CN101895101A - Distributed station domain protecting method for switching station - Google Patents
Distributed station domain protecting method for switching station Download PDFInfo
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- CN101895101A CN101895101A CN 201010222562 CN201010222562A CN101895101A CN 101895101 A CN101895101 A CN 101895101A CN 201010222562 CN201010222562 CN 201010222562 CN 201010222562 A CN201010222562 A CN 201010222562A CN 101895101 A CN101895101 A CN 101895101A
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- protection
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- switching station
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Abstract
The invention discloses a distributed station domain protecting method for a switching station. According to the method, the relay protection of the switching station does not depend on fault current values and acting time match any more, faults can be accurately and quickly cut, and protection selectivity is realized. Meanwhile, circuit breaker failure protection and bus protection are also realized. The protection level of the switching station is greatly improved. Meanwhile, the distributed station domain protection is basically the same as the traditional protective installation mode and the traditional running management mode, has high feasibility and is favorable for popularization and use; and when individual protection devices are damaged or overhauled, the method does not affect the operation of other protection devices, and has high maintainability and fault tolerance. The application of the method can eliminate the fault skip-level tripping phenomenon of the switching station and greatly reduce the extra power failure loss.
Description
Technical field
The invention belongs to relaying protection automatic field in the power engineering, relate to the present 6kV/10kV switching station of a kind of solution relaying protection matching problem, realize that optionally station domain protecting method is protected at the station entirely.
Background technology
Switching station generally is in the power distribution network end, and circuit breaker, current transformer and protective relaying device are all disposed in its inlet wire and outlet.The relaying protection function is based on the syllogic current protection.At present, switching station inlet wire and outlet relaying protection are the isolated protections that direct correlation does not take place each other.Cooperate into and out of fault current size during by short circuit and operation time limit between the line protection and to excise fault.For switching station, adjust to go up in topmost fast tripping protection (I section) and overcurrent protection (II section) and have two outstanding problems, make protection lose selectivity: the one, because outlet mostly is cable greatly, line length is also shorter, the short circuit current size is difficult to distinguish the fast tripping protection scope; The 2nd, because the operational management of " guarantor's major network " needs, (only about 0.3 second) is lacked in the overcurrent protection time-delay that is assigned to the electrical network end, makes to be difficult to cooperate on operation time limit into and out of the line overcurrent protection.
For this problem, treating method commonly used at present has two kinds:
One, current protections at different levels are not considered selective problems.In this case, when a certain outlet is short-circuited fault, can cause whole section bus even full the power failure.
Two, the inlet wire fast tripping protection does not put into operation, does not perhaps establish protection.Busbar fault is excised by higher level transformer station.For the switching station that is connected to public network, busbar fault makes the outlet tripping operation of upstream transformer station, will cause other load dead electricity on the circuit, has enlarged the power failure scope.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art deficiency, a kind of distributed station domain protecting method for switching station is provided, this method overcomes switching station protection works in isolation, can only lean on the shortcoming of short-circuit current value and time limit cooperation, reaches selectivity.
In the method for the present invention, the switching station protective relaying device adopts the GOOSE rapid message to carry out information exchange all by the networking of 100M Industrial Ethernet, and co-ordination forms the protection of territory, station.
When the switching station outlet produces short trouble:
Short circuit current flow through fault outlet and corresponding inlet wire, both relaying protection current elements start, when outlet protective current element starts, the outlet protection sends block signal to incoming relay-protection, incoming relay-protection is received block signal, closes the tripping operation outlet, and trip signal is sent out in the outlet protection, its circuit breaker of tripping, the outlet switch trip;
Behind the outlet switch trip, the outlet protection confirms that short circuit current disappears, and removes block signal, recovers the incoming relay-protection trip avoidance function, finishes failure removal;
If the outlet malfunctioning switch, short circuit current does not disappear, and outlet is protected after time-delay 100ms confirms breaker failure,, block signal is removed in the outlet protection, and the incoming relay-protection outlet is reopened, and the tripping lead-in circuit breaker is finished breaker fail protection;
When the busbar short-circuit fault:
Outlet does not have short circuit current, incoming relay-protection tripping lead-in circuit breaker, excision fault.
Distributed station domain protecting method of the present invention makes the switching station relaying protection no longer rely on fault current value and operate time to cooperate, and can excise fault accurately and rapidly, realizes the protection selectivity.Simultaneously, breaker fail protection and bus protection have also been realized.Improved switching station protection level greatly.Simultaneously, the distributed station domain protection is basic identical with traditional protection mounting means and operational management pattern, and the feasibility height is beneficial to and promotes the use of; When individual protection devices is damaged or overhaul, do not influence other protective devices operations, have very high maintainability and fault-tolerance.Application of the present invention can be eliminated switching station fault overstep tripping phenomenon, significantly reduces extra loss of outage.
Description of drawings
Fig. 1 is typical switching station main wiring diagram;
Fig. 2 is distributed station domain protection networking figure;
Fig. 3 is an outlet protection logic diagram;
Fig. 4 is the incoming relay-protection logic diagram;
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
Embodiment
With reference to shown in Figure 1, open and close the example of doing with the single mother partition main wiring mode of typical case and discuss the present invention.During normal the operation, service entrance switch 1DL, 2DL closure, block switch FDL is separately.Feeder switch 11DL, 12DL, 13DL, 21DL, 22DL, 23DL closure.Protective relaying device 1BH, 2BH, FBH, 11BH, 12BH, 13BH, 21BH, 22BH, 23BH adjust into: the quick-break current value is identical, delays time 0 second; Current quick-breaking (II section) current value is identical in limited time, delays time t1=0.3 second.1BH, 2BH fast tripping protection are provided with 30 milliseconds of action short time delays, as the buffer time of waiting for the block signal transmission.
With reference to shown in Figure 2, the Ethernet interface of protective relaying device 1BH, 2BH, FBH, 11BH, 12BH, 13BH, 21BH, 22BH, 23BH is connected to the Industrial Ethernet switch through super Category-5 twisted pair, forms the GOOSE net.The block signal message that the outlet protection produces transmits by the Ethernet-Tree mode.Sectionalised protection FBH and incoming relay-protection 1BH, 2BH can obtain these signals from network, and the information transmission delay is less than 10 milliseconds.
With reference to shown in Figure 3, current element I
I, I
IIEnabling signal warp or door H1 exclusive disjunction export Y1 to; While I
IEnabling signal exports H2 to, I
IIEnabling signal also outputs to after the t1 time-delay or door H2 carries out exclusive disjunction.The H2 output signal causes exit relay CKJ1, and Y1 is delivered in negate behind 120 millisecond time-delay simultaneously.Y1 output causes block signal BSJ.BSJ is input as at 1 o'clock, protection occurs and externally sends block signal, is that 0 o'clock transmission block signal is removed information.CKJ1 is input as at 1 o'clock, drives corresponding outlet switch trip.
With reference to shown in Figure 4, the block signal that each outlet protection is sent is all delivered to or door H3 carries out exclusive disjunction, and H3 output is delivered to and door Y2 through negate.Current element I
IEnabling signal is through 30 millisecond time-delay, I
IIEnabling signal outputs to after the t1 time-delay or door H4 carries out exclusive disjunction, delivers to Y2.Y2 output causes tripping relay CKJ2.CKJ2 is input as at 1 o'clock, drives corresponding service entrance switch tripping operation.
One, the protection behavioural analysis during the outlet short trouble
Suppose that 11DL is with circuit generation quick-break scope short trouble.At this moment, only flow through 1DL and 11DL of fault current.
1, as shown in Figure 3,11BH current element I
IStart, make H1, H2 output 1.Enter 120 millisecond time-delay after the H2 output 1.At this moment, Y1 output 1, block signal BSJ is effective.11BH sends block signal to network.CKJ1 action simultaneously makes the 11DL tripping operation.
2, as shown in Figure 4: 1BH current element I
IStart simultaneously, enter 30 millisecond time-delay.At this moment, H3 output 0, H4 output 0.Y2 output 0, CKJ2 is failure to actuate.
3,1BH receives the block signal that 11BH sends in 10 milliseconds, H3 output 1.H4 still exports 0, and CKJ2 is failure to actuate.
4,1BH current element I
IEnabling signal is behind 30 millisecond time-delay, and H4 exports 1.At this moment, H3 is output as 1, and Y2 output is 0 still, and CKJ2 is failure to actuate.
3, if 11DL trips successfully, then fault current disappears.1BH current element I
IInvolution, or door H4 output 0, with door Y2 output 0, CKJ2 is failure to actuate.
4, if the 11DL malfunctioning switch trips and fails, then fault current does not disappear.The current element I of 11BH and 1BH
IStill keep starting state, or door H4 output remains 1.Behind 120 millisecond time-delay of 11BH H2 output signal in Fig. 3, Y1 output 0, BSJ lost efficacy.11BH sends block signal to network and removes information.After 1BH receives that the 11BH block signal is removed information, H3 output 0.At this moment, Y2 output 1, the CKJ2 action, the 1DL switch is by tripping.Finish the outlet breaker fail protection.
The short trouble of current quick-breaking scope is compared with the quick-break scope in limited time, and each is protected in the logic into and out of line current element I
IIAll through the t1 time-delay, the protection logic of other logical AND quick-break scopes is identical after the startup.
Two, the protection behavioural analysis during the busbar short-circuit fault
Suppose I section busbar short-circuit fault.The busbar fault electric current generally in the quick-break scope, at this moment, the fault current 1DL that only flows through.
1, as Fig. 4, during initial condition, H3 output 0, H4 output 0.Y2 output 0.CJK2 is failure to actuate.
2, the current element I of 1BH
IStartup is behind 30 millisecond time-delay, and H4 is output as 1, makes Y2 output 1.The CJK2 action, the 1DL tripping operation.Fault is cut.
Three, operational mode adapts to
The territory protection logic of standing can be adapted to the conversion of switching station operational mode.The block signal and the block switch position of outlet protection all are sent to incoming relay-protection.When section breaker at closing position, then the block signal of all outlets protection is all adopted by incoming relay-protection.When section breaker in the separating brake position, then the block signal of each section bus outlet protection is only adopted by the incoming relay-protection of bus separately.
Claims (1)
1. a distributed station domain protecting method for switching station is characterized in that, may further comprise the steps:
When the switching station outlet produces short trouble:
Short circuit current flow through fault outlet and corresponding inlet wire, both relaying protection current elements start, when outlet protective current element starts, the outlet protection sends block signal to incoming relay-protection, incoming relay-protection is received block signal, closes the tripping operation outlet, and trip signal is sent out in the outlet protection, its circuit breaker of tripping, the outlet switch trip;
Behind the outlet switch trip, the outlet protection confirms that short circuit current disappears, and removes block signal, recovers the incoming relay-protection trip avoidance function, finishes failure removal;
If the outlet malfunctioning switch, short circuit current does not disappear, and outlet is protected after time-delay 100ms confirms breaker failure,, block signal is removed in the outlet protection, and the incoming relay-protection outlet is reopened, and the tripping lead-in circuit breaker is finished breaker fail protection;
When the busbar short-circuit fault:
Outlet does not have short circuit current, incoming relay-protection tripping lead-in circuit breaker, excision fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010222562 CN101895101A (en) | 2010-07-09 | 2010-07-09 | Distributed station domain protecting method for switching station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010222562 CN101895101A (en) | 2010-07-09 | 2010-07-09 | Distributed station domain protecting method for switching station |
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| CN101895101A true CN101895101A (en) | 2010-11-24 |
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| CN 201010222562 Pending CN101895101A (en) | 2010-07-09 | 2010-07-09 | Distributed station domain protecting method for switching station |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496916A (en) * | 2011-11-30 | 2012-06-13 | 中国南方电网有限责任公司 | Switch failure protection method using electric network wide area information |
| CN102570417A (en) * | 2011-12-15 | 2012-07-11 | 河南省电力公司洛阳供电公司 | 10kV distribution network and method for quickly and selectively removing fault |
| CN106684843A (en) * | 2015-11-10 | 2017-05-17 | 中国电力科学研究院 | Method and system for protecting ring main unit of power distribution network |
| CN109449896A (en) * | 2018-11-29 | 2019-03-08 | 西安西瑞控制技术股份有限公司 | A kind of override trip prevention method of switching station |
| CN116231597A (en) * | 2023-02-24 | 2023-06-06 | 中国电建集团北京勘测设计研究院有限公司 | Method for realizing relay protection blocking and preventing relay protection from refusing |
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| JPH07115005A (en) * | 1993-10-19 | 1995-05-02 | Toshiba Corp | Lightning arrester device |
| CN1885663A (en) * | 2006-07-06 | 2006-12-27 | 郭建厂 | Surface-protection type switching station fault judging method |
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| JPH07115005A (en) * | 1993-10-19 | 1995-05-02 | Toshiba Corp | Lightning arrester device |
| CN1885663A (en) * | 2006-07-06 | 2006-12-27 | 郭建厂 | Surface-protection type switching station fault judging method |
Non-Patent Citations (3)
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| 《中国高新技术企业》 20091231 潘巧梅 开闭所进、出线电流保护时限配合的优化方案 第23页 , 第18期 2 * |
| 《电力系统保护与控制》 20100316 董张卓等 开闭所超短进出线电流保护的改进 第80-83页 第38卷, 第6期 2 * |
| 《电力系统自动化》 20001010 刘健等 配电开闭所自动化典型设计 第64-65页 , 第19期 2 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496916A (en) * | 2011-11-30 | 2012-06-13 | 中国南方电网有限责任公司 | Switch failure protection method using electric network wide area information |
| CN102496916B (en) * | 2011-11-30 | 2013-12-25 | 中国南方电网有限责任公司 | Switch failure protection method using electric network wide area information |
| CN102570417A (en) * | 2011-12-15 | 2012-07-11 | 河南省电力公司洛阳供电公司 | 10kV distribution network and method for quickly and selectively removing fault |
| CN106684843A (en) * | 2015-11-10 | 2017-05-17 | 中国电力科学研究院 | Method and system for protecting ring main unit of power distribution network |
| CN106684843B (en) * | 2015-11-10 | 2019-08-06 | 中国电力科学研究院 | A kind of power distribution network ring network cabinet guard method and system |
| CN109449896A (en) * | 2018-11-29 | 2019-03-08 | 西安西瑞控制技术股份有限公司 | A kind of override trip prevention method of switching station |
| CN116231597A (en) * | 2023-02-24 | 2023-06-06 | 中国电建集团北京勘测设计研究院有限公司 | Method for realizing relay protection blocking and preventing relay protection from refusing |
| CN116231597B (en) * | 2023-02-24 | 2023-08-22 | 中国电建集团北京勘测设计研究院有限公司 | Method for realizing relay protection blocking and preventing relay protection from refusing |
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Application publication date: 20101124 |