CN202330616U - Detecting structure for load on transformer substation for large station - Google Patents
Detecting structure for load on transformer substation for large station Download PDFInfo
- Publication number
- CN202330616U CN202330616U CN2011202904924U CN201120290492U CN202330616U CN 202330616 U CN202330616 U CN 202330616U CN 2011202904924 U CN2011202904924 U CN 2011202904924U CN 201120290492 U CN201120290492 U CN 201120290492U CN 202330616 U CN202330616 U CN 202330616U
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- load
- station
- transformer
- low
- detecting structure
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Abstract
The utility model discloses a detecting structure for load on a transformer substation for a large station. The detecting structure comprises a main transformer (1) for the transformer substation for the station and a reactive compensation power distribution field (2), wherein an electric cable (3) is connected on a device for a low-voltage side over-current mutual inductor of the main transformer (1); and the other end of the electric cable (3) is connected with the reactive compensation power distribution field (2),. The detecting structure can achieve the detection for differential protection load for the transformer substation for the station with large capacity and high ratio of transformation. An effective solution is provided for the transformation substation which cannot organize the load for the station after the transformation substations for the substation are put into operation, so that the differential protection for the transformation can be ensured timely to prevent unnecessary incorrect protection.
Description
Technical field
The utility model relates to the detection architecture of a kind of large-scale station with transformer station's on-load, belongs to the relay protection of power system technical field.
Background technology
At some large-scale substations, like the high capacity converting plant that AC side adopts 500kV, its station directly is depressured to 10kV with becoming from 500kV, uses bus through the 10kV station of cable access transformer station then.Because of such transformer of transformer both sides is too big owing to no-load voltage ratio, the very big electric current of low-pressure side, it is then very little to convert on high-tension side electric current, and on high-tension side current transformer is the huge short-circuit current of adaptation 500kV side, it is too little that its no-load voltage ratio can not be got.Because of above-mentioned reason, when the polarity of transformer station was checked, low-pressure side needed on-load to check; But concerning change is used at the station of operation; Then can't organize the station with load, cause to carry out the on-load polarity check of transformer differential protection, influence the correctness and the reliability of protection.
The utility model content
The technical matters that the utility model will solve provide a kind of cost low, utilize reactive-load compensation that perception or capacitive load are provided, guarantee the detection architecture of the large-scale station of the normal operation of transformer differential protection with transformer station's on-load, can overcome the deficiency of prior art.
The technical scheme of the utility model is: it comprises the station with the main-transformer and the reactive-load compensation distribution field that become, on the equipment of the low-pressure side excess current mutual inductor of main-transformer, is connected with cable, and the other end of cable is connected with reactive-load compensation distribution field.
The equipment of low-pressure side excess current mutual inductor is the low-pressure side service entrance switch.
The other end of cable is connected on the electric capacity or inductance of reactive-load compensation distribution field.
This programme be with a high-tension cable, slave station with the low-pressure side service entrance switch that becomes after (purpose is to let electric current pass through main transformer low-pressure side current transformer) the reactive-load compensation distribution field of receiving transformer station.Capacity (current transformer that will guarantee transformer high and low pressure side can both have enough output currents, to realize the purpose of on-load check) according to the load test needs calculates to add how many reactive-load compensation electric capacity or inductance.Temporarily cable is inserted corresponding reactive-load compensation loop.Closing the station with becoming switch and checking with going up the on-load that just can carry out transformer differential protection etc. after the corresponding load or burden without work.
Compare with prior art, the utility model can be realized high capacity, and the station of hypermutation ratio is with the check of transformer differential boundary belt load.Can't to organize the station after putting into operation again be an effective solution with the transformer station of load with becoming for those stations, can guarantee to drop into transformer differential protection in time, prevents the unnecessary protection malfunction.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Embodiment: as shown in Figure 1, it comprises the station with main-transformer that becomes 1 and reactive-load compensation distribution field 2, on the equipment of the low-pressure side excess current mutual inductor of main-transformer 1, is connected with cable 3, and the other end of cable 3 is connected with reactive-load compensation distribution field 2.
Concrete grammar is with a high-tension cable 3, the reactive-load compensation distribution field 2 that (purpose is to let electric current pass through main transformer low-pressure side current transformer) received transformer station behind the low-pressure side service entrance switch that slave station usefulness becomes.Capacity (current transformer that will guarantee transformer high and low pressure side can both have enough output currents, to realize the purpose of on-load check) according to the load test needs calculates to add how many reactive-load compensation electric capacity or inductance.Temporarily cable 3 is inserted corresponding reactive-load compensation loop.Closing the station with becoming switch and checking with going up the on-load that just can carry out transformer differential protection etc. after the corresponding load or burden without work.
Claims (3)
1. a large-scale station is with the detection architecture of transformer station's on-load; It comprises that the station is with the main-transformer (1) and the reactive-load compensation distribution field (2) that become; It is characterized in that: on the equipment of the low-pressure side excess current mutual inductor of main-transformer (1), be connected with cable (3), the other end of cable (3) is connected with reactive-load compensation distribution field (2).
2. large-scale station according to claim 1 is characterized in that with the detection architecture of transformer station's on-load: the equipment of low-pressure side excess current mutual inductor is the low-pressure side service entrance switch.
3. large-scale station according to claim 1 is characterized in that with the detection architecture of transformer station's on-load: the other end of cable (3) is connected on the electric capacity or inductance of reactive-load compensation distribution field (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202904924U CN202330616U (en) | 2011-08-11 | 2011-08-11 | Detecting structure for load on transformer substation for large station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202904924U CN202330616U (en) | 2011-08-11 | 2011-08-11 | Detecting structure for load on transformer substation for large station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330616U true CN202330616U (en) | 2012-07-11 |
Family
ID=46442592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202904924U Expired - Fee Related CN202330616U (en) | 2011-08-11 | 2011-08-11 | Detecting structure for load on transformer substation for large station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330616U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076315A (en) * | 2014-07-14 | 2014-10-01 | 国网河南省电力公司商丘供电公司 | On-load calibration method for polarity of high-transformation-ratio current transformer (CT) |
-
2011
- 2011-08-11 CN CN2011202904924U patent/CN202330616U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076315A (en) * | 2014-07-14 | 2014-10-01 | 国网河南省电力公司商丘供电公司 | On-load calibration method for polarity of high-transformation-ratio current transformer (CT) |
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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: 20120711 Termination date: 20150811 |
|
| EXPY | Termination of patent right or utility model |