CN105391033A - Layered domain-partitioned anti-islanding protection method for large-scale wind power generation - Google Patents

Layered domain-partitioned anti-islanding protection method for large-scale wind power generation Download PDF

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Publication number
CN105391033A
CN105391033A CN201510824628.8A CN201510824628A CN105391033A CN 105391033 A CN105391033 A CN 105391033A CN 201510824628 A CN201510824628 A CN 201510824628A CN 105391033 A CN105391033 A CN 105391033A
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China
Prior art keywords
bus
fault
island
energy turbine
wind energy
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CN201510824628.8A
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CN105391033B (en
Inventor
汪宁渤
路亮
丁坤
胡家兵
周识远
熊雪君
李津
李晓龙
陈家乐
陟晶
黄璐涵
孙辰军
摆念宗
魏明磊
黄蓉
孔凡伟
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Huazhong University of Science and Technology
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
State Grid Gansu Electric Power Co Ltd
Wind Power Technology Center of Gansu Electric Power Co Ltd
Original Assignee
Huazhong University of Science and Technology
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
State Grid Gansu Electric Power Co Ltd
Wind Power Technology Center of Gansu Electric Power Co Ltd
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Application filed by Huazhong University of Science and Technology, State Grid Corp of China SGCC, State Grid Hebei Electric Power Co Ltd, State Grid Gansu Electric Power Co Ltd, Wind Power Technology Center of Gansu Electric Power Co Ltd filed Critical Huazhong University of Science and Technology
Priority to CN201510824628.8A priority Critical patent/CN105391033B/en
Publication of CN105391033A publication Critical patent/CN105391033A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency 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
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency 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
    • H02H7/04Emergency 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 for transformers
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency 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
    • H02H7/22Emergency 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 for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/226Emergency 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 for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency 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
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/267Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for parallel lines and wires

Abstract

The invention discloses a layered domain-partitioned anti-islanding protection method for large-scale wind power generation. The method includes the steps of: monitoring all breaker tripping signals in a wind power generation system; judging when cluster main station outgoing tie lines and a main transformer are all disconnected according to the breaker tripping signal of the cluster main station, and protecting an island formed due to disconnection of all the cluster main station outgoing tie lines and the main transformer; judging whether an island is formed due to a wind power plant collection bus fault according to the breaker tripping signal of the wind power plant collection bus, and protecting the island formed by the wind power plant collection bus fault; and judging whether an island is formed due to a wind power plant current collection feeder line fault according to the breaker tripping signal of a blower fan feeder line, and protecting the island formed by the wind power plant current collection feeder line fault. The layered domain-partitioned anti-islanding protection method for large-scale wind power generation realizes the advantages of being rapid, accurate, efficient, safe and stable.

Description

Layering for large-scale wind generating divides territory anti-island protect method
Technical field
The present invention relates to large-scale wind to generate electricity anti-island protect field, particularly, relate to a kind of anti-island protect method in layering point territory for large-scale wind generating.
Background technology
Large Scale Wind Farm Integration (base) island state refers in Large Scale Wind Farm Integration (base), after part Wind turbines and major network depart from, continues the running status of powering to its lower institute on-load.In large-scale wind electricity generation system, effectively and timely detect isolated island to Wind turbines and local load significant.Isolated island in the principle that large-scale wind power access isolated island causes and situation and distribution is different, so, also have different compared with the harm in distribution of the harm of large-scale wind power access generation isolated island and isolated island.First, after isolated island occurs in large-scale wind power access, the quality of power supply is also uncontrollable.But even more serious threat is, the overvoltage problem in islanded system.
Cause superpotential reason in Large Scale Wind Farm Integration (base) islanded system to have a lot, summary summarizes, and has several as follows: 1) under some failure situations, islanded system loses system earth; Blower fan is generally obtain system zero point by the central point of step-up transformer, and when feeder fault, blower fan and feeder line lose system earth, and healthy phases voltage rises to phase voltage before the fault of 1.73 times.2) the distinctive fault characteristic of blower fan, fan converter is generally carry out Current Control, blower fan is boosted by transformer step by step, blower fan also needs, by longer current collection feeder line, electric energy is delivered to booster stations, there is larger reactance in such a system, system impedance is large, and electromagnetic environment is comparatively complicated, under unexpected power-off, larger temporary overvoltage can be produced.3) islanded system is time-dependent system, and its damping is less, can produce larger temporary overvoltage.4) if when reclosing starts, system is power-off not yet, there will be surge voltage, and more serious situation is that non-synchronous reclosing occurs, and at this moment, will there will be very large temporary overvoltage.
At present, conventional power distribution network island detection method is mainly divided three classes: (1) passive detection method; (2) active detecting method; (3) based on the detection method of signal of communication.
Passive detection method monitors one or more electrical network electric parameters, according to electric parameters and the direct deviation of set threshold value, can judge whether interest region island operation state occurs.Multiple factor of judgment such as the general ANOMALOUS VARIATIONS by finding harmonic wave in frequency, the abnormal numerical value at voltage or phase angle or detection system, comprehensive analyze after can determine the existence of isolated island.
The advantage of passive detection method is, because the control strategy of combining inverter itself just needs test side voltage, this method does not need to increase extra hardware circuit or independently protection relay; Noiseless to electrical network, on the quality of power supply without impact; Under multiple stage inverter, detection efficiency can not reduce.Its problem is that non-surveyed area (Non-DetectionZone, NDZ) is likely quite large, and threshold threshold value is difficult to setting, has both been higher than value during normal operation, and has been less than value during isolated island again.In order to reduce NDZ, the normal sensitivity improving device, but equipment fault-free trip can be caused, the normal operation of influential system; In certain circumstances, NDZ is very large; Some parameter can not directly be measured, and need complicated calculating just can obtain, its error of calculation and computing time also can have an impact to Detection results.
Active detecting method is injecting voltage, frequency or phase angle in electrical network, thus cause the disturbance at line voltage, frequency or phase angle, these disturbances for be incorporated into the power networks state time power distribution network, because the balance being subject to major network is clamped down on, disturbing signal effect is not obvious; But when isolated island occurs, these perturbation actions are just comparatively obvious, can, by checking the system responses of points of common connection (PCC), judge whether isolated island occurs.
The advantage of active detecting method is that NDZ is less, and accuracy of detection is higher, can detect isolated island exactly.The shortcoming of the method is owing to introducing disturbance quantity, causes the transient response that the electrical network quality of power supply declines and electrical network is unnecessary; Control algolithm is more complicated, practical application difficulty; Under different load characteristics, there is very big-difference in Detection results, even lost efficacy time serious.
What the detection method based on signal of communication adopted wired or wireless communication mode to detect circuit breaker cut-offs state, and the change according to circuit-breaker status determines whether to there occurs isolated island.
Detection method advantage based on signal of communication: detection zone (NDZ), detection are accurately and reliably nothing but; Islanding detect for single or multiple inverter is all effective; Its performance and the type of DG device have nothing to do, and also can not cause interference to the normal operation of electrical network, are therefore very reliable island detection methods.This method shortcoming: need to add equipment, realize cost high, complicated operation, need a lot of certification, economy is low.
Current main method is all carry out islanding detect in low-voltage network, for large-scale wind generating voltage levels islanding detect and have no pertinent literature.At present, existing power distribution network islanding detect Patents is mainly divided into following a few class:
Passive detection method: the patent No. be 201510084241.3 patent propose a kind of anti-island protect method of novel photovoltaic plant passive type.The method is applied to large-scale photovoltaic power station and concentrates the transformer station that is connected to the grid; by calculating power frequency fault impedance and power factor change; through impedance criterion and power factor criterion; whether comprehensive descision there is the independent load carrying little isolated island of photovoltaic plant and photovoltaic plant load carrying large isolated island together with transformer station; once detect the corresponding grid-connected switch of isolated island tripping immediately, to protect the safety of operating maintenance personnel and equipment.The method belongs to passive detection method, and is research object with photovoltaic plant.
Active detecting method: the patent No. be 201410221942.2 patent provide a kind of Wind turbines isolated island method of testing.An isolated island generating means is connected between Wind turbines outlet transformer and wind energy turbine set step-up transformer, Wind turbines is made to be in island state by regulating isolated island generating means, and detect Wind turbines and the grid-connected switch state signal of site three-phase current, three-phase voltage and Wind turbines, investigate Wind turbines and whether possess islet operation ability, and the off-grid time under anti-isolated island.The method belongs to active detecting method.
The patent No. be 201410741339.7 patent propose the anti-isolated island experiment detection device of a kind of photovoltaic and detection method.This anti-isolated island experiment detection device, is made up of host computer, more than one Intelligent power monitoring module, I/O Control plate, telegraph key K and adjustable RLC load blocks, can carries out island effect test to Large Copacity power supply kind equipments such as photovoltaic plants.By offered load module, detect grid-connected voltage V to judge whether island phenomenon occurs.The method belongs to active testing method, and belongs to the anti-islanding detect of photovoltaic plant.
The patent No. be 201510037485.6 patent propose a kind of grid-connected switch protection method of distributed power supply system isolated island effect prevention and grid-connected switching device.The method is the active protection carried out for the distributed power supply system of power distribution network side, by controlling combining inverter, injecting certain disturbance, detect the output situation of inverter simultaneously to its power output, frequency or phase place etc.; When electrical network normally works, due to the balanced action of electrical network, disturbing signal is not enough to the output characteristic changing combining inverter; When electric network fault or power down, due to the feedback effect of disturbing signal, the output characteristic of combining inverter will accelerated accumulation and exceed allowed band, produces the protective device that a signal triggers grid-connected switch, makes it trip.The method carries out anti-islanding detect to low-voltage network.
The patent No. be 201510242085.9 patent propose a kind of anti-island protect test circuit based on constant impedance load simulation and method.By the part throttle characteristics of constant impedance load simulation unit accurate analog RLC load in parallel, the active power that grid-connected photovoltaic inverter exports is fed to power distribution network with unity power factor, guarantees the anti-island protect triggering grid-connected photovoltaic inverter in test process.The method belongs to active detecting method.
Detection method based on signal of communication: the patent No. is that the patent of 201180043345.X proposes one for detecting the method for isolated island situation in low pressure (LV) electric power networks; the method is used in the network of Multi-Switch signal; by the position signalling of circuit breaker in Sampling network; and contrast with truth table; adopt the method for tabling look-up, and by the method disconnecting power electrical unit, system is protected.The method carries out islanding detect for power distribution network, and the method adopts the look-up table that efficiency is lower simultaneously.
The patent No. be 201210124330.2 patent provide a kind of station territory island protect method and territory, a kind of station island protect system; by obtaining the positional information of circuit breaker relevant to producing island operation state in transformer station region; judge whether to occur island operation state, and island protect action can be completed by a circuit breaker of tripping electricity generation system networking place.The method pin carries out islanding detect in transformer station's scope; and adopt a circuit breaker of tripping electricity generation system networking place to realize island protect; this method is not also suitable for the anti-island protect of large-scale wind electricity generation system; due to large-scale wind electricity generation system; each blower fan is longer to the electrical distance of wind energy turbine set primary substation; adopt the method can cause the overvoltage problem of blower fan feeder line, thus affect the service life of blower fan.
The patent No. is that the patent of 201310039649.X provides the anti-island protect system of a kind of distributed power generation grid-connected system and guard method thereof; based on carrier communication and decentralized detection technology; the information obtaining grid side by upper carrier terminal equipment is carried out isolated island and to be differentiated and the also site switch of the next carrier terminal equipment to user side distributed power source controls; excision distributed power source; prevent the generation of island effect, improve reliability and the fail safe of distributed power generation grid-connected system.The method carries out anti-island protect for distributed generation system, and the anti-isolated island not for extensive centralized wind power generation is protected.
The patent No. is that the patent of 201310086985.X provides a kind of switch changed position islanding detect based on Wide-area Measurement Information and direct tripping operation formula island protect method.Distributed power supply system is incorporated into the power networks in process, and each switch is installed FTU(feed line automatization terminal), FTU detects the state information of each switch in real time, and the folding condition according to isolated island association switch judges whether islet operation occurs.For judging the distributed power source being in islet operation, the FTU in this distributed power source exit sends the order of island protect on the spot, is disconnected by this DG exit switch, makes it out of service.The method carries out anti-island protect for distributed generation system, and the anti-isolated island not for extensive centralized wind power generation is protected.
The patent No. be 201310404177.3 patent discloses a kind of photovoltaic power station system with low voltage crossing and anti-island protect function; by checking the switching signal of electrical network circuit breaker; voltage signal v and frequency signal f; by the judgement of controller; and by control first circuit breaker; achieve isolated island to judge and anti-island protect function; and the function of low voltage crossing is achieved by arranging three-phase inverter; thus low voltage crossing and anti-island protect function are coexisted, reach the object strengthening photovoltaic power station system stability and fail safe.The method carries out anti-island protect for photovoltaic generating system, and the anti-isolated island not for extensive centralized wind power generation is protected.
The patent No. be 201310560121.7 patent provide the anti-islet operation system of a kind of many plant-grid connection transformer station.Fast and accurately by judging that the position of the switch cuts off grid-connected small power supply, avoid islet operation occurs, damaging user's electric equipment and system irregular operation for when there is line fault, main transformer fault and busbar fault in 110kV transformer station region.The method carries out anti-island protect for photovoltaic generating system, and the anti-isolated island not for extensive centralized wind power generation is protected.
The patent No. is that the patent of 201320048498.X provides a kind of intelligent RLC load and anti-circuit for detecting island, accurately can detect the anti-isolated island function of user side grid power source.By intelligent RLC load simulation user side power consumption, wave tracer record inverter output current and grid-connected current signal, judge whether island effect occurs and evaluate the anti-island protect performance of DC-AC inverter.The method carries out islanding detect in the low-voltage network of user side, does not carry out islanding detect at Generation Side high pressure major network.
The patent No. be 201410521937.3 patent provide the anti-island protect of a kind of substation areas of transformer station and prepared auto restart integral method.Whether the electric quantity information of Real-time Collection transformer station high, medium and low voltage side and switching-state information, drop in conjunction with prepared auto restart maintenance pressing plate or exit, identifying the running status that transformer station's high, medium and low voltage side element is current; According to physical cabling situation and on-the-spot operation demand, by apparatus function pressing plate, the prepared auto restart function of high, medium and low voltage side and anti-island protect is selected whether to open; Control setting high, medium and low voltage side for throwing mode by device software, and mate with the running status of the high, medium and low voltage side element identified before, if do not mated, send out alarm signal, device locking is discharged.The method possesses anti-island protect function, can detect rapidly the island state and isolated island scope that exist in transformer station, and the photovoltaic electric station grid connection switch in tripping respective range.The method only carries out islanding detect for transformer station's scope, and carries out islanding detect in large-scale wind electricity base.
Paper " the distributed power generation isolated island division methods based on improving Prim algorithm " proposes a kind of minimal spanning tree algorithm based on prim method for user side low-voltage network islanding problem and carries out isolated island division.The method needs to consider circuit weight, thus there is anti-island protect action and postpone large problem.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind of anti-island protect method in layering point territory for large-scale wind generating, to realize quick, accurate, efficient, safe and stable advantage.
For achieving the above object, the technical solution used in the present invention is:
Layering for large-scale wind generating divides territory an anti-island protect method, comprising:
All circuit breaker trip signals that S1, monitoring are arranged in wind generator system;
S2, judge that cluster main website sends interconnection and whether main transformer all disconnects by cluster main website circuit breaker trip signal, and the isolated island sending interconnection and main transformer because of disconnected cluster main website and all disconnect formation is protected;
S3, judge whether booster stations transformer fault forms isolated island by booster stations transformer breaker trip signal, and the isolated island that booster stations transformer fault is formed is protected;
S4, judge whether wind energy turbine set collection bus fault forms isolated island by wind energy turbine set collection bus circuit breaker trip signal, and the isolated island that wind energy turbine set collection bus fault is formed is protected;
S5, judge whether wind energy turbine set current collection feeder fault forms isolated island by blower fan feeder breaker trip signal, and the isolated island that wind energy turbine set current collection feeder fault is formed is protected.
Preferably,
Above-mentioned S2, judge that cluster main website sends interconnection and whether main transformer all disconnects by cluster main website circuit breaker trip signal, and the isolated island sending interconnection and main transformer because of disconnected cluster main website and all disconnect formation protected, specifically comprise:
S201: whether find cluster main website circuit breaker trip signal, if so, turn S202; If not, S3 is turned;
S202: cluster main website sends interconnection and main transformer all disconnects, and if not, does not then form isolated island, therefore turns S203; If so, then define isolated island, turn S204;
S203: island protect is failure to actuate, turns S1;
S204: excise all blower fans under this clustered control main website; Turn S1.
Preferably,
Above-mentioned S3, judge whether booster stations transformer fault forms isolated island by booster stations transformer breaker trip signal, and the isolated island that booster stations transformer fault is formed protected, specifically comprise:
S301, whether find booster stations transformer breaker trip signal, if so, turn S302; If not, S4 is turned;
S302, judge booster stations transformer connect low-pressure side collection bus and whether have bus, and this bus is in closure state, if having bus and this bus is in closure state, turns S303; If do not have bus or bus not to be be in closure state, turn S305;
S303, judge open failure booster stations transformer after, whether output system can transship, and if so, turns S304; If not, S305 is turned;
Blower fan on part feeder line under S304, excision fault booster stations station transformer to eliminate overload, and turns S1;
S305, open failure booster stations transformer, turn S4.
Preferably,
Above-mentioned S4, judge whether wind energy turbine set collection bus fault forms isolated island by wind energy turbine set collection bus circuit breaker trip signal, and the isolated island that wind energy turbine set collection bus fault is formed protected, specifically comprise:
S401: whether find wind energy turbine set collection bus circuit breaker trip signal, if so, turn S402; If not, S5 is turned;
S402: whether fault wind energy turbine set collection bus has bus, if so, turns S403, if not, turns S405;
S403: judge whether the bus be connected with fault wind energy turbine set collection bus is in closure state, if so, turns S404, if not, turns S405;
S404: disconnect the bus be connected with fault wind energy turbine set collection bus, connected all blower fans under excision fault wind energy turbine set collection bus, turn S1;
S405: excise connected all blower fans under this fault wind energy turbine set collection bus, turn S1.
Preferably,
Above-mentioned S5, judge whether wind energy turbine set current collection feeder fault forms isolated island by blower fan feeder breaker trip signal, and the isolated island that wind energy turbine set current collection feeder fault is formed protected, specifically comprise:
S501: find blower fan feeder breaker trip signal, if not, turn S1, if so, turn S502;
S502: all blower fans on excision fault wind energy turbine set current collection feeder line, turn S1.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention, for large-scale wind electricity generation system, at mains side high pressure major network, carries out the islanding detect in layering point territory and anti-island protect method, has fast, accurately, efficiently, and safety, stable advantage.Technical solution of the present invention carries out anti-islanding detect for mains side high pressure major network, meanwhile, does not consider circuit weight, can carry out anti-island protect action faster.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 divides the flow chart of the anti-island protect method in territory for the layering for large-scale wind generating described in the embodiment of the present invention;
Fig. 2 is the wind energy turbine set basic topology figure described in the embodiment of the present invention;
Fig. 3 is the wind-powered electricity generation station cluster topology graph described in the embodiment of the present invention;
Fig. 4 is for sending topological diagram in the wind-powered electricity generation station described in the embodiment of the present invention.
By reference to the accompanying drawings, in the embodiment of the present invention, Reference numeral is as follows:
In Fig. 2,42-booster stations transformer breaker two; 62-wind energy turbine set collection bus circuit breaker two; 1013,1063,1073,1083,1143,1153-tower cylinder send wire-outgoing breaker; 1061-blower fan six; 1141-blower fan 14; 1062,1142-blower break device.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Layering for large-scale wind generating divides territory an anti-island protect method, comprising:
All circuit breaker trip signals that S1, monitoring are arranged in wind generator system;
S2, judge that cluster main website sends interconnection and whether main transformer all disconnects by cluster main website circuit breaker trip signal, and the isolated island sending interconnection and main transformer because of disconnected cluster main website and all disconnect formation is protected;
S3, judge whether booster stations transformer fault forms isolated island by booster stations transformer breaker trip signal, and the isolated island that booster stations transformer fault is formed is protected;
S4, judge whether wind energy turbine set collection bus fault forms isolated island by wind energy turbine set collection bus circuit breaker trip signal, and the isolated island that wind energy turbine set collection bus fault is formed is protected;
S5, judge whether wind energy turbine set current collection feeder fault forms isolated island by blower fan feeder breaker trip signal, and the isolated island that wind energy turbine set current collection feeder fault is formed is protected.
Preferably,
Above-mentioned S2, judge that cluster main website sends interconnection and whether main transformer all disconnects by cluster main website circuit breaker trip signal, and the isolated island sending interconnection and main transformer because of disconnected cluster main website and all disconnect formation protected, specifically comprise:
S201: whether find cluster main website circuit breaker trip signal, if so, turn S202; If not, S3 is turned;
S202: cluster main website sends interconnection and main transformer all disconnects, and if not, does not then form isolated island, therefore turns S203; If so, then define isolated island, turn S204;
S203: island protect is failure to actuate, turns S1;
S204: excise all blower fans under this clustered control main website; Turn S1.
Preferably,
Above-mentioned S3, judge whether booster stations transformer fault forms isolated island by booster stations transformer breaker trip signal, and the isolated island that booster stations transformer fault is formed protected, specifically comprise:
S301, whether find booster stations transformer breaker trip signal, if so, turn S302; If not, S4 is turned;
S302, judge booster stations transformer connect low-pressure side collection bus and whether have bus, and this bus is in closure state, if having bus and this bus is in closure state, turns S303; If do not have bus or bus not to be be in closure state, turn S305;
S303, judge open failure booster stations transformer after, whether output system can transship, and if so, turns S304; If not, S305 is turned;
Blower fan on part feeder line under S304, excision fault booster stations station transformer to eliminate overload, and turns S1;
S305, open failure booster stations transformer, turn S4.
Preferably,
Above-mentioned S4, judge whether wind energy turbine set collection bus fault forms isolated island by wind energy turbine set collection bus circuit breaker trip signal, and the isolated island that wind energy turbine set collection bus fault is formed protected, specifically comprise:
S401: whether find wind energy turbine set collection bus circuit breaker trip signal, if so, turn S402; If not, S5 is turned;
S402: whether fault wind energy turbine set collection bus has bus, if so, turns S403, if not, turns S405;
S403: judge whether the bus be connected with fault wind energy turbine set collection bus is in closure state, if so, turns S404, if not, turns S405;
S404: disconnect the bus be connected with fault wind energy turbine set collection bus, connected all blower fans under excision fault wind energy turbine set collection bus, turn S1;
S405: excise connected all blower fans under this fault wind energy turbine set collection bus, turn S1.
Preferably,
Above-mentioned S5, judge whether wind energy turbine set current collection feeder fault forms isolated island by blower fan feeder breaker trip signal, and the isolated island that wind energy turbine set current collection feeder fault is formed protected, specifically comprise:
S501: find blower fan feeder breaker trip signal, if not, turn S1, if so, turn S502;
S502: all blower fans on excision fault wind energy turbine set current collection feeder line, turn S1.
The most preferred a kind of execution mode of the method is:
As shown in Figure 1, a kind of layering for large-scale wind generating divides territory anti-island protect method, comprising:
Step 1: system starts, monitoring breaker trip signal;
Step 2: whether find cluster main website circuit breaker trip signal, if so, go to step 3; If not, 6 are gone to step;
Step 3: cluster main website sends interconnection and main transformer is all disconnected? if not, then do not form isolated island, therefore go to step 4; If so, then define isolated island, go to step 5;
Step 4: island protect is failure to actuate, goes to step 1;
Step 5: excise all blower fans under this clustered control main website; Go to step 1;
Step 6: find booster stations transformer breaker trip signal? if so, 7 are gone to step; If not, 11 are gone to step;
Step 7: its connect low-pressure side collection bus and have bus and be in closure state? if so, 8 are gone to step; If not, 10 are gone to step;
Step 8: other booster stations transformers can transship? if so, 9 are gone to step; If not, 10 are gone to step;
Step 9: excise blower fan on the part feeder line under these booster stations to eliminate overload, and go to step 1;
Step 10: open failure booster stations transformer, goes to step 4;
Step 11: find wind energy turbine set collection bus circuit breaker trip signal? if so, 12 are gone to step; If not, 16 are gone to step;
Step 12: this collection bus has bus? if so, 13 are gone to step; If not, 15 are gone to step;
Step 13: bus is in closure state? if so, go to step 14, if not, go to step 15;
Step 14: disconnect bus, under excising this collection bus, connected all blower fans, go to step 1;
Step 15: connected all blower fans under excising this collection bus, go to step 1;
Step 16: find blower fan feeder breaker trip signal? if not, 1 is gone to step; If so, 17 are gone to step;
Step 17: excise all blower fans on this feeder line, go to step 1.
As shown in Figure 2, be a wind energy turbine set basic topology figure, this wind energy turbine set comprises blower fan 31 altogether, and every seven Fans send wire-outgoing breaker to be connected with a current collection feeder line respectively by blower break device and tower cylinder, and this fan field is totally four current collection feeder lines.Current collection feeder line is connected with collection bus respectively by current collection feeder breaker, has two collection bus in Fig. 2, is respectively between collection bus 1 and collection bus 2 72, two collection bus and is connected by bus 8.Collection bus is connected with 110KV bus through step-up transformer, sends line 3 and grid side circuit breaker 2 is connected to electrical network 1 finally by 110KV.
When protection system starts, monitor each circuit breaker trip signal.
Situation one: if wind energy turbine set current collection feeder line 1 and current collection feeder line 2 102 break down, the system identification of current collection protection for feed line is to fault, and send trip signal to current collection feeder breaker 1 and current collection feeder breaker 2 92, island protect monitors trip signal.
Perform step 2, find Bu Shi cluster main website circuit breaker trip signal;
Perform step 6, find it is not booster stations transformer breaker trip signal;
Perform step 11, find it is not wind energy turbine set bus circuit breaker trip signal;
Perform step 16, discovery is blower fan feeder breaker trip signal.Blower fan now under current collection feeder line 1 and current collection feeder line 2 102 defines two isolated islands.
Perform step 17, island protect system sends sub-gate signal to all blower fans under current collection feeder line 1 and current collection feeder line 2 102, blower fan 1 1011 to blower fan 7 1071 and blower fan 8 1081 to blower fan 15 receive cutting machine signal, sub-gate signal is sent to blower fan circuit breaker 1012 to blower break device 1072 and blower break device 1082 to blower break device 1152, blower break device all disconnects, and completes island protect;
Perform step 1, re-start monitoring.
Situation two: if wind energy turbine set collection bus 1 breaks down, bus 8 is in closure state, and protection system recognizes fault, and send trip signal to collection bus circuit breaker 1, island protect monitors trip signal.
Perform step 2, find Bu Shi cluster main website circuit breaker trip signal;
Perform step 6, find it is not booster stations transformer breaker trip signal;
Perform step 11, discovery is wind energy turbine set collection bus circuit breaker 1 trip signal;
Perform step 12, find that collection bus 1 has bus 8;
Perform step 13, find that bus 8 is in closure state;
Perform step 14, disconnect bus 8, all blower fans now under collection bus 1 form an isolated island.Island protect system sends sub-gate signal to collection bus one 71 times connected all blower fans.Blower fan 1 1011 to blower fan 7 1071 and blower fan 8 1081 to blower fan 15 receive cutting machine signal, sub-gate signal is sent to blower fan circuit breaker 1012 to blower break device 1072 and blower break device 1082 to blower break device 1152, blower break device all disconnects, and completes island protect;
Perform step 1, re-start monitoring.
Situation three: if wind energy turbine set booster stations transformer 1 breaks down, bus 8 is in closure state, each circuit breaker capacity is enough, can not transship.Protection system recognizes booster stations transformer fault, and become electric apparatus circuit breaker 1 to booster stations and send trip signal, island protect monitors trip signal.
Perform step 2, find Bu Shi cluster main website circuit breaker trip signal;
Perform step 6, discovery is booster stations transformer breaker 1 trip signal;
Perform step 7, find that booster stations transformer breaker 1 low-pressure side collection bus 1 has bus 8, and bus 8 is in closure state;
Perform step 8, find that other circuit breaker capacity are enough, can not transship;
Perform step 10, disconnect booster stations transformer 1, its lower blower fan connected can continue to run via bus 8, collection bus 2 72, booster stations transformer 2 52, does not form isolated island.
Perform step 4, island protect is failure to actuate;
Perform step 1, re-start monitoring.
As shown in Figure 3, be a wind-powered electricity generation station cluster topology graph.In this topological diagram, wind energy turbine set one, wind energy turbine set two, wind energy turbine set three and hydroelectric station one are concentrated to 110KV bus six through step-up transformer one to step-up transformer five, 110KV bus one to 110KV bus five, line one to line five respectively.330KV transformer station is connected to via three-winding transformer one and three-winding transformer two.Three-winding transformer one is made up of 330KV side, 110KV side and 35KV side, and three-winding transformer two in like manner can obtain.
When protection system starts, monitor each circuit breaker trip signal.
If break down in the 35KV side of the 330KV side of three-winding transformer one and three-winding transformer two, protection system recognizes fault, and send trip signal to cluster main website circuit breaker, island protect monitors trip signal.
Perform step 2, discovery is cluster main website and 330KV transformation station circuit breaker trip signal;
Performing step 3, finding that the three-winding transformer one of connection cluster main website and three-winding transformer two all disconnect, because which form isolated island;
Perform step 5, disconnect all wind energy turbine set under cluster main website and 330KV transformation station, complete island protect;
Perform step 1, re-start monitoring.
As shown in Figure 4, be that topological diagram is sent in a wind-powered electricity generation station.In this topological diagram, wind energy turbine set one, wind energy turbine set two, wind energy turbine set three and wind energy turbine set four are sent line one to 110KV through 110KV respectively and are sent line four and be connected to 330KV transformer station two, and photovoltaic DC field is sent line five through 330KV and is directly connected to 330KV transformer station two.330KV transformer station two meets 330KV transformer station three through bus one, bus two respectively and connects bus three again and be connected to 330KV transformer station one, is finally connected to major network.
When protection system starts, monitor each circuit breaker trip signal.
If bus one and bus two break down, protection system recognizes fault, and send trip signal to cluster main website and 330KV transformer station one circuit breaker, island protect monitors trip signal.
Perform step 2, discovery is cluster main website and 330KV transformer station one circuit breaker trip signal;
Performing step 3, finding that the circuit of sending connecting cluster main website and 330KV transformer station one all disconnects, because which form isolated island;
Perform step 5, disconnect cluster main website and 330KV transformation station all wind energy turbine set once, complete island protect;
Perform step 1, re-start monitoring.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. the layering for large-scale wind generating divides territory an anti-island protect method, it is characterized in that, comprising:
All circuit breaker trip signals that S1, monitoring are arranged in wind generator system;
S2, judge that cluster main website sends interconnection and whether main transformer all disconnects by cluster main website circuit breaker trip signal, and the isolated island sending interconnection and main transformer because of disconnected cluster main website and all disconnect formation is protected;
S3, judge whether booster stations transformer fault forms isolated island by booster stations transformer breaker trip signal, and the isolated island that booster stations transformer fault is formed is protected;
S4, judge whether wind energy turbine set collection bus fault forms isolated island by wind energy turbine set collection bus circuit breaker trip signal, and the isolated island that wind energy turbine set collection bus fault is formed is protected;
S5, judge whether wind energy turbine set current collection feeder fault forms isolated island by blower fan feeder breaker trip signal, and the isolated island that wind energy turbine set current collection feeder fault is formed is protected.
2. the layering for large-scale wind generating according to claim 1 divides territory anti-island protect method, it is characterized in that,
Above-mentioned S2, judge that cluster main website sends interconnection and whether main transformer all disconnects by cluster main website circuit breaker trip signal, and the isolated island sending interconnection and main transformer because of disconnected cluster main website and all disconnect formation protected, specifically comprise:
S201: whether find cluster main website circuit breaker trip signal, if so, turn S202; If not, S3 is turned;
S202: cluster main website sends interconnection and main transformer all disconnects, and if not, does not then form isolated island, therefore turns S203; If so, then define isolated island, turn S204;
S203: island protect is failure to actuate, turns S1;
S204: excise all blower fans under this clustered control main website; Turn S1.
3. the layering for large-scale wind generating according to claim 2 divides territory anti-island protect method, it is characterized in that,
Above-mentioned S3, judge whether booster stations transformer fault forms isolated island by booster stations transformer breaker trip signal, and the isolated island that booster stations transformer fault is formed protected, specifically comprise:
S301, whether find booster stations transformer breaker trip signal, if so, turn S302; If not, S4 is turned;
S302, judge booster stations transformer connect low-pressure side collection bus and whether have bus, and this bus is in closure state, if having bus and this bus is in closure state, turns S303; If do not have bus or bus not to be be in closure state, turn S305;
S303, judge open failure booster stations transformer after, whether output system can transship, and if so, turns S304; If not, S305 is turned;
Blower fan on S304, excision fault booster stations station transformer lower part feeder line to eliminate overload, and turns S1;
S305, open failure booster stations transformer, turn S4.
4. the layering for large-scale wind generating according to claim 3 divides territory anti-island protect method, it is characterized in that,
Above-mentioned S4, judge whether wind energy turbine set collection bus fault forms isolated island by wind energy turbine set collection bus circuit breaker trip signal, and the isolated island that wind energy turbine set collection bus fault is formed protected, specifically comprise:
S401: whether find wind energy turbine set collection bus circuit breaker trip signal, if so, turn S402; If not, S5 is turned;
S402: whether fault wind energy turbine set collection bus has bus, if so, turns S403, if not, turns S405;
S403: judge whether the bus be connected with fault wind energy turbine set collection bus is in closure state, if so, turns S404, if not, turns S405;
S404: disconnect the bus be connected with fault wind energy turbine set collection bus, connected all blower fans under excision fault wind energy turbine set collection bus, turn S1;
S405: excise connected all blower fans under this fault wind energy turbine set collection bus, turn S1.
5. the layering for large-scale wind generating according to claim 4 divides territory anti-island protect method, it is characterized in that,
Above-mentioned S5, judge whether wind energy turbine set current collection feeder fault forms isolated island by blower fan feeder breaker trip signal, and the isolated island that wind energy turbine set current collection feeder fault is formed protected, specifically comprise:
S501: find blower fan feeder breaker trip signal, if not, turn S1, if so, turn S502;
S502: all blower fans on excision fault wind energy turbine set current collection feeder line, turn S1.
CN201510824628.8A 2015-11-24 2015-11-24 Layering for large-scale wind power generation divides domain anti-isolated island guard method Expired - Fee Related CN105391033B (en)

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