CN105375520B - There is the island detection method of anti-jump function for large-scale wind power - Google Patents

There is the island detection method of anti-jump function for large-scale wind power Download PDF

Info

Publication number
CN105375520B
CN105375520B CN201510823832.8A CN201510823832A CN105375520B CN 105375520 B CN105375520 B CN 105375520B CN 201510823832 A CN201510823832 A CN 201510823832A CN 105375520 B CN105375520 B CN 105375520B
Authority
CN
China
Prior art keywords
node
queue
isolated island
trip signal
island
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201510823832.8A
Other languages
Chinese (zh)
Other versions
CN105375520A (en
Inventor
路亮
汪宁渤
丁坤
胡家兵
周识远
李晓龙
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
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 CN201510823832.8A priority Critical patent/CN105375520B/en
Publication of CN105375520A publication Critical patent/CN105375520A/en
Application granted granted Critical
Publication of CN105375520B publication Critical patent/CN105375520B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 island detection method 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 network is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, and the step of node corresponding to circuit breaker trip signal is pushed into queue;And logic judgment is carried out according to the node connection table after renewal and queue, so as to judge node corresponding to circuit breaker trip signal no the step of forming isolated island.For large-scale wind electricity generation system, in mains side high pressure major network, carry out isolated island detection and the protection of anti-isolated island, have it is quick, accurately, efficiently, it is safe and stable the advantages of.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 island detection method of anti-jump function for large-scale wind power
Technical field
The present invention relates to the anti-isolated island protection field of large-scale wind generating, in particular it relates to which a kind of be directed to large-scale wind power Island detection method 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 depart from major network Afterwards, the running status to its lower institute on-load power supply is continued.In large-scale wind electricity generation system, isolated island is effectively and timely detected It is significant to Wind turbines and local load.In principle and situation and distribution that large-scale wind power access isolated island triggers 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, the quality of power supply is also uncontrollable.But even more serious threat is, Overvoltage problem in islanded system.
Cause Large Scale Wind Farm Integration(Base)Have in islanded system the reason for overvoltage a lot, summary summarizes, and has as follows It is several:1)Under some failure situations, islanded system loses system earth;Blower fan generally by step-up transformer central point Acquisition system zero point, when feeder fault, blower fan 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 blower fan, fan converter are usually to carry out current control, wind Machine is boosted by transformer step by step, and blower fan is also required to that electric energy is delivered into booster stations by longer current collection feeder line, is herein Larger reactance in system be present, system impedance is big, and electromagnetic environment is complex, suddenly under power-off, can produce larger transient state Overvoltage.3)Islanded system is time-dependent system, and its damping is smaller, can 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 Very big transient overvoltage occurs.
At present, conventional 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.
Passive detection method monitors one or more power network electrical quantity, according to electrical quantity and the direct deviation of set threshold value, It can be determined that whether interest region occurs island operation state.Abnormal number typically by finding frequency, voltage or phase angle Multiple factor of judgment such as anomalous variation of harmonic wave in value or detecting system, the presence of isolated island can be determined after comprehensive analysis.
The advantages of passive detection method, is, because the control strategy of combining inverter in itself just needs to detect terminal voltage, This method need not increase extra hardware circuit or independent protective relay;It is noiseless to power network, to the quality of power supply without shadow Ring;Under more inverters, detection efficiency will not reduce.Its problem is non-detection region(Non-Detection Zone, NDZ)Be possible to quite big, threshold threshold value is difficult to set, and has both been higher than value during normal operation, again less than isolated island when value. In order to reduce NDZ, the sensitivity of device is often improved, but equipment fault-free trip can be triggered, influences the normal operation of system;At certain In the case of some specific, NDZ is very big;Some parameters are unable to direct measurement, it is necessary to complicated calculating can just obtain, its calculation error And the calculating time can also have an impact to Detection results.
Active detecting method is injecting voltage, frequency or phase angle in power network, so as to cause line voltage, frequency or phase The disturbance of parallactic angle, power distribution network when these disturbances are for grid-connected state, because the balance by major network is clamped down on, 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 judge whether that isolated island occurs.
The advantages of active detecting method, is that NDZ is smaller, and accuracy of detection is higher, can detect isolated island exactly.The method The shortcomings that be due to introducing disturbance quantity, cause the transient response that the power network quality of power supply declines and power network is unnecessary;Control is calculated Method is more complicated, and practical application is difficult;Under different load characteristics, there is very big difference in Detection results, even be failed when serious.
Detection method based on signal of communication cut-offs state using wired or wireless communication mode come detect breaker, Determine whether that there occurs isolated island according to the change of circuit-breaker status.
Detection method advantage based on signal of communication:Detection zone nothing but(NDZ), detection accurately and reliably;For single or more The isolated island detection of individual inverter is all effective;Its performance is unrelated with the type of DG devices, and also the normal operation of power network will not be made Into interference, therefore it is very reliable island detection method.This method shortcoming:Need to add equipment, cost of implementation is high, and operation is multiple It is miscellaneous, it is necessary to which many certifications, economy are low.
Current main method is all the progress isolated island detection in low-voltage network, the height electricity to be generated electricity for large-scale wind The isolated island of pressure grade detects and has no pertinent literature.At present, existing power distribution network isolated island detection Patents are broadly divided into as follows Several classes:
Passive detection method:
The patent of Patent No. 201510084241.3 proposes a kind of anti-isolated island protection of new photovoltaic plant passive type Method.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 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 transformer station 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 using photovoltaic plant as research pair As.
Active detecting method:
The patent of Patent No. 201410221942.2 provides a kind of Wind turbines isolated island method of testing.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 possess 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, island effect test can be carried out to the Large Copacity power supply such as photovoltaic plant kind equipment.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, by controlling combining inverter, the disturbance certain to injections such as its power output, frequency or phases, while detect inverter Output situation;When power network normal work, due to the balanced action of power network, disturbing signal is not enough to change combining inverter Output characteristics;When electric network fault or power down, due to the feedback effect of disturbing signal, the output characteristics of combining inverter is just Understand accelerated accumulation and exceed allowed band, produce the protection device that a signal triggers grid-connected switch, make its tripping operation.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 of RLC loads in parallel is 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 that grid-connected photovoltaic is triggered in test process Become the anti-isolated island protection of device.This method belongs to active detecting method.
Detection method based on signal of communication:
Patent No. 201180043345.X patent proposes a kind of for detecting low pressure(LV)Isolated island in electric power networks The method of situation, this method are used in the network of Multi- Switch signal, by detecting the position signalling of network interruption road device, and with it is true Value table is contrasted, and using the method tabled look-up, and the method by disconnecting power electrical unit is protected to system.This method pin 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 station domain isolated island guard method and a kind of station domain isolated island Protection system, by obtaining the positional information of breaker related to producing island operation state in transformer station region, 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 pin carries out isolated island detection in transformer station's scope, 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 because large-scale wind generates electricity System, the electrical distance of each blower fan to wind power plant primary substation is longer, and the overvoltage that can cause blower fan feeder line using this method is asked Topic, so as to influence the service life of blower fan.
Patent No. 201310039649.X patent provides a kind of anti-isolated island protection system of distributed power generation grid-connected system System and its guard method, based on carrier communication and decentralized detection technology, the information that grid side is obtained by upper carrier terminal equipment is carried out Isolated island differentiates and the next carrier terminal equipment is controlled to the grid entry point switch of user side distributed power source, cuts off distributed power source, prevents The only generation of island effect, improve the reliability and security 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.
Patent No. 201310086985.X patent 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 power source in islet operation, the FTU in the distributed power source exit is just Ground sends the order of isolated island protection, and this DG exit is switched off, makes 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, which discloses one kind, has 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 and judge and anti-isolated island defencive function, and by setting three-phase inversion Device realizes the function of low voltage crossing, so as to which low voltage crossing and anti-isolated island defencive function be coexisted, has reached enhancing photovoltaic The purpose of electric power station system stability and security.This method carries out anti-isolated island protection for photovoltaic generating system, is not related to big The anti-isolated island protection of scale land management formula wind-power electricity generation.
The patent of Patent No. 201310560121.7 provides a kind of anti-islet operation system of more plant-grid connection transformer stations. It can fast and accurately pass through judgement during for line fault, main transformer failure and bus-bar fault occurring in 110kV transformer stations 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.
Patent No. 201320048498.X patent provides a kind of intelligent 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 collection transformer station's high, medium and low voltage side in real time, is overhauled with reference to prepared auto restart Whether pressing plate puts into or exits, to identify the current running status of transformer station's high, medium and low voltage side element;According to physical cabling feelings Condition and live operation demand, by apparatus function pressing plate, the backup power automatic switching function and the protection of anti-isolated island for selecting high, medium and low voltage side are No opening;Setting high, medium and low voltage side is controlled for throwing mode by device software, and the member of the high, medium and low voltage side with identifying before The running status of part is matched, if mismatched, sends out alarm signal, device locking electric discharge.This method possesses anti-isolated island protection Function, existing island state and isolated island scope in transformer station, and the photovoltaic plant in tripping respective range can be detected rapidly Grid-connected switch.This method carries out isolated island detection just for transformer station's scope, is not related to carry out isolated island inspection in large-scale wind electricity base Survey.
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 based on prim methods and carries out isolated island division, 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.
The content of the invention
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 Island detection method, it is quick to realize, accurately, efficiently, it is safe and stable the advantages of.
To achieve the above object, the technical solution adopted by the present invention is:
A kind of island detection method 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 network is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, And node corresponding to circuit breaker trip signal is pushed into queue, while the step of start anti-theft mode hopping block;
And
Logic judgment is carried out according to the node connection table after renewal and queue, so as to judge corresponding to circuit breaker trip signal Node it is no formed isolated island the step of.
Preferably, described the step of initializing node type table and node connection table, it is 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, and the root node in monitoring network is set into 3, and remaining node is set to 0, wherein, it is initialized as 1 or 2 Node be fringe node, the node for being initialized as 0 is internal node;
Initialize node connection table:Network for including 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 put 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 network, and according to the circuit breaker trip signal update of monitoring Node connection table, and node corresponding to circuit breaker trip signal is pushed into queue, while the step of start anti-theft mode hopping block, specifically Including:
Step 2:The circuit breaker trip signal in power network is monitored, while starts 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 Into step 4;
Step 4:More new node connection table, output node queue is initialized, and empty output node queue;
Step 5:Trip signal queue is initialized, empties trip signal queue;Trip signal counter is initialized, and Counter is set to 0;
Step 6:Circuit breaker trip signal is pushed into trip signal queue one by one, and remembered by trip signal counter Record the number of trip signal.
Preferably, circuit breaker trip signal is pushed into trip signal queue 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 pushed into trip signal queue, it is on the contrary then by d(B, A)It is pushed into trip signal queue.
Preferably, start anti-theft mode hopping block in the step 2, be specially:Start thread and carry out anti-jump detection, if hair Existing node jump, jump is handled 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, the node connection table and queue according to after renewal carries out logic judgment, so as to judge that breaker is jumped Node corresponding to lock signal it is no formed isolated island the step of specifically include:
Step 7:Whether the trip signal in trip signal counter is judged 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 queue is initialized, empties isolated island node queue;
Step 10:A trip signal, trip signal counter -1 are taken out from trip signal queue;
Step 11:By node push-in isolated island node queue, isolated island node number meter corresponding to the trip signal of above-mentioned taking-up Number device+1;
Step 12:A node, isolated island node number counter -1 are taken out from isolated island node queue
Step 13:Judge whether the node is root node according to the node state table after renewal, if root node, go to step 14;It is no, then go to step 15;
Step 14:Isolated island node queue is emptied, isolated island node number counter is emptied, goes to step 7;
Step 15:By the node taken out from isolated island node queue and the node in trip signal queue one by one compared with whether It is identical, if it is different, and going to step 17;If there is identical, 16 are gone to step;
Step 16:After the same node point is rejected from trip signal queue, remaining node is pushed into trip signal queue;
Step 17:Can node state table in the updated find and the node UNICOM that is taken out from isolated island node queue Node, can, then 18 are gone to step, otherwise goes to step 19;
Step 18:Assuming that shared m node and the node UNICOM taken out from isolated island node queue, will be individual with the m of UNICOM Node push-in isolated island node queue, while by isolated island node number counter+m;Go to step 12;
Step 19:The node taken out from isolated island node queue is pushed into output node queue;
Step 20:Judge whether isolated island node counter is 0, if it is not, then going to step 12;If so, then go to step 21;
Step 21:All nodes in output node queue are taken out, all nodes composition output in output node queue 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:For all isolated island nodes in each isolated island of output, with reference to node type table, anti-isolated island is carried out Machine operation is cut in protection.
Technical scheme has the advantages that:
Technical scheme, for large-scale wind electricity generation system, in mains side high pressure major network, carry out isolated island detection And the protection of anti-isolated island, have it is quick, accurately, efficiently, it is safe and stable the advantages of.Technical solution of the present invention does not consider circuit simultaneously Weight, it can faster carry out anti-isolated island protection act.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is non-faulting phase voltage elevated view in the case of existing singlephase earth fault;
Fig. 2 is the island detection method flow for large-scale wind power with anti-jump function described in the embodiment of the present invention Figure;
Fig. 3 is the power network connection diagram described in the embodiment of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
As shown in Fig. 2 a kind of island detection method 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 network is monitored, and according to the circuit breaker trip signal update node connection table of monitoring, And node corresponding to circuit breaker trip signal is pushed into queue, while the step of start anti-theft mode hopping block;
And
Logic judgment is carried out according to the node connection table after renewal and queue, so as to judge corresponding to circuit breaker trip signal Node it is no formed isolated island the step of.
Preferably, the step of initializing node type table and node connection table, it is 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, and the root node in monitoring network is set into 3, and remaining node is set to 0, wherein, it is initialized as 1 or 2 Node be fringe node, the node for being initialized as 0 is internal node;
Initialize node connection table:Network for including 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 put 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 network is monitored, and according to the circuit breaker trip signal update node of monitoring Connection table, and node corresponding to circuit breaker trip signal is pushed into queue, while the step of start anti-theft mode hopping block, specific bag Include:
Step 2:The circuit breaker trip signal in power network is monitored, while starts 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 Into step 4;
Step 4:More new node connection table, output node queue is initialized, and empty output node queue;
Step 5:Trip signal queue is initialized, empties trip signal queue;Trip signal counter is initialized, and Counter is set to 0;
Step 6:Circuit breaker trip signal is pushed into trip signal queue one by one, and remembered by trip signal counter Record the number of trip signal.
Preferably, circuit breaker trip signal is pushed into trip signal queue 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 pushed into trip signal queue, it is on the contrary then by d(B, A)It is pushed into trip signal queue.
Preferably, start anti-theft mode hopping block in step 2, be specially:Start thread and carry out anti-jump detection, if it find that having Node jump, jump is handled using interrupt mode, and saving scene, preferred process jump event, after the completion of jump event handling, Restoring scene, continue with anti-isolated island protection event.
Preferably, logic judgment is carried out according to the node connection table after renewal and queue, so as to judge that circuit breaker trip is believed Node corresponding to number it is no formed isolated island the step of specifically include:
Step 7:Whether the trip signal in trip signal counter is judged 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 queue is initialized, empties isolated island node queue;
Step 10:A trip signal, trip signal counter -1 are taken out from trip signal queue;
Step 11:By node push-in isolated island node queue, isolated island node number meter corresponding to the trip signal of above-mentioned taking-up Number device+1;
Step 12:A node, isolated island node number counter -1 are taken out from isolated island node queue
Step 13:Judge whether the node is root node according to the node state table after renewal, if root node, go to step 14;It is no, then go to step 15;
Step 14:Isolated island node queue is emptied, isolated island node number counter is emptied, goes to step 7;
Step 15:By the node taken out from isolated island node queue and the node in trip signal queue one by one compared with whether It is identical, if it is different, and going to step 17;If there is identical, 16 are gone to step;
Step 16:After the same node point is rejected from trip signal queue, remaining node is pushed into trip signal queue;
Step 17:Can node state table in the updated find and the node UNICOM that is taken out from isolated island node queue Node, can, then 18 are gone to step, otherwise goes to step 19;
Step 18:Assuming that shared m node and the node UNICOM taken out from isolated island node queue, will be individual with the m of UNICOM Node push-in isolated island node queue, while by isolated island node number counter+m;Go to step 12;
Step 19:The node taken out from isolated island node queue is pushed into output node queue;
Step 20:Judge whether isolated island node counter is 0, if it is not, then going to step 12;If so, then go to step 21;
Step 21:All nodes in output node queue are taken out, all nodes composition output in output node queue 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:For all isolated island nodes in each isolated island of output, with reference to node type table, anti-isolated island is carried out Machine operation is cut in protection.
As shown in figure 3, being connected for somewhere power network, its interior joint 1 becomes for 750kV Dunhuang, and node 2 becomes for 330kV Yumen, Node 3 is 110kV Yumen town transformer station, and node 4 is that the traction of 110kV Yumen town becomes, and node 5 becomes for 110kV Yanguan Pass, and node 6 is 110kV Guazhou County gas pressure station, node 7 are 110kV Anxis 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.
Connected with reference to above-mentioned power network, the method for the present invention is described as follows:
Step 1:Initialize node type table
14 nodes are included in the network altogether, 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 network is monitored, while starts anti-theft mode hopping block;System enters circulatory monitoring Stage.
Step 3:Whether circuit breaker trip signal is found;At present, No. 3 node 110kV Yumen town transformer station open circuits are monitored Device, No. 5 node 110kV Yanguan Pass transformer breakers and No. 6 node 110kV Guazhou County compressor station two-wires find circuit breaker trip signal.
Step 4:More new node connection table, and output node queue is initialized, and empty;Node connection table after renewal is such as Shown in table 3:
Node connection table after table 3, renewal.
Step 5:Trip signal queue is initialized, empties queue;Trip signal counter is initialized, and is set to 0;
Step 6:Circuit breaker trip signal is pushed into trip signal queue one by one, and records the number of trip signal;By d (3,2)、d(5,2)And d(6,5)It is pushed into queue;Trip signal number is 3;
Step 7:Judge whether trip signal is more than 0, judged result is more than 0;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node queue is initialized, empties queue;
Step 10:A trip signal, trip signal counter -1 are taken out from trip signal queue;Now, d is taken out (6,5), trip signal counter is 2;
Step 11:By node push-in isolated island node queue, isolated island node number counter+1 corresponding to the trip signal;Section The push-in isolated island of point 6 node queue, isolated island node number counter are 1;
Step 12:A node, isolated island node number counter -1 are taken out from isolated island node queue;Isolated island node queue Middle taking-up node 6, isolated island node number counter are 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 queue that trips one by one compared with it is whether identicalThere are 2 in tripping operation node queue Node is with currently differing;All nodes are pushed into isolated island node queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundIt is no, go to step 19;
Step 19:The node is pushed into output node queue;
Step 20:Whether isolated island node counter is 0It is then to go to step 21;
Step 21:Take out all nodes in " output node queue ";
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, judged result is more than 0;
Step 8:Initialization isolated island node number counter is simultaneously set to 0;
Step 9:Isolated island node queue is initialized, empties queue;
Step 10:A trip signal, trip signal counter -1 are taken out from trip signal queue;Now, d is taken out (5,2), trip signal counter is 1;
Step 11:By node push-in isolated island node queue, isolated island node number counter+1 corresponding to the trip signal;Section The push-in isolated island of point 5 node queue, isolated island node number counter are 1;
Step 12:A node, isolated island node number counter -1 are taken out from isolated island node queue;Isolated island node queue Middle taking-up node 5, isolated island node number counter are 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 queue that trips one by one compared with it is whether identicalThere is 1 in tripping operation node queue Node is with currently differing;All nodes are pushed into queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundIt is to go to step 18;
Step 18:Node 7 and node 11-14 totally 5 nodes UNICOM therewith, will be pushed into team with 5 nodes of the node UNICOM Row, while be 5 by isolated island node number counter, go to step 12;
Step 12:A node is taken out from isolated island node queue, takes out node 7, 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 queue one by one compared with it is whether identicalIt is after node is taken out one by one and current Node is compared, and different, then all nodes are pushed into trip signal queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundOtherwise 19 are gone to step;
Step 19:The node is pushed into output node queue;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is taken out from isolated island node queue, takes out 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 queue one by one compared with it is whether identicalIt is after node is taken out one by one and current Node is compared, and different, then all nodes are pushed into queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundOtherwise 19 are gone to step;
Step 19:The node is pushed into output node queue;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is taken out from isolated island node queue, takes out 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 queue one by one compared with it is whether identicalIt is after node is taken out one by one and current Node is compared, and different, then all nodes are pushed into queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundOtherwise 19 are gone to step;
Step 19:The node is pushed into output node queue;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is taken out from isolated island node queue, takes out 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 queue one by one compared with it is whether identicalIt is after node is taken out one by one and current Node is compared, and different, then all nodes are pushed into queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundOtherwise 19 are gone to step;
Step 19:The node is pushed into output node queue;
Step 20:Whether isolated island node counter is 0It is no, then go to step 12;
Step 12:A node is taken out from isolated island node queue, takes out 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 queue one by one compared with it is whether identicalIt is after node is taken out one by one and current Node is compared, and different, then all nodes are pushed into queue again, and go to step 17;
Step 17:The node with currently taking out node UNICOM can be foundOtherwise 19 are gone to step;
Step 19:The node is pushed into output node queue;
Step 20:Whether isolated island node counter is 0It is then to go to step 21;
Step 21:Take out all nodes in " output node queue ";
Step 22:Judge whether contain power supply and load bus simultaneously in output node set, be 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, with reference to node type table, enter Machine operation is cut in the anti-isolated island protection of row.
Anti- jump detection module by detecting the voltage, electric current or electric signal of circuit, 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.
As in above-mentioned embodiment, anti-jump detection module is implemented to detect all breakers, when detecting open circuit During device tripping operation jump, no matter anti-isolated island now protects which step proceeded 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, be transferred in above-mentioned steps 4 and carry out Processing, after having judged whether the jump node forms isolated island, return again to the step of original anti-isolated island protection is carried out.
Finally it should be noted that:The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic. Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's Within protection domain.

Claims (6)

  1. A kind of 1. island detection method for large-scale wind power with anti-jump function, it is characterised in that including:
    The step of initializing node type table and node connection table;
    The circuit breaker trip signal in power network is monitored, according to the circuit breaker trip signal update node connection table of monitoring, by open circuit Corresponding to device trip signal node be pushed into queue, start anti-theft mode hopping block the step of;
    And
    Logic judgment is carried out according to the node connection table after renewal and queue, so as to judge node corresponding to circuit breaker trip signal The step of whether forming isolated island.
  2. 2. the island detection method for large-scale wind power with anti-jump function according to claim 1, its feature exist In, described 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, born Lotus node initializing be 2, the root node in monitoring network is set to 3, remaining node is set to 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:Network for including n node, for any two node A and B, if between the node of A, B two There is 1 power circuit connection and circuit is in connection status, then A rows B row put 1 in table, there are two to be then set to 2, if the node of A, B two Between unregulated power connection or connection line be off, then A rows B row are set to 0 in table.
  3. 3. the island detection method for large-scale wind power with anti-jump function according to claim 2, its feature exist In the circuit breaker trip signal in the monitoring power network, will be disconnected according to the circuit breaker trip signal update node connection table of monitoring Corresponding to the device trip signal of road node be pushed into queue, start anti-theft mode hopping block the step of, specifically include:
    Step 2:The circuit breaker trip signal in power network is monitored, while starts 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 enters Step 4;
    Step 4:More new node connection table, output node queue is initialized, and empty output node queue;
    Step 5:Trip signal queue is initialized, empties trip signal queue;Trip signal counter is initialized, and will meter Number device is set to 0;
    Step 6:Circuit breaker trip signal is pushed into trip signal queue one by one, and jumped by trip signal number counter records The number of lock signal.
  4. 4. the island detection method for large-scale wind power with anti-jump function according to claim 3, its feature exist In circuit breaker trip signal is pushed into trip signal queue and is specially by the step 6 one by one:
    If the breaker of connection two nodes of A, B trips, if node A is more farther to the distance of root node than node B distances, By d (A, B) signal be pushed into trip signal queue, it is on the contrary then by d (B, A) push-in trip signal queue.
  5. 5. the island detection method for large-scale wind power with anti-jump function according to claim 3, its feature exist In, startup anti-theft mode hopping block in the step 2, specially:Start thread and carry out anti-jump detection, if it find that there is node to steal Jump, jump, and saving scene are handled using interrupt mode, preferred process jump event, after the completion of jump event handling, recover existing , continue with anti-isolated island protection event.
  6. 6. the island detection method for large-scale wind power with anti-jump function according to claim 4, its feature exist In the node connection table and queue according to after renewal carries out logic judgment, so as to judge corresponding to circuit breaker trip signal The step of whether node forms isolated island specifically includes:
    Step 7:Whether the trip signal in trip signal counter is judged 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 queue is initialized, empties isolated island node queue;
    Step 10:A trip signal, trip signal counter -1 are taken out from trip signal queue;
    Step 11:By node push-in isolated island node queue corresponding to the trip signal of above-mentioned taking-up, isolated island node number counter+ 1;
    Step 12:A node, isolated island node number counter -1 are taken out from isolated island node queue;
    Step 13:Judge whether the node is root node according to the node state table after renewal, if root node, go to step 14; It is no, then go to step 15;
    Step 14:Isolated island node queue is emptied, isolated island node number counter is emptied, goes to step 7;
    Step 15:By the node taken out from isolated island node queue and the node in trip signal queue one by one compared with whether phase Together, if it is different, and going to step 17;If there is identical, 16 are gone to step;
    Step 16:After the same node point is rejected from trip signal queue, remaining node is pushed into trip signal queue;
    Step 17:Can node state table in the updated find the section of the node UNICOM with being taken out from isolated island node queue Point, can, then 18 are gone to step, otherwise goes to step 19;
    Step 18:Assuming that shared m node and the node UNICOM taken out from isolated island node queue, by the m node with UNICOM It is pushed into isolated island node queue, while by isolated island node number counter+m;Go to step 12;
    Step 19:The node taken out from isolated island node queue is pushed into output node queue;
    Step 20:Judge whether isolated island node counter is 0, if it is not, then going to step 12;If so, then go to step 21;
    Step 21:All nodes in output node queue are taken out, all nodes composition output node in output node queue 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:For all isolated island nodes in each isolated island of output, with reference to node type table, anti-isolated island protection is carried out Cut machine operation.
CN201510823832.8A 2015-11-24 2015-11-24 There is the island detection method of anti-jump function for large-scale wind power Active CN105375520B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510823832.8A CN105375520B (en) 2015-11-24 2015-11-24 There is the island detection method of anti-jump function for large-scale wind power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510823832.8A CN105375520B (en) 2015-11-24 2015-11-24 There is the island detection method of anti-jump function for large-scale wind power

Publications (2)

Publication Number Publication Date
CN105375520A CN105375520A (en) 2016-03-02
CN105375520B true CN105375520B (en) 2018-01-19

Family

ID=55377436

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510823832.8A Active CN105375520B (en) 2015-11-24 2015-11-24 There is the island detection method of anti-jump function for large-scale wind power

Country Status (1)

Country Link
CN (1) CN105375520B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01291629A (en) * 1988-05-18 1989-11-24 Hokuriku Electric Power Co Inc:The Faulty section detecting method for power transmission line
CN102664391A (en) * 2012-04-25 2012-09-12 广东电网公司珠海供电局 Substation area island protection method and substation area island protection system
CN103311906A (en) * 2013-03-19 2013-09-18 山东理工大学 Switch displacement island detection and direct-trip island protection method based on wide area information
CN105372529A (en) * 2015-11-24 2016-03-02 国网甘肃省电力公司 Power grid islanding detection and anti-islanding protection method for large-scale wind power generation system
CN105978017A (en) * 2015-11-24 2016-09-28 国网甘肃省电力公司 Method for detection and protection of island with anti-theft and anti-tripping function aiming at large-scale wind power

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01291629A (en) * 1988-05-18 1989-11-24 Hokuriku Electric Power Co Inc:The Faulty section detecting method for power transmission line
CN102664391A (en) * 2012-04-25 2012-09-12 广东电网公司珠海供电局 Substation area island protection method and substation area island protection system
CN103311906A (en) * 2013-03-19 2013-09-18 山东理工大学 Switch displacement island detection and direct-trip island protection method based on wide area information
CN105372529A (en) * 2015-11-24 2016-03-02 国网甘肃省电力公司 Power grid islanding detection and anti-islanding protection method for large-scale wind power generation system
CN105978017A (en) * 2015-11-24 2016-09-28 国网甘肃省电力公司 Method for detection and protection of island with anti-theft and anti-tripping function aiming at large-scale wind power

Also Published As

Publication number Publication date
CN105375520A (en) 2016-03-02

Similar Documents

Publication Publication Date Title
Memon et al. A critical review of AC Microgrid protection issues and available solutions
CN101436780B (en) Self-healing control method for urban power distribution network
CN105391033B (en) Layering for large-scale wind power generation divides domain anti-isolated island guard method
Islam et al. Study of micro grid safety & protection strategies with control system infrastructures
Begovic et al. System integrity protection schemes (SIPS)
CN105372529B (en) For the power grid isolated island detection of large-scale wind power and anti-isolated island guard method
Ropp et al. Discussion of a power line carrier communications-based anti-islanding scheme using a commercial automatic meter reading system
Patnaik et al. AC microgrid protection–a review: Current and future prospective
Sharafi et al. Transmission system wide-area back-up protection using current phasor measurements
CN105743122B (en) Island detection method suitable for cluster distributed photovoltaic system
CN101714756B (en) Equivalent negative sequence impedance-based distributed generator islanding protection method
CN108957245A (en) A kind of flexible direct current power distribution network monopole fault identification method based on total failure electric current
Mirsaeidi et al. Review and analysis of existing protection strategies for micro-grids
Fang Reflections on stability technology for reducing risk of system collapse due to cascading outages
Mirsaeidi et al. A comprehensive overview of different protection schemes in micro-grids
Sarwagya et al. An extensive review on the state-of-art on microgrid protection
CN106026048B (en) A kind of DC grid troubleshooting strategy based on detection in-situ protection on the spot
Isa et al. Evaluation on non-detection zone of passive islanding detection techniques for synchronous distributed generation
Gomes et al. Microgrid protection schemes
CN105162086B (en) Guard method for the grid-connected transformer grounding system of DG
Ebrahim et al. An algorithm for detection of fault, islanding, and power swings in DG-equipped radial distribution networks
CN105978017B (en) There is the method for detecting and protecting isolated island of anti-jump function for large-scale wind power
CN105375520B (en) There is the island detection method of anti-jump function for large-scale wind power
Begovic et al. On wide area protection
Aman et al. A hybrid scheme of load shedding using globalized frequency and localized voltage (GFLV) controller

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant