and the problem that control logic is numerous and diverse, provide a kind of simple in structure, control logic transformer unit protection accurately loop.
The utility model solves the technical scheme that its technical problem adopts: a kind of transformer unit protection loop, send out the protection of power transformation unit secondary side for power plant, comprise the first DC power supply, the second DC power supply, the 3rd DC power supply, send out power transformation generator protection plug-in strip A phase auxiliary contact, send out power transformation generator protection plug-in strip B phase auxiliary contact and send out power transformation generator protection plug-in strip C phase auxiliary contact, the locking matrix, supervisory control system and relay K 0001, relay K 0011, described the first DC power supply is successively by sending out power transformation generator protection plug-in strip B phase auxiliary contact, the coil of sending out power transformation generator protection plug-in strip C phase auxiliary contact and relay K 0001 forms loop, described the second DC power supply forms loop by the coil of sending out power transformation generator protection plug-in strip A phase auxiliary contact and relay K 0011 successively, described the 3rd DC power supply is connected with the locking matrix by the first contact of relay K 0001, the first contact of described relay K 0011 is in parallel with the first contact of described relay K 0001, the 3rd DC power supply is connected with the first input end of supervisory control system by the second contact of relay K 0001, the 3rd DC power supply also is connected with the second input of supervisory control system by the second contact of relay K 0011, described supervisory control system outputs signal to the host computer of sending out the power transformation unit.The utility model arranges like this, and the locked loop redundancy increases reliability, by former independent contact protection, become the double loop with redundancy, and the mode that has increased auxiliary relay, the parallel connection of auxiliary relay output contact is gone locking; C phase auxiliary contact is for newly-increased locked loop, then goes here and there a newly-increased auxiliary relay, after auxiliary relay output contact and the parallel connection of former locked loop auxiliary relay output contact, inputs to the protective device locking.After each each locked loop redundant configuration of group protection, after two blocking relays are respectively exported an auxiliary contact, deliver to supervisory control system, increase the alarming logic loop of mistake locking and locked loop tripping and realize sending on signal in supervisory control system.The signal locking that only meets control logic just can be exported correct triggering signal.
As preferably, described the first DC power supply, the second DC power supply and the 3rd DC power supply are respectively three and independently draw the dish from the alternating current-direct current distribution board GA04 of unit.Three DC power supply are all independent current sources, have guaranteed the independent reliability service between each loop.
As preferably, also comprise diode D1 and diode D2, described diode D1 is in parallel with relay K 0011, the negative electrode of described diode D1 is connected with the positive pole of the first DC power supply, the anode of described diode D1 is connected with the negative pole of the first DC power supply, described diode D2 is in parallel with relay K 0001, and the negative electrode of described diode D2 is connected with the positive pole of the second DC power supply, and the anode of described diode D2 is connected with the negative pole of the second DC power supply.Diode D1 and diode D2, as fly-wheel diode, have prevented that relay is reversed the possibility punctured, and has improved the element fail safe.
As preferably, described supervisory control system is XOR monitoring output system.
Substantial effect of the present utility model is: the utility model is simple in structure, and control logic accurately and other equipment no-floats of Hydropower Unit.
The accompanying drawing explanation
Fig. 1 is a kind of circuit theory schematic diagram of the present utility model.
In figure: 1, the first DC power supply, the 2, second DC power supply, the 3, the 3rd DC power supply, 4, the locking matrix, 5, supervisory control system.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
A kind of transformer unit protection loop (referring to accompanying drawing 1), send out the protection of power transformation unit secondary side for power plant, comprise the first DC power supply 1, the second DC power supply 2, the 3rd DC power supply 3, send out power transformation generator protection plug-in strip A phase auxiliary contact SA, send out power transformation generator protection plug-in strip B phase auxiliary contact SB and send out power transformation generator protection plug-in strip C phase auxiliary contact SC, locking matrix 4, supervisory control system 5 and relay K 0001, relay K 0011, described the first DC power supply is successively by sending out power transformation generator protection plug-in strip B phase auxiliary contact, the coil of sending out power transformation generator protection plug-in strip C phase auxiliary contact and relay K 0001 forms loop, described the second DC power supply forms loop by the coil of sending out power transformation generator protection plug-in strip A phase auxiliary contact and relay K 0011 successively, described the 3rd DC power supply is connected with the locking matrix by the first contact of relay K 0001, the first contact of described relay K 0011 is in parallel with the first contact of described relay K 0001, the 3rd DC power supply is connected with the first input end of supervisory control system by the second contact of relay K 0001, the 3rd DC power supply also is connected with the second input of supervisory control system by the second contact of relay K 0011, described supervisory control system outputs signal to the host computer of sending out the power transformation unit.Described the first DC power supply, the second DC power supply and the 3rd DC power supply are respectively three and independently draw the dish from the alternating current-direct current distribution board GA04 of unit.Also comprise diode D1 and diode D2, described diode D1 is in parallel with relay K 0011, the negative electrode of described diode D1 is connected with the positive pole of the first DC power supply, the anode of described diode D1 is connected with the negative pole of the first DC power supply, described diode D2 is in parallel with relay K 0001, the negative electrode of described diode D2 is connected with the positive pole of the second DC power supply, and the anode of described diode D2 is connected with the negative pole of the second DC power supply.Described supervisory control system is XOR monitoring output system.
The present embodiment locked loop redundancy, increase reliability, by former independent contact protection, become the double loop with redundancy, and the mode that has increased auxiliary relay, the parallel connection of auxiliary relay output contact is gone locking; C phase auxiliary contact is for newly-increased locked loop, then goes here and there a newly-increased auxiliary relay, after auxiliary relay output contact and the parallel connection of former locked loop auxiliary relay output contact, inputs to the protective device locking.After each each locked loop redundant configuration of group protection, after two blocking relays are respectively exported an auxiliary contact, deliver to supervisory control system, increase the alarming logic loop of mistake locking and locked loop tripping and realize sending on signal in supervisory control system.The signal locking that only meets control logic just can be exported correct triggering signal.Diode D1 and diode D2, as fly-wheel diode, have prevented that relay is reversed the possibility punctured, and has improved the element fail safe.
Above-described embodiment is a kind of preferably scheme of the present utility model, not the utility model is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (4)
1. a transformer unit is protected loop, send out the protection of power transformation unit secondary side for power plant, it is characterized in that: comprise the first DC power supply, the second DC power supply, the 3rd DC power supply, send out power transformation generator protection plug-in strip A phase auxiliary contact, send out power transformation generator protection plug-in strip B phase auxiliary contact and send out power transformation generator protection plug-in strip C phase auxiliary contact, the locking matrix, supervisory control system and relay K 0001, relay K 0011, described the first DC power supply is successively by sending out power transformation generator protection plug-in strip B phase auxiliary contact, the coil of sending out power transformation generator protection plug-in strip C phase auxiliary contact and relay K 0001 forms loop, described the second DC power supply forms loop by the coil of sending out power transformation generator protection plug-in strip A phase auxiliary contact and relay K 0011 successively, described the 3rd DC power supply is connected with the locking matrix by the first contact of relay K 0001, the first contact of described relay K 0011 is in parallel with the first contact of described relay K 0001, the 3rd DC power supply is connected with the first input end of supervisory control system by the second contact of relay K 0001, the 3rd DC power supply also is connected with the second input of supervisory control system by the second contact of relay K 0011, described supervisory control system outputs signal to the host computer of sending out the power transformation unit.
2. transformer unit according to claim 1 is protected loop, it is characterized in that: described the first DC power supply, the second DC power supply and the 3rd DC power supply are respectively three and independently draw the dish from the alternating current-direct current distribution board GA04 of unit.
3. transformer unit according to claim 1 and 2 is protected loop; it is characterized in that: also comprise diode D1 and diode D2; described diode D1 is in parallel with relay K 0011; the negative electrode of described diode D1 is connected with the positive pole of the first DC power supply; the anode of described diode D1 is connected with the negative pole of the first DC power supply; described diode D2 is in parallel with relay K 0001; the negative electrode of described diode D2 is connected with the positive pole of the second DC power supply, and the anode of described diode D2 is connected with the negative pole of the second DC power supply.
4. transformer unit according to claim 3 is protected loop, it is characterized in that: described supervisory control system is XOR monitoring output system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203222743U CN203339666U (en) | 2013-06-06 | 2013-06-06 | Generator-transformer unit protection loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203222743U CN203339666U (en) | 2013-06-06 | 2013-06-06 | Generator-transformer unit protection loop |
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| Publication Number | Publication Date |
|---|---|
| CN203339666U true CN203339666U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203222743U Expired - Fee Related CN203339666U (en) | 2013-06-06 | 2013-06-06 | Generator-transformer unit protection loop |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812501A (en) * | 2020-07-20 | 2020-10-23 | 三门核电有限公司 | Generator-transformer set fault triggering system and method for diesel engine sequential on-load test |
-
2013
- 2013-06-06 CN CN2013203222743U patent/CN203339666U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812501A (en) * | 2020-07-20 | 2020-10-23 | 三门核电有限公司 | Generator-transformer set fault triggering system and method for diesel engine sequential on-load test |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20190606 |