CN108988304A - A kind of power grid access defence method of magnetic circuit control type fault current limiter - Google Patents
A kind of power grid access defence method of magnetic circuit control type fault current limiter Download PDFInfo
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- CN108988304A CN108988304A CN201810818847.9A CN201810818847A CN108988304A CN 108988304 A CN108988304 A CN 108988304A CN 201810818847 A CN201810818847 A CN 201810818847A CN 108988304 A CN108988304 A CN 108988304A
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- current limiter
- fault current
- magnetic circuit
- control type
- signal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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Abstract
The invention discloses a kind of power grids of magnetic circuit control type fault current limiter to access defence method; it is defendd including-urgent-three layers of power grid on the spot; defending in place passes through config failure current limiter protective device; after ensuring that magnetic circuit control type fault current limiter breaks down, protection equipment can cut off failure by the isolated fault of bypass breaker combined floodgate or line-breaker tripping；Urgent defence refers to that line protective devices and safety and stability control device according to fault current limiter state switchover operation definite value and operation criterion, guarantee power grid control measure not mismatch；Fault current limiter status information is sent to D5000 system simultaneously by fault current limiter protective device, and dispatching of power netwoks operations staff forms power grid defence according to anticipation Developing Tactics grid operation mode, guarantees power grid security reliability service after route excision.The present invention improves the adaptability of power grid control measure after fault current limiter equipment fault, further supports the practical bulk power grid application of magnetic circuit control type fault current limiter.
Description
Technical field
The present invention relates to a kind of power grids of magnetic circuit control type fault current limiter to access defence method, and it is automatic to belong to electric system
Change control technology field.
Background technique
With the continuous development of extra-high voltage alternating current-direct current power grid, electric system grid structure tends to complicate.Power grid installation is held
Amount gradually increases and transregional interconnected network transmission power is continuously increased, and system short circuit currents constantly rise, and breaker actuation is abundant
Degree constantly reduces, and some areas short circuit current is even more than circuit breaker interrupting capacity, it is most likely that causing can not after electric network fault
Isolated fault causes accident range to expand and threatens power network safety operation, it is therefore necessary to which adopting an effective measure reduces short-circuit electricity
Stream.
Traditional grid short circuit current limit technology, which mainly has, to be promoted voltage class, power system delamination and subarea operation, changes system
The method of operation of uniting improves electric network impedance and replacement highly resistance equipment or high rupturing capacity breaker.The fault current of these passive-types limits
Measure processed increases system operation impedance or destroys electric network composition, wants in the constraint of alternating current-direct current electricity net safety stable to operation of power networks
It asks under the status constantly enhanced, the electric network fault Current limited measures applicability of passive-type is poor, increases system operation cost, more
It is not able to satisfy actual motion requirement, there is an urgent need to new electric network fault Current limited measures and means, can be effectively reduced
Short circuit current is simultaneously reduced on power grid security and stability influence.
Magnetic circuit control type fault current limiter (hereinafter referred to as fault current limiter) fast response time only moves during electric network fault
Make, relay protection and safety and stability are influenced smaller, is theoretically more accurately current limiting measures at present.Some scholars are to failure
Influence of the current limiter to power grid security and stability, relay protection influence etc. to be studied.But at present to fault current limiter
Reliability understanding is insufficient, how to defend after exception and influence understanding to power network safety operation is unclear, limits bulk power grid
Practical application.Therefore, it is the practical application of puopulsion equipment, studies the reliability and abnormal defensive measure of fault current limiter, be
It is highly beneficial and very necessary.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of access of the power grid of magnetic circuit control type fault current limiter is anti-
Imperial system.On the basis of fault current limiter fail-safe analysis, according to the influence to relay protection and stability contorting, failure is limited
The abnormal conditions for flowing device are realized Observable, be can defend, and provide the foundation for practical application of the equipment in power grid.
In order to achieve the above object, the technical scheme adopted by the invention is that:
A kind of power grid access defence method of magnetic circuit control type fault current limiter, comprising the following steps:
1) config failure current limiter protective device is monitored magnetic circuit control type fault current limiter abnormality；
2) after monitoring magnetic circuit control type fault current limiter exception, defending in place is opened；The defending in place refers to, failure
Current limiter protective device is isolated by bypass breaker or cuts off magnetic circuit control type failure limit by route two sides circuit breaker trip
Flow device；
3) line protective devices carry out definite value and criterion switching, and safety and stability control device carries out action policy switching；
4) scheduling D5000 system receives fault current limiter protection act information, fault current limiter status information, bypasses and break
After road device or route two sides circuit breaker position displacement information, line protective devices and safety and stability control device handover information, sentence
Disconnected scene operation of power networks state, checks grid operation mode；According to grid operation mode check result, grasped by route
Make and Unit Combination mode adjusts, grid operation mode, trend mode are adjusted using manual type.
In aforementioned step 1), fault current limiter protective device monitors the event of magnetic circuit control type by normal cable or SV mode
Hinder current limiter two sides electric current and voltage.
In aforementioned step 2), fault current limiter protective device configures magnetic circuit control type fault current limiter differential protection, leads to
Overload protection and non-ionizing energy loss are flowed,
The differential protection judgement is as follows:
Wherein, Φ represents any one phase of A, B, C, Δ IdΦFor difference current, Δ IrΦFor stalling current, IMΦ、INΦFor magnetic circuit
Control type fault current limiter two sides electric current, IsetFor differential current threshold value；
The through-flow overload protection judgement is as follows:
Wherein, It_setFor the logical energy ability definite value of electric current, U1Survey positive sequence voltage, U2Survey negative sequence voltage, Uset1For positive sequence electricity
The normal definite value of reduce off-flavor, Uset2Negative sequence voltage exception definite value；
The non-ionizing energy loss judgement are as follows: after magnetic circuit control type fault current limiter self monitor to failure, by remote signalling side
Formula is sent to fault current limiter protective device, and fault current limiter protective device receives after failure remote signalling opens, by 3ms~
5ms deferred action, combined floodgate bypass breaker or tripping route two sides breaker.
In aforementioned step 2), if magnetic circuit control type fault current limiter configures bypass breaker, defending in place process
Are as follows:
2a-1) it is intelligent to bypass breaker to send order of closing a floodgate by GOOSE communication mode for fault current limiter protective device
Terminal installation, by breaker closing；
After 2a-2) bypass breaker receives combined floodgate order, executing agency is by breaker closing, tripping position relay
TWJ and closing operation position relay HWJ signal conjugate, and fault current limiter protective device passes through remote signalling access or intelligent terminal
GOOSE communication interface receives position and conjugates information；
2a-3) fault current limiter protective device is breaking by fault current limiter status signal, bypass by GOOSE communication mode
Device position displacement signal is sent to line protective devices and associated safety stabilization control device；
2a-4) fault current limiter protective device is by MMS communication mode by fault current limiter status signal, bypass breaker
Position displacement signal is sent to SCADA system in station, is forwarded to scheduling D5000 system by SCADA system in standing.
In aforementioned step 2), if bypass breaker, defending in place mistake is not configured in magnetic circuit control type fault current limiter
Journey are as follows:
2b-1) fault current limiter protective device sends trip signal to route two sides breaker by GOOSE communication mode
Intelligent terminal, by circuit breaker trip；
After 2b-2) route two sides breaker receives trip signal, executing agency is by circuit breaker trip, trip position relay
Device TWJ and closing operation position relay HWJ signal conjugate, and fault current limiter protective device passes through remote signalling access or intelligent terminal
GOOSE communication interface receives position and conjugates information；
2b-3) fault current limiter protective device is breaking by fault current limiter status signal, bypass by GOOSE communication mode
Device position displacement signal is sent to line protective devices and associated safety stabilization control device；
2b-4) fault current limiter protective device is by MMS communication mode by fault current limiter status signal, bypass breaker
Position displacement signal is sent to SCADA system in station, is forwarded to scheduling D5000 system by SCADA system in standing.
In aforementioned step 2), if bypass breaker refuses to close or route two sides breaker is refused to jump, actuating breaker failure protection dress
It sets, cuts off bus two sides whole wire-outgoing breaker；Then based Cb Failure Protection passes through MMS message sending action information to D5000
System.
In aforementioned step 3), if magnetic circuit control type fault current limiter configures bypass breaker,
It is true in conjunction with bypass breaker position signal after 3a-1) line protective devices receive fault current limiter status signal
After recognizing state, start definite value and operating criterion switching judging；Safety and stability control device receives fault current limiter fault-signal
Afterwards, after in conjunction with bypass breaker position signal acknowledgement state, starting operation strategy switching judging；Judge that signal is equal are as follows:
Wherein, Qd is to judge signal, and i indicates that line protective devices/safety and stability control device i-th is interrupted, TWJPi
For bypass breaker TWJ signal, HWJPiFor bypass breaker HWJ signal, STFCLiFor line protective devices line protective devices/
The status signal of the received magnetic circuit control type fault current limiter of safety and stability control device, STFCLiMagnetic circuit control type failure when being 1
Current limiter failure is abnormal when being 0；Start switching after Qd=1, otherwise keeps original customization and criterion；
3a-2) line protective devices arrive of short duration blocking device, starting after meeting definite value and operating criterion switching enabling signal
Definite value and operating criterion switching；Operating criterion is switched to the criterion without considering fault current limiter transient characterisitics, distance protection, zero
Sequence protects definite value switching not consider that magnetic circuit control type fault current limiter puts into the definite value of impedance；Safety and stability control device meets dynamic
Of short duration blocking device, the switching of starter action policy are arrived after making switchover policy enabling signal；
After the completion of 3a-3) definite value and operating criterion and action policy switch, restore to operate normally, and pass through MMS message
Definite value and operating criterion and action policy information are sent to SCADA system in station, scheduling is uploaded to by SCADA system in standing
D5000 system.
In aforementioned step 3), if bypass breaker is not configured in magnetic circuit control type fault current limiter,
3b-1) line protective devices conjugate signal after receiving fault current limiter status signal and line-breaker tripping,
Route is already cut off, and line protective devices start the judgement of route block signal；Safety and stability control device receives failure limit
After flowing device status signal, after the circuit breaker position signal acknowledgement state of combined circuit two sides, starting operation strategy switching judging；Judgement
Signal is equal are as follows:
Wherein, QdxTo judge that signal, i are the interruption of line protective devices/safety and stability control device i-th, TWJX1i、
TWJX2iFor route two sides breaker TWJ signal, HWJX1i、HWJX2iFor route two sides breaker HWJ signal, STFCLiFor route guarantor
The status information of the received magnetic circuit control type fault current limiter of protection unit/safety and stability control device, STFCLiMagnetic circuit control when being 1
Type fault current limiter failure processed is abnormal when being 0；
3b-2) line protective devices meet blocking device after route protection block signal, and safety and stability control device meets
Action policy arrives of short duration blocking device, the switching of starter action policy after switching enabling signal, and will be latched by MMS message
Information and action policy message are sent to SCADA system in station, are uploaded to scheduling D5000 system by SCADA system in standing.
In aforementioned step 4), if configuration bypass breaker, magnetic circuit control type fault current limiter function exit, again
Grid operation mode is checked；If bypass breaker is not configured, magnetic circuit control type fault current limiter is removed, simultaneously
Working line is also removed, and is checked again to grid operation mode.
The beneficial effects obtained by the present invention are as follows are as follows:
Present invention apparatus body after magnetic circuit control type fault current limiter accesses power grid breaks down, and guarantees that power network line is protected
Protection unit acts definite value and criterion carries out the switching of adaptability, reduces the probability that malfunction and misaction occur；Guarantee safety and stability control
Device strategy processed carries out the change of adaptability, reduces the probability that tactful mismatch occurs；Pass through the method for operation and trend of grid side
Mode adjusts, and improves safe operation of electric network.
The present invention improves the adaptability of power grid control measure after fault current limiter equipment fault, further supports magnetic circuit
The practical bulk power grid application of control type fault current limiter.
Detailed description of the invention
Fig. 1 is defense system framework of the invention；
Fig. 2 is the overall flow figure of the method for the present invention；
Fig. 3 is the detail flowchart of the method for the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, the power grid of magnetic circuit control type fault current limiter of the invention accesses defence method, it is anti-comprising three layers
It is imperial: including more defending in place, urgent defence and power grid defence.
Defending in place: config failure current limiter protective device carries out status monitoring to magnetic circuit control type fault current limiter, when
After fault current limiter failure, excision or isolated fault current limiter.Guarantee after magnetic circuit control type fault current limiter breaks down, energy
It is enough to be quickly detected abnormal and quickly isolate or cut off on the spot, reduce the influence of magnetic circuit control type fault current limiter.
Urgent defence: the fault current limiter status signal that real-time reception fault current limiter protective device is sent, according to failure
Current limiter state selects failure criterion and definite value；Magnetic circuit control type fault current limiter break down after by defending in place isolation or
Person's excision, line protective devices operating criterion and movement definite value need synchronous vacations, and tripping or malfunction otherwise may occur.Safety
Stabilization control device action policy needs synchronous vacations, and tactful mismatch otherwise may occur.Urgent defence passes through magnetic circuit control type
Fault current limiter abnormality and isolation, device for excising judgement, automatic modification movement definite value and operating criterion, prevent possibility
Tripping, malfunction or tactful mismatch problems.
Power grid defence: according to the received fault current limiter status signal of D5000 system, manually adjusting grid operation mode,
Ensure bulk power grid safe operation.After magnetic circuit control type fault current limiter is isolated, transient characterisitics become after grid collapses
Change, it may occur however that short circuit current excessive problem is more than circuit breaker interrupting capacity, can not cut-off failure.Therefore it needs to pass through power grid
Method of operation adjustment reduces short circuit current by modes such as Electromagnetic coupling, unit output adjustment.Magnetic circuit control type failure current limit
After device is removed, it is equivalent to line maintenance, power grid needs to carry out safety and stability verification, improves electric network security.
As shown in Figures 2 and 3, it to realize above-mentioned three layers of defence, include four step processes:
1: magnetic circuit control type fault current limiter is detected, it being capable of effectively start subsequent action after being abnormal.Specifically:
Config failure current limiter protective device is monitored magnetic circuit control type fault current limiter abnormality.Failure current limit
Device protective device monitors magnetic circuit control type failure limit by normal cable or SV (IEC-61850-9-2 specification communication protocol) mode
Flow device two sides electric current, voltage etc..
2: after magnetic circuit control type fault current limiter exception, opening defending in place, defending in place refers to, fault current limiter protection
Device passes through bypass breaker or the isolation of route two sides circuit breaker trip, excision magnetic circuit control type fault current limiter.Detailed process
It is as follows:
After fault current limiter protective device monitors magnetic circuit control type fault current limiter failure, protection act outlet, excision
Or isolation magnetic circuit control type fault current limiter.It is differential that fault current limiter protective device mainly configures magnetic circuit control type fault current limiter
Protection, through-flow overload protection and non-ionizing energy loss.
Magnetic circuit control type fault current limiter differential protection, starts differential protection after meeting following conditions:
Wherein, Φ represents any one phase of A, B, C.ΔIdΦFor difference current, Δ IrΦFor stalling current, IMΦ、INΦFor magnetic circuit
Control type fault current limiter two sides electric current, IsetFor differential current threshold value.
Through-flow overload protection:
Wherein, Φ represents any one phase of A, B, C.It_setFor the logical energy ability definite value of electric current, U1Survey positive sequence voltage, U2Actual measurement
Negative sequence voltage, Uset1For positive sequence voltage exception definite value, Uset2Negative sequence voltage exception definite value.
Non-ionizing energy loss: non-ionizing energy loss be magnetic circuit control type fault current limiter self monitor to failure after, pass through remote signalling
Mode is sent to fault current limiter protective device, and fault current limiter protective device receives after failure remote signalling opens, by 3ms~
5ms deferred action, combined floodgate bypass breaker or tripping route two sides breaker.
It whether is configured with bypass breaker for magnetic circuit control type fault current limiter, the execution of defending in place is divided into as follows
Two kinds of situations:
2a) magnetic circuit control type fault current limiter configures bypass breaker,
2a-1) fault current limiter protective device passes through GOOSE (the transformer substation case message mechanism-towards general object
Generic Object Oriented Substation Event) communication mode send close a floodgate order to bypass breaker intelligence
Terminal installation, by breaker closing.Fault current limiter protective device can also go out operate circuit outlet combined floodgate breaker by conventional.
After 2a-2) bypass breaker receives combined floodgate order, executing agency is by breaker closing, TWJ (trip position relay
Device) and HWJ (closing operation position relay) signal conjugate, fault current limiter protective device pass through remote signalling access or intelligent terminal
GOOSE communication interface receives displacement information.Fault current limiter protective device passes through GOOSE communication mode for fault current limiter state
Signal, bypass breaker position displacement signal are sent to line protective devices and associated safety stabilization control device.Failure current limit
Device protective device is breaking by fault current limiter status signal, bypass by MMS (IEC-61850 manufactures message specification) communication mode
Device position displacement signal is sent to SCADA in station (data acquisition and supervisor control-Supervisory Control And
Data Acquisition) system, being forwarded to scheduling D5000 system by SCADA system in standing, (smart grid of new generation is dispatched
Technology support system basic platform).
2b) bypass breaker is not configured in magnetic circuit control type fault current limiter,
2b-1) fault current limiter protective device sends trip signal to route two sides breaker by GOOSE communication mode
Intelligent terminal, by circuit breaker trip.
After 2b-2) route two sides breaker receives trip signal, executing agency is by circuit breaker trip, TWJ and HWJ signal
It conjugates, fault current limiter protective device receives displacement information by remote signalling access or intelligent terminal GOOSE communication interface.Therefore
Hinder current limiter protective device and fault current limiter status signal, bypass breaker position are conjugated by signal by GOOSE communication mode
It is sent to line protective devices and associated safety stabilization control device.Fault current limiter protective device will by MMS communication mode
Fault current limiter status signal, bypass breaker position displacement signal are sent to SCADA system in station, by SCADA system in standing
It is forwarded to scheduling D5000 system (smart grid supporting system technology basic platform of new generation).
During defending in place, if bypass breaker refuses to close or route two sides breaker is refused to jump, actuating breaker failure protection at this time
Device expands fault coverage, cuts off bus two sides whole wire-outgoing breaker.Based Cb Failure Protection passes through MMS message sending action
Information is to D5000 system.
3: it is dynamic to prevent line protective devices for line protective devices and the switching of safety and stability control device definite value and criterion
Make incorrect, safety and stability control device strategy mismatch.This partly belongs to promptly defend level.
Equally, whether bypass breaker is configured with according to magnetic circuit control type fault current limiter, is divided into the following two kinds situation:
3a) magnetic circuit control type fault current limiter configures bypass breaker,
It is true in conjunction with bypass breaker position signal after 3a-1) line protective devices receive fault current limiter status signal
After recognizing state, start definite value and operating criterion switching judging.Line protective devices start definite value and operating criterion switching signal are as follows:
Wherein, i indicates that the i-th of line protective devices is interrupted, TWJPiFor bypass breaker TWJ signal, HWJPiFor bypass
Breaker HWJ signal, STFCLiFor the status signal (ST of the received magnetic circuit control type fault current limiter of line protective devicesFCLiIt is 1
When magnetic circuit control type fault current limiter failure, it is abnormal when being 0).Start definite value and criterion switching signal after Qd=1, otherwise keeps
Original customization and criterion, Qd are the logic judgement modes of starting, judge coincidence, receive fault current limiter exception, judge 5
Point, conditions above start after meeting.
3a-2), line protective devices arrive of short duration blocking device, starting after meeting definite value and operating criterion switching enabling signal
Definite value and operating criterion switching.Operating criterion is switched to the criterion without considering fault current limiter transient characterisitics, distance protection, zero
Sequence protects definite value switching not consider that magnetic circuit control type fault current limiter puts into the definite value of impedance.Definite value and operating criterion switching are completed
Afterwards, restore to operate normally, and definite value and operating criterion handover information are sent to by SCADA system in station by MMS message, by standing
Interior SCADA system is uploaded to scheduling D5000 system.
After 3a-3) safety and stability control device receives fault current limiter fault-signal, believe in conjunction with bypass breaker position
After number acknowledgement state, starting operation strategy switching judging.The start-up criterion of safety and stability control device action policy switching signal
It is consistent with line protective devices.
Of short duration blocking device, starting dress 3a-4) are arrived after safety and stability control device satisfaction movement switchover policy enabling signal
Set action policy switching.Safety and stability control device, which will act, to be sent in switchover policy information to scheduling D5000 system.
3b) bypass breaker is not configured in magnetic circuit control type fault current limiter,
3b-1) line protective devices conjugate signal after receiving fault current limiter status signal and line-breaker tripping,
Route is already cut off, line protective devices starter block signal.Start block signal criterion are as follows:
Wherein, i is that the i-th of line protective devices is interrupted, TWJX1i、TWJX2iFor route two sides breaker TWJ signal,
HWJX1i、HWJX2iFor route two sides breaker HWJ signal, STFCLiFor the received magnetic circuit control type failure limit of line protective devices
Flow the status information (ST of deviceFCLiMagnetic circuit control type fault current limiter failure when being 1, abnormal when being 0).QdxFor route protection locking
Signal.
3b-2) line protective devices meet blocking device after route protection block signal, and are believed locking by MMS message
Breath is sent to SCADA system in station, is uploaded to scheduling D5000 system by SCADA system in standing.
After 3b-3) safety and stability control device receives fault current limiter status signal, combined circuit two sides breaker position
After confidence acknowledgement state, starting operation strategy switching judging.The starting of safety and stability control device action policy switching signal
Criterion is consistent with line protective devices.
3b-4) safety and stability control device arrives of short duration blocking device, starting dress after meeting action policy switching enabling signal
Set action policy switching.Safety and stability control device, which will act, to be sent in switchover policy information to scheduling D5000 system.
4: after scheduling D5000 system receives magnetic circuit control type fault current limiter failure and subsequent action information, adjustment electricity
Net trend and Unit Combination adjustment, improve electric power netting safe running.This partly belongs to power grid defence level.It is specific as follows:
41) scheduling D5000 system receives fault current limiter protection act information, fault current limiter status information, bypass
After breaker or route two sides circuit breaker position displacement information, line protective devices and safety and stability control device handover information,
Judge live operation of power networks state.If configuring bypass breaker, magnetic circuit control type fault current limiter function is exited, again right
Grid operation mode is checked.If bypass breaker is not configured, magnetic circuit control type fault current limiter is removed, same to luck
Row line is also removed, and is equivalent to line maintenance, is checked again to grid operation mode.
42) it according to grid operation mode check result, is adjusted by line loop operation and Unit Combination mode, using artificial side
Formula is adjusted grid operation mode, trend mode.
The invention proposes a kind of power grids of magnetic circuit control type fault current limiter to access defense system, guarantees to control in magnetic circuit
Type fault current limiter breaks down after power grid access, guarantees that power network line protective device movement definite value and criterion carry out adaptability
Switching, reduce occur malfunction and misaction probability.Guarantee that safety and stability control device strategy carries out the change of adaptability, reduces
The probability of tactful mismatch occurs.It is adjusted by the method for operation and trend mode of grid side, improves safe operation of electric network.This hair
The bright adaptability for improving power grid control measure after fault current limiter equipment fault further supports magnetic circuit control type failure limit
Flow the practical bulk power grid application of device.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of power grid of magnetic circuit control type fault current limiter accesses defence method, which comprises the following steps:
1) config failure current limiter protective device is monitored magnetic circuit control type fault current limiter abnormality；
2) after monitoring magnetic circuit control type fault current limiter exception, defending in place is opened；The defending in place refers to, failure current limit
Device protective device is isolated by bypass breaker or cuts off magnetic circuit control type fault current limiter by route two sides circuit breaker trip；
3) line protective devices carry out definite value and criterion switching, and safety and stability control device carries out action policy switching；
4) scheduling D5000 system receives fault current limiter protection act information, fault current limiter status information, bypass breaker
Or after route two sides circuit breaker position displacement information, line protective devices and safety and stability control device handover information, judgement is existing
Field operation of power networks state, checks grid operation mode；According to grid operation mode check result, by line loop operation and
Unit Combination mode adjusts, and is adjusted using manual type to grid operation mode, trend mode.
2. a kind of power grid of magnetic circuit control type fault current limiter according to claim 1 accesses defence method, feature exists
In in the step 1), fault current limiter protective device monitors magnetic circuit control type failure current limit by normal cable or SV mode
Device two sides electric current and voltage.
3. a kind of power grid of magnetic circuit control type fault current limiter according to claim 1 accesses defence method, feature exists
In in the step 2), fault current limiter protective device configures magnetic circuit control type fault current limiter differential protection, through-flow overload is protected
Shield and non-ionizing energy loss,
The differential protection judgement is as follows:
Wherein, Φ represents any one phase of A, B, C, Δ IdΦFor difference current, Δ IrΦFor stalling current, IMΦ、INΦFor magnetic circuit control
Type fault current limiter two sides electric current, IsetFor differential current threshold value；
The through-flow overload protection judgement is as follows:
Wherein, It_setFor the logical energy ability definite value of electric current, U1Survey positive sequence voltage, U2Survey negative sequence voltage, Uset1It is different for positive sequence voltage
Normal definite value, Uset2Negative sequence voltage exception definite value；
The non-ionizing energy loss judgement are as follows: after magnetic circuit control type fault current limiter self monitor to failure, sent out by remote signalling mode
It send to fault current limiter protective device, fault current limiter protective device receives after failure remote signalling opens, and prolongs by 3ms~5ms
When act, combined floodgate bypass breaker or tripping route two sides breaker.
4. a kind of power grid of magnetic circuit control type fault current limiter according to claim 1 accesses defence method, feature exists
In in the step 2), if magnetic circuit control type fault current limiter configures bypass breaker, defending in place process are as follows:
2a-1) fault current limiter protective device is sent to close a floodgate by GOOSE communication mode and be ordered to bypass breaker intelligent terminal
Device, by breaker closing；
After 2a-2) bypass breaker receives combined floodgate order, executing agency by breaker closing, tripping position relay TWJ and
Closing operation position relay HWJ signal conjugates, and fault current limiter protective device is logical by remote signalling access or intelligent terminal GOOSE
Believe that interface position conjugates information；
2a-3) fault current limiter protective device passes through GOOSE communication mode for fault current limiter status signal, bypass breaker position
It sets displacement signal and is sent to line protective devices and associated safety stabilization control device；
2a-4) fault current limiter protective device is by MMS communication mode by fault current limiter status signal, bypass breaker position
Displacement signal is sent to SCADA system in station, is forwarded to scheduling D5000 system by SCADA system in standing.
5. a kind of power grid of magnetic circuit control type fault current limiter according to claim 1 accesses defence method, feature exists
In in the step 2), if bypass breaker, defending in place process is not configured in magnetic circuit control type fault current limiter are as follows:
2b-1) fault current limiter protective device sends trip signal to route two sides breaker intelligence by GOOSE communication mode
Terminal, by circuit breaker trip；
After 2b-2) route two sides breaker receives trip signal, executing agency is by circuit breaker trip, tripping position relay
TWJ and closing operation position relay HWJ signal conjugate, and fault current limiter protective device passes through remote signalling access or intelligent terminal
GOOSE communication interface receives position and conjugates information；
2b-3) fault current limiter protective device passes through GOOSE communication mode for fault current limiter status signal, bypass breaker position
It sets displacement signal and is sent to line protective devices and associated safety stabilization control device；
2b-4) fault current limiter protective device is by MMS communication mode by fault current limiter status signal, bypass breaker position
Displacement signal is sent to SCADA system in station, is forwarded to scheduling D5000 system by SCADA system in standing.
6. a kind of power grid of magnetic circuit control type fault current limiter according to claim 1 accesses defence method, feature exists
In, in the step 2), if bypass breaker refuses to close or route two sides breaker is refused to jump, actuating breaker failure protection device, excision
Bus two sides whole wire-outgoing breaker；Then based Cb Failure Protection passes through MMS message sending action information to D5000 system.
7. a kind of power grid of magnetic circuit control type fault current limiter according to claim 4 accesses defence method, feature exists
In, in the step 3), if magnetic circuit control type fault current limiter configures bypass breaker,
After 3a-1) line protective devices receive fault current limiter status signal, shape is confirmed in conjunction with bypass breaker position signal
After state, start definite value and operating criterion switching judging；After safety and stability control device receives fault current limiter fault-signal, knot
After closing bypass breaker position signal acknowledgement state, starting operation strategy switching judging；Judge that signal is equal are as follows:
Wherein, Qd is to judge signal, and i indicates that line protective devices/safety and stability control device i-th is interrupted, TWJPiFor side
Circuit breaker TWJ signal, HWJPiFor bypass breaker HWJ signal, STFCLiFor line protective devices line protective devices/safety
The status signal of the received magnetic circuit control type fault current limiter of stabilization control device, STFCLiMagnetic circuit control type failure current limit when being 1
Device failure is abnormal when being 0；Start switching after Qd=1, otherwise keeps original customization and criterion；
3a-2) line protective devices arrive of short duration blocking device after meeting definite value and operating criterion switching enabling signal, start definite value
Switch with operating criterion；Operating criterion is switched to the criterion without considering fault current limiter transient characterisitics, and distance protection, zero sequence are protected
Shield definite value switching does not consider the definite value of magnetic circuit control type fault current limiter investment impedance；The movement of safety and stability control device satisfaction is cut
Of short duration blocking device, the switching of starter action policy are arrived after changing tactful enabling signal；
After the completion of 3a-3) definite value and operating criterion and action policy switch, restore to operate normally, and will determine by MMS message
Value and operating criterion and action policy information are sent to SCADA system in station, are uploaded to scheduling by SCADA system in standing
D5000 system.
8. a kind of power grid of magnetic circuit control type fault current limiter according to claim 5 accesses defence method, feature exists
In, in the step 3), if bypass breaker is not configured in magnetic circuit control type fault current limiter,
3b-1) line protective devices conjugate signal, route after receiving fault current limiter status signal and line-breaker tripping
It is already cut off, line protective devices start the judgement of route block signal；Safety and stability control device receives fault current limiter
After status signal, after the circuit breaker position signal acknowledgement state of combined circuit two sides, starting operation strategy switching judging；Judge signal
Are as follows:
Wherein, QdxTo judge that signal, i are the interruption of line protective devices/safety and stability control device i-th, TWJX1i、TWJX2i
For route two sides breaker TWJ signal, HWJX1i、HWJX2iFor route two sides breaker HWJ signal, STFCLiFor route protection dress
Set/the status information of the received magnetic circuit control type fault current limiter of safety and stability control device, STFCLiMagnetic circuit control type when being 1
Fault current limiter failure is abnormal when being 0；
3b-2) line protective devices meet blocking device after route protection block signal, the movement of safety and stability control device satisfaction
Of short duration blocking device, the switching of starter action policy are arrived after strategy switching enabling signal, and information will be latched by MMS message
It is sent to SCADA system in station with action policy message, scheduling D5000 system is uploaded to by SCADA system in standing.
9. a kind of power grid of magnetic circuit control type fault current limiter according to claim 1 accesses defence method, feature exists
In in the step 4), if configuration bypass breaker, magnetic circuit control type fault current limiter function is exited, again to power grid
The method of operation is checked；If bypass breaker is not configured, magnetic circuit control type fault current limiter is removed, while running line
Road is also removed, and is checked again to grid operation mode.
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