CN105978017B - There is the method for detecting and protecting isolated island of anti-jump function for large-scale wind power - Google Patents

There is the method for detecting and protecting isolated island of anti-jump function for large-scale wind power Download PDF

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Publication number
CN105978017B
CN105978017B CN201510822693.7A CN201510822693A CN105978017B CN 105978017 B CN105978017 B CN 105978017B CN 201510822693 A CN201510822693 A CN 201510822693A CN 105978017 B CN105978017 B CN 105978017B
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node
isolated island
storehouse
trip signal
counter
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CN105978017A (en
Inventor
路亮
汪宁渤
丁坤
胡家兵
李晓龙
周识远
黄璐涵
李津
陈家乐
冉亮
熊雪君
孙辰军
韩自奋
罗真
摆念宗
王永
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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
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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
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/386Wind energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388Islanding, i.e. disconnection of local power supply from the network
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects

Abstract

The invention discloses a kind of method for detecting and protecting isolated island for large-scale wind power with anti-jump function, including:The step of initializing node type table and node connection table;The circuit breaker trip signal in power grid is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, while the step of starting anti-theft mode hopping block;And according to updated node connection table, the step of judging whether to form isolated island.Isolated island detection and the protection of anti-isolated island are carried out, is had quickly in mains side high pressure major network for large-scale wind electricity generation system, accurately, efficiently, safe and stable advantage.Technical solution of the present invention does not consider circuit weight simultaneously, can faster carry out anti-isolated island protection act.

Description

There is the method for detecting and protecting isolated island of anti-jump function for large-scale wind power
Technical field
The present invention relates to the anti-isolated islands of large-scale wind power generation to protect field, and in particular, to one kind being directed to large-scale wind power Method for detecting and protecting isolated island with anti-jump function.
Background technology
Large Scale Wind Farm Integration(Base)Island state refers to Large Scale Wind Farm Integration(Base)In, part Wind turbines are detached from major network Afterwards, continue the operating status powered to its lower institute on-load.In large-scale wind electricity generation system, isolated island is effectively and timely detected It is of great significance to Wind turbines and local load.Large-scale wind power accesses in the principle that isolated island causes and situation and distribution Isolated island is different, so, the harm that isolated island occurs for large-scale wind power access also has not compared with harm of the isolated island in distribution Together.First, after isolated island occurs for large-scale wind power access, power quality is also uncontrollable.But even more serious threat is, Overvoltage problem in islanded system.
Cause Large Scale Wind Farm Integration(Base)Have the reason of overvoltage in islanded system very much, summary summarizes, and has as follows It is several:1)Under some failure situations, islanded system loses system earth;Wind turbine generally by step-up transformer central point Acquisition system zero, when feeder fault, wind turbine and feeder line lose system earth, and non-faulting phase voltage rises to 1.73 times of failure Preceding phase voltage, principle are as shown in Figure 1.2)The distinctive fault characteristic of wind turbine, fan converter are usually to carry out current control, wind Machine is boosted by transformer step by step, and wind turbine is also required to send electric energy to booster stations by longer current collection feeder line, is herein There are larger reactance in system, system impedance is big, and electromagnetic environment is complex, suddenly under power-off, will produce larger transient state Overvoltage.3)Islanded system is time-dependent system, and its damping is smaller, will produce larger transient overvoltage.4)If in weight When combined floodgate starts, system does not power off yet, it may appear that surge voltage, more serious situation are that non-synchronous reclosing occurs, at this moment, will It will appear prodigious transient overvoltage.
Currently, common power distribution network island detection method is broadly divided into three classes:(1)Passive detection method;(2)Active detecting Method;(3)Detection method based on signal of communication.
The one or more power grid electrical quantity of passive detection method monitoring, according to electrical quantity and the direct deviation of set threshold value, It can be determined that whether interest region occurs island operation state.Generally by finding frequency, voltage or the abnormal number at phase angle Multiple factor of judgment such as anomalous variation of harmonic wave in value or detecting system can determine the presence of isolated island after comprehensive analysis.
The advantages of passive detection method, is, since the control strategy of gird-connected inverter itself just needs to detect terminal voltage, This method need not increase additional hardware circuit or independent protective relay;It is noiseless to power grid, to power quality without shadow It rings;Under more inverters, detection efficiency will not reduce.Its problem is non-detection region(Non-Detection Zone, NDZ)It is possible that quite big, threshold threshold value is difficult to set, and has both been higher than value when normal operation, is less than value when isolated island again. In order to reduce NDZ, the sensitivity of device is often improved, but equipment fault-free trip can be caused, influences the normal operation of system;At certain In the case of some specific, NDZ is very big;Certain parameters cannot be measured directly, need complicated calculating that can just obtain, and calculate error And the calculating time also will produce detection result influence.
Active detecting method is injecting voltage, frequency or phase angle in power grid, to cause network voltage, frequency or phase The disturbance of parallactic angle, power distribution network when these disturbances are for grid-connected state, due to being clamped down on by the balance of major network, disturbing signal Act on unobvious;But when isolated island occurs, these perturbation actions, can be by checking points of common connection with regard to more apparent(PCC)'s System responds, to determine whether isolated island occurs.
The advantages of active detecting method, is that NDZ is smaller, and accuracy of detection is higher, can accurately detect isolated island.The method The shortcomings that be due to introducing disturbance quantity, cause power grid power quality to decline and the unnecessary transient response of power grid;Control is calculated Method is more complex, and practical application is difficult;Under different load characteristics, there is very big difference in detection result, even fail when serious.
State is cut-off based on what the detection method of signal of communication detected breaker using wired or wireless communication mode, According to the variation of circuit-breaker status determine whether that isolated island has occurred.
Detection method advantage based on signal of communication:Detection zone nothing but(NDZ), detection it is accurate and reliable;For single or more The isolated island detection of a inverter is all effective;Its performance is unrelated with the type of DG devices, will not be made to the normal operation of power grid At interference, therefore it is very reliable island detection method.This method disadvantage:It needs to add equipment, cost of implementation is high, and operation is multiple It is miscellaneous, need many certifications, economy low.
Current main method is all the progress isolated island detection in low-voltage network, for the height electricity of large-scale wind power generation The isolated island of pressure grade detects and has no pertinent literature.Currently, existing power distribution network isolated island detection related patents be broadly divided into it is as follows Several classes:
Passive detection method:
The patent of Patent No. 201510084241.3 proposes a kind of anti-isolated island protection of novel photovoltaic plant passive type Method.The method is applied to large-scale photovoltaic power station and concentrates the substation that is connected to the grid, and passes through and calculates power frequency fault impedance and power Factor changes, and through impedance criterion and power factor criterion, it is individually load carrying small whether comprehensive descision photovoltaic plant occurs Isolated island and photovoltaic plant and substation load carrying big isolated island together, once detecting isolated island, tripping is accordingly grid-connected immediately Switch, to protect the safety of operating maintenance personnel and equipment.This method belongs to passive detection method, and is research pair with photovoltaic plant As.
Active detecting method:
The patent of Patent No. 201410221942.2 provides a kind of Wind turbines isolated island test method.By an isolated island Generating means is connected between Wind turbines outlet transformer and wind power plant step-up transformer, is made by adjusting isolated island generating means Wind turbines are in island state, and detect Wind turbines grid entry point three-phase current, three-phase voltage and the grid-connected switch of Wind turbines Status signal, investigates whether Wind turbines have island operating capacity, and the off-grid time under anti-isolated island.This method belongs to main Dynamic detection method.
The patent of Patent No. 201410741339.7 proposes a kind of anti-isolated island experiment detection device of photovoltaic and detection side Method.This anti-isolated island experiment detection device, by host computer, more than one Intelligent power monitoring module, I/O relay control panels, Telegraph key K and adjustable RLC load blocks composition can carry out island effect test to the large copacity power supplies class equipment such as photovoltaic plant.It is logical Offered load module is crossed, detects grid-connected voltage V to judge whether island phenomenon occurs.This method belongs to active method of testing, and belongs to In the anti-isolated island detection of photovoltaic plant.
The patent of Patent No. 201510037485.6 proposes a kind of the grid-connected of distributed power supply system isolated island effect prevention Switch protection method and grid-connected switching device.The method is that the active carried out for the distributed power supply system of distribution net side is protected Shield to certain disturbances of injections such as its output power, frequency or phases, while detecting inverter by controlling gird-connected inverter Output situation;When power grid works normally, due to the balanced action of power grid, disturbing signal is not enough to change gird-connected inverter Output characteristics;When electric network fault or power down, due to the feedback effect of disturbing signal, the output characteristics of gird-connected inverter is just Understand accelerated accumulation and exceed allowable range, generates the protective device that a signal triggers grid-connected switch, make its tripping.This method pair Low-voltage network carries out anti-isolated island detection.
The patent of Patent No. 201510242085.9 proposes a kind of anti-isolated island protection based on constant impedance load simulation Test circuit and method.The part throttle characteristics that parallel connection RLC loads are accurately simulated with constant impedance load simulation unit, by grid-connected photovoltaic The active power of inverter output is fed to power distribution network with unity power factor, it is ensured that it is inverse to trigger grid-connected photovoltaic during the test Become the anti-isolated island protection of device.This method belongs to active detecting method.
Detection method based on signal of communication:
The patent of Patent No. 201180043345.X proposes a kind of for detecting low pressure(LV)Isolated island in electric power networks The method of situation, this method is in the network of Multi- Switch signal, by detecting the position signal of network interruption road device, and with it is true Value table is compared, and using the method tabled look-up, and the method by disconnecting power electrical unit protects system.This method needle Isolated island detection is carried out to power distribution network, while this method uses less efficient look-up table.
The patent of Patent No. 201210124330.2 provides a kind of isolated island guard method of station domain and a kind of station domain isolated island Protection system, by obtaining the location information in substation region with the generation relevant breaker of island operation state, judgement is It is no island operation state occur, and isolated island protection act can be completed by a breaker at tripping electricity generation system networking. This method needle carries out isolated island detection in substation's range, and realizes orphan using a breaker at tripping electricity generation system networking Island is protected, and this method is not particularly suited for the anti-isolated island protection of large-scale wind electricity generation system, is since large-scale wind generates electricity System, the electrical distance of each wind turbine to wind power plant primary substation is longer, the overvoltage of wind turbine feeder line can be caused to ask using this method Topic, to influence the service life of wind turbine.
The patent of Patent No. 201310039649.X provides a kind of distributed power generation grid-connected system anti-isolated island protection system System and its guard method are based on carrier communication and decentralized detection technology, and the information that grid side is obtained by upper carrier terminal equipment carries out Isolated island differentiates and the next carrier terminal equipment controls the grid entry point switch of user side distributed generation resource, cuts off distributed generation resource, prevents The only generation of island effect improves reliability and the safety of distributed power generation grid-connected system.This method is directed to distributed power generation System carries out anti-isolated island protection, is not related to the anti-isolated island protection of extensive centralized wind-power electricity generation.
The patent of Patent No. 201310086985.X provides a kind of switch changed position isolated island detection based on Wide-area Measurement Information And formula isolated island guard method of directly tripping.During distributed power supply system is incorporated into the power networks, FTU is installed on each switch(Feedback Line automation terminal), FTU detects the status information of each switch in real time, according to the folding condition judgement of isolated island association switch Whether islet operation is occurred.For judging the distributed generation resource in islet operation, the FTU in the distributed generation resource exit is just Ground sends out the order of isolated island protection, this exit DG is switched and is disconnected, keeps its out of service.This method is directed to distributed power generation System carries out anti-isolated island protection, is not related to the anti-isolated island protection of extensive centralized wind-power electricity generation.
The patent of Patent No. 201310404177.3 discloses a kind of with low voltage crossing and anti-isolated island defencive function Photovoltaic power station system, by checking the switching signal of grid circuit breaker, voltage signal v and frequency signal f pass through controller Judgement, and by controlling the first breaker, realize isolated island judgement and anti-isolated island defencive function, and pass through and three-phase inversion is set Device realizes the function of low voltage crossing, to which low voltage crossing and anti-isolated island defencive function coexist, has reached enhancing photovoltaic The purpose of electric power station system stability and safety.This method carries out anti-isolated island protection for photovoltaic generating system, is not related to big The anti-isolated island of scale land management formula wind-power electricity generation is protected.
The patent of Patent No. 201310560121.7 provides a kind of anti-islet operation system of more plant-grid connection substations. It can fast and accurately pass through judgement for when line fault, main transformer failure and bus-bar fault occurring in 110kV substations region The position of the switch cuts off grid-connected small power supply, avoids that islet operation occurs, damages user's electrical equipment and system irregular operation. This method carries out anti-isolated island protection for photovoltaic generating system, and the anti-isolated island for being not related to extensive centralized wind-power electricity generation is protected Shield.
The patent of Patent No. 201320048498.X provides a kind of intelligence RLC loads and anti-circuit for detecting island, can The anti-isolated island function of accurate detection user side grid power source.Pass through intelligent RLC load simulations user side power consumption, waveform recording Instrument records inverter output current and grid-connected current signal, judges whether island effect occurs and evaluate the anti-of DC-AC inverter Isolated island protective value.This method carries out isolated island detection in user side low-voltage network, is not related in Generation Side high pressure major network Carry out isolated island detection.
The patent of Patent No. 201410521937.3 provides a kind of anti-isolated island protection of substation areas of transformer station and prepared auto restart one Body method.The electric quantity information and switching-state information of acquisition substation's high, medium and low voltage side in real time, is overhauled in conjunction with prepared auto restart Whether pressing plate puts into or exits, to identify the current operating status of substation's high, medium and low voltage side element;According to physical cabling feelings Condition and live operation demand select the backup power automatic switching function of high, medium and low voltage side and the protection of anti-isolated island to be by apparatus function pressing plate No opening;By device software control setting high, medium and low voltage side for throwing mode, and with identify before high, medium and low voltage side member The operating status of part is matched, if mismatched, sends out alarm signal, device locking electric discharge.This method has anti-isolated island protection Function can detect rapidly existing island state and isolated island range in substation, and the photovoltaic plant in tripping respective range Grid-connected switch.This method carries out isolated island detection just for substation's range, is not related to carry out isolated island inspection in large-scale wind electricity base It surveys.
Paper is lonely for user side low-voltage network " based on the distributed power generation isolated island division methods for improving Prim algorithms " Island problem proposes a kind of minimal spanning tree algorithm progress isolated island division based on prim methods, and this method is not related to mains side High pressure major network carries out anti-isolated island detection, while because needing to consider circuit weight, therefore the delay of anti-isolated island protection act is larger.
Invention content
It is an object of the present invention in view of the above-mentioned problems, propose that a kind of large-scale wind power that is directed to has anti-jump function Method for detecting and protecting isolated island, it is quick to realize, accurately, and efficiently, safe and stable advantage.
To achieve the above object, the technical solution adopted by the present invention is:
A kind of method for detecting and protecting isolated island for large-scale wind power with anti-jump function, including:
The step of initializing node type table and node connection table;
The circuit breaker trip signal in power grid is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, The step of starting anti-theft mode hopping block simultaneously;
And
According to updated node connection table, the step of judging whether to form isolated island.
Preferably, the initialization node type table and the step of node connection table, specially:
Step 1, initialization node type table:If sharing n node in network, the generating set in network is initialized as 1, load bus is initialized as 2, the root node in monitoring network is set as 3, remaining node is set as 0, wherein be initialized as 1 or 2 Node be fringe node, be initialized as 0 node be internal node;
Initialize node connection table:For including the network of n node, for any two node A and B, if A, B two is saved There is 1 power circuit connection between point and circuit is in connection status, then A rows B row set 1 in table, there are two to be then set to 2, if A, B two Unregulated power connection or connection line are off between node, then A rows B row are set to 0 in table.
Preferably, the circuit breaker trip signal in the monitoring power grid, and according to the circuit breaker trip signal update of monitoring Node connection table, while the step of starting anti-theft mode hopping block, specifically include:
Step 2:The circuit breaker trip signal in power grid is monitored, while starting anti-theft mode hopping block;
Step 3:Whether circuit breaker trip signal is found, if without trip signal, return to step 2, if monitoring trip signal Enter step 4;
Step 4:More new node connection table initializes output node storehouse, and empties output node storehouse;
Step 5:Trip signal storehouse is initialized, trip signal storehouse is emptied;Trip signal counter is initialized, and Counter is set to 0;
Step 6:Circuit breaker trip signal is pressed into trip signal storehouse one by one, and is remembered by trip signal counter Record the number of trip signal.
Preferably, circuit breaker trip signal is pressed into trip signal storehouse and is specially by the step 6 one by one:
If the breaker of connection two nodes of A, B trips, if node A arrives the distance of root node more than node B distances Far, then by d(A, B)Signal is pressed into trip signal storehouse, it is on the contrary then by d(B, A)It is pressed into trip signal storehouse.
Preferably, start anti-theft mode hopping block in the step 2, specially:Start thread and carry out anti-jump detection, if hair Existing node jump handles jump using interrupt mode, and saving scene, preferred process jump event, jump event handling are complete Cheng Hou, restoring scene continue with anti-isolated island protection event.
Preferably, described according to updated node connection table, the step of judging whether to form isolated island, specifically includes:
Step 7:Judge whether trip signal in trip signal counter is more than 0, it is no, go to step 2;It is to turn step Rapid 8;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node storehouse is initialized, isolated island node storehouse is emptied;
Step 10:A trip signal, trip signal counter -1 are popped up from trip signal storehouse;
Step 11:The corresponding node of the trip signal of above-mentioned pop-up is pressed into isolated island node storehouse, isolated island node number meter Number device+1;
Step 12:A node, isolated island node number counter -1 are popped up from isolated island node storehouse
Step 13:Judge whether the node is root node according to updated node state table, if root node, goes to step 14;It is no, then go to step 15;
Step 14:Isolated island node storehouse is emptied, isolated island node number counter is emptied, goes to step 7;
Step 15:By the node popped up from isolated island node storehouse and the node in trip signal storehouse one by one compared with whether It is identical, if it is different, and going to step 17;If having identical, 16 are gone to step;
Step 16:After rejecting the same node point in trip signal storehouse, remaining node is pushed back into trip signal storehouse;
Step 17:Can node state table in the updated find and the node unicom that is popped up from isolated island node storehouse Node, can, then 18 are gone to step, otherwise goes to step 19;
Step 18:Assuming that shared m node and the node unicom popped up from isolated island node storehouse, it will be a with the m of unicom Node is pressed into isolated island node storehouse, while by isolated island node number counter+m;Go to step 12;
Step 19:The node popped up from isolated island node storehouse is pressed into output node storehouse;
Step 20:Judge whether isolated island node counter is 0, if it is not, then going to step 12;If so, going to step 21;
Step 21:All nodes in output node storehouse are popped up, all nodes composition output in output node storehouse Node set;
Step 22:Judge whether contain power supply and load bus simultaneously in output node set, if going to step 23;If not Go to step 24;
Step 23:Output node collection is combined into isolated island, goes to step 7;
Step 24:Output node set is not isolated island, abandons the output node set, goes to step 7;
Step 25:Anti- isolated island is carried out in conjunction with node type table for all isolated island nodes in each isolated island of output Machine operation is cut in protection.
Technical scheme of the present invention has the advantages that:
Technical scheme of the present invention carries out isolated island detection for large-scale wind electricity generation system in mains side high pressure major network And anti-isolated island protection, have quickly, accurately, efficiently, safe and stable advantage.Technical solution of the present invention does not consider circuit simultaneously Weight can faster carry out anti-isolated island protection act.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Description of the drawings
Fig. 1 is non-faulting phase voltage elevated view in the case of existing singlephase earth fault;
Fig. 2 is isolated island detection and the protection side for large-scale wind power with anti-jump function described in the embodiment of the present invention Method flow chart;
Fig. 3 is the power grid connection diagram described in the embodiment of the present invention.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
As shown in Fig. 2, a kind of method for detecting and protecting isolated island for large-scale wind power with anti-jump function, including:
The step of initializing node type table and node connection table;
The circuit breaker trip signal in power grid is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, The step of starting anti-theft mode hopping block simultaneously;
And
According to updated node connection table, the step of judging whether to form isolated island.
Preferably, the step of initializing node type table and node connection table, specially:
Step 1, initialization node type table:If sharing n node in network, the generating set in network is initialized as 1, load bus is initialized as 2, the root node in monitoring network is set as 3, remaining node is set as 0, wherein be initialized as 1 or 2 Node be fringe node, be initialized as 0 node be internal node;
Initialize node connection table:For including the network of n node, for any two node A and B, if A, B two is saved There is 1 power circuit connection between point and circuit is in connection status, then A rows B row set 1 in table, there are two to be then set to 2, if A, B two Unregulated power connection or connection line are off between node, then A rows B row are set to 0 in table.
Preferably, the circuit breaker trip signal in power grid is monitored, and according to the circuit breaker trip signal update node of monitoring Connection table, while the step of starting anti-theft mode hopping block, specifically include:
Step 2:The circuit breaker trip signal in power grid is monitored, while starting anti-theft mode hopping block;
Step 3:Whether circuit breaker trip signal is found, if without trip signal, return to step 2, if monitoring trip signal Enter step 4;
Step 4:More new node connection table initializes output node storehouse, and empties output node storehouse;
Step 5:Trip signal storehouse is initialized, trip signal storehouse is emptied;Trip signal counter is initialized, and Counter is set to 0;
Step 6:Circuit breaker trip signal is pressed into trip signal storehouse one by one, and is remembered by trip signal counter Record the number of trip signal.
Preferably, circuit breaker trip signal is pressed into trip signal storehouse and is specially by step 6 one by one:
If the breaker of connection two nodes of A, B trips, if node A arrives the distance of root node more than node B distances Far, then by d(A, B)Signal is pressed into trip signal storehouse, it is on the contrary then by d(B, A)It is pressed into trip signal storehouse.
Preferably, start anti-theft mode hopping block in step 2, specially:Start thread and carry out anti-jump detection, if it find that having Node jump handles jump using interrupt mode, and saving scene, preferred process jump event, after the completion of jump event handling, Restoring scene continues with anti-isolated island protection event.
Preferably, according to updated node connection table, the step of judging whether to form isolated island, specifically includes:
Step 7:Judge whether trip signal in trip signal counter is more than 0, it is no, go to step 2;It is to turn step Rapid 8;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node storehouse is initialized, isolated island node storehouse is emptied;
Step 10:A trip signal, trip signal counter -1 are popped up from trip signal storehouse;
Step 11:The corresponding node of the trip signal of above-mentioned pop-up is pressed into isolated island node storehouse, isolated island node number meter Number device+1;
Step 12:A node, isolated island node number counter -1 are popped up from isolated island node storehouse
Step 13:Judge whether the node is root node according to updated node state table, if root node, goes to step 14;It is no, then go to step 15;
Step 14:Isolated island node storehouse is emptied, isolated island node number counter is emptied, goes to step 7;
Step 15:By the node popped up from isolated island node storehouse and the node in trip signal storehouse one by one compared with whether It is identical, if it is different, and going to step 17;If having identical, 16 are gone to step;
Step 16:After rejecting the same node point in trip signal storehouse, remaining node is pushed back into trip signal storehouse;
Step 17:Can node state table in the updated find and the node unicom that is popped up from isolated island node storehouse Node, can, then 18 are gone to step, otherwise goes to step 19;
Step 18:Assuming that shared m node and the node unicom popped up from isolated island node storehouse, it will be a with the m of unicom Node is pressed into isolated island node storehouse, while by isolated island node number counter+m;Go to step 12;
Step 19:The node popped up from isolated island node storehouse is pressed into output node storehouse;
Step 20:Judge whether isolated island node counter is 0, if it is not, then going to step 12;If so, going to step 21;
Step 21:All nodes in output node storehouse are popped up, all nodes composition output in output node storehouse Node set;
Step 22:Judge whether contain power supply and load bus simultaneously in output node set, if going to step 23;If not Go to step 24;
Step 23:Output node collection is combined into isolated island, goes to step 7;
Step 24:Output node set is not isolated island, abandons the output node set, goes to step 7;
Step 25:Anti- isolated island is carried out in conjunction with node type table for all isolated island nodes in each isolated island of output Machine operation is cut in protection.
As shown in figure 3, being connected for somewhere power grid, interior joint 1 becomes for the Dunhuang 750kV, and node 2 becomes for the Yumen 330kV, Node 3 is the Yumen 110kV town substation, and node 4 is that the traction of the Yumen 110kV town becomes, and node 5 becomes for 110kV Yanguan Pass, and node 6 is The Guazhou County 110kV gas pressure station, node 7 are the Anxis 110kV oil transportation station, and node 8-10 is 3 feedbacks of the prosperous horse east 48MW wind power plants of Datang Line, node 11-14 are 4 feeder lines of clean source 71MW wind power plants.
It is connected in conjunction with above-mentioned power grid, the method for the present invention is described as follows:
Step 1:Initialize node type table
Include 14 nodes in total in the network, node type table is as shown in table 1:
Table 1, node type table.
Node connection table is as shown in table 2:
Table 2, node connection table.
Step 2:The circuit breaker trip signal in power grid is monitored, while starting anti-theft mode hopping block;System enters circulatory monitoring Stage.
Step 3:Whether circuit breaker trip signal is found;Currently, monitoring No. 3 Yumen node 110kV town substation open circuits Device, No. 5 node 110kV Yanguan Pass transformer breakers and No. 6 Guazhou County node 110kV compressor station two-wires find circuit breaker trip signal.
Step 4:More new node connection table, and output node storehouse is initialized, and empty;Updated node connection table is such as Shown in table 3:
Table 3, updated node connection table.
Step 5:Trip signal storehouse is initialized, storehouse is emptied;Trip signal counter is initialized, and is set to 0;
Step 6:Circuit breaker trip signal is pressed into trip signal storehouse one by one, and records the number of trip signal;By d (3,2),d(5,2)And d(6,5)It is pressed into storehouse;Trip signal number is 3;
Step 7:Judge whether trip signal is more than 0, judging result is more than 0;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node storehouse is initialized, storehouse is emptied;
Step 10:A trip signal, trip signal counter -1 are popped up from trip signal storehouse;At this point, pop-up d (6,5), trip signal counter is 2;
Step 11:The corresponding node of the trip signal is pressed into isolated island node storehouse, isolated island node number counter+1;Section 6 indentation isolated island node storehouse of point, isolated island node number counter is 1;
Step 12:A node, isolated island node number counter -1 are popped up from isolated island node storehouse;Isolated island node storehouse It is hit by a bullet egress 6, isolated island node number counter is 0;
Step 13:Judge whether the node is root node according to node state tableThe node is not root node,
Step 15:With the node in the node storehouse that trips one by one compared with it is whether identicalThere are 2 in tripping node storehouse Node be currently all different;All nodes push back isolated island node storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomIt is no, go to step 19;
Step 19:The node is pressed into output node storehouse;
Step 20:Whether isolated island node counter is 0It is then to go to step 21;
Step 21:Pop up all nodes in " output node storehouse ";
Step 22:Judge whether contain power supply and load bus in output node set simultaneously, it is no, go to step 24;
Step 24:Output node set is not isolated island, abandons the set, goes to step 7;
Step 7:Judge whether trip signal is more than 0, judging result is more than 0;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node storehouse is initialized, storehouse is emptied;
Step 10:A trip signal, trip signal counter -1 are popped up from trip signal storehouse;At this point, pop-up d (5,2), trip signal counter is 1;
Step 11:The corresponding node of the trip signal is pressed into isolated island node storehouse, isolated island node number counter+1;Section 5 indentation isolated island node storehouse of point, isolated island node number counter is 1;
Step 12:A node, isolated island node number counter -1 are popped up from isolated island node storehouse;Isolated island node storehouse It is hit by a bullet egress 5, isolated island node number counter is 0;
Step 13:Judge whether the node is root node according to node state tableThe node is not root node;
Step 15:With the node in the node storehouse that trips one by one compared with it is whether identicalThere is 1 in tripping node storehouse Node be currently all different;All nodes push back storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomIt is to go to step 18;
Step 18:Node 7 and node 11-14 totally 5 nodes unicom therewith, will be pressed into heap with 5 nodes of the node unicom Stack, while being 5 by isolated island node number counter, go to step 12;
Step 12:A node is popped up from isolated island node storehouse, pops up node 7, and isolated island node number counter is 4;
Step 13:Judge whether the node is root node according to node state tableIt is no, then go to step 15;
Step 15:With the node in trip signal storehouse one by one compared with it is whether identicalIt is after node is popped up one by one and current Node is compared, and different, then all nodes push back trip signal storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomOtherwise 19 are gone to step;
Step 19:The node is pressed into output node storehouse;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is popped up from isolated island node storehouse, pops up node 11, isolated island node number counter 3;
Step 13:Judge whether the node is root node according to node state tableIt is no, then go to step 15;
Step 15:With the node in trip signal storehouse one by one compared with it is whether identicalIt is after node is popped up one by one and current Node is compared, and different, then all nodes push back storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomOtherwise 19 are gone to step;
Step 19:The node is pressed into output node storehouse;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is popped up from isolated island node storehouse, pops up node 12, isolated island node number counter 2;
Step 13:Judge whether the node is root node according to node state tableIt is no, then go to step 15;
Step 15:With the node in trip signal storehouse one by one compared with it is whether identicalIt is after node is popped up one by one and current Node is compared, and different, then all nodes push back storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomOtherwise 19 are gone to step;
Step 19:The node is pressed into output node storehouse;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is popped up from isolated island node storehouse, pops up node 13, isolated island node number counter 1;
Step 13:Judge whether the node is root node according to node state tableIt is no, then go to step 15;
Step 15:With the node in trip signal storehouse one by one compared with it is whether identicalIt is after node is popped up one by one and current Node is compared, and different, then all nodes push back storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomOtherwise 19 are gone to step;
Step 19:The node is pressed into output node storehouse;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is popped up from isolated island node storehouse, pops up node 14, isolated island node number counter 0;
Step 13:Judge whether the node is root node according to node state tableIt is no, then go to step 15;
Step 15:With the node in trip signal storehouse one by one compared with it is whether identicalIt is after node is popped up one by one and current Node is compared, and different, then all nodes push back storehouse again, and go to step 17;
Step 17:The node that can be found and currently pop up node unicomOtherwise 19 are gone to step;
Step 19:The node is pressed into output node storehouse;
Step 20:Whether isolated island node counter is 0It is then to go to step 21;
Step 21:Pop up all nodes in " output node storehouse ";
Step 22:Judge whether contain power supply and load bus simultaneously in output node set, is to go to step 23;
Step 23:Output node set 7,11,12,13,14 is isolated island, goes to step 7;
It is isolated island that can obtain output node set 3,4,8,9,10 with same operating procedure.
2 isolated islands are detected in the embodiment altogether.
Step 25:For detecting all isolated island nodes in 2 isolated island each isolated islands, in conjunction with node type table, into Machine operation is cut in the anti-isolated island protection of row.
Anti- jump detection module by detect circuit voltage, electric current or electric signal, monitoring breaker whether jump, i.e., Circuit breaker trip is equipped with anti-theft in the network system of anti-isolated island protection without signaling to control centre on every circuit Jump detection module.
In above-described embodiment, the implementation of anti-jump detection module is detected all breakers, when detecting open circuit When device tripping jump, no matter anti-isolated island protection at this time proceeds to which step in step 1 to step 25, it is necessary under stopping Come, preferably progress jump event, i.e., after the jump node that anti-jump detection module detects, is transferred in above-mentioned steps 4 and carries out Processing returns again to the step of original anti-isolated island protection carries out after having judged whether the jump node forms isolated island.
Finally it should be noted that:The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's Within protection domain.

Claims (2)

1. a kind of method for detecting and protecting isolated island for large-scale wind power with anti-jump function, which is characterized in that including:
The step of initializing node type table and node connection table;
The circuit breaker trip signal in power grid is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, simultaneously The step of starting anti-theft mode hopping block;
And
According to updated node connection table, the step of judging whether to form isolated island;
Wherein, the circuit breaker trip signal in the monitoring power grid, and connected according to the circuit breaker trip signal update node of monitoring Table is connect, while the step of starting anti-theft mode hopping block, specifically included:
Step 2:The circuit breaker trip signal in power grid is monitored, while starting anti-theft mode hopping block, starts anti-jump in the step 2 Module, specially:Start thread and carry out anti-jump detection, if it find that there is node jump, jump is handled using interrupt mode, and Saving scene, preferred process jump event, after the completion of jump event handling, restoring scene continues with anti-isolated island protection event;
Step 3:Whether circuit breaker trip signal is found, if without trip signal, return to step 2, if monitoring, trip signal enters Step 4;
Step 4:More new node connection table initializes output node storehouse, and empties output node storehouse;
Step 5:Trip signal storehouse is initialized, trip signal storehouse is emptied;Trip signal counter is initialized, and will meter Number device is set to 0;
Step 6:Circuit breaker trip signal is pressed into trip signal storehouse one by one, and is jumped by trip signal number counter records Circuit breaker trip signal is pressed into trip signal storehouse and is specially by the number of lock signal, the step 6 one by one:
If the breaker of connection two nodes of A, B trips, if node A more farther than the distance of node B distance to root node, By d(A, B)Signal is pressed into trip signal storehouse, it is on the contrary then by d(B, A)It is pressed into trip signal storehouse;
It is described according to updated node connection table, the step of judging whether to form isolated island, specifically includes:
Step 7:Judge whether trip signal in trip signal counter is more than 0, it is no, go to step 2;It is to go to step 8;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node storehouse is initialized, isolated island node storehouse is emptied;
Step 10:A trip signal, trip signal counter -1 are popped up from trip signal storehouse;
Step 11:The corresponding node of the trip signal of above-mentioned pop-up is pressed into isolated island node storehouse, isolated island node number counter+ 1;
Step 12:A node, isolated island node number counter -1 are popped up from isolated island node storehouse;
Step 13:Judge whether the node is root node according to updated node state table, if root node, goes to step 14; It is no, then go to step 15;
Step 14:Isolated island node storehouse is emptied, isolated island node number counter is emptied, goes to step 7;
Step 15:By the node popped up from isolated island node storehouse and the node in trip signal storehouse one by one compared with whether phase Together, if it is different, and going to step 17;If having identical, 16 are gone to step;
Step 16:After rejecting the same node point in trip signal storehouse, remaining node is pushed back into trip signal storehouse;
Step 17:Can node state table in the updated find the section with the node unicom popped up from isolated island node storehouse Point, can, then 18 are gone to step, otherwise goes to step 19;
Step 18:Assuming that shared m node and the node unicom popped up from isolated island node storehouse, by the m node with unicom It is pressed into isolated island node storehouse, while by isolated island node number counter+m;Go to step 12;
Step 19:The node popped up from isolated island node storehouse is pressed into output node storehouse;
Step 20:Judge whether isolated island node counter is 0, if it is not, then going to step 12;If so, going to step 21;
Step 21:All nodes in output node storehouse are popped up, all nodes in output node storehouse form output node Set;
Step 22:Judge whether contain power supply and load bus simultaneously in output node set, if going to step 23;Turn to walk if not Rapid 24;
Step 23:Output node collection is combined into isolated island, goes to step 7;
Step 24:Output node set is not isolated island, abandons the output node set, goes to step 7;
Step 25:Anti- isolated island protection is carried out in conjunction with node type table for all isolated island nodes in each isolated island of output Cut machine operation.
2. the method for detecting and protecting isolated island for large-scale wind power with anti-jump function according to claim 1, It is characterized in that, the step of the initialization node type table and node connection table, specially:
Step 1, initialization node type table:If sharing n node in network, the generating set in network is initialized as 1, is born Lotus node initializing is 2, the root node in monitoring network is set as 3, remaining node is set as 0, wherein be initialized as 1 or 2 section Point is fringe node, and the node for being initialized as 0 is internal node;
Initialize node connection table:For including the network of n node, for any two node A and B, if between two node of A, B There is 1 power circuit connection and circuit is in connection status, then A rows B row set 1 in table, there are two to be then set to 2, if two node of A, B Between unregulated power connection or connection line be off, then A rows B row are set to 0 in table.
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