CN103872668A - Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection - Google Patents
Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection Download PDFInfo
- Publication number
- CN103872668A CN103872668A CN201410130969.0A CN201410130969A CN103872668A CN 103872668 A CN103872668 A CN 103872668A CN 201410130969 A CN201410130969 A CN 201410130969A CN 103872668 A CN103872668 A CN 103872668A
- Authority
- CN
- China
- Prior art keywords
- mutually
- logic
- state information
- value
- auxiliary protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Keying Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a middle switch interlocking method in a three-seconds wiring mode based on breaker auxiliary protection. The middle switch interlocking method is characterized by comprising the following steps that a Q1 breaker auxiliary protection screen collects the analog quantities and position signals of a phase A, a phase B and a phase C, A-phase current-free state information, A-phase skipping state information, B-phase current-free state information, B-phase skipping state information, C-phase current-free state information and C-phase skipping state information are specially detected, and the detected specific states are expressed through logic 1 and logic 0. According to the technical scheme, the novel middle switch interlocking method is adopted, the breaker auxiliary protection device is used for assistance, interlocking logic judgment is carried out through switching value and analog quantity information collected by the breaker auxiliary protection device, and the method is simple and reliable in logic, convenient to implement and especially suitable for running convertor stations and large power stations.
Description
Technical field
The present invention relates to a kind of chain method of switch in 3/2nds modes of connection based on circuit breaker auxiliary protection.
Background technology
Requirement according to electric power system to interlocked control under current conversion station alternating-current field " middle switch " exceptional operating conditions, no matter rectification side inversion side, if dual-side switch disconnects on the string becoming with the change of current, occur that the change of current straightens the situation of tape splicing filter or alternating current circuit, the corresponding one pole of locking direct current immediately, if the direct band filter of circuit, switch in disconnecting.
This logic realizes in 330kV Exchange Station control system at present, mainly has following problem.1,, when arbitrary interval is when bus side switch maintenance, there will be Q2, Q3 to become operation, Q2, Q3 band filter and the utmost point change of current and become the operating mode of operation with circuit and the utmost point change of current with circuit and bank of filters operation, Q2, Q3.If now Q3 is because the chain logic of switch in after fault three-phase tripping operation needs switch Q2 in tripping, prevent middle switch band single line and large group alternating current filter device, middle switch band change of current change and single line, the middle switch band change of current and become and organize greatly the operating condition of alternating current filter.Occur three operating modes of jumping for Q3, the at present middle chain logic of switch satisfies condition; If Q3 link, when transient fault appears in circuit, there will be the situation of Q3 single-hop substance, now, because three-phase separate position does not appear in Q3, so the chain logic of middle switch does not satisfy condition, for this operating mode, solution is at present: when the switch maintenance of limit, return middle switch reclosures by operations staff.2, when busbar fault occurs, under the operating mode of bus protection action tripping limit switch, if now there is again line fault, route protection single-hop substance, can impact filter or converter, and the chain logic of existing middle switch exists dead band.Q1 stops transport, Q2, the Q3 operating condition with the utmost point 2 change of current changes and circuit, if Q3 jump is single-phase, the power part that converter needs is by our station power (non-jump phase).And another part is by the line powering of jump phase, because converter absorbed power is large, can cause the circuit instantaneous overload of jump phase to cause system oscillation.Under this operating condition, need switch in tripping.According to the chain logic of middle switch, the chain logic of switch in now not meeting.
The chain logic of middle switch realizing in 330kV Exchange Station control system, adopt secondary cable that circuit breaker and isolating switch position are delivered to collection in worksite device, then through bus deliver to that control system in 330kV Exchange Station is analyzed and logic judgement after, then through bus, trip signal is dealt into collection in worksite device.So once gather, analysis, the complete rear time delay that has increased action,, may there is data congestion, error code equivalent risk in the time fieldbus of simultaneously walking due to signal, action delay further strengthens, and also has the risk of tripping simultaneously.The chain logic of middle switch realizing in 330kV Exchange Station control system in addition, only adopting circuit breaker or isolating switch is that logic judgement is carried out in auxiliary contact position, secondary cable loop in highfield is very easily subject to external disturbance, differentiate if do not add other additional criteria, have the risk of malfunction.
Summary of the invention
The object of this invention is to provide a kind of simple and reliable, realize the chain method of switch in 3/2nds modes of connection based on circuit breaker auxiliary protection easily.
The chain method of switch in 3/2nds modes of connection based on circuit breaker auxiliary protection, its special feature is, comprises the steps:
(1) Q1 circuit breaker auxiliary protection screen gathers A, B, C three-phase simulation amount and position signalling, specifically detect A mutually without stream, A jumps position mutually, B is mutually without stream, B jumps position mutually, C is mutually without flowing the state information of jumping mutually position with C, and the concrete state detecting is represented with logical one and logical zero respectively, then A is obtained to first intermediate logic value with the state information that A jumps position mutually through logic and operation without stream mutually, B is obtained to second intermediate logic value with the state information that B jumps position mutually through logic and operation without stream mutually, C is obtained to three intermediate logic value with the state information that C jumps position mutually through logic and operation without stream mutually, again by the first intermediate logic value, the second intermediate logic value and the 3rd intermediate logic value are carried out logic OR computing and are obtained the first final logical value,
(2) Q3 circuit breaker auxiliary protection screen gathers A, B, C three-phase simulation amount and position signalling, specifically detect A mutually without stream, A jumps position mutually, B is mutually without stream, B jumps position mutually, C is mutually without flowing the state information of jumping mutually position with C, and the concrete state detecting is represented with logical one and logical zero respectively, then A is obtained to four intermediate logic value with the state information that A jumps position mutually through logic and operation without stream mutually, B is obtained to five intermediate logic value with the state information that B jumps position mutually through logic and operation without stream mutually, C is obtained to six intermediate logic value with the state information that C jumps position mutually through logic and operation without stream mutually, again by the 4th intermediate logic value, the 5th intermediate logic value and the 6th intermediate logic value are carried out logic OR computing and are obtained the second final logical value,
(3) Q1 circuit breaker auxiliary protection screen gathers the state information of Q3 overhaul of line breaker pressing plate, and the concrete state detecting is represented with logical one and logical zero respectively, then the second final logical value this state information and step (2) being obtained is carried out exclusive disjunction and is obtained the 3rd final logical value, the the first final logical value finally the 3rd final logical value and step (1) being obtained is carried out logic and operation, determines whether switch Q2 in tripping according to this operation result;
(4) Q3 circuit breaker auxiliary protection screen gathers the state information of Q1 overhaul of line breaker pressing plate; and the concrete state detecting is represented with logical one and logical zero respectively; then the first final logical value this state information and step (1) being obtained is carried out exclusive disjunction and is obtained the 4th final logical value; the the second final logical value finally the 4th final logical value and step (2) being obtained is carried out logic and operation, determines whether switch Q2 in tripping according to this operation result.
The first intermediate logic value, the second intermediate logic value and the 3rd intermediate logic value in step (1) were first passed through delay process before carrying out logic OR computing; The 4th intermediate logic value, the 5th intermediate logic value and the 6th intermediate logic value in step (2) were first passed through delay process before carrying out logic OR computing.
Technical scheme of the present invention adopts a kind of new chain method of middle switch, by circuit breaker auxiliary protection device, utilize switching value and the analog quantity information that circuit breaker auxiliary protection device collects to carry out chain logic judgement, its beneficial effect comprises: a, utilize the electric current having collected on circuit breaker auxiliary protection screen, with circuit-breaker switching on-off position quantity, the chain logic of centering switch judges, does not need to increase in addition harvester; In b, basis, the chain logic of switch adopts analog quantity and switching value comprehensively to carry out logic judgement, can effectively reduce the probability of circuit breaker malfunction.C, according to the difference of primary system operational mode, the automatically various operational modes of adaptive system, the adaptability of the chain logic of switch under any operational mode condition of system in assurance.D, solve the dead band that the chain logic of existing middle switch exists.E, do not have data congestion, error code equivalent risk, action delay is little, and the risk of tripping is minimum.The logic of the inventive method is simple and reliable, and it is convenient to realize, the current conversion station that is particularly suitable for having moved and big power station.
Accompanying drawing explanation
Accompanying drawing 1 is the applied primary system main wiring diagram of the present invention;
Accompanying drawing 2 is logic theory block diagram of the present invention, figure comprise with door Y1, with a door Y2, with door Y3, a delayer T1, delayer T2, delayer T3 or door Y4 or door Y5, with a door Y6;
Accompanying drawing 3 is field connection figure of the present invention.
Embodiment
As shown in Figure 1, 2, 3, the present invention is a kind of chain logic of middle switch realizing based on circuit breaker auxiliary protection.
1, in the time that limit switch normally moves, meet after arbitrary phase tripping if identify this switch, two pairs of connection of time delay 20ms output are jumped and are allowed to output contact, the connection that is connected to another side switch jump allow to open into.
2,, in the time of the switch maintenance of limit, need the connection that drops into another side switch to jump the hard pressing plate of permission.
3,, when limit switch is during in stand-by state, the connection that needs to drop into another side switch is jumped and is allowed hard pressing plate.
Switch outlet logic explanation in connection jumping:
1, in connection jumping, the chain logic of switch adopts analog quantity Starting mode.
2, when limit switch meets after arbitrary phase tripping 20ms, and there have the jumping of connection to allow out to be fashionable, and in connection jumping, switch protection action exports (jumping order is fixed and sent out a 40ms), and export two pairs of contacts and remove switch in middle switch operating case jumping.
Below illustrate logic and judge principle:
1, Q1(limit circuit breaker auxiliary protection screen) A, the B, C three-phase simulation amount and the position signalling that collect according to device carry out or logic judges laggard line output.If Q1 for example has one at least, at open position (A is at open position), now meet A and jump mutually position and logical condition without stream with A mutually, Y1 has output with door, the A phase tripping signal of or door Y4 input switch Q1 backward through T1 time delay T, there is one to satisfy condition with two input signals of door Y6, as long as Q3 maintenance or Q3 have at least under the condition of tripping of phase, Y6 satisfies condition with door, directly removes switch Q2 in tripping.
2, Q3(limit circuit breaker auxiliary protection screen) A, the B, C three-phase simulation amount and the position signalling that collect according to device carry out or logic judges laggard line output.If Q3 for example has one at least, at open position (A is at open position), now meet A and jump mutually position and logical condition without stream with A mutually, Y1 has output with door, the A phase tripping signal of or door Y4 input switch Q1 backward through T1 time delay T, there is one to satisfy condition with two input signals of door Y6, as long as Q1 maintenance or Q1 have at least under the condition of tripping of phase, Y6 satisfies condition with door, directly removes switch Q2 in tripping.
Fault case:
After the female side switch of the 330kV I in a disguised form connecting with the utmost point 2 changes of current Q1 switch disconnects due to maintenance or certain reason, there will be Q2,2 change of current changes of the Q3 switch band utmost point and river Jiang's II line operating condition.If now river Jiang III line circuit generation single phase ground fault (establish C earth fault occurs mutually); route protection action Q2, Q3 switch single-hop; now Q1 meets Q1 at three-phase separate gate position and has one at least in open position condition; and Q3C is at open position; also meet Q3 and have one at least at open position, so Q2 is by tripping.Circuit breaker reclosure time limit switch Q3 overlaps for 0.6 second afterwards, it is to overlap afterwards for 1.0 seconds that middle switch Q2 reclosure time is adjusted, so the change of current becomes open-phase operation in the 1.0 second time after middle switch tripping, according to the function of the chain logic of middle switch, now need switch Q2 in tripping, switch Q2 in this logic energy correct operation tripping, has guaranteed the stable operation of system.
Claims (2)
1. the chain method of switch in 3/2nds modes of connection based on circuit breaker auxiliary protection, is characterized in that, comprises the steps:
(1) Q1 circuit breaker auxiliary protection screen gathers A, B, C three-phase simulation amount and position signalling, specifically detect A mutually without stream, A jumps position mutually, B is mutually without stream, B jumps position mutually, C is mutually without flowing the state information of jumping mutually position with C, and the concrete state detecting is represented with logical one and logical zero respectively, then A is obtained to first intermediate logic value with the state information that A jumps position mutually through logic and operation without stream mutually, B is obtained to second intermediate logic value with the state information that B jumps position mutually through logic and operation without stream mutually, C is obtained to three intermediate logic value with the state information that C jumps position mutually through logic and operation without stream mutually, again by the first intermediate logic value, the second intermediate logic value and the 3rd intermediate logic value are carried out logic OR computing and are obtained the first final logical value,
(2) Q3 circuit breaker auxiliary protection screen gathers A, B, C three-phase simulation amount and position signalling, specifically detect A mutually without stream, A jumps position mutually, B is mutually without stream, B jumps position mutually, C is mutually without flowing the state information of jumping mutually position with C, and the concrete state detecting is represented with logical one and logical zero respectively, then A is obtained to four intermediate logic value with the state information that A jumps position mutually through logic and operation without stream mutually, B is obtained to five intermediate logic value with the state information that B jumps position mutually through logic and operation without stream mutually, C is obtained to six intermediate logic value with the state information that C jumps position mutually through logic and operation without stream mutually, again by the 4th intermediate logic value, the 5th intermediate logic value and the 6th intermediate logic value are carried out logic OR computing and are obtained the second final logical value,
(3) Q1 circuit breaker auxiliary protection screen gathers the state information of Q3 overhaul of line breaker pressing plate, and the concrete state detecting is represented with logical one and logical zero respectively, then the second final logical value this state information and step (2) being obtained is carried out exclusive disjunction and is obtained the 3rd final logical value, the the first final logical value finally the 3rd final logical value and step (1) being obtained is carried out logic and operation, determines whether switch Q2 in tripping according to this operation result;
(4) Q3 circuit breaker auxiliary protection screen gathers the state information of Q1 overhaul of line breaker pressing plate; and the concrete state detecting is represented with logical one and logical zero respectively; then the first final logical value this state information and step (1) being obtained is carried out exclusive disjunction and is obtained the 4th final logical value; the the second final logical value finally the 4th final logical value and step (2) being obtained is carried out logic and operation, determines whether switch Q2 in tripping according to this operation result.
2. the chain method of switch in 3/2nds modes of connection based on circuit breaker auxiliary protection as claimed in claim 1, is characterized in that: the first intermediate logic value, the second intermediate logic value and the 3rd intermediate logic value in step (1) were first passed through delay process before carrying out logic OR computing; The 4th intermediate logic value, the 5th intermediate logic value and the 6th intermediate logic value in step (2) were first passed through delay process before carrying out logic OR computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130969.0A CN103872668B (en) | 2014-04-02 | 2014-04-02 | Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130969.0A CN103872668B (en) | 2014-04-02 | 2014-04-02 | Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103872668A true CN103872668A (en) | 2014-06-18 |
| CN103872668B CN103872668B (en) | 2017-01-18 |
Family
ID=50910929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410130969.0A Active CN103872668B (en) | 2014-04-02 | 2014-04-02 | Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103872668B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576624A (en) * | 2016-02-02 | 2016-05-11 | 国家电网公司 | Realization method of switch interlocking logic in alternating current field of convertor station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185278A (en) * | 2011-05-03 | 2011-09-14 | 中国电力工程顾问集团中南电力设计院 | Extra-high-voltage direct-current power transmission converter station protecting method |
| CN102611082A (en) * | 2011-11-29 | 2012-07-25 | 陕西电力科学研究院 | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network |
-
2014
- 2014-04-02 CN CN201410130969.0A patent/CN103872668B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185278A (en) * | 2011-05-03 | 2011-09-14 | 中国电力工程顾问集团中南电力设计院 | Extra-high-voltage direct-current power transmission converter station protecting method |
| CN102611082A (en) * | 2011-11-29 | 2012-07-25 | 陕西电力科学研究院 | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network |
Non-Patent Citations (2)
| Title |
|---|
| 刘革明: "3/2接线方式自适应线路保护策略设计方案", 《电力系统自动化》, vol. 36, no. 22, 25 November 2012 (2012-11-25) * |
| 路改强: "浅析500kV系统中3/2接线方式线路重合闸", 《电力系统保护与控制》, vol. 37, no. 23, 1 December 2009 (2009-12-01) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576624A (en) * | 2016-02-02 | 2016-05-11 | 国家电网公司 | Realization method of switch interlocking logic in alternating current field of convertor station |
| CN105576624B (en) * | 2016-02-02 | 2019-07-12 | 国家电网公司 | The implementation method of switch interlock logic in converter station alternating-current field |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103872668B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tumilty et al. | Approaches to network protection for inverter dominated electrical distribution systems | |
| Choudhary et al. | A review on microgrid protection | |
| CN107093890A (en) | A kind of flexible direct current converter station internal fault switchgear distribution and sweep-out method | |
| CN101917064B (en) | Back-up protection processing method of digital substation transformer based on GOOSE mode | |
| CN102611082B (en) | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network | |
| CN106159913B (en) | Multi-terminal flexible direct current system direct current fault protecting method | |
| CN103354353A (en) | Intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method | |
| CN101872964A (en) | Wide area measurement system based back-up protection method of multi-terminal high-voltage power transmission area | |
| CN105006810A (en) | Fault processing method of neutral-point non-effective grounding system and corresponding processing system | |
| CN104485736A (en) | Intelligent protection center-based wide-area backup protection system and method | |
| CN103280776B (en) | A kind of method preventing differential protection incorrect operation | |
| CN103166203A (en) | Distribution network topology guard method with direction | |
| CN104253421B (en) | A kind of common-tower double-circuit lines relay protection Optimal Configuration Method shared based on station domain information | |
| CN112582987A (en) | Intelligent distributed feeder fault judgment and positioning method for distribution network | |
| CN105356430B (en) | Active closed loop power distribution network protection system and method | |
| Liu et al. | Protection of microgrids with high amounts of renewables: Challenges and solutions | |
| CN106505529A (en) | A kind of intelligent substation low-voltage bus bar guard method | |
| CN105024356A (en) | Ratio braking type protection method for bus with voltage class of 35 kV or below | |
| CN103390881A (en) | Intelligent protection circuit and method of unified power quality conditioner | |
| CN203014357U (en) | GOOSE message/switch value conversion device for relay protection digitized transformation | |
| CN101958579A (en) | Method of treating information loss in centralized protection device of digitalized substation | |
| CN103872668B (en) | Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection | |
| CN103779847B (en) | Based on the guard method of SV network samples common-tower double-circuit lines single-phase earthing voltage ratio phase | |
| CN104319734A (en) | Large difference protection method based on second harmonic excitation surge current of converter transformer | |
| CN103746354B (en) | One kind is based on transformer station's overcurrent protection method for isolating power distribution network fault without constant time lag in |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |