CN104977546B - A kind of Secondary Direct Electrical Resources towards transformer station lose method of discrimination - Google Patents
A kind of Secondary Direct Electrical Resources towards transformer station lose method of discrimination Download PDFInfo
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- CN104977546B CN104977546B CN201510371778.8A CN201510371778A CN104977546B CN 104977546 B CN104977546 B CN 104977546B CN 201510371778 A CN201510371778 A CN 201510371778A CN 104977546 B CN104977546 B CN 104977546B
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- transformer station
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- discriminating gear
- discrimination
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Abstract
The present invention discloses a kind of Secondary Direct Electrical Resources towards transformer station and loses method of discrimination, and this method includes herein below：In regional power grid signal pickup assembly and discriminating gear are configured by object of transformer station；Signal pickup assembly is powered with discriminating gear using the communication power supply for the cell that communicates, separate with substation secondary dc source；Signal pickup assembly collects the secondary direct current dead electricity contact of each transformer station and the channel abnormal contact of existing circuit optical fiber longitudinal UNPROFOR protection unit, and gives discriminating gear by communication network；After discriminating gear receives the secondary direct current dead electricity contact of transformer station and the channel abnormal contact of existing circuit optical fiber longitudinal UNPROFOR protection unit, use and lost with logic discrimination for substation secondary dc source.The present invention can be completed rapidly and accurately the judgement of substation secondary dc source loss, decision-making foundation be provided for follow-up corresponding protection and control strategy, quickly by Fault Isolation, the safe and stable operation of safeguards system.
Description
Technical field
The present invention relates to power grid accident method of discrimination, more particularly to a kind of Secondary Direct Electrical Resources towards transformer station to lose and sentence
Other method.
Background technology
Protection device dc source is lost-included to electricity substation Secondary Direct Electrical Resources and operation circuit dc source is lost
Lose-it is a kind of major accident in substation operation.After Secondary Direct Electrical Resources are lost, all protection devices of this transformer station are equal
Can not work, stand in main transformer, bus and all outlets etc. lose protection, once breaking down, our station can by unprotect
Correctly to act, it is necessary to wait the remote back-up protection deferred action of other adjacent substations to carry out isolated fault.Such as the transformer station in Fig. 1
C stations occur whole station Secondary Direct Electrical Resources and lost, when f1 failures occur on AC lines, CB2 route protection because losing protection power source,
Excision failure can not be acted, it is necessary to the CB5 delay excision failures that CB3, D that CB1, the B to be stood by adjacent A stands stand.After remote
Standby protection needs to consider intersegmental matching relationship, and its actuation time is slower, and in severe case, its actuation time possibly can not meet
The stable requirement of system, serious threat is brought to the safe and stable operation of system.If energy ONLINE RECOGNITION goes out substation secondary direct current
Loss of power, corresponding protection and control strategy can be taken to accelerate the responsiveness of adjacent substations protection, quickly by failure
Isolation, improve the stability of system operation.
The content of the invention
The purpose of the present invention, it is to provide a kind of Secondary Direct Electrical Resources towards transformer station and loses method of discrimination, it can be
When the major accident that substation secondary dc source is lost occurring in power network, substation secondary direct current is fast and accurately identified
The state of loss of power, so as to provide decision-making foundation for follow-up corresponding protection and control strategy.
In order to reach above-mentioned purpose, solution of the invention is：
A kind of Secondary Direct Electrical Resources towards transformer station lose method of discrimination, comprise the following steps：
(1) signal pickup assembly and discriminating gear are configured by object of transformer station in regional power grid；
(2) signal pickup assembly is powered with discriminating gear using the communication power supply for the cell that communicates, straight with substation secondary
It is separate to flow power supply；
(3) signal pickup assembly collects the secondary direct current dead electricity contact of each transformer station and existing circuit optical fiber longitudinal UNPROFOR
The channel abnormal contact of protection unit, and give discriminating gear by communication network；
(4) discriminating gear receives the secondary direct current dead electricity contact of transformer station and existing circuit optical fiber longitudinal UNPROFOR protection unit
Channel abnormal contact after, use with logic discrimination for substation secondary dc source lose.
The detailed content of above-mentioned steps (1) is：According to transformer station it is object in regional power grid, selects a transformer station to match somebody with somebody
A set of discriminating gear is put, completes the differentiation that substation secondary dc source is lost；Each transformer station respectively configures a set of signal acquisition
Device, complete signal collection and on give discriminating gear.
The detailed content of above-mentioned steps (2) is：The communication power supply of substation secondary dc source and communication cell is mutually only
Vertical, signal pickup assembly is powered with discriminating gear using the communication power supply for the cell that communicates, when substation secondary dc source is lost
During mistake, signal pickup assembly remains to normal work with discriminating gear.
The detailed content of above-mentioned steps (3) is：When substation secondary dc source is lost, by secondary direct current dead electricity contact
Be directly connected to the signal pickup assembly of the transformer station and on give judgment means；It is all to there is transmission line of electricity to be connected with dead electricity transformer station
Adjacent substations, its existing circuit optical fiber longitudinal UNPROFOR protection unit optical fiber will occurs because of the loss of offside dc source and leads to
Road interrupt, output channel exception contact, by these channel abnormal contacts be coupled with respective signal pickup assembly and on give
Judgment means.
The detailed content of above-mentioned steps (4) is：Discriminating gear receives the secondary direct current dead electricity contact of certain transformer station, and receives
All adjacent substations are attached thereto the channel abnormal signal of the existing optical fiber pilot protection device of transmission line of electricity, using with patrolling
Volume, substation secondary dc source loss is determined as after delay confirmation.
After such scheme, the beneficial effects of the invention are as follows：When substation secondary dc source is lost, the invention energy
The judgement of substation secondary dc source loss is enough completed rapidly and accurately, is provided for follow-up corresponding protection and control strategy
Decision-making foundation, quickly by Fault Isolation, the safe and stable operation of safeguards system.
Brief description of the drawings
Fig. 1 is the system wiring schematic diagram of 4 transformer stations.
Fig. 2 is the configuration schematic diagram of signal pickup assembly and discriminating gear when the present invention is implemented.
When Fig. 3 is that at C stations, Secondary Direct Electrical Resources are lost when the present invention is implemented, discriminating gear differentiates C stations Secondary Direct Electrical Resources
The logic chart of loss.
Embodiment
The present invention provides a kind of Secondary Direct Electrical Resources towards transformer station and loses method of discrimination, in order to be best understood from this hair
Bright technology contents, especially exemplified by specific embodiment and coordinate brief description of the drawings as follows.
Embodiment 1
A kind of this Secondary Direct Electrical Resources towards transformer station loses method of discrimination, comprises the following steps：
(1) signal pickup assembly and discriminating gear are configured by object of transformer station in regional power grid；
(2) signal pickup assembly is powered with discriminating gear using the communication power supply for the cell that communicates, straight with substation secondary
It is separate to flow power supply；
(3) signal pickup assembly collects the secondary direct current dead electricity contact of each transformer station and existing circuit optical fiber longitudinal UNPROFOR
The channel abnormal contact of protection unit, and give discriminating gear by communication network；
(4) discriminating gear receives the secondary direct current dead electricity contact of transformer station and existing circuit optical fiber longitudinal UNPROFOR protection unit
Channel abnormal contact after, use with logic discrimination for substation secondary dc source lose.
The detailed content of above-mentioned steps (1) is：According to transformer station it is object in regional power grid, selects a transformer station to match somebody with somebody
A set of discriminating gear is put, completes the differentiation that substation secondary dc source is lost；Each transformer station respectively configures a set of signal acquisition
Device, complete signal collection and on give discriminating gear.
The detailed content of above-mentioned steps (2) is：The communication power supply of substation secondary dc source and communication cell is mutually only
Vertical, signal pickup assembly is powered with discriminating gear using the communication power supply for the cell that communicates, when substation secondary dc source is lost
During mistake, signal pickup assembly remains to normal work with discriminating gear.
The detailed content of above-mentioned steps (3) is：When substation secondary dc source is lost, by secondary direct current dead electricity contact
Be directly connected to the signal pickup assembly of the transformer station and on give judgment means；It is all to there is transmission line of electricity to be connected with dead electricity transformer station
Adjacent substations, its existing circuit optical fiber longitudinal UNPROFOR protection unit optical fiber will occurs because of the loss of offside dc source and leads to
Road interrupt, output channel exception contact, by these channel abnormal contacts be coupled with respective signal pickup assembly and on give
Judgment means.
The detailed content of above-mentioned steps (4) is：Discriminating gear receives the secondary direct current dead electricity contact of certain transformer station, and receives
All adjacent substations are attached thereto the channel abnormal signal of the existing optical fiber pilot protection device of transmission line of electricity, using with patrolling
Volume, substation secondary dc source loss is determined as after delay confirmation.
First, to regional power grid shown in Fig. 1, signal pickup assembly and discriminating gear are configured by object of transformer station：Choosing
Select A transformer stations and configure a set of discriminating gear, complete the differentiation that substation secondary dc source is lost；A, tetra- transformer stations of B, C, D
Respectively configure a set of signal pickup assembly, complete signal collection and on give discriminating gear, concrete configuration signal such as Fig. 2.
The communication power supply of substation secondary dc source and communication cell is separate, the letter of tetra- transformer stations of A, B, C, D
The discriminating gear that number harvester and A stand is using the communication power supply power supply for the cell that communicate, when substation secondary dc source is lost
During mistake, signal pickup assembly remains to normal work with discriminating gear.Stood exemplified by Secondary Direct Electrical Resources are lost and carried out in detail by C in Fig. 1
Thin method of discrimination explanation：When Secondary Direct Electrical Resources are lost when C stations, secondary direct current dead electricity contact is directly connected to C stations signal and adopted
Acquisition means and on give A station discriminating gear.At the same time, it is corresponding with the A stations, B stations, D stations that C stations are connected by transmission line of electricity
CB1, CB3, CB5 existing line optical fiber pilot protection device will because optical-fibre channel is interrupted and output channel exception contact, by these
Channel abnormal contact be coupled with corresponding A, B, D signal pickup assembly and on give the A discriminating gears at station.Discriminating gear is received
The secondary direct current dead electricity contact sent to C stations, while receive A stations, CB1, CB3, CB5 existing line that B is stood, D stations are sent respectively
Optical fiber pilot protection device channel abnormal signal, C stations substation secondary dc source is determined as after delay confirmation and is lost, specifically
Differentiate that logic is as shown in Figure 3.
To sum up, by the implementation of such scheme substation secondary dc source loss can occur in power network for the present invention
During major accident, the state of substation secondary dc source loss is fast and accurately identified, so as to be follow-up corresponding protection
Decision-making foundation is provided with control strategy.
The technological thought of above example only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within
Within.
Claims (5)
1. a kind of Secondary Direct Electrical Resources towards transformer station lose method of discrimination, it is characterised in that comprise the following steps：
(1) signal pickup assembly and discriminating gear are configured by object of transformer station in regional power grid；
(2) signal pickup assembly is powered with discriminating gear using the communication power supply for the cell that communicates, with substation secondary direct current
Source is separate；
(3) signal pickup assembly collects the secondary direct current dead electricity contact and existing circuit optical fiber pilot protection dress of each transformer station
The channel abnormal contact put, and give discriminating gear by communication network；
(4) discriminating gear receives the secondary direct current dead electricity contact of transformer station and leading to for existing circuit optical fiber longitudinal UNPROFOR protection unit
After road exception contact, use and lost with logic discrimination for substation secondary dc source.
2. a kind of Secondary Direct Electrical Resources towards transformer station as claimed in claim 1 lose method of discrimination, it is characterised in that institute
Stating the detailed content of step (1) is：According to transformer station it is object in regional power grid, selects a transformer station to configure a set of differentiation
Device, complete the differentiation that substation secondary dc source is lost；Each transformer station respectively configures a set of signal pickup assembly, completes letter
Number collection and on give discriminating gear.
3. a kind of Secondary Direct Electrical Resources towards transformer station as claimed in claim 1 lose method of discrimination, it is characterised in that institute
Stating the detailed content of step (2) is：The communication power supply of substation secondary dc source and communication cell is separate, signal acquisition
Device is powered with discriminating gear using the communication power supply for the cell that communicates, and when substation secondary dc source is lost, signal is adopted
Acquisition means remain to normal work with discriminating gear.
4. a kind of Secondary Direct Electrical Resources towards transformer station as claimed in claim 1 lose method of discrimination, it is characterised in that institute
Stating the detailed content of step (3) is：When substation secondary dc source is lost, secondary direct current dead electricity contact is directly connected to this
The signal pickup assembly of transformer station and on give judgment means；All adjacent power transformations for thering is transmission line of electricity to be connected with dead electricity transformer station
Stand, its existing circuit optical fiber longitudinal UNPROFOR protection unit optical-fibre channel interruption will occur because of the loss of offside dc source, defeated
Go out channel abnormal contact, by these channel abnormal contacts be coupled with respective signal pickup assembly and on give judgment means.
5. a kind of Secondary Direct Electrical Resources towards transformer station as claimed in claim 1 lose method of discrimination, it is characterised in that institute
Stating the detailed content of step (4) is：Discriminating gear receives the secondary direct current dead electricity contact of certain transformer station, and receives all adjacent changes
Power station is attached thereto the channel abnormal signal of the existing optical fiber pilot protection device of transmission line of electricity, use and logic, true through being delayed
Substation secondary dc source loss is determined as after recognizing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510371778.8A CN104977546B (en) | 2015-06-29 | 2015-06-29 | A kind of Secondary Direct Electrical Resources towards transformer station lose method of discrimination |
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| CN201510371778.8A CN104977546B (en) | 2015-06-29 | 2015-06-29 | A kind of Secondary Direct Electrical Resources towards transformer station lose method of discrimination |
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| CN104977546B true CN104977546B (en) | 2018-01-16 |
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| CN108226810A (en) * | 2016-12-22 | 2018-06-29 | 陕西金电电子科技有限责任公司 | A kind of anti-decompression monitoring device of DC power supply and monitoring method |
| CN114400623B (en) * | 2022-01-21 | 2023-03-21 | 南京国电南自电网自动化有限公司 | Low-voltage side fault removal protection system and method under direct current power loss of transformer substation |
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| CN103151842B (en) * | 2013-03-18 | 2015-03-25 | 国家电网公司 | Hierarchical protection control system facing regional power grid |
| CN104078946B (en) * | 2013-10-30 | 2015-08-05 | 中国南方电网有限责任公司 | A kind of wide area distance protecting method towards transformer station |
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| CN201215898Y (en) * | 2008-06-27 | 2009-04-01 | 南京南瑞继保电气有限公司 | Backup auto-activating device having remote auto-activating function |
| CN101673965A (en) * | 2009-10-14 | 2010-03-17 | 华南理工大学 | Automatic switching control method for wide-area emergency power source of electric power system |
| CN102306928A (en) * | 2011-09-19 | 2012-01-04 | 中国矿业大学 | Mining fiber longitudinal override trip protection device and method thereof |
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Effective date of registration: 20170706 Address after: 529000 Jiangmen City, Guangdong Province Building No. two road, No. 152 Applicant after: JIANGMEN POWER SUPPLY BUREAU, GUANGDONG POWER GRID CO., LTD. Address before: 529000 Jiangmen City, Guangdong Province Building No. two road, No. 152 Applicant before: JIANGMEN POWER SUPPLY BUREAU, GUANGDONG POWER GRID CO., LTD. Applicant before: Nanjing Nari-Relays Engineering Technology Co., Ltd. |
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