CN104079066A - Method for judging disappearance of secondary direct-current power supply of far-end transformer substation - Google Patents
Method for judging disappearance of secondary direct-current power supply of far-end transformer substation Download PDFInfo
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- CN104079066A CN104079066A CN201310526765.4A CN201310526765A CN104079066A CN 104079066 A CN104079066 A CN 104079066A CN 201310526765 A CN201310526765 A CN 201310526765A CN 104079066 A CN104079066 A CN 104079066A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008034 disappearance Effects 0.000 title abstract description 5
- 238000004891 communication Methods 0.000 claims abstract description 26
- DWSYCUKCNSVBRA-UHFFFAOYSA-N 4-(5-methylsulfonyltetrazol-1-yl)phenol Chemical compound CS(=O)(=O)C1=NN=NN1C1=CC=C(C=C1)O DWSYCUKCNSVBRA-UHFFFAOYSA-N 0.000 claims abstract description 4
- 101710167643 Serine/threonine protein phosphatase PstP Proteins 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 40
- 230000001681 protective effect Effects 0.000 claims description 15
- 230000001131 transforming effect Effects 0.000 claims description 7
- 238000011217 control strategy Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a method for judging disappearance of a secondary direct-current power supply of a far-end transformer substation. A power loss alarm contact of the secondary direct-current power supply of the transformer substation is introduced into I/O on-off input of a communication cell measuring and controlling device. The communication bandwidth of MSTP equipment is divided into the protection bandwidth and measuring and controlling bandwidth which are independent from each other, the protection bandwidth is used for conveying protection information, and the measuring and controlling bandwidth is used for conveying access power loss on-off input information of measuring and controlling equipment. A receiving end transformer substation protection device can detect received offside information in real time. The judgment whether a secondary direct-current power supply of an offside transformer substation disappears can be given out in real time by comparing information of the protection bandwidth with information of the measuring and controlling bandwidth. According to the method, a measuring and controlling loop of an independent power supply and a communication loop of independent bandwidth can be utilized to transmit disappearance information of the secondary direct-current power supply. Disappearance of the secondary direct-current power supply of the far-end transformer substation can be accurately recognized in an online mode by comparing the protection bandwidth with the measuring and controlling bandwidth. Thus, decision basis can be provided for following protection strategies or control strategies.
Description
Technical field
The present invention relates to judge in a kind of electric power system the method for far-end substation secondary DC supply interruption.
Background technology
Electricity substation Secondary Direct Electrical Resources disappears, and (protective device direct current disappears; or operating power direct current disappears) be a kind of serious accident in substation operation; after Secondary Direct Electrical Resources disappears; all protective devices or the operation circuit of this transformer station all cannot be worked; main transformer in standing, female poor, high resistance, and circuit outlet etc. all loses protection, once break down; our station moves unprotect, must wait the backup protection deferred action far away of other phase neighboring stations to carry out isolated fault.As full station, the C station in Fig. 1 dead electricity, while there is f1 fault on AC line, the route protection of CB2 is because of losing protection power source or operation circuit power supply, cannot move excision fault, must excise fault by the CB5 time delay at CB3, the D station at CB1, the B station at adjacent A station.Because backup protection far away need to be considered intersegmental matching relationship, its operate time is slower, and in severe case, possibly cannot meet the requirement of system stability its operate time, and the safe and stable operation of system is brought to serious threat.If can ONLINE RECOGNITION go out substation secondary DC supply interruption; maybe can take corresponding strategy to accelerate the responsiveness of adjacent substations protection; fast by failure removal, but so far, still do not have the method for ONLINE RECOGNITION substation secondary DC supply interruption to propose.
Summary of the invention
Object of the present invention; be to provide a kind of method that judges far-end substation secondary DC supply interruption; it can be by means of the observing and controlling loop of independent current source; and the communication loop of independent bandwidth transmits the information that Secondary Direct Electrical Resources disappears; and by relatively protecting bandwidth and observing and controlling bandwidth; the online substation secondary DC supply interruption that accurately identifies far-end, thus decision-making foundation provided for follow-up protection strategy or control strategy.
In order to reach above-mentioned purpose, solution of the present invention is:
A method that judges far-end substation secondary DC supply interruption, comprises the steps:
(1) I/O that the substation secondary DC power supply dead electricity alarm contact that comprises protective device direct current and operation circuit direct current is incorporated into the cell measure and control device of communicating by letter open into, respectively called after protection dead electricity open into and operation dead electricity open into, the communication bandwidth of MSTP equipment is divided into and independently protects bandwidth and observing and controlling bandwidth, protection bandwidth transmits protection information, observing and controlling bandwidth transmits the dead electricity of measuring and controlling equipment access and opens into information, and this dead electricity is opened into information and comprised that protecting dead electricity to open into information and operation dead electricity opens into information;
(2) receiving terminal transforming plant protecting device detects in real time the offside information receiving, and by relatively protecting the information of bandwidth and observing and controlling bandwidth, provides in real time the judgement whether Secondary Direct Electrical Resources of offside transformer station disappears.
In above-mentioned steps (2), concrete basis for estimation is as follows:
A) observing and controlling band data receives normal and receives offside protection dead electricity information, protects bandwidth data receiver to interrupt simultaneously, is judged as offside secondary direct current protecting power supply and disappears;
B) observing and controlling band data receives normal and receives offside operation dead electricity information, protects bandwidth data receiver normal simultaneously, is judged as offside secondary direct current operative power source and disappears;
C) observing and controlling bandwidth and protection bandwidth data receiver all interrupt, and are judged as communication loop fault;
D) observing and controlling band data receives normally and does not receive any dead electricity information of offside, and protection bandwidth data receiver interrupts, and is judged as offside protective device fault or protective device communication interface fault;
E) observing and controlling band data receive interruption, protection bandwidth data receiver is normal, is judged as offside measure and control device fault or measure and control device communication interface fault.
Above-mentioned judgement far-end substation secondary DC supply interruption adopts the mode of single judgement or comprehensive judgement, single judgement refers to that arbitrary transformer station judges the second adjacent with it substation secondary DC supply interruption, thinks described the second substation secondary DC supply interruption; Described comprehensive judgement refers to that all transformer stations adjacent with described the second transformer station all judge this second substation secondary DC supply interruption, thinks this second substation secondary DC supply interruption.
Adopt after such scheme; the invention has the beneficial effects as follows: when transforming plant protecting Secondary Direct Electrical Resources disappears; observing and controlling and communication loop by means of independent current source are sent to far-end transformer station by dead electricity information; realized the far-end judgement that transforming plant protecting Secondary Direct Electrical Resources disappears; for the new protection and measurement and control strategy of the follow-up research and development of far-end transformer station, thereby realize quick isolated fault, provide condition.
Accompanying drawing explanation
Fig. 1 is the system wiring schematic diagram of 4 transformer stations, and protection DC supply interruption in the C of take station is example;
Fig. 2 realizes protective device of the present invention, measure and control device, communication loop connection diagram;
Fig. 3 is that the present invention judges C station protection DC supply interruption, adopts the logical schematic of the comprehensive judgement of a plurality of transformer stations.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention and beneficial effect are elaborated.
The invention provides a kind of method that judges far-end substation secondary DC supply interruption, according to the claimed Secondary Direct Electrical Resources of substation secondary design specification and communication power supply loop, need the principle of independent design known, when the dead electricity of protection Secondary Direct Electrical Resources loop, communication power supply loop is still normal, therefore the present invention considers protection Secondary Direct Electrical Resources dead electricity signal to be sent to offside transformer station by measure and control device and communicator, the content of described determination methods is: the I/O that substation secondary DC power supply (comprising protective device direct current and operation circuit direct current) dead electricity alarm contact is incorporated into the cell measure and control device of communicating by letter open into (respectively called after protection dead electricity open into and operation dead electricity open into), the communication bandwidth of MSTP equipment is divided into and independently protects bandwidth and observing and controlling bandwidth, protection bandwidth transmits protection information, the dead electricity that observing and controlling bandwidth transmits measuring and controlling equipment access is opened into information (comprise aforementioned protection dead electricity open into information and operation dead electricity open into information), transforming plant protecting device detects the offside information receiving in real time, by relatively protecting the information of bandwidth and observing and controlling bandwidth, accurately distinguishing is offside substation secondary DC supply interruption, or the fault of protective device own, or communication loop fault, provide in real time the judgement whether Secondary Direct Electrical Resources of offside transformer station disappears.
The system of 4 transformer stations shown in Fig. 1 of take describes as example, and total A, B, D San Ge transformer station are connected with C station.Take the wiring explanation in example is carried out transformer station of the A station of Fig. 2, the wiring of other transformer stations and logic judgement are all identical.
As shown in the A station of Fig. 2; the present invention is when implementing; the I/O that the DC supply interruption alarm contact (dead electricity alarm contact) of protection flow directing device is linked into communication cell measure and control device open into, measure and control device is delivered to offside D by dead electricity information through optical fiber transmission by communication bandwidth and is stood.Protective device is also sent to offside D by protection information through optical fiber by protection bandwidth and stands.Protective device receives protection information and the dead electricity information that offside C station is come simultaneously, by generalized analysis, provides in real time the judgement whether Secondary Direct Electrical Resources at offside C station disappears.Basis for estimation is as follows:
A) observing and controlling band data receives normal and receives offside protection dead electricity information, protects bandwidth data receiver to interrupt simultaneously, is judged as offside secondary direct current protecting power supply and disappears;
B) observing and controlling band data receives normal and receives offside operation dead electricity information, protects bandwidth data receiver normal simultaneously, is judged as offside secondary direct current operative power source and disappears;
C) observing and controlling bandwidth and protection bandwidth data receiver all interrupt, and are judged as communication loop fault;
D) observing and controlling band data receives normally and does not receive any dead electricity information of offside, and protection bandwidth data receiver interrupts, and is judged as offside protective device fault or protective device communication interface fault;
E) observing and controlling band data receive interruption, protection bandwidth data receiver is normal, is judged as offside measure and control device fault or measure and control device communication interface fault.
For the system shown in Fig. 1, suppose that C station Secondary Direct Electrical Resources occurs and disappears, adopt after said method, all can independent judgment go out C station Secondary Direct Electrical Resources and disappear with stand adjacent A, B, D station of C.In order to strengthen the reliability of judgement, reduce erroneous judgement probability, also can adopt the comprehensive judgment mode of a plurality of transformer stations shown in Fig. 3, just disappear and think the Secondary Direct Electrical Resources disappearance of C station with the C C station Secondary Direct Electrical Resources of standing A station, B station, D station adjacent and all judge.
To sum up, the present invention is by the enforcement of such scheme, due to substation secondary DC power supply and observing and controlling power supply, communication power supply loop is independent, when the dead electricity of Secondary Direct Electrical Resources loop, observing and controlling power supply, communication power supply loop is still normal, Secondary Direct Electrical Resources dead electricity signal can be sent to offside transformer station by measure and control device and communicator, when transforming plant protecting Secondary Direct Electrical Resources disappears, observing and controlling and communication loop by means of independent current source are sent to far-end transformer station by dead electricity information, realized the far-end judgement that transforming plant protecting Secondary Direct Electrical Resources disappears, for the new protection and measurement and control strategy of the follow-up research and development of far-end transformer station, thereby realize quick isolated fault condition is provided.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection range of the present invention.
Claims (3)
1. judge a method for far-end substation secondary DC supply interruption, it is characterized in that comprising the steps:
(1) I/O that the substation secondary DC power supply dead electricity alarm contact that comprises protective device direct current and operation circuit direct current is incorporated into the cell measure and control device of communicating by letter open into, respectively called after protection dead electricity open into and operation dead electricity open into, the communication bandwidth of MSTP equipment is divided into and independently protects bandwidth and observing and controlling bandwidth, protection bandwidth transmits protection information, observing and controlling bandwidth transmits the dead electricity of measuring and controlling equipment access and opens into information, and this dead electricity is opened into information and comprised that protecting dead electricity to open into information and operation dead electricity opens into information;
(2) receiving terminal transforming plant protecting device detects in real time the offside information receiving, and by relatively protecting the information of bandwidth and observing and controlling bandwidth, provides in real time the judgement whether Secondary Direct Electrical Resources of offside transformer station disappears.
2. a kind of method that judges far-end substation secondary DC supply interruption as claimed in claim 1, is characterized in that in described step (2), concrete basis for estimation is as follows:
A) observing and controlling band data receives normal and receives offside protection dead electricity information, protects bandwidth data receiver to interrupt simultaneously, is judged as offside secondary direct current protecting power supply and disappears;
B) observing and controlling band data receives normal and receives offside operation dead electricity information, protects bandwidth data receiver normal simultaneously, is judged as offside secondary direct current operative power source and disappears;
C) observing and controlling bandwidth and protection bandwidth data receiver all interrupt, and are judged as communication loop fault;
D) observing and controlling band data receives normally and does not receive any dead electricity information of offside, and protection bandwidth data receiver interrupts, and is judged as offside protective device fault or protective device communication interface fault;
E) observing and controlling band data receive interruption, protection bandwidth data receiver is normal, is judged as offside measure and control device fault or measure and control device communication interface fault.
3. a kind of method that judges far-end substation secondary DC supply interruption as claimed in claim 1 or 2, it is characterized in that: described judgement far-end substation secondary DC supply interruption adopts the mode of single judgement or comprehensive judgement, single judgement refers to that arbitrary transformer station judges the second adjacent with it substation secondary DC supply interruption, thinks described the second substation secondary DC supply interruption; Described comprehensive judgement refers to that all transformer stations adjacent with described the second transformer station all judge this second substation secondary DC supply interruption, thinks this second substation secondary DC supply interruption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310526765.4A CN104079066B (en) | 2013-10-30 | 2013-10-30 | Method for judging disappearance of secondary direct-current power supply of far-end transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310526765.4A CN104079066B (en) | 2013-10-30 | 2013-10-30 | Method for judging disappearance of secondary direct-current power supply of far-end transformer substation |
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| Publication Number | Publication Date |
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| CN104079066A true CN104079066A (en) | 2014-10-01 |
| CN104079066B CN104079066B (en) | 2015-07-08 |
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| CN201310526765.4A Expired - Fee Related CN104079066B (en) | 2013-10-30 | 2013-10-30 | Method for judging disappearance of secondary direct-current power supply of far-end transformer substation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977546A (en) * | 2015-06-29 | 2015-10-14 | 广东电网有限责任公司江门供电局 | Secondary direct-current power source loss discriminating method for substations |
| CN107230966A (en) * | 2017-07-06 | 2017-10-03 | 成都交大许继电气有限责任公司 | Traction substation direct current dead electricity emergency protection system and method |
| 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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| CN201601527U (en) * | 2009-12-31 | 2010-10-06 | 煤炭科学研究总院重庆研究院 | Low-voltage comprehensive-protection power-off delay device |
| CN201887560U (en) * | 2010-12-17 | 2011-06-29 | 宝鸡供电局 | Real-time remote direct current monitoring network system |
| JP5083886B2 (en) * | 2007-12-05 | 2012-11-28 | 株式会社大都技研 | Amusement stand |
| CN203180629U (en) * | 2013-03-01 | 2013-09-04 | 深圳市泰昂能源科技股份有限公司 | Double-detection device of DC power supply of transformer station |
| CN103337912A (en) * | 2013-07-22 | 2013-10-02 | 国家电网公司 | Master monitoring device of AC/DC (Alternating Current/Direct Current) integration power supply |
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2013
- 2013-10-30 CN CN201310526765.4A patent/CN104079066B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5083886B2 (en) * | 2007-12-05 | 2012-11-28 | 株式会社大都技研 | Amusement stand |
| CN201601527U (en) * | 2009-12-31 | 2010-10-06 | 煤炭科学研究总院重庆研究院 | Low-voltage comprehensive-protection power-off delay device |
| CN201887560U (en) * | 2010-12-17 | 2011-06-29 | 宝鸡供电局 | Real-time remote direct current monitoring network system |
| CN203180629U (en) * | 2013-03-01 | 2013-09-04 | 深圳市泰昂能源科技股份有限公司 | Double-detection device of DC power supply of transformer station |
| CN103337912A (en) * | 2013-07-22 | 2013-10-02 | 国家电网公司 | Master monitoring device of AC/DC (Alternating Current/Direct Current) integration power supply |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977546A (en) * | 2015-06-29 | 2015-10-14 | 广东电网有限责任公司江门供电局 | Secondary direct-current power source loss discriminating method for substations |
| 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 |
| CN107230966A (en) * | 2017-07-06 | 2017-10-03 | 成都交大许继电气有限责任公司 | Traction substation direct current dead electricity emergency protection system and 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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| Publication number | Publication date |
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| CN104079066B (en) | 2015-07-08 |
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Granted publication date: 20150708 |