CN104977546A - Secondary direct-current power source loss discriminating method for substations - Google Patents
Secondary direct-current power source loss discriminating method for substations Download PDFInfo
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- CN104977546A CN104977546A CN201510371778.8A CN201510371778A CN104977546A CN 104977546 A CN104977546 A CN 104977546A CN 201510371778 A CN201510371778 A CN 201510371778A CN 104977546 A CN104977546 A CN 104977546A
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- discriminating gear
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Abstract
The invention relates to a secondary direct-current power source loss discriminating method for substations. The method includes the following steps that: signal acquisition devices and discriminating devices are configured for substations in a regional power grid; the signal acquisition devices and the discriminating devices are both powered by communication power sources in communication cells, wherein the communication power sources are independent from secondary direct-current power sources of the substations; the signal acquisition devices acquire secondary direct-current power outage connection points of the substations and channel abnormal connection points of existing line optical fiber longitudinal protection devices, and transmit the secondary direct-current power outage connection points and the channel abnormal connection points to the discriminating devices through a communication network; and after receiving the secondary direct-current power outage connection points of the substations and the channel abnormal connection points of the existing line optical fiber longitudinal protection devices, the discriminating devices discriminate secondary direct-current power source loss through adopting AND Logic. With the method of the invention adopted, judgment on the secondary direct-current power source loss of the substations can be completed quickly and accurately, and decision-making basis can be provided for subsequent corresponding protection and control strategies, and faults can be isolated quickly, and the safe and stable operation of a system can be ensured.
Description
Technical field
The present invention relates to power grid accident method of discrimination, particularly relate to a kind of Secondary Direct Electrical Resources towards transformer station and lose method of discrimination.
Background technology
Electricity substation Secondary Direct Electrical Resources is lost-is comprised protective device direct supply and operation circuit direct supply and loses-be a kind of major accident in substation operation.After Secondary Direct Electrical Resources is lost; all protective devices of this transformer station all cannot work; main transformer in standing, bus and all outlets etc. all lose protection; once break down; our station can correct operation by unprotect, and the back-up protection deferred action far away of other adjacent substations must be waited to carry out isolated fault.Full station Secondary Direct Electrical Resources loss is there is as the transformer station C in Fig. 1 stands; when AC line occurs f1 fault; the route protection of CB2 is because losing protection power source, and action cannot excise fault, fault is excised in the CB5 time delay that CB3, D that CB1, the B that must be stood by adjacent A stand stand.Because back-up protection far away needs to consider intersegmental matching relationship, its actuation time is comparatively slow, in severe case, possibly cannot meet the requirement of system stability its actuation time, bring serious threat to the safe and stable operation of system.If ONLINE RECOGNITION substation secondary direct supply loss can be gone out, corresponding protection and control strategy can be taked to accelerate the responsiveness of adjacent substations protection, fast by fault isolation, improve the stability of system cloud gray model.
Summary of the invention
Object of the present invention; be to provide a kind of Secondary Direct Electrical Resources towards transformer station to lose method of discrimination; when can there is the major accident of substation secondary direct supply loss in it in electrical network; identify the state that substation secondary direct supply is lost quickly and accurately, thus provide decision-making foundation for follow-up corresponding protection and control strategy.
In order to reach above-mentioned purpose, solution of the present invention is:
Secondary Direct Electrical Resources towards transformer station loses a method of discrimination, comprises the steps:
(1) in regional power grid, with transformer station be object configuration signal harvester and discriminating gear;
(2) signal pickup assembly and discriminating gear all adopt the communication power supply of the cell that communicates to power, separate with substation secondary direct supply;
(3) 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;
(4), 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, adopting with logic discrimination is that substation secondary direct supply is lost.
The detailed content of above-mentioned steps (1) is: be object according to transformer station in regional power grid, select a transformer station to configure a set of discriminating gear, completes the differentiation that substation secondary direct supply is lost; Each transformer station respectively configures a set of signal pickup assembly, the collection of settling signal and on give discriminating gear.
The detailed content of above-mentioned steps (2) is: substation secondary direct supply is separate with the communication power supply of the cell that communicates, signal pickup assembly and discriminating gear all adopt the communication power supply of the cell that communicates to power, when substation secondary direct supply is lost, signal pickup assembly and discriminating gear still can normally work.
The detailed content of above-mentioned steps (3) is: when substation secondary direct supply is lost, secondary direct current dead electricity contact is directly received this transformer station signal pickup assembly and on give judgment means; All adjacent substations having transmission line of electricity to be connected with dead electricity transformer station; loss because of offside direct supply is all occurred that optical-fibre channel is interrupted by its existing circuit optical fiber longitudinal UNPROFOR protection unit; the abnormal contact of output channel, these channel abnormal contacts are received respectively 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 receive the channel abnormal signal that all adjacent substations are attached thereto the existing optical fiber pilot protection device of transmission line of electricity; adopt and logic, after delay confirmation, be determined as this substation secondary direct supply lose.
After adopting such scheme; the invention has the beneficial effects as follows: when substation secondary direct supply is lost; this invention can complete the judgement that substation secondary direct supply is lost quickly and accurately; for follow-up corresponding protection and control strategy provide decision-making foundation; fast by fault isolation, the safe and stable operation of safeguards system.
Accompanying drawing explanation
Fig. 1 is the system wiring schematic diagram of 4 transformer stations.
The configuration schematic diagram of signal pickup assembly and discriminating gear when Fig. 2 is the invention process.
When Fig. 3 is the invention process when C stands Secondary Direct Electrical Resources loss, discriminating gear differentiates the logical diagram that C station Secondary Direct Electrical Resources is lost.
Embodiment
The invention provides a kind of Secondary Direct Electrical Resources towards transformer station and lose method of discrimination, in order to understand technology contents of the present invention better, coordinate accompanying drawing to be described as follows especially exemplified by specific embodiment.
Embodiment 1
This kind of Secondary Direct Electrical Resources towards transformer station loses method of discrimination, comprises the steps:
(1) in regional power grid, with transformer station be object configuration signal harvester and discriminating gear;
(2) signal pickup assembly and discriminating gear all adopt the communication power supply of the cell that communicates to power, separate with substation secondary direct supply;
(3) 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;
(4), 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, adopting with logic discrimination is that substation secondary direct supply is lost.
The detailed content of above-mentioned steps (1) is: be object according to transformer station in regional power grid, select a transformer station to configure a set of discriminating gear, completes the differentiation that substation secondary direct supply is lost; Each transformer station respectively configures a set of signal pickup assembly, the collection of settling signal and on give discriminating gear.
The detailed content of above-mentioned steps (2) is: substation secondary direct supply is separate with the communication power supply of the cell that communicates, signal pickup assembly and discriminating gear all adopt the communication power supply of the cell that communicates to power, when substation secondary direct supply is lost, signal pickup assembly and discriminating gear still can normally work.
The detailed content of above-mentioned steps (3) is: when substation secondary direct supply is lost, secondary direct current dead electricity contact is directly received this transformer station signal pickup assembly and on give judgment means; All adjacent substations having transmission line of electricity to be connected with dead electricity transformer station; loss because of offside direct supply is all occurred that optical-fibre channel is interrupted by its existing circuit optical fiber longitudinal UNPROFOR protection unit; the abnormal contact of output channel, these channel abnormal contacts are received respectively 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 receive the channel abnormal signal that all adjacent substations are attached thereto the existing optical fiber pilot protection device of transmission line of electricity; adopt and logic, after delay confirmation, be determined as this substation secondary direct supply lose.
First, to regional power grid shown in Fig. 1, take transformer station as object configuration signal harvester and discriminating gear: select A transformer station to configure a set of discriminating gear, complete the differentiation that substation secondary direct supply is lost; A, B, C, D tetra-transformer stations respectively configure a set of signal pickup assembly, the collection of settling signal and on give discriminating gear, concrete configuration signal is as Fig. 2.
Substation secondary direct supply is separate with the communication power supply of the cell that communicates, the discriminating gear that signal pickup assembly and the A of A, B, C, D tetra-transformer stations stand all adopts the communication power supply of the cell that communicates to power, when substation secondary direct supply is lost, signal pickup assembly and discriminating gear still can normally work.Lose and carry out detailed method of discrimination for the Secondary Direct Electrical Resources of standing of C in Fig. 1 and illustrate: when C stand Secondary Direct Electrical Resources lose time, secondary direct current dead electricity contact is directly received C stand signal pickup assembly and on give the A discriminating gear at station.Meanwhile; with C stand CB1, CB3, CB5 existing line optical fiber pilot protection device that A stands, B stands, D stands corresponding of being connected by transmission line of electricity will because optical-fibre channel is interrupted the abnormal contact of output channel, these channel abnormal contacts to be received respectively in corresponding A, B, D signal pickup assembly and on give the A discriminating gear at station.Discriminating gear receives the secondary direct current dead electricity contact sent at C station; receive A station simultaneously, B stands, D stands CB1, CB3, CB5 existing line optical fiber pilot protection device channel abnormal signal sent respectively; after delay confirmation, be determined as C station substation secondary direct supply lose, concrete differentiation logic as shown in Figure 3.
To sum up; the present invention is by the enforcement of such scheme; when can there is the major accident that substation secondary direct supply loses in electrical network, identify the state that substation secondary direct supply is lost quickly and accurately, thus provide decision-making foundation for follow-up corresponding protection and control strategy.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (5)
1. the Secondary Direct Electrical Resources towards transformer station loses a method of discrimination, it is characterized in that comprising the steps:
(1) in regional power grid, with transformer station be object configuration signal harvester and discriminating gear;
(2) signal pickup assembly and discriminating gear all adopt the communication power supply of the cell that communicates to power, separate with substation secondary direct supply;
(3) 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;
(4), 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, adopting with logic discrimination is that substation secondary direct supply is lost.
2. a kind of Secondary Direct Electrical Resources towards transformer station loses method of discrimination as claimed in claim 1, it is characterized in that the detailed content of described step (1) is: be object according to transformer station in regional power grid, select a transformer station to configure a set of discriminating gear, complete the differentiation that substation secondary direct supply is lost; Each transformer station respectively configures a set of signal pickup assembly, the collection of settling signal and on give discriminating gear.
3. a kind of Secondary Direct Electrical Resources towards transformer station loses method of discrimination as claimed in claim 1, it is characterized in that the detailed content of described step (2) is: substation secondary direct supply is separate with the communication power supply of the cell that communicates, signal pickup assembly and discriminating gear all adopt the communication power supply of the cell that communicates to power, when substation secondary direct supply is lost, signal pickup assembly and discriminating gear still can normally work.
4. a kind of Secondary Direct Electrical Resources towards transformer station loses method of discrimination as claimed in claim 1, it is characterized in that the detailed content of described step (3) is: when substation secondary direct supply is lost, secondary direct current dead electricity contact is directly received this transformer station signal pickup assembly and on give judgment means; All adjacent substations having transmission line of electricity to be connected with dead electricity transformer station; loss because of offside direct supply is all occurred that optical-fibre channel is interrupted by its existing circuit optical fiber longitudinal UNPROFOR protection unit; the abnormal contact of output channel, these channel abnormal contacts are received respectively respective signal pickup assembly and on give judgment means.
5. a kind of Secondary Direct Electrical Resources towards transformer station loses method of discrimination as claimed in claim 1; it is characterized in that the detailed content of described step (4) is: discriminating gear receives the secondary direct current dead electricity contact of certain transformer station; and receive the channel abnormal signal that all adjacent substations are attached thereto the existing optical fiber pilot protection device of transmission line of electricity; adopt and logic, after delay confirmation, be determined as this substation secondary direct supply lose.
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Cited By (2)
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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 |
| CN114400623A (en) * | 2022-01-21 | 2022-04-26 | 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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| CN114400623A (en) * | 2022-01-21 | 2022-04-26 | 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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| CN104977546B (en) | 2018-01-16 |
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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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