CN100448132C - Integrated protection system based on electric current principle - Google Patents
Integrated protection system based on electric current principle Download PDFInfo
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- CN100448132C CN100448132C CNB2006100122288A CN200610012228A CN100448132C CN 100448132 C CN100448132 C CN 100448132C CN B2006100122288 A CNB2006100122288 A CN B2006100122288A CN 200610012228 A CN200610012228 A CN 200610012228A CN 100448132 C CN100448132 C CN 100448132C
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Abstract
The present invention discloses an integrated protective system based on the electric current principle. The present invention comprises a plurality of component elements, such as an instantaneous trip unit, an accelerating trip unit, a backup direct trip unit, etc. An integrated overcurrent relay (IOR) is installed on a bus bar of each substation, and meanwhile, the IOR is connected with each current transformer on all outlet lines of the bus bar. The relay is also connected with a potential transformer (PT) connected with the bus bar so that the measurement of direction can be conducted. A first stage (I stage) is a direction overcurrent instantaneous trip stage; a second stage (II stage) is the accelerating trip unit which is realized by making use of a direction comparison technology of a power distribution system of a communication channel or making use of no channel technology; a third stage (III stage), an integrated network protective unit (INP) collects fault information and direction information sent out by all of the IORs from a network. Through comparison, a faulty circuit is judged, and a trip order is directly sent to a relay device of the faulty circuit.
Description
Technical field
The present invention relates to a kind of power protection system, more particularly relate to a kind of relay protection of transmission line system, belong to electric power and carry the resist technology field.
Background technology
Along with the development of the Protection Technology and the network communications technology, in the protecting electrical power system field, the protection system of concentrating more and more causes people's attention.For the concentrated protection that acquires a certain degree, there has been increasing defencive function to be combined in the protection equipment.For example, computer line protection can with apart from or electric current etc. to have a protection of difference in functionality integrated as main protection, also can be with integrated protection in support such as direction protection and overcurrent protection.Yet these protections all are based on independent electric equipment and install, and are still bringing into play leading role based on the various protection philosophies of power frequency component.
Summary of the invention
The objective of the invention is for the continuous expansion of satisfying electric power networks to the demand of quick removing fault with enhanced system stability, and a kind of integrated protection system based on electric current principle is proposed, its integrated overcurrent relay (IOR) comprises the faulty line selected cell, instantaneous trip unit based on the overcurrent definite value, quicken the tripping operation channel unit, no passage quickens trip unit and the direct trip unit of INP and two communication interface I, II; The objective of the invention is to be achieved through the following technical solutions, may further comprise the steps:
Integrated overcurrent relay (IOR) is installed on the bus of each transformer station, simultaneously each current transformer (CT) in all outlets of integrated overcurrent relay (IOR) and this bus links to each other, and this integrated overcurrent relay (IOR) also is connected so that the measurement of travel direction with the voltage transformer (PT) of connection bus.Integrated overcurrent relay (IOR) had both disposed the traditional protection function, had new defencive function characteristic again.This scheme can be divided into three operation phase:
Phase I is the instantaneous tripping operation stage of direction overcurrent; each integrated overcurrent relay (IOR) is provided with a plurality of overcurrent setting values; to protect the whole transmission line that is attached thereto; this integrated overcurrent relay (IOR) can by calculate with setting value relatively, judge whether in its protection range and the circuit breaker trip that instantaneous starting links to each other with faulty line.Simultaneously, by communication port, integrated overcurrent relay (IOR) but sending direction information is given the integrated overcurrent relay of far-end (IOR) and integrated network protection unit (INP); .
If integrated overcurrent relay (IOR) is instantaneous operation not, drop into the protection second stage so, this stage is realized two big defencive functions, one of them depends on whether the two ends integrated overcurrent relay (IOR) of protected circuit have communication port, when the communication port that will quicken to trip satisfies the real time communication requirement, the direction comparison techniques of using distribution system realizes quickening tripping operation, otherwise, use the no passage technology of distribution system and realize quickening tripping operation as two of function;
Phase III; integrated network protection unit (INP) the fault direction information that all integrated overcurrent relays (IOR) in the automatic network send of collecting; judge faulty line by each fault direction information of relatively receiving; integrated network protection unit (INP) directly sends the integrated overcurrent relay (IOR) of trip signal to faulty line according to above judgement.
The present invention is based on the overcurrent technology; from the information that many distribution lines obtained; the integrated protection that constitutes; can be used to derive new protection philosophy and function; this integrated protection not only provides quick protection for the single hop circuit; and can protect the whole transmission line that links to each other with integrated overcurrent relay (IOR), also can realize the integrated network protection function to whole system.Continuous development along with signal processing technology, measurement, communication and process treatment technology; this scheme is with respect to existing independent protective technology based on independent electric equipment; has remarkable advantages; described scheme can improve the performance of protection comprehensively; it is easy to management or easy to use; but and have economy and practicality, will have broad application prospects in electric power system.
Description of drawings
Fig. 1 is the integrated protection system schematic diagram based on electric current principle of the present invention;
Fig. 2 is integrated overcurrent relay of the present invention (IOR) Elementary Function block diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further described.
As shown in Figure 1, the integrated protection system based on electric current principle that the present invention proposes is to realize that by following technology described step comprises:
When F1 breaks down at the place on the circuit 2, integrated overcurrent relay (IOR) all can detect fault as integrated overcurrent relay IOR1, IOR2 and IOR3 in the system, in this case, IOR1 will can not make a response to fault immediately, because fault has exceeded its instantaneous operation scope; For circuit 2, if the size of fault current has surpassed the setting value of IOR2, IOR2 can trip immediately, otherwise will postpone tripping operation; Behind IOR2 tripping faulty line, fault is cut, and IOR1 will return.
Meanwhile; IOR2 can send to fault direction information integrated network protection unit (INP); if communication port meets the demands; also give each relevant integrated overcurrent relay (IOR) with sending direction information; communication channel when between IOR2 and IOR3 meets the demands; IOR3 can be by relatively more local fault message and the fault direction information of being sent by IOR2, the corresponding faulty line of tripping.
If communication channel does not meet the demands, adopt the low-voltage direction component in the no path protection technology, IOR3 can detect a low-voltage direction fault message, also can provide the acceleration trip avoidance function behind the instantaneous tripping faulty line of IOR2; In both cases, fault all can be from two tip cut-offs of faulty line, and for traditional protection scheme, fault can only be from the active tip cut-off of circuit.
Above-mentioned mentioning; all detect the integrated overcurrent relay (IOR) of fault message all can note fault direction; be sent to integrated network protection unit (INP) by communication network; can be easy to determine faulty line in this unit; if also not by relevant integrated overcurrent relay (IOR) tripping, integrated network protection unit (INP) will directly send the circuit breaker of trip signal to the faulty line two ends to the circuit breaker at faulty line two ends.In this case; integrated network protection unit (INP) can relatively come from the directional information of integrated overcurrent relay IOR1, IOR2, IOR3, IOR4 and IOR5; thereby clearly judge faulty section is circuit 2, and directly sends trip signal to IOR2 and IOR3 by integrated network protection unit (INP).
Fig. 2 is the functional block diagram of the integrated overcurrent relay of the present invention (IOR) unit, it comprises the faulty line selected cell, based on the instantaneous trip unit of overcurrent setting value, based on the vertical tripping operation channel unit of communication, no passage acceleration trip unit and the direct trip unit of INP, also comprise two communication interface I, II simultaneously.
The definite faulty line that links to each other with integrated overcurrent relay (IOR) installation place bus of faulty line selected cell, utilize direction component or transient state direction comparison techniques, in case faulty line or direction are detected, instantaneous trip unit can select the definite value relevant with faulty line relatively from a plurality of current rations unit, determines whether instantaneous tripping operation.
Vertical trip unit based on communication, utilize custom-designed distribution system direction comparison techniques, in case detect fault message not in instantaneous trip unit scope, integrated overcurrent relay (IOR) can be given each the integrated overcurrent relay (IOR) that links to each other with faulty line by communication interface I sending direction information, waits for the information of being sent from other integrated overcurrent relays (IOR) simultaneously.In case local directional information is consistent with the integrated overcurrent relay in a corresponding distant place (IOR) directional information, integrated overcurrent relay (IOR) can drive the relative breaker tripping operation.
Communication interface I is a multichannel communication unit, under the situation that the communication technology meets the demands, is responsible for sending and receiving the information of the integrated overcurrent relay in each distant place (IOR) of line related.
No passage quickens trip unit (NCA), and meaning does not need communication channel and quicken tripping operation.It can be when instantaneous trip signal is carried out starts, and in other words, is that fault starts not in instantaneous tripping operation scope the time.The basic principle that no passage quickens tripping operation is by far-end circuit breaker action situation is detected to determine whether to quicken tripping operation.There are two characteristics the NCA unit, at first, replaces waiting for the delay tripping of set time, and the NCA unit quickens the tripping faulty line; Moreover for the single power supply system, NCA can trip from the load side of faulty line, thereby makes the both sides excision of fault from circuit.
Each integrated overcurrent relay (IOR) sends fault direction information for integrated network protection unit (INP), and receives direct trip signal by communication interface (II).Integrated network protection unit (INP) is easy to determine faulty line by the directional information that each the integrated overcurrent relay (IOR) that relatively comes from the network protection scope sends.Obviously, integrated network protection unit (INP) can coordinate wide area control and protection system, to keep the stability of system.
The present invention is a kind of integrated protection system based on electric current principle, can be used for complicated distribution and constitute relaying protection system.
Above-mentioned instantiation has been described in realization in order to demonstrate the invention.Should be understood that other variations of the present invention and modification it will be apparent to those skilled in the art that the present invention is not limited to described embodiment.Therefore, at the true spirit of the disclosed content of the present invention and any/all modifications, variation or the equivalent transformation in the basic principle scope, all belong to claim protection range of the present invention.
Claims (2)
1, a kind of integrated protection system based on electric current principle is characterized in that: the integrated protection system based on electric current principle comprises that faulty line selected cell, the instantaneous trip unit based on the overcurrent definite value, acceleration tripping operation channel unit, no passage quicken trip unit and the direct trip unit of INP and first communication interface (I) and second communication interface (II); First communication interface is responsible for sending and receiving the information of the integrated overcurrent relay in each distant place (IOR) of line related under the situation that the communication technology meets the demands; Each integrated overcurrent relay (IOR) sends fault direction information for integrated network protection unit (INP), and receives direct trip signal by second communication interface (II); Integrated overcurrent relay (IOR) is installed on the bus of each transformer station, simultaneously each current transformer (CT) in all outlets of integrated overcurrent relay (IOR) and this bus links to each other, and this integrated overcurrent relay (IOR) also is connected so that the measurement of travel direction with the voltage transformer (PT) of connection bus; Its defencive function divides three phases:
Phase I is the instantaneous tripping operation stage of direction overcurrent, each integrated overcurrent relay (IOR) is provided with a plurality of overcurrent setting values, to protect the whole transmission line that is attached thereto, simultaneously, give the integrated overcurrent relay in a distant place (IOR) and integrated network protection unit (INP) by communication port sending direction information;
If integrated overcurrent relay (IOR) is instantaneous operation not, drop into the protection second stage so, when the communication port that will quicken to trip satisfies the real time communication requirement, the direction comparison techniques of using distribution system realizes quickening tripping operation, discontented when full during communicating requirement when communication port, use the no passage technology of distribution system and realize quickening tripping operation;
Phase III; integrated network protection unit (INP) the fault direction information that all integrated overcurrent relays (IOR) in the automatic network send of collecting; judge faulty line by each fault direction information of relatively receiving; if preceding two stages are tripping operation not, directly send the integrated overcurrent relay (IOR) of trip signal to faulty line.
2, a kind of integrated protection system according to claim 1 based on electric current principle, it is characterized in that: the definite faulty line that links to each other with bus of faulty line selected cell, utilize direction component or transient state direction comparison techniques, in case faulty line or direction are monitored to, instantaneous trip unit is according to the data of a plurality of current calibration value cells, relatively the relevant parameter of faulty line determines whether instantaneous tripping operation; Second stage is quickened the tripping operation channel unit based on the direction comparison techniques that is specifically designed to distribution system; Each integrated overcurrent relay (IOR) is given integrated network protection unit (INP) transmission fault direction information and is received direct trip signal by second communication interface (II); Faulty line is determined by the directional information that the integrated overcurrent relay (IOR) that relatively comes from the network protection scope sends in integrated network protection unit (INP); Wide area control and protection system are coordinated in integrated network protection unit (INP), keep the stability of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100122288A CN100448132C (en) | 2006-06-13 | 2006-06-13 | Integrated protection system based on electric current principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100122288A CN100448132C (en) | 2006-06-13 | 2006-06-13 | Integrated protection system based on electric current principle |
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| Publication Number | Publication Date |
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| CN1866660A CN1866660A (en) | 2006-11-22 |
| CN100448132C true CN100448132C (en) | 2008-12-31 |
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| CNB2006100122288A Expired - Fee Related CN100448132C (en) | 2006-06-13 | 2006-06-13 | Integrated protection system based on electric current principle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102761106B (en) * | 2012-07-10 | 2014-10-22 | 清华大学 | Quick starting and vector calculation method for intelligent substation integrated protection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030212473A1 (en) * | 2002-02-25 | 2003-11-13 | General Electric Company | Processing system for a power distribution system |
| CN1725590A (en) * | 2005-06-28 | 2006-01-25 | 山东大学 | Step down transformer and relay protection method of middle low voltage side bus |
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2006
- 2006-06-13 CN CNB2006100122288A patent/CN100448132C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030212473A1 (en) * | 2002-02-25 | 2003-11-13 | General Electric Company | Processing system for a power distribution system |
| CN1725590A (en) * | 2005-06-28 | 2006-01-25 | 山东大学 | Step down transformer and relay protection method of middle low voltage side bus |
Non-Patent Citations (4)
| Title |
|---|
| 电力系统的集成保护. 薄志谦等.继电器，第33卷第14期. 2005 |
| 电力系统的集成保护. 薄志谦等.继电器，第33卷第14期. 2005 * |
| 配电线路无通道保护研究. 施慎行等.电力系统自动化. 2001 |
| 配电线路无通道保护研究. 施慎行等.电力系统自动化. 2001 * |
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| CN1866660A (en) | 2006-11-22 |
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