CN106711925A - Wind farm single circuit outgoing line self-adaptive three-phase recloser and method thereof - Google Patents

Wind farm single circuit outgoing line self-adaptive three-phase recloser and method thereof Download PDF

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Publication number
CN106711925A
CN106711925A CN201611222877.0A CN201611222877A CN106711925A CN 106711925 A CN106711925 A CN 106711925A CN 201611222877 A CN201611222877 A CN 201611222877A CN 106711925 A CN106711925 A CN 106711925A
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China
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phase
wind power
power plant
load
circuit
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CN201611222877.0A
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CN106711925B (en
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李凤婷
解超
路亮
陶仁峰
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Xinjiang University
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Xinjiang University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/027—Details with automatic disconnection after a predetermined time
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Wind Motors (AREA)

Abstract

The invention belongs to the wind power generation technology field, especially relates to a wind farm single circuit outgoing line self-adaptive three-phase reclosing strategy. According to the strategy, after the tripping of the three phases of the wind farm single circuit outgoing line, time of maintaining the transient stability of the wind farm is prolonged; and at the same time, the fault property of the outgoing line is determined: when the fault is transient, and disappears, a circuit is reclosed by a reclosing motion; when the fault is permanent, a recloser is locked, and the line is not superposed. Under a precondition of prolonging the transient stablility time of the wind farm, the rapid determining of the fault property of the outgoing line of the wind farm is realized, and superposition success rate after the tripping of the three phases of the wind farm outgoing line is effectively improved, and therefore second impact on a system caused by the superposition with the permanent fault and the existing transient fault is prevented.

Description

Wind power plant list loopback outlet self adaptation three_phase reclosing and its method
Technical field
The invention belongs to technical field of wind power generation, more particularly to a kind of wind power plant list loopback outlet self adaptation three coincides Lock.
Background technology
Away from load center, wind-powered electricity generation place generates electricity can be collected to wind power plant submitting line to China's wind power resources through collecting electric line (110kV~330kV) delivers to load center in sending into power network afterwards through higher voltage grade (750kV) transmission line of electricity.This energy Mode of movement is caused：(1) wind power plant is without local load or the only load with very little；(2) it is generally single time that wind power plant sends out line.
Wind power plant is designed according to the principle of maximal power tracing, and the ability without fast frequency hopping and pressure regulation.Institute So that once by three-phase tripping, the substantial amounts of active surplus of wind power plant will make wind power plant because of frequency and voltage for wind power plant list loopback outlet Out-of-limit rapid unstability, the successful possibility of wind farm side synchronous recloser is extremely low.If wind power plant can not successfully overlap, need to be through event Barrier positions the process such as grid-connected once again with treatment, inspection verification, reporting scheduling can be grid-connected once again.This process at least needs consuming 48 Hour, the economic loss that will cause can not ignore to wind power plant.
At present, the coincidence strategy after wind power plant list loopback outlet three-phase tripping is：Wind farm side is abandoned using the inspection same period Coincidence system, then by the way of " inspection bus have pressure without line ball road ", that is, treat that Wind turbines all cut machine in wind power plant After can overlap.It is again grid-connected time-consuming that although this mode effectively reduces wind power plant, but still fails to reach maintenance wind power plant Power supply reliability purpose；The method does not make differentiation before coincidence to line fault property, once coincide with permanent Failure or the transient fault for not yet disappearing, it will secondary pulse is caused to system.
The content of the invention
The present invention is directed to problem above, it is proposed that a kind of wind power plant list loopback outlet self adaptation three_phase reclosing strategy；Should Can be after wind power plant list loopback outlet three-phase tripping, extension wind power plant maintains the temporarily steady time to strategy；Meanwhile, judge to send out line Nature of trouble：Failure is instantaneity and when having disappeared, and reclosing is acted coincidence circuit, failure for it is permanent when, locking weight Close a floodgate, misaligned circuit.The present invention realizes wind power plant and sends out line nature of trouble on the premise of wind power plant temporary stability time is extended Quick, effectively increase the successful reclosing rate after wind power plant sends out line three-phase tripping, and avoid coincide with it is permanent The secondary pulse that failure or the transient fault for not yet disappearing are caused to system.
The present invention proposes a kind of wind power plant list loopback outlet self adaptation three_phase reclosing strategy, and particular content is as follows：
Appropriate substitutional load is installed additional in wind power plant outlet main transformer low-pressure side, cut-out blower fan when necessary, so that Extension isolated network containing wind power plant maintains the temporarily steady time, is to overlap the wind farm side inspection same period to gain time；Line wind is sent out in wind power plant Electric field side installs charging capacitor additional, sends out line three-phase tripping, is put into after constant time lag, by detecting that charging capacitor voltage change is special Property, whether cycle criterion line fault disappear, and transient fault disappearance rear allows to overlap, before failure vanishes and permanent fault It is misaligned, with the secondary pulse for avoiding reclosing failure from causing.
Implement step as follows：
1) after wind power plant sends out line three-phase tripping, substitutional load is put into.Substitutional load is variable resistor, its capacity PRmax, According to the average annual P that exerts oneself of wind power plantWWith local average annual load PLDifference set substitutional load size, i.e.,：
PRmax=PW-PL (1)
After wind power plant sends out the tripping operation of line three-phase, if sending out line transimission power P before failure0≤PRmax, put into substitutional load The stabilization of wind farm side is maintained, the substitutional load capacity for now accessing is：
PR=P0 (2)
If sending out line transimission power P before failure0>PRmax, throw the substitutional load P of maximum capacityR.max, while wind power plant cuts off It is P to exert oneselfWCPart fan capacity access substitutional load capacity be：
PR=PRmax=P0-PWC (3)
2) the reason for judging circuit breaker trip, if jump, then cuts off substitutional load step by step after quick coincidence；If artificial Operation, then misaligned circuit, cuts off substitutional load.Otherwise it is transferred to 3).
3) the circuit blow-out time is taken into account, time delay 0.5s accesses the three-phase charging capacitor for filling different voltages, connecting duration Δ t is 0.1s。
4) based on each phase capacitance voltage value, judge whether circuit recovers normal condition.During electric capacity is accessed, if three-phase charges Three-phase voltage decay is no more than setting valve at capacitance voltage, that is, capacitance connection, then judge line fault as instantaneity and disappeared Lose, i.e.,：
In formula (4), uX(tN) for charging capacitor access during electric capacity access point each phase voltage；X=A, B, C；tNIt is electric capacity N-th turn-on time；Δ t is the duration of one-time detection；K is the setting valve close to zero.After being disappeared because of oscillation circuit, voltage pulsation Very little, k values take 3% in the present invention.If three-phase voltage at least is in mutually attenuation characteristic, judge that circuit does not recover normal also.
If failure vanishes, after excision charging capacitor, circuit overlaps.If circuit does not recover normal yet, capacitance switch is disconnected, it is right Each phase electric capacity recharges 0.2s.Return perform 3)~4).
If 5) circuit does not recover normal yet after 5 judgement cycles, judge that circuit occurs permanent fault, it is misaligned, cut Except substitutional load, wind power plant is out of service.
The substitutional load that the present invention is used be can switching capacity step by step air-cooled resistor box, charging capacitor is BMSJ1.14-15-3 type three phase capacitances, dc source is BTK-12001 type high-voltage dc stabilization pressuring powers.
It is characteristic of the invention that：Propose a kind of wind power plant list loopback outlet self adaptation three_phase reclosing strategy.The strategy leads to Cross in wind power plant outlet main transformer input substitutional load, cut-out blower fan when necessary, so as to extend the dimension of isolated network containing wind power plant The temporarily steady time is held, is to overlap the wind farm side inspection same period to gain time；Line wind farm side is sent out in wind power plant install charging capacitor additional, Line three-phase tripping is sent out, is put into after constant time lag, by detecting charging capacitor voltage change characteristic, cycle criterion line fault Whether disappear, transient fault disappearance rear allows to overlap, before failure vanishes and permanent fault is misaligned, lost with avoiding overlapping Lose the secondary pulse for causing.
Brief description of the drawings
Fig. 1 is the on-position figure of charging capacitor of the invention and substitutional load.
Wherein A wind power plants；B main transformers；C electric capacity；D breakers；E batteries；R substitutional loads；On-load switch Kr；Capacitance switch Kc；Battery switch Kb。
Fig. 2 is operational flowchart of the invention.
Fig. 3 is during wind power plant sends out line A phase ground-fault conditions, input charging capacitor, to send out each phase voltage curve of line Figure.
Fig. 4 is during wind power plant sends out line AB double earthfault states, input charging capacitor, to send out each phase voltage of line bent Line chart.
Fig. 5 is during wind power plant sends out line three-phase ground malfunction, input charging capacitor, to send out each phase voltage curve of line Figure.
Fig. 6 is during wind power plant sends out line AB two-phase short-circuit fault states, input charging capacitor, to send out each phase voltage of line bent Line chart.
Fig. 7 is during wind power plant sends out line three phase short circuit fault state, input charging capacitor, to send out each phase voltage curve of line Figure.
Fig. 8 is after wind power plant sends out line failure vanishes, during input charging capacitor, to send out each phase voltage curve map of line.
Fig. 9 is that wind power plant is sent out line and exerted oneself during more than substitutional load capacity, reclosing strategy of the present invention and traditional plan that overlaps Omit wind power plant exit potential comparison diagram.
Figure 10 is that wind power plant is sent out line and exerted oneself during less than or equal to substitutional load capacity, reclosing strategy of the present invention and tradition weight Close tactful wind power plant exit potential comparison diagram.
Specific embodiment
The present invention proposes a kind of wind power plant list loopback outlet self adaptation three_phase reclosing and its method, and particular content is such as Under：
Appropriate substitutional load is installed additional in wind power plant outlet main transformer low-pressure side, cut-out blower fan when necessary, so that Extension isolated network containing wind power plant maintains the temporarily steady time, is to overlap the wind farm side inspection same period to gain time；Line wind is sent out in wind power plant Electric field side installs charging capacitor additional, sends out line three-phase tripping, is put into after constant time lag, by detecting that charging capacitor voltage change is special Property, whether cycle criterion line fault disappear, and transient fault disappearance rear allows to overlap, before failure vanishes and permanent fault It is misaligned, with the secondary pulse for avoiding reclosing failure from causing.
Implement step as follows：
1) after wind power plant sends out line three-phase tripping, substitutional load is put into.Substitutional load is variable resistor, its capacity PRmax, According to the average annual P that exerts oneself of wind power plantWWith local average annual load PLDifference set substitutional load size, i.e.,：
PRmax=PW-PL (1)
After wind power plant sends out the tripping operation of line three-phase, if sending out line transimission power P before failure0≤PRmax, put into substitutional load The stabilization of wind farm side is maintained, the substitutional load capacity for now accessing is：
PR=P0 (2)
If sending out line transimission power P before failure0>PRmax, throw the substitutional load P of maximum capacityR.max, while wind power plant cuts off It is P to exert oneselfWCPart fan capacity access substitutional load capacity be：
PR=PRmax=P0-PWC (3)
2) the reason for judging circuit breaker trip, if jump, then cuts off substitutional load step by step after quick coincidence；If artificial Operation, then misaligned circuit, cuts off substitutional load.Otherwise it is transferred to 3).
3) the circuit blow-out time is taken into account, time delay 0.5s accesses the three-phase charging capacitor for filling different voltages, connecting duration Δ t is 0.1s。
4) based on each phase capacitance voltage value, judge whether circuit recovers normal condition.During electric capacity is accessed, if three-phase charges Three-phase voltage decay is no more than setting valve at capacitance voltage, that is, capacitance connection, then judge line fault as instantaneity and disappeared Lose, i.e.,：
In formula (4), uX(tN) for charging capacitor access during electric capacity access point each phase voltage；X=A, B, C；tNIt is electric capacity N-th turn-on time；Δ t is the duration of one-time detection；K is the setting valve close to zero.After being disappeared because of oscillation circuit, voltage pulsation Very little, k values take 3% in the present invention.If three-phase voltage at least is in mutually attenuation characteristic, judge that circuit does not recover normal also.
If failure vanishes, after excision charging capacitor, circuit overlaps.If circuit does not recover normal yet, capacitance switch is disconnected, it is right Each phase electric capacity recharges 0.2s.Return perform 3)~4).
If 5) circuit does not recover normal yet after 5 judgement cycles, judge that circuit occurs permanent fault, it is misaligned, cut Except substitutional load, wind power plant is out of service.
Implement detailed description as follows：
According to charging capacitor shown in Fig. 1 and the on-position of substitutional load, accessed Xinjiang 49.5MW wind power plants and sent out Line relevant position.The wind-powered electricity generation place generates electricity can be sent out through 35/220kV main transformers by single loop line that length is 100km.The wind power plant It is average annual exert oneself with the local difference about wind power plant EIAJ of load every year 65%, the choosing of substitutional load capacity as previously described Take method, it is considered to which certain nargin, the maximum capacity for setting substitutional load is 33MW.If sending out line midpoint during 1.5s to break down, A length of 0.7s during failure.
Send out line three-phase during 1.51s to trip and access substitutional load, 2.01s charging capacitors are accessed, a length of 0.1s during access. Be grounded when fault type is respectively A phases, AB two phase grounds, three-phase ground, AB line to line fault, three-phase short circuit metal failure and these When fault resistance is 100 Ω and these fault resistances are 100 Ω, 2.01s~2.11s is accessed charge for the first time During electric capacity, the relaxation phenomenon that faulted phase voltage takes a different form；Relatively, perfect phase voltage and relaxation phenomenon, base do not occur Originally remain unchanged.During 2.31s~2.41s accesses charging capacitor second, three-phase voltage remains unchanged substantially.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although with reference to foregoing reality Example is applied to be described in detail the present invention, for the person of ordinary skill of the art, still can be to foregoing implementation Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace Change, do not make the spirit and scope of the essence disengaging claimed technical solution of the invention of appropriate technical solution.

Claims (4)

1. a kind of wind power plant list loopback outlet self adaptation three_phase reclosing, it is characterised in that export main transformer low-pressure side in wind power plant Install substitutional load additional, substitutional load is by on-load switch control；Line wind farm side is sent out in wind power plant install charging capacitor, installation position additional Put and sending on the inside of wire-outgoing breaker, by capacitance switch control, charging capacitor is pre-charged charging capacitor before accessing by dc source, is sent Access charging capacitor in outlet three-phase tripping rear.
2. a kind of wind power plant list loopback outlet self adaptation three_phase reclosing according to claim 1, application method step is as follows：
1) after wind power plant sends out line three-phase tripping, substitutional load is put into.Substitutional load is variable resistor, its capacity PRmax, according to wind The average annual P that exerts oneself of electric fieldWWith local average annual load PLDifference set substitutional load size, i.e.,：
PRmax=PW-PL (1)
After wind power plant sends out the tripping operation of line three-phase, if sending out line transimission power P before failure0≤PRmax, input substitutional load can maintenance The stabilization of wind farm side, the substitutional load capacity for now accessing is：
PR=P0 (2)
If sending out line transimission power P before failure0>PRmax, throw the substitutional load P of maximum capacityR.max, while wind power plant excision is exerted oneself It is PWCPart fan capacity access substitutional load capacity be：
PR=PRmax=P0-PWC (3)
2) the reason for judging circuit breaker trip, if jump, then cuts off substitutional load step by step after quick coincidence；If artificial behaviour Make, then misaligned circuit, cut off substitutional load.Otherwise it is transferred to 3).
3) the circuit blow-out time is taken into account, time delay 0.5s accesses the three-phase charging capacitor for filling different voltages, connecting duration Δ t is 0.1s。
4) based on each phase capacitance voltage value, judge whether circuit recovers normal condition.During electric capacity is accessed, if three-phase charging capacitor Three-phase voltage decay is no more than setting valve at voltage, that is, capacitance connection, then judge line fault as instantaneity and disappeared, I.e.：
In formula (4), uX(tN) for charging capacitor access during electric capacity access point each phase voltage；X=A, B, C；tNIt is electric capacity N Secondary turn-on time；Δ t is the duration of one-time detection；K is the setting valve close to zero.After being disappeared because of oscillation circuit, voltage pulsation is very Small, k values take 3% in the present invention.If three-phase voltage at least is in mutually attenuation characteristic, judge that circuit does not recover normal also.
If failure vanishes, after excision charging capacitor, circuit overlaps.If circuit does not recover normal yet, capacitance switch is disconnected, to each phase Electric capacity recharges 0.2s.Return perform 3)~4).
If 5) circuit does not recover normal yet after 5 judgement cycles, judge that circuit occurs permanent fault, misaligned, excision is replaced For load, wind power plant is out of service.
3. a kind of wind power plant list loopback outlet self adaptation three_phase reclosing according to claim 1, it is characterised in that substitute Load be can switching capacity step by step air-cooled resistor box.
4. a kind of wind power plant list loopback outlet self adaptation three_phase reclosing according to claim 1, it is characterised in that charge Electric capacity is BMSJ1.14-15-3 type three phase capacitances, and dc source is BTK-12001 type high-voltage dc stabilization pressuring powers.
CN201611222877.0A 2016-12-27 2016-12-27 self-adaptive three-phase reclosing lock for single loop outgoing line of wind power plant and method thereof Expired - Fee Related CN106711925B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611222877.0A CN106711925B (en) 2016-12-27 2016-12-27 self-adaptive three-phase reclosing lock for single loop outgoing line of wind power plant and method thereof

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Application Number Priority Date Filing Date Title
CN201611222877.0A CN106711925B (en) 2016-12-27 2016-12-27 self-adaptive three-phase reclosing lock for single loop outgoing line of wind power plant and method thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108390352A (en) * 2018-04-23 2018-08-10 新疆大学 A kind of wind-powered electricity generation submitting line fault nature examination method and system
CN112260236A (en) * 2020-09-17 2021-01-22 湘潭大学 Three-phase self-adaptive reclosing method and device
CN114079274A (en) * 2021-09-29 2022-02-22 华电电力科学研究院有限公司 Reclosing method of wind power plant current collection circuit based on wireless differential protection
CN114465196A (en) * 2022-02-25 2022-05-10 南京理工大学 Line superposition method suitable for wind power plant to access power distribution network

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103208851A (en) * 2013-04-16 2013-07-17 安徽理工大学 Vertical-axis wind power converter device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103208851A (en) * 2013-04-16 2013-07-17 安徽理工大学 Vertical-axis wind power converter device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108390352A (en) * 2018-04-23 2018-08-10 新疆大学 A kind of wind-powered electricity generation submitting line fault nature examination method and system
CN108390352B (en) * 2018-04-23 2019-09-03 新疆大学 A kind of wind-powered electricity generation submitting line fault nature examination method and system
CN112260236A (en) * 2020-09-17 2021-01-22 湘潭大学 Three-phase self-adaptive reclosing method and device
CN114079274A (en) * 2021-09-29 2022-02-22 华电电力科学研究院有限公司 Reclosing method of wind power plant current collection circuit based on wireless differential protection
CN114079274B (en) * 2021-09-29 2023-08-22 华电电力科学研究院有限公司 Wind power plant current collection circuit reclosing method based on wireless differential protection
CN114465196A (en) * 2022-02-25 2022-05-10 南京理工大学 Line superposition method suitable for wind power plant to access power distribution network

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