CN101051581A - Interlocking reverse overflow relay protective plan - Google Patents
Interlocking reverse overflow relay protective plan Download PDFInfo
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- CN101051581A CN101051581A CN 200710020369 CN200710020369A CN101051581A CN 101051581 A CN101051581 A CN 101051581A CN 200710020369 CN200710020369 CN 200710020369 CN 200710020369 A CN200710020369 A CN 200710020369A CN 101051581 A CN101051581 A CN 101051581A
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Abstract
Being suitable to AC power supply system such as underground etc, over current relay protection scheme is controlled by corresponding program written to embedded type microcomputer. Characters are that a subsidiary contact of a dedicated relay in relay protection device corresponding to back-to-back breaker is connected to opening input of counterpart breaker in order to transfer latching logic signal one another. The scheme can implement effective protections for determined breaker failure, bus bar fault, disconnection of latching line, protection quitting, and optical fiber longitudinal difference quitting (OFLDQ) etc. Combining with conventional OFLDQ and protection quitting, the invention constitutes a self-contained protection scheme. The scheme is capable of linking any number of sites without going beyond maximum time limit allowed by main transformer station. Features are: simplified mode of connection, and reducing investment on high voltage cable of underground etc.
Description
Technical field
The present invention relates to electrical technology field, specifically a kind of interlocking reverse overflow relay protective plan that can be applicable in the electric power systems such as subway.
Background technology
Give an example in the application of City Rail Transit System: the city rail ac power supply system, adopt centralized power supply system morely, promptly by several main transformer stations,,, adopt on-link mode (OLM) each website power supply to subway through step-down the alternating current of national grid.
Because subway has the intermittence impact load, the power supply capacity that needs is also little, especially when the few compartment operational mode that adopts four joint compartments, so allow the more website of link.
The protection system of track traffic ac power supply system is provided with optical-fiber longitudinal difference usually as main protection, according to the staged principle specified time overcurrent protection is set simultaneously and protects in support, and the two combination constitutes the complete protection system.But there is the maximum requirement that allows the time limit in the main transformer station that gives subway power supply, thus can not be too many according to the specified time overcurrent protection of staged principle setting, otherwise the time limit can surpass the requirement of main transformer station.This mode that causes linking more website can't realize.
Summary of the invention
For addressing the above problem; the object of the present invention is to provide a kind of interlocking reverse overflow relay protective plan with complete backup protection function; make that conventional many groups ac power cable of drawing to a certain direction from a main transformer station is simplified to one group of cable becomes possibility; this can not only save ac power cable; reduce the outlet circuit breaker of main transformer station, save a large amount of investments, and the energy simplified system mode of connection; the simplified system operation helps safe operation.
The present invention takes following technical scheme to realize:
Interlocking reverse overflow relay protective plan; utilizing embedded computer to write corresponding program controls; it is characterized in that: a secondary contact of a special purpose relay in the protective relaying device of circuit breaker correspondence back-to-back receive mutually the other side open into; transmit the latching logic signal mutually, thereby realize effective protection various faults.
The invention has the beneficial effects as follows: interlocking reverse overflow relay protective plan of the present invention make full use of each the station in every loop line road back-to-back circuit breaker have and have only a pair of; and they are in same station; lean on very closely mutually; can interconnect the characteristics of locking line easily; can not increase too big workload; also can not reduce the reliability of system, thereby make the two can constitute nearly backup protection and other protection easily mutually.
This protection scheme has solved local iron chains and has gone to the station to meet somebody when a little too much, and there is the problem that exceeds the maximum time limit that main transformer station allows in the time limit that the reserve overcurrent protection is adjusted according to the staged principle.Use this relay protective plan; in conjunction with conventional optical-fiber longitudinal difference and overcurrent protection; thereby constitute a complete protection scheme; can not only link many arbitrarily websites; and can not exceed the maximum time limit that main transformer station allows; and the energy simplified system mode of connection, the simplified system operation helps safe operation.This relay has novelty, is easy to realize, do not increase the characteristics of extra investment, can reduce the investment of subway high-tension cable significantly, has very high economic benefit.
Description of drawings
Fig. 1 is that interlocking reverse overflow relay protective plan of the present invention is at subway ac power supply system line schematic diagram.
Embodiment
Specifically introduce the present invention for example below in conjunction with accompanying drawing.
Here stipulate that from the direction of bus sensing circuit be forward and reverse, behind so it can move reverse overcurrent relay when breaking down in protection.
During the special purpose relay junction closure, open, when contact is opened, open into being defined as " 0 " into being defined as " 1 ".
After the normal operation of protection, special purpose relay is carried out excitation, its normal opened contact closure is opened into long-term newspaper " 1 ", does not report to the police.
After breaking down, the not outlet if protection component moves, then its special purpose relay contact sends the 1st kind of pulse, and for example the ratio of " closure " and " opening " is 2: 1 a pulse signal.
After the protection component action outlet, closed after its contact is opened 100 milliseconds, promptly open into " 0 " of receiving 100 milliseconds.
If mutually the locking line disconnects or protects out of servicely, to open into long-term newspaper " 0 " just, device is reported to the police.
Every one hour, special purpose relay sent 10 seconds the 2nd kind of pulse, and for example the ratio of " closure " and " opening " is 1: 1 pulse, was used for monitoring mutually whether protection is working properly back-to-back.Do not need to protect back-to-back by 232 or 485 exchange heartbeat messages to monitor mutually, but simplified design and field connection like this.
The concrete scheme of interlocking reverse overflow relay and other protection of matching with it thereof:
The time limit unification of below discussing is meant from fault and picks up counting the zero hour.
(1) is used to prevent that unified the adjusting of interlocking reverse overflow protection time limit of breaker failure is a little time-delay back-to-back, for example 20 milliseconds.In order to simplify and to distinguish, this protection abbreviates " malfunctioning interlocking reverse overflow protection " as.
It will see that before tripping operation i.e. " closure ", " pulse " and " opening " 3 states appearred, in the leaving of protection back-to-back of receiving.Wherein " pulse " state is meant aforesaid in the protection component action but less than outlet; send the 1st kind of pulse; " closure " of this state is 2: 1 with the ratio of " opening "; why design this " pulse " state; be to disconnect suddenly or protection reason such as is withdrawed from and made that the protection erroneous judgement is disconnected, cause possible malfunction for the line that prevents to be used for locking.Surpass 100 milliseconds if the 3rd state receiving of protection " opened ", just think breaker failure back-to-back, this protects tripping operation, to realize nearly reserve.
Though it is a little time-delay that this protection time limit adjusts, but because it will see that before tripping operation 3 states appearred in the leaving of protection back-to-back of receiving, therefore, if protection is the optical-fiber longitudinal difference tripping operation back-to-back, but breaker failure, be about 100 milliseconds actual outlet operate time of this protection; If protect optical-fiber longitudinal difference to withdraw from back-to-back, be limited to 2*DT during its forward over-current adjusting, then be the 2DT+100 millisecond actual outlet operate time of this protection, less than 3DT.
(2) unified the adjusting of reverse overcurrent protection time limit that is used to isolate the mutual locking of following busbar fault is 1DT.In order to simplify and to distinguish, this protection abbreviates " protection of bus interlocking reverse overflow " as.
It will see that before tripping operation 2 states appearred in the leaving of protection back-to-back of receiving, i.e. " closure " and " pulse ", this pulse is the 3rd kind of pulse, for example " closure " of its " pulse " state is 1: 2 with the ratio of " opening ".The prerequisite of sending " pulse " state is once to be pressed with stream, occurs three-phase then and becomes nothing pressure nothing stream or the little electric current of low pressure, perhaps has a phase or the little electric current of two-phase low pressure.This " pulse " state representation is protected back-to-back and is felt that it breaks down behind, and this protection reverse overcurrent protection action, the two condition all satisfies, and just represents fault between the two, i.e. the outgoing of the bus of this institute or bus.
(3) if monitoring back-to-back the mutual locking line of protection disconnects or protect out of servicely, then be limited to 3DT during the reverse overcurrent protection.In order to simplify and to distinguish, this protection abbreviates " protection of broken string interlocking reverse overflow " as.
(4) after optical-fiber longitudinal difference withdraws from, drop into the forward overcurrent protection, the time limit, unified adjusting was 2DT.
(5) nondirectional overcurrent protection is set, the time be limited to 4DT as total reserve, can be the same with the time limit of main transformer station.
(6) tail end line still is provided with optical-fiber longitudinal difference, and end stations is provided with the reverse overcurrent protection of unrestricted condition, is limited to 1DT at that time.
(7) optical-fiber longitudinal difference has jumping function far away, if there is a side that the protection tripping operation takes place, is not that hand is jumped, then by the optical fiber jumping offside that says the word.
Various faults and the analysis of protection action behavior: consider to be short-circuited at any place; at any place following various abnormal conditions take place again: fiber failure, breaker failure, protection are withdrawed from, mutual locking line disconnects, busbar fault, and protection can overstep tripping.Wherein the B place is an end stations.
| Fault type | Protection action behavior (time all is to count when fault takes place herein) |
| Busbar fault below the B | |
| B～C circuit optical fiber is normal | The B place, fault is excised in the reverse overcurrent protection behind the 1DT |
| B～C circuit optical fiber withdraws from | The B place, fault is excised in the reverse overcurrent protection behind the 1DT |
| B～C circuit optical fiber is normal, the B breaker failure | The C place, optical-fiber longitudinal difference excises fault behind the 1DT |
| B～C circuit optical fiber withdraws from, the B breaker failure | The C place, fault is excised in the forward overcurrent protection behind the 2DT |
| B～C circuit optical fiber is normal, B | The C place regards optical fiber as and withdraws from, and fault is excised in the forward overcurrent protection behind the 2DT |
| Protection is withdrawed from | |
| B～C circuit optical fiber withdraws from, and the B protection is withdrawed from | The C place, fault is excised in the forward overcurrent protection behind the 2DT |
| B～C circuit optical fiber is normal, the B breaker failure, and other place's optical fiber withdraws from | The C place, optical-fiber longitudinal difference excises fault behind the 1DT |
| B～C circuit optical fiber is normal, and other place's optical fiber withdraws from | The B place, fault is excised in the reverse overcurrent protection behind the 1DT |
| B～C circuit optical fiber is normal, and the D protection is withdrawed from | The B place, fault is excised in the reverse overcurrent protection behind the 1DT |
| B～C circuit optical fiber withdraws from, and the D protection is withdrawed from | The B place, fault is excised in the reverse overcurrent protection behind the 1DT |
| Mutual locking line between C and the D disconnects | The B place, fault is excised in the reverse overcurrent protection behind the 1DT |
| B～C line fault | |
| B～C circuit optical fiber is normal | B, C place, optical-fiber longitudinal difference, instantaneous excision fault |
| B～C circuit optical fiber withdraws from | The C place, fault is excised in the forward overcurrent protection behind the 2DT |
| B～C circuit optical fiber is normal, the C breaker failure | The D place, the protection of malfunctioning interlocking reverse overflow is excised fault after 100 milliseconds |
| B～C circuit optical fiber withdraws from, the C breaker failure | The D place, malfunctioning interlocking reverse overflow protection is excised fault behind the 2DT+100 millisecond |
| B～C circuit optical fiber is normal, the B breaker failure | The C place, optical-fiber longitudinal difference, instantaneous excision fault, the jumping position of B does not become 1, and the prepared auto restart segmentation of not joining can the expansion accident |
| B～C circuit optical fiber withdraws from, the B breaker failure | The C place, fault is excised in the forward overcurrent protection behind the 2DT, and the jumping position of B does not become 1, and the prepared auto restart segmentation of not joining can the expansion accident |
| The C protection is withdrawed from | The D place, fault is excised in the protection of broken string interlocking reverse overflow behind the 3DT |
| B～C circuit optical fiber is normal, and other place's optical fiber withdraws from | B, C place, optical-fiber longitudinal difference, instantaneous excision fault |
| B～C circuit optical fiber is normal, and the mutual locking line between E and the F disconnects | B, C place, optical-fiber longitudinal difference, instantaneous excision fault |
| B～C circuit optical fiber is normal, and E or F protection are withdrawed from | B, C place, optical-fiber longitudinal difference, instantaneous excision fault |
| B～C circuit optical fiber withdraws from, and E or F protection are withdrawed from | The C place, fault is excised in the forward overcurrent protection behind the 2DT |
| Busbar fault below the D |
| D～E circuit optical fiber is normal | The D place, fault is excised in the protection of bus interlocking reverse overflow behind the 1DT |
| D～E circuit optical fiber withdraws from | The D place, fault is excised in the protection of bus interlocking reverse overflow behind the 1DT |
| D～E circuit optical fiber is normal, the D breaker failure | The E place, optical-fiber longitudinal difference excises fault behind the 1DT |
| D～E circuit optical fiber withdraws from, the D breaker failure | The E place, fault is excised in the forward overcurrent protection behind the 2DT |
| D～E circuit optical fiber is normal, and the D protection is withdrawed from | The E place regards optical fiber as and withdraws from, and fault is excised in the forward overcurrent protection behind the 2DT |
| D～E circuit optical fiber withdraws from, and the D protection is withdrawed from | The E place, fault is excised in the forward overcurrent protection behind the 2DT |
| D～E circuit optical fiber is normal, the D breaker failure, and other place's optical fiber withdraws from | The E place, optical-fiber longitudinal difference excises fault behind the 1DT |
| D～E circuit optical fiber is normal, and other place's optical fiber withdraws from | The D place, fault is excised in the protection of bus interlocking reverse overflow behind the 1DT |
| D～E circuit optical fiber is normal, and E or F protection are withdrawed from | The D place, fault is excised in the protection of bus interlocking reverse overflow behind the 1DT |
| D～E circuit optical fiber withdraws from, and E or F protection are withdrawed from | The D place, fault is excised in the protection of bus interlocking reverse overflow behind the 1DT |
| D～E circuit optical fiber is normal, and the mutual locking line between E and the F disconnects | The D place, fault is excised in the protection of bus interlocking reverse overflow behind the 1DT |
| D～E, F～G, H～I ... line fault | The protection behavior of similar aforesaid B～C line fault |
| F, H ... following busbar fault | The protection behavior of busbar fault below the similar aforesaid D |
Below announced the present invention with preferred embodiment, so it is not in order to restriction the present invention, and all technical schemes that scheme obtained of taking to be equal to replacement or equivalent transformation all drop in protection scope of the present invention.
Claims (1)
1, interlocking reverse overflow relay protective plan; utilizing embedded computer to write corresponding program controls; it is characterized in that: a secondary contact of a special purpose relay in the protective relaying device of circuit breaker correspondence back-to-back receive mutually the other side open into; transmit the latching logic signal mutually, thereby realize effective protection various faults.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100203699A CN101051581B (en) | 2007-02-15 | 2007-02-15 | Error identification method of digital transformer differential protection for preventing TA secondary loop fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100203699A CN101051581B (en) | 2007-02-15 | 2007-02-15 | Error identification method of digital transformer differential protection for preventing TA secondary loop fault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101051581A true CN101051581A (en) | 2007-10-10 |
| CN101051581B CN101051581B (en) | 2010-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100203699A Active CN101051581B (en) | 2007-02-15 | 2007-02-15 | Error identification method of digital transformer differential protection for preventing TA secondary loop fault |
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| Country | Link |
|---|---|
| CN (1) | CN101051581B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854057A (en) * | 2010-06-10 | 2010-10-06 | 南京国电南自轨道交通工程有限公司 | Novel method for protecting subway 10 kV/35 kV ring network power supply circuit |
| CN103427480A (en) * | 2013-08-21 | 2013-12-04 | 南京弘毅电气自动化有限公司 | Universal remote spare power automatic switching system |
| CN106410646A (en) * | 2016-11-07 | 2017-02-15 | 河钢股份有限公司邯郸分公司 | Fault rapid determining and processing operation method of AC-DC-AC high-voltage frequency converter |
-
2007
- 2007-02-15 CN CN2007100203699A patent/CN101051581B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854057A (en) * | 2010-06-10 | 2010-10-06 | 南京国电南自轨道交通工程有限公司 | Novel method for protecting subway 10 kV/35 kV ring network power supply circuit |
| CN101854057B (en) * | 2010-06-10 | 2012-11-14 | 南京国电南自轨道交通工程有限公司 | Novel method for protecting subway 10 kV/35 kV ring network power supply circuit |
| CN103427480A (en) * | 2013-08-21 | 2013-12-04 | 南京弘毅电气自动化有限公司 | Universal remote spare power automatic switching system |
| CN103427480B (en) * | 2013-08-21 | 2016-07-13 | 南京弘毅电气自动化有限公司 | A kind of general remote spare power source automatic transfer system |
| CN106410646A (en) * | 2016-11-07 | 2017-02-15 | 河钢股份有限公司邯郸分公司 | Fault rapid determining and processing operation method of AC-DC-AC high-voltage frequency converter |
| CN106410646B (en) * | 2016-11-07 | 2018-02-06 | 河钢股份有限公司邯郸分公司 | A kind of failure for handing over orthogonal high voltage converter quickly judges and processing operating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101051581B (en) | 2010-09-22 |
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Legal Events
| Date | Code | Title | Description |
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| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Dong Jianlin Xue Boqi Document name: Written notice of preliminary examination of application for patent for invention |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CI01 | Correction of invention patent gazette |
Correction item: Denomination of Invention Correct: Mutual latching reverse overcurrent relay protection method False: Discrimination method of digital transformer differential protection to prevent malfunction of TA two circuit fault Number: 38 Volume: 26 |
|
| CI03 | Correction of invention patent |
Correction item: Denomination of Invention Correct: Mutual latching reverse overcurrent relay protection method False: Discrimination method of digital transformer differential protection to prevent malfunction of TA two circuit fault Number: 38 Page: Description Volume: 26 |
|
| ERR | Gazette correction |
Free format text: CORRECT: INVENTION NAME; FROM: DIGITAL TRANSFORMER DIFFERENTIAL PROTECTION TO PREVENT TA SECONDARY CIRCUIT MALFUNCTION DISCRIMINATE METHOD TO: LATCHING EACH OTHER REVERSE OVERCURRENT RELAY PROTECTED METHOD |
|
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Gang Inventor after: Wang Jun Inventor after: Jiang Ping Inventor after: Zhang Shenming Inventor after: Ma Yuankui Inventor before: Li Gang Inventor before: Wang Jun Inventor before: Jiang Ping Inventor before: Zhang Shenming Inventor before: Ma Yuankui Inventor before: Bo Fanqiang Inventor before: Xi Guofu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI GANG WANG JUN JIANG PING ZHANG SHENMING MA YUANKUI BU FANQIANG XI GUOFUTO: LI GANG WANG JUN JIANG PING ZHANG SHENMING MA YUANKUI |
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| ASS | Succession or assignment of patent right |
Owner name: NARI NANJING CONTROL SYSTEM LTD. Effective date: 20141201 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20141201 Address after: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Patentee after: NARI Technology Development Co., Ltd. Patentee after: SGCC NARI Nanjing Control System Co., Ltd. Address before: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Patentee before: NARI Technology Development Co., Ltd. |