CN103872668B - 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
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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 3/2nds mode of connection breaker in middle chained approach based on breaker auxiliary protection.
Background technology
According to the requirement to interlocked control under current conversion station alternating-current field " breaker in middle " exceptional operating conditions for the power system, no matter whole
, if two sides switch off on the string becoming with the change of current, the change of current and straightens tape splicing wave filter or alternating current circuit in stream side inverter side
Situation, should the corresponding one pole of locking direct current immediately, if the direct band filter of circuit, disconnect breaker in middle.
This logic is realized in 330kv Exchange Station control system at present, is primarily present problems with.1st, when arbitrary interval bus
During side switch maintenance it may appear that q2, q3 band circuit and wave filter group operations, q2, q3 band circuit and the pole change of current change operation, q2,
Q3 band filter and the pole change of current become the operating mode run.If now q3 is due to breaker in middle chain logic needs after the tripping operation of fault three-phase
Tripping breaker in middle q2, prevent breaker in middle band single line and big group alternating current filter device, breaker in middle band change of current change and single line,
Breaker in middle becomes with the change of current and the big operating condition organizing alternating current filter.Q3 is there is to the operating mode of three jumps, current breaker in middle is chain
Logic meets condition；If q3 link, when circuit transient fault it may appear that the situation of q3 single-hop substance, now, by
In q3, three-phase separate position does not occur, so the chain logic of breaker in middle is unsatisfactory for condition, for this operating mode, current solution is: side
During switch maintenance, breaker in middle reclosing is returned by operations staff.2nd, when there is bus-bar fault, bus protection action tripping side switchs
Operating mode under, if now again there is line fault, route protection single-hop substance, wave filter or transverter can be impacted,
Existing breaker in middle is chain to be logically present dead band.Q1 stops transport, and q2, q3 operating condition with pole 2 change of current change and circuit, if q3 steals
Jump single-phase, the power part that transverter needs powers (non-jump phase) by our station.And another part passes through the line of jump phase
Road powers, and because transverter absorbed power is big, the circuit instantaneous overload of jump phase can be led to cause system oscillation.In this operation
Under operating mode, need tripping breaker in middle.According to the chain logic of breaker in middle, now it is unsatisfactory for the chain logic of breaker in middle.
The chain logic of breaker in middle realized in 330kv Exchange Station control system, and is kept apart breaker using secondary cable
Off position delivers to collection in worksite device, then through bus deliver to 330kv Exchange Station control system be analyzed with logic judgment after, then
Through bus, trip signal is dealt into collection in worksite device.So once collection, analysis, execution after the completion of increased prolonging of action
When, simultaneously because the when fieldbus that signal is walked, it is understood that there may be data congestion, error code equivalent risk, action delay increases further,
There is also the risk of tripping simultaneously.In addition the chain logic of breaker in middle realized in 330kv Exchange Station control system, only with breaker
Or disconnecting switch is that auxiliary contact position carries out logic judgment, the secondary cable loop being in highfield is highly prone to outside dry
Disturb, if be not added with other additional criteria being differentiated there is the risk of malfunction.
Content of the invention
It is an object of the invention to provide a kind of simple and reliable, realize easily based on breaker auxiliary protection 3/2nds
Mode of connection breaker in middle chained approach.
A kind of 3/2nds mode of connection breaker in middle chained approach based on breaker auxiliary protection, its special feature exists
In comprising the steps:
(1) q1 breaker auxiliary protection screen collection a, b, c three-phase simulation amount and position signalling, specifically detection a phase no flow,
A phase jumps position, b phase no flows, b phase jumps position, c phase no flows the status information jumping position with c phase, and the particular state detecting is used respectively
Logic 1 and logical zero represent, then a phase no flows the status information jumping position with a phase and obtains patrolling in the middle of first through logic and operation
Volume value, b phase no flow with b phase jump position status information obtain the second intermediate logic values through logic and operation, c phase is no flowed with
The status information that c phase jumps position obtains the 3rd intermediate logic values through logic and operation, then by the middle of the first intermediate logic values, second
Logical value and the 3rd intermediate logic values carry out logic or computing obtains the first final logical value；
(2) q3 breaker auxiliary protection screen collection a, b, c three-phase simulation amount and position signalling, specifically detection a phase no flow,
A phase jumps position, b phase no flows, b phase jumps position, c phase no flows the status information jumping position with c phase, and the particular state detecting is used respectively
Logic 1 and logical zero represent, then a phase no flows the status information jumping position with a phase and obtains patrolling in the middle of the 4th through logic and operation
Volume value, b phase no flow with b phase jump position status information obtain the 5th intermediate logic values through logic and operation, c phase is no flowed with
The status information that c phase jumps position obtains the 6th intermediate logic values through logic and operation, then by the middle of the 4th intermediate logic values, the 5th
Logical value and the 6th intermediate logic values carry out logic or computing obtains the second final logical value；
(3) q1 breaker auxiliary protection screen gathers the status information of q3 overhaul of line breaker pressing plate, and concrete by detect
State is represented with logic 1 and logical zero respectively, then carries out the second final logical value that this status information is obtained with step (2)
Or computing obtains the 3rd final logical value, the first final logical value of finally the 3rd final logical value and step (1) being obtained
Carry out logic and operation, tripping breaker in middle q2 is determined whether according to this operation result；
(4) q3 breaker auxiliary protection screen gathers the status information of q1 overhaul of line breaker pressing plate, and concrete by detect
State is represented with logic 1 and logical zero respectively, then carries out the first final logical value that this status information is obtained with step (1)
Or computing obtains the 4th final logical value, the second final logical value of finally the 4th final logical value and step (2) being obtained
Carry out logic and operation, tripping breaker in middle q2 is determined whether according to this operation result.
The first intermediate logic values in step (1), the second intermediate logic values and the 3rd intermediate logic values carry out logic or
Delay process is first passed through before computing；The 4th intermediate logic values in step (2), the 5th intermediate logic values and the 6th intermediate logic
Value first passed through delay process before carrying out logic or computing.
Technical scheme adopts a kind of new breaker in middle chained approach, by breaker auxiliary protection device, profit
The switching value being collected with breaker auxiliary protection device and analog quantity information carry out chain logic judgment, its advantage bag
Include: a, using the electric current having collected on breaker auxiliary protection screen, and circuit-breaker switching on-off position quantity, chain to breaker in middle patrol
Collect and judged, be not required in addition increase harvester；The chain logic of b, this breaker in middle is comprehensively carried out using analog quantity and switching value
Logic judgment, can effectively reduce the probability of breaker malfunction.C, the difference according to the primary system method of operation, can automatically adapt to be
The various methods of operation of uniting are it is ensured that adaptability under the conditions of any method of operation of system for the chain logic of breaker in middle.D, solution are existing
The chain dead band being logically present of breaker in middle.E, there is not data congestion, error code equivalent risk, action delay is little, the risk of tripping
Minimum.The logic of the inventive method is simple and reliable, and it is convenient to realize, and is particularly suitable for current conversion station and the big power station of operation.
Brief description
The primary system main wiring diagram that accompanying drawing 1 is applied by the present invention；
Accompanying drawing 2 be the present invention logic theory block diagram, in figure include with door y1 and door y2 and door y3, delayer t1, prolong
When device t2, delayer t3, OR gate y4, OR gate y5 and door y6；
Accompanying drawing 3 is the field connection figure of the present invention.
Specific embodiment
As shown in Figure 1, 2, 3, the present invention is a kind of chain logic of breaker in middle realized based on breaker auxiliary protection.
1st, when the normal operation of side switch, if after identifying that this switch meets arbitrary phase tripping, time delay 20ms exports
Two pairs connection jump allow to output contact, be connected to another side switch connection jump allow to open into.
2nd, when side switch maintenance, the hard pressing plate of permission jumped by the connection that need to put into another side switch.
3rd, when side switch is in stand-by state, the hard pressing plate of permission jumped by the connection that need to put into another side switch.
Connection is jumped breaker in middle outlet logic and is illustrated:
1st, connection is jumped the chain logic of breaker in middle and is adopted analog quantity Starting mode.
2nd, after side switch meets arbitrary phase tripping 20ms, and there have connection jump to allow out to be fashionable, then the protection of connection jump breaker in middle is dynamic
(jumping fixing 40ms of order) for export, and export two pairs of contacts goes breaker in middle control box to jump breaker in middle.
Logic judgment principle illustrated below:
1st, q1(side breaker auxiliary protection screen) a, b, c three-phase simulation amount collecting and position signalling are carried out according to device
Or exported after logic judgment.If q1 at least, at open position (such as a phase is in open position), now meets a
Xiang Wuliu and a phase jumps position and logical condition, has output with door y1, jumps to a phase of OR gate y4 input switch q1 after t1 time delay t
ON signal, has had one to meet condition with two input signals of door y6, as long as q3 maintenance or q3 at least have mutually jumped
Under conditions of opening, meet condition with door y6, directly remove tripping breaker in middle q2.
2nd, q3(side breaker auxiliary protection screen) a, b, c three-phase simulation amount collecting and position signalling are carried out according to device
Or exported after logic judgment.If q3 at least, at open position (such as a phase is in open position), now meets a
Xiang Wuliu and a phase jumps position and logical condition, has output with door y1, jumps to a phase of OR gate y4 input switch q1 after t1 time delay t
ON signal, has had one to meet condition with two input signals of door y6, as long as q1 maintenance or q1 at least have mutually jumped
Under conditions of opening, meet condition with door y6, directly remove tripping breaker in middle q2.
Fault case:
After the 330kv mother's side switch q1 switch being connected with pole 2 change of current change is due to maintenance or the disconnection of certain reason, meeting
Q2, q3 switch band pole 2 change of current change and river Jiang's line operating condition occur.If now there is single-phase earthing event in river Jiang line circuit
Barrier (sets c phase and earth fault occurs), and route protection action q2, q3 switch single-hop, and now q1 meets q1 extremely in three-phase open position
Rare one in open position condition, and q3c phase, in open position, also meets q3 at least in open position, so q2
By tripping.Breaker reclosure time side switch q3 is to overlap after 0.6 second, and breaker in middle q2 reclosure time is adjusted as after 1.0 seconds
Overlap, so within the 1.0 second time after breaker in middle tripping, the change of current becomes open-phase operation, according to the work(of the chain logic of breaker in middle
Can, now need tripping breaker in middle q2, this logic energy correct operation tripping breaker in middle q2 is it is ensured that the stable operation of system.
Claims (2)
1. a kind of 3/2nds mode of connection breaker in middle chained approach based on breaker auxiliary protection are it is characterised in that include
Following steps:
(1) q1 breaker auxiliary protection screen collection a, b, c three-phase simulation amount and position signalling, specifically detection a phase no flow, a phase
Jump position, b phase no flows, b phase jumps position, c phase no flows the status information jumping position with c phase, and by the particular state detecting respectively with patrolling
Volume 1 and logical zero represent, then a phase is no flowed and obtains the first intermediate logic with the status information of a phase jump position through logic and operation
Value, b phase is no flowed the status information jumping position with b phase and obtains the second intermediate logic values through logic and operation, c phase is no flowed and c
The status information mutually jumping position obtains the 3rd intermediate logic values through logic and operation, then by the middle of the first intermediate logic values, second
Logical value and the 3rd intermediate logic values carry out logic or computing obtains the first final logical value；
(2) q3 breaker auxiliary protection screen collection a, b, c three-phase simulation amount and position signalling, specifically detection a phase no flow, a phase
Jump position, b phase no flows, b phase jumps position, c phase no flows the status information jumping position with c phase, and by the particular state detecting respectively with patrolling
Volume 1 and logical zero represent, then a phase is no flowed and obtains the 4th intermediate logic with the status information of a phase jump position through logic and operation
Value, b phase is no flowed the status information jumping position with b phase and obtains the 5th intermediate logic values through logic and operation, c phase is no flowed and c
The status information mutually jumping position obtains the 6th intermediate logic values through logic and operation, then by the middle of the 4th intermediate logic values, the 5th
Logical value and the 6th intermediate logic values carry out logic or computing obtains the second final logical value；
(3) q1 breaker auxiliary protection screen gathers the status information of q3 overhaul of line breaker pressing plate, and by the particular state detecting
Represented with logic 1 and logical zero respectively, the second final logical value then obtaining this status information and step (2) carries out or transports
Calculation obtains the 3rd final logical value, finally carries out the first final logical value that the 3rd final logical value is obtained with step (1)
Logic and operation, determines whether tripping breaker in middle q2 according to this operation result；
(4) q3 breaker auxiliary protection screen gathers the status information of q1 overhaul of line breaker pressing plate, and by the particular state detecting
Represented with logic 1 and logical zero respectively, the first final logical value then obtaining this status information and step (1) carries out or transports
Calculation obtains the 4th final logical value, finally carries out the second final logical value that the 4th final logical value is obtained with step (2)
Logic and operation, determines whether tripping breaker in middle q2 according to this operation result.
2. 3/2nds mode of connection breaker in middle chained approach based on breaker auxiliary protection as claimed in claim 1, its
Be characterised by: the first intermediate logic values in step (1), the second intermediate logic values and the 3rd intermediate logic values carry out logic or
Delay process is first passed through before computing；The 4th intermediate logic values in step (2), the 5th intermediate logic values and the 6th intermediate logic
Value first passed through delay process before carrying out logic or computing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410130969.0A CN103872668B (en) | 2014-04-02 | 2014-04-02 | Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410130969.0A CN103872668B (en) | 2014-04-02 | 2014-04-02 | Middle switch interlocking method in three-seconds wiring mode based on breaker auxiliary protection |
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| CN103872668A CN103872668A (en) | 2014-06-18 |
| CN103872668B true CN103872668B (en) | 2017-01-18 |
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| 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 |
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 |
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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 |
|---|
| 3/2接线方式自适应线路保护策略设计方案;刘革明;《电力系统自动化》;20121125;第36卷(第22期);第141-144页 * |
| 浅析500kV系统中3/2接线方式线路重合闸;路改强;《电力系统保护与控制》;20091201;第37卷(第23期);第104-107页 * |
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