CN101944777A - Intelligent self-healing monitoring method of extra high voltage power network - Google Patents
Intelligent self-healing monitoring method of extra high voltage power network Download PDFInfo
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Abstract
The invention discloses an intelligent self-healing monitoring method of extra high voltage power network, belonging to the field of electric transformer and distribution. The invention uses the self-healing monitoring method that the power network control center collects the fault information, estimates the fault point according to the action information, judges the fault point according to the visualization technology, and starts the automatic recovery project. The method solves the self-healing problem of extra high voltage power network, performs the prevention and correction control, and makes the dispose strategy based on the information quickly, thereby avoiding the cascade trip caused by load transfer, realizing the safe and stable addition control of the power network from the entire network perspective, and replenishing the disadvantages of area and in situ emergency control measure. Aiming at the specific characteristics in the aspects of running, dispatching and managing of the extra high voltage power network, the method can collect and use the information more comprehensive, and make the dispose strategy quickly to earn the time for the avoiding of cascade trip caused by load transfer, thereby avoiding the further enlargement of fault coverage due to wrong dispose, and solving the self-healing problem of the extra high voltage power network.
Description
Technical field
The invention belongs to change, distribution field, relate in particular to a kind of fault processing system or method that is specially adapted for the monitoring of supergrid network failure.
Background technology
In recent years, large-scale power outage once repeatedly took place in the home and abroad electric power system, and these accidents have caused people's showing great attention to power grid security.
For terminate this on a large scale, the having a power failure on a large scale of of great weight, electrical network one-level, countries such as the U.S., West Europe begin to build " intelligence " electrical network, China State Grid Corporation of China has also formulated the grand plan of construction " strong intelligence " electrical network.
So-called " intelligent grid ", it is exactly the intellectuality of electrical network, it is to be based upon on the basis of integrated, high-speed bidirectional communication network, sensing by the advanced person and measuring technique, advanced equipment and technology, advanced control method and advanced DSS The Application of Technology realize reliable, the safety, economy of electrical network, efficient, environmental friendliness and target safe in utilization.
In other words, intelligent grid is to be object with the electric power system that comprises generating, transmission of electricity, distribution and each link of electricity consumption, constantly research and develop new power grid control technology, information technology and administrative skill, and with its combination, realization is from the intelligent AC of all link information of electricity consumption of generating electricity, optimization electrical production, conveying and the use of system are the fine distant views of following power network development.
One of maximum characteristics of intelligent grid are to have " self-healing " ability.Self-healing is an important attribute of intelligent grid, be data acquisition and supervisory control system (supervisory control and data acquisition, SCADA), EMS (energy management system, development EMS) and perfect.
In other words, the self-healing ability of intelligent grid is the ability that its self-prevention and self-recovery, oneself heal.
According to " future development of intelligent grid control centre technology " (author: Zhang Baiming, Sun Hongbin, Wu Wenchuan, Guo Qing comes, Automation of Electric Systems, 2009,33 (17): the 21-28.) narration in the literary composition, self-healing control has two notable features: (1) prevention and control are the major control means, in time find, diagnose and eliminate potential faults; (2) have the system that keeps under the failure condition ability of operation continuously, do not cause the running losses of system, and from fault, recover by autonomous repair function.
" big electrical network is realized the theoretical research direction of self-healing " (2009,33 (17): 29-32.) in the literary composition, the self-healing that has proposed electrical network can be divided into 2 aspects for author: Wan Qiulan, Automation of Electric Systems: the one, element layer, the 2nd, system layer.
Element layer is first and second element of electric power networks, as primary element circuit breaker, transformer, FACTS device etc. is arranged; Secondary component has all kinds of protections and automatics etc.
The self-healing of element layer mainly is at the reparation of certain local devices or replacement.System layer then is to isolate voluntarily and finish automatically at the fault in the system not interrupt the function of transmitting electricity and powering, and it is based on system-wide information, can guarantee normally to operate to target to greatest extent and relate to processing to a plurality of elements with total system.
Document " electrical network self-healing controlling schemes " (author: Guo Zhizhong. Automation of Electric Systems, 2005,29 (10): " 2-3-6 " Frame Design that has proposed electrical network self-healing control 85-91.), and the relevant issues of electrical network self-healing control and the new technology of the development of relying have been proposed, for supergrid self-healing has proposed thinking and direction.
In number of patent application is 200810243972.8 Chinese invention patent application, define one and power distribution network voltage, electric current, active power, reactive power, the function of frequency dependence is the system mode function, and according to the size of system mode function, the definition state of emergency, return to form, abnormality, the state of alert, safe condition, imaginary fault is carried out load transfer capability analysis under the N-1 situation, pass through on-line monitoring, check, regulate reactive-load compensation equipment, the mode of circuit switched, eliminate the potential faults of urban power distribution network, make system progressively transfer safe condition to.
Equally, in number of patent application is 200910032589.2 Chinese invention patent application, emphasis has been described function flow path and the processing procedure in the urban distribution network self-healing control procedure, has defined the state of emergency equally, returns to form, abnormal operating condition, recessive safe condition, dominance safe condition, economical operation state or strong running status.
Above-mentioned two pieces of patent application documents only are applicable to conventional high, medium and low voltage power distribution network, for superhigh pressure (220kV and more than) electrical network, because equipment that its system constitutes, the difference on management and running scheme and the electric pressure is brought and the difference/difference on the control method thereof, the scheme of above-mentioned two pieces of patent application documents is also inapplicable or directly apply mechanically.
Document about electrical network self-healing all is technology and the implementation framework that needs discussing at present, and the concrete implementation procedure in detail of supergrid self-healing yet there are no report.
According to actual for many years working experience and theoretical research, the applicant thinks, for supergrid (for for purpose of brevity, be designated hereinafter simply as electrical network, but for the technical program, described electrical network all is meant the supergrid of 220kV and above electric pressure), according to its particularity, electrical network self-healing control otherwise stop detecting self margin of safety realizes self-prevention.After breaking down, discern fault automatically, isolated fault, and, determine recovery policy according to electric network swim variation and margin of safety situation.
Summary of the invention
Technical problem to be solved by this invention provides a kind of intelligent self-cure monitoring method of supergrid, its at supergrid in operation, particularity aspect the dispatching management, constantly detect the margin of safety of self, realize self-prevention, after electrical network breaks down, discern fault automatically, isolated fault, and, determine recovery policy according to electric network swim variation and margin of safety situation.
Technical scheme of the present invention is: a kind of intelligent self-cure monitoring method of supergrid is provided, comprises the switchgear, protective relaying device, scheduling/operations staff and the grid control centre that constitute electrical network, it is characterized in that:
Situations such as no matter A has fault-free to take place, grid control centre cooperates with the safety and stability nucleus correcting program all the time, and whether continuous detection of grid has safety and stability nargin deficiency, and trend, voltage are out-of-limit;
B, when electrical network exists when unusual, grid control centre reply trend distributes and adjusts, and changes by exert oneself size or the ratio of exerting oneself of regulating local each unit, and controls the trend limit;
When zero load transfer ability, carry out network operation structure control decision-making, by modes such as on-line monitoring, check, adjusting reactive-load compensation equipment, circuit switched, distant place power supply input, cutting load, off-the-lines, make supergrid transfer safe condition to;
C, when electrical network has fault to take place, grid control centre carries out self-healing control by following step:
C1, fault message are collected;
C2, utilize set of actions database identification fault point;
C3, employing visualization technique are confirmed the fault point;
C4, execution recover prediction scheme automatically, fault point equipment is carried out system isolate;
C5, non-faulty component electrical network recover automatically;
C6, control is proofreaied and correct in the prevention in the self-healing process;
C7, reenter the safety and stability nucleus correcting program;
The intelligent self-cure monitoring method of D, employing " grid control centre is collected fault message, concluded the fault point, starts automatic recovery scheme according to action message failure judgement point, visualization technique ", solve the self-healing problem of supergrid, prevent to proofread and correct control, utilize the information strategy of handling it rapidly, avoid the cascade tripping that causes because of load transfer, realize the control of appending of electricity net safety stable from the whole network angle, remedy the zone and the deficiency of emergency control measure on the spot.
Concrete, the collection of described fault message comprises the collection of switch changed position and protection action message; Wherein, described switch changed position information comprises everything tripping operation or 500kV, the 220kV, 110kV, the 35kV switch that close a floodgate; Described protection action message comprises main transformer protection, route protection, switch protection, stands with the action message that becomes protection, low tension reactor protection, secondary capacitor protection, and its particular content comprises that protection type, fault localization result and the fault of action protection title, action is separate.
Described set of actions database comprises all 35kV and the above switch changed position information and the protection action message of being correlated with when break down in this fault point, and set of actions is kept in the database after all formulating; After fault took place, all protection action message and switch changed position information that relate to the loop of switch changed position all were uploaded to grid control centre, and control centre forms set of actions according to the information of collecting; Then the set of actions of each fault point under this set of actions and the pre-in advance current operational mode of formulating is mated, discern fault.
Described employing visualization technique is confirmed the fault point, comprises at least that the utilization scene is checked to return clear picture, or passes real-time video back control centre; Pass through the image/video that returns or pass back, the phenomena of the failure such as slight crack of checking earth fault, porcelain vase intuitively.
Describedly fault point equipment is carried out system isolate, after comprising the localization of faults, finish the isolation of fault point according to automatic recovery prediction scheme, transfer faulty equipment to inspecting state, the equipment that will be connected with faulty equipment transfers cold standby state to, so that the sound part of electrical network is resumed operation, also is convenient to faulty component is overhauled simultaneously.
Described automatic recovery prediction scheme comprises that the fault point at each fault point isolates program and non-faulty component automatic recovery program under the various operational modes.
Described non-faulty component electrical network recovers automatically, comprises accident prediction and typical operation ticket according to each transformer station that grid control centre is had jurisdiction over, and the recovering step of each non-faulty component in fault point of making is to reduce loss of outage and social influence to greatest extent.
After non-faulty component recovered automatically, variation had taken place in system operation mode, and the definite value district need be revised in some loop, and recovering prediction scheme automatically will switch the definite value district by automatic on-line before combined floodgate send electricity.
Described prevention in the self-healing process is proofreaied and correct controlled; comprise that N-1 principle in the grid control centre power application system static security analysis method works as the failure predication under the previous mode; under the N-1 state, investigate the load transfer ability; when preventing from other faults take place during this period, electrical network self-protection measure deficiency.
Described prevention in the self-healing process is proofreaied and correct controlled, also comprise grid control centre on-line intelligence aid decision and prevention and control, control and defence are coordinated in realization, the electrical network emergency control of the multiple faults of processing power transmission network and different factory station simultaneous faults, successive failure; When the existing automatic safety device control measure of electrical network are not enough, realize the control of appending of electricity net safety stable from the whole network angle, remedy the zone and the deficiency of emergency control measure on the spot.
Compared with the prior art, advantage of the present invention is:
1. this self-healing control method is compared advantage that traditional manual dispatching and manual operation recover and is exactly rapidly, effective, can collect, utilize the information strategy of handling it rapidly more comprehensively, for the cascade tripping of avoiding load transfer to cause has been striven for the time;
2. utilize the affirmation of video or image, can make fault point identification accurately and reliably, avoid causing fault coverage further to enlarge because of handling mistake to the fault point;
3. solved the self-healing problem of supergrid preferably, construction that can faster promotion intelligent grid.
Description of drawings
Fig. 1 is a supergrid self-healing control flow block diagram of the present invention;
Fig. 2 is the main wiring diagram of certain transformer station among the embodiment;
Fig. 3 is a position of the switch schematic diagram behind this station failure.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Among Fig. 1, after existing intelligent grid built up, transformer station substantially all was a unattended operation, and this is that the technical program is implemented and one of the overall background of carrying out.
As seen from the figure, after electrical network broke down, grid control centre began to collect the fault message of relevant transformer station, utilized database identification fault, judged the fault point by visualization technique again, and the isolated fault point, carried out the recovery of the non-faulty component of electrical network.
Resume work finish after, enter the safety and stability nucleus correcting program, have when unusual, take to regulate modes such as reactive-load compensation equipment, circuit switched, distant place power supply input, cutting load, off-the-line, make supergrid transfer safe condition to.
Concrete, no matter there is fault-free to take place, the grid control centre of intelligent grid (be called for short electrical network self-healing control) cooperates with the safety and stability nucleus correcting program all the time and does not stop detection of grid whether safety and stability nargin deficiency is arranged, situation such as trend, voltage are out-of-limit? when electrical network exists when unusual, self-healing control reply trend distributes and adjusts, by reducing exerting oneself of some units, or increase exerting oneself of other units, control the trend limit.When zero load transfer ability, can carry out network operation structure control decision-making,, make supergrid transfer safe condition to by modes such as on-line monitoring, check, adjusting reactive-load compensation equipment, circuit switched, distant place power supply input, cutting load, off-the-lines.
When fault takes place, carry out self-healing control by following step.
1. fault message is collected:
When fault takes place, switch changed position and protection action message will reach grid control centre.
Switch changed position information comprises everything tripping operation or 500kV, the 220kV, 110kV, the 35kV switch (the switch changed position information that is lower than the 35kV electric pressure is not uploaded) that close a floodgate.
The protection action message comprises main transformer protection, route protection, switch protection, stands with the action message that becomes protection, low tension reactor protection, secondary capacitor protection etc.; particular content (for example comprises the action protection title; first station 4173 line REL551 (II) protection), the protection type of action (for example; be the transfer trip action, is the span that still suddenlys change from action?), fault localization result, fault be separate etc.
2. utilize database identification fault point:
In this intelligent grid control centre, under several typical wiring modes, set of actions is set up in all possible each fault point of primary equipment in advance.
All 35kV when set of actions comprises this fault point fault and above switch changed position information and relevant protection action message.
Switch changed position information comprises switch trip or combined floodgate.
The protection action message comprises protection corresponding device, protection type, protection type of action.
For example protect the behavior aggregate platform can be: { second station 4175 line REL551 (II) protection transfer trip action }.
Set of actions is kept in the database by certain format after all formulating.
After fault took place, all protection action message and switch changed position information that relate to the loop of switch changed position all will be uploaded to grid control centre.Control centre forms set of actions according to the information of collecting.Then the set of actions of each fault point under the current operational mode of this set of actions and formulation is in advance mated and discern fault.
It should be noted that set of actions all making under certain operational mode.
When operational mode changes, need the corresponding modify set of actions.
Generally change, formulate a few cover set of actions in advance at possible bus knot row mode.If consider the situation of malfunctioning switch, can malfunctioning switch take place again formulate set of actions by under prior fault.
The present invention generally only considers the single failure point.
Consider complex fault or protect the fault point under the maloperation situation to judge as needs, can make the corresponding action set under the corresponding operational mode.
3. visualization technique is confirmed the fault point:
In traditional passive type 2D pattern monitoring pattern, out-of-limit and accident information often represents by modes such as alarm and accident pictures, and the dispatcher carries out the supervision of operation of power networks state based on the station figure of factory, geographical winding diagram, chart, alarm window mode.
In the intelligent visual pattern, made up the intelligent visual support platform, realized supervision, analysis, early warning, the aid decision of intelligent visual, the visual fault location in the realization accident, the generation of prompting accident directly perceived, the visual accident recovery scheme after the realization accident.
(soup is of heap of stone for Chen Jia, Sun Hongbin, and etc. Automation of Electric Systems, 2008,32 (6): 20-24.) the intelligent visual support platform is existing to be introduced to making up in " Power System Control Centers three-dimensional visualization technique and use in real time "; " intelligent grid scheduling key technology " (the tight victory, Yao Jianguo, Yang Zhihong, high ancestor and. power construction, 2009,30 (9): 1-4.) to thus after visual accident recovery scheme also be described, so above-mentioned notion and specifically technical scheme no longer narrate at this.
Can utilize database to identify the fault point rapidly.
In order further to confirm to utilize the intelligence patrol robot site to check in the fault point, return clear picture, or real-time video is passed back.
For GIS equipment (GAS-INSTULATED SWITCHGEAR, sulfur hexafluoride gas-insulating and fully-enclosed power distribution equipment), can transfer the image that is installed in the inner camera of GIS.
] can see the phenomena of the failure such as slight crack of earth fault, porcelain vase by image or video.
After concluding the fault point, the grid control centre personnel can start automatic recovery prediction scheme.
Automatically recover prediction scheme and comprise that the fault point at each fault point isolates program and non-faulty component automatic recovery program under the various operational modes.
4. the fault point isolates:
After the localization of faults, recover the isolation that prediction scheme is at first finished the fault point automatically,, also can overhaul simultaneously faulty component so that the sound part of electrical network is resumed operation.
Isolation processes is generally: transfer faulty equipment to inspecting state.The equipment that will be connected with faulty equipment transfers cold standby state to.
5. non-faulty component electrical network recovers automatically:
After the fault point isolation is finished, non-faulty component must be recovered to reduce loss of outage and social influence to greatest extent.Non-faulty component automatic recovery program is made the recovering step of each non-faulty component in fault point according to the accident prediction and the typical operation ticket of intelligent grid each transformer station that control centre has jurisdiction over.Recovering step should meet the operation and the accident treatment regulation of scheduling at different levels.The recovery time of power grid accident has been shortened in the automatic recovery of non-faulty component greatly.
After non-faulty component recovered automatically, variation had taken place in operational mode, and the definite value district need be revised in possible some loop, and recovering prediction scheme automatically will switch the definite value district by automatic on-line before combined floodgate send electricity.
6. control is proofreaied and correct in the prevention in the self-healing process:
N-1 principle in the power application system static security analysis method is worked as the failure predication under the previous mode, investigates the load transfer ability under the N-1 state, when preventing from other faults take place during this period, and electrical network self-protection measure deficiency.
Self-prevention also is embodied in the control centre can realize on-line intelligence aid decision and prevention and control, can realize coordinating control and defence, can handle the electrical network emergency control of the multiple faults of power transmission network and different factory station simultaneous faults, successive failure; When the existing automatic safety device control measure of electrical network are not enough, realize the control of appending of electricity net safety stable from the whole network angle, remedy the zone and the deficiency of emergency control measure on the spot.
At " future development of intelligent grid control centre technology " (Zhang Baiming, Sun Hongbin, Wu Wenchuan, Guo Qing comes. Automation of Electric Systems, 2009,33 (17): 21-28.) in the literary composition, proposed higher level control centre and followed the tracks of the electrical network variation, automatically be subordinate's generation external network equivalent model, and be issued to control centre of subordinate.Control centre of subordinate can carry out self-healing control according to current network equivalence model like this.
At " practice and the prospect of intelligent power distribution net self-healing control technology " (Gu Xinxin, Jiang Ning, Ji Kan, Deng. power construction, 2009,30 (7): 4-6.), define one and power distribution network voltage, electric current, active power, reactive power, the function of frequency dependence is the system mode function, and according to the size of system mode function, the definition state of emergency, return to form, abnormality, the state of alert, safe condition carries out load transfer capability analysis under the N-1 situation to imaginary fault, passes through on-line monitoring, check, regulate reactive-load compensation equipment, the mode of circuit switched, eliminate the potential faults of urban power distribution network, make system progressively transfer safe condition to.
In number of patent application is 200810243972.8 Chinese invention patent application, with state of electric distribution network be defined as safe condition, the state of alert, abnormality, return to form, the state of emergency etc., whether the self-healing control program does not stop detection of grid and is in a safe condition, judge promptly whether abnormal conditions are controlled, whether unit exception is arranged, overload, voltage unstability etc.When departing from safe condition, proofread and correct control.
State for supergrid is judged thinking and the method that can use for reference in the above-mentioned document, but stablizing of supergrid is more complicated, also needs other assistant criteria, also needs further research in this respect.
Bigger load transfer may take place and cause the part circuit overload, under the situation that faulty line can not recover immediately after taking place in fault, self-healing control reply trend distributes and adjusts, by reducing exerting oneself of some units, or increase exerting oneself of other units, control the trend limit.
When zero load transfer ability, can carry out network operation structure control decision-making,, make supergrid transfer safe condition to by modes such as on-line monitoring, check, adjusting reactive-load compensation equipment, circuit switched, distant place power supply input, cutting load, off-the-lines.
Embodiment:
With East China Power Grid 220kV grid control centre is example, supposes that this center only controls first station and second station, first station primary system main wiring diagram as shown in Figure 2, the second station links to each other with the first station by 4175,4176 lines.
After discussing the fault generation, how grid control centre discerns fault, and the isolated fault point, carries out the fault recovery of electrical network.
Suppose that stabilization of power grids problem does not take place this fault, and hypothesis 220kV electrical network connect compact, after fault disconnects a circuit, power supply that can't interruptible load.
1. a situation arises for fault:
Before fault took place, the position of the switch at first station represented that with black this switch is in a state that closes among the figure as shown in Figure 2, and switch is closing this loop of bit representation in running status.
Protection action situation is as shown in table 1.
Table 1: relaying protection actuating signal after the fault:
The position of the switch at first station (represents that with black switch closes the position) as shown in Figure 3 equally after the fault, and the second station also is two female two segmentation modes of connection, and 4175 line switchings at second station also trip after fault.
By the fault message analysis of Fig. 2 and table 1 as can be known, between first station 4181 wiretaps and the rheology fault has taken place, because this zone simultaneously in the zone of bus differential protection and route protection, has caused the 2 cover protections of 4181 circuits and positive female one section bus differential protection action.The tripping of female difference is gone up all switches for positive female one section, and high side 2010 switches of No. 1 main transformer of tripping, low- pressure side 311 and 312 switches, and first station 4175 route protections start transfer trip, tripping second station 4175 wiretaps.After 35 kilovolts of one section buses, the two sections bus dead electricity, the protection action of autotomying, instantaneous 35 kilovolt of two/three segmentation 332 switch that close, 35 kilovolt of one/four segmentation 314 switch.
2. utilize database identification fault point:
The set of actions of this fault point is:
{ the positive mother partition 2012 switch separating brakes in first station; No. 1 female connection 2011 switch separating brakes in first station; No. 1 main transformer high-pressure side, first station 2010 switch separating brakes; first station No. 1 main transformer low-pressure side 311 switch separating brakes; first station No. 1 main transformer low-pressure side 312 switch separating brakes; first station 4175 lines, 4175 switch separating brakes; first station 4181 lines, 4181 switch separating brakes; first station 4173 lines, 4173 switch separating brakes; second station 4175 lines, 4175 switch separating brakes; 35 kilovolt of two/three segmentation 332 switch closes a floodgate; 35 kilovolt of one/four segmentation 314 switch closes a floodgate; first station 4181 line CSL-101A tripping operation outlet action; first station 4181 line LFP-902A tripping operation outlet action; the positive female one section differential work of mother of first station REB103; first station 4173 line REL551 (I) protection transfer trip action; first station 4173 line REL551 (II) protection transfer trip action; first station 4175 line REL551 (I) protection transfer trip action; first station 4175 line REL551 (II) protection transfer trip action; second station 4175 line REL551 (I) protection transfer trip action; second station 4175 line REL551 (II) protection transfer trip action, the 35 kilovolts of SEL351 in first station action of autotomying }.
Operating space chain-dotted line institute region as shown in Figure 2.
Set of actions under the current operational mode in this set of actions and the database is mated, and can draw the fault point is between first station 4181 wiretaps and the rheology.
3. visualization technique is confirmed the fault point:
For the 1. fault shown in the joint, can see that by image first station 4181 linear flows become porcelain vase slight crack is arranged.
After concluding the fault point, the grid control centre personnel can start automatic recovery prediction scheme.
4. the fault point isolates:
Isolation processes is: transfer second station 4181 lines to the circuit cold standby, transfer first station 4181 lines to the switching circuit maintenance.
5. non-faulty component electrical network recovers automatically:
After the fault point isolation is finished, transfer the first station to cold standby for positive female one section, utilize positive mother partition 2012 switches in first station to align female one section and charge.
After charging successfully, recover on this bus each loop successively and send.
For each bar circuit,, and cooperate that other grid control centres charge successively, cyclization according to charged side, the cyclization side of scheduling regulation.
No. 1 main transformer high-pressure side 2010 switches in the first of closing station, charge successfully to No. 1 main transformer after, main transformer low-pressure side 311,312 switches that close No. 1 draw back 35 kilovolt of two/three segmentation 332 switch, 35 kilovolt of one/four segmentation 314 switch then, recover the normal mode of connection.Shortened the recovery time of power grid accident like this, greatly.
Because 4181 lines transfer inspecting state to, variation has taken place in operational mode, and the definite value district need be revised in possible some loop, and recovering prediction scheme automatically will switch the definite value district by automatic on-line before combined floodgate send electricity.
6. control is proofreaied and correct in the prevention in the self-healing process:
After non-faulty component recovered, each line did not have overload, and voltage does not have out-of-limit phenomenon yet, need not to proofread and correct control.
Self-healing control compare advantage that traditional manual dispatching and manual operation recover be exactly rapidly, effective, can collect, utilize the information strategy of handling it rapidly more comprehensively, for the cascade tripping of avoiding load transfer to cause has been striven for the time.
The dispatcher utilizes video or image to the affirmation of fault point, can make fault point identification accurately and reliably, avoids causing fault coverage further to enlarge because of handling mistake.
According to the author urban distribution network high-voltage fence event of failure for many years in place is added up discovery, the probability of substance fault and protection correct operation accounts for more than 90%, and the self-healing scheme that this patent proposes is applicable to the situation of substance fault and protection correct operation fully.
Technical solution of the present invention has been described the specific implementation process of supergrid self-healing, the i.e. process of " Fault Identification, visual location, fault point are isolated, electrical network self-recovery ", and pointed out how self-healing control cooperates with control centre's safety and stability nucleus correcting program, and embodiment has shown the validity of this supergrid self-healing scheme.
The present invention has solved the self-healing problem of supergrid preferably, construction that can faster promotion intelligent grid.
Claims (9)
1. the intelligent self-cure monitoring method of a supergrid comprises the switchgear, protective relaying device, scheduling/operations staff and the grid control centre that constitute electrical network, it is characterized in that:
Situations such as no matter A has fault-free to take place, grid control centre cooperates with the safety and stability nucleus correcting program all the time, and whether continuous detection of grid has safety and stability nargin deficiency, and trend, voltage are out-of-limit;
B, when electrical network exists when unusual, grid control centre reply trend distributes and adjusts, and changes by exert oneself size or the ratio of exerting oneself of regulating local each unit, and controls the trend limit;
When zero load transfer ability, carry out network operation structure control decision-making, by modes such as on-line monitoring, check, adjusting reactive-load compensation equipment, circuit switched, distant place power supply input, cutting load, off-the-lines, make supergrid transfer safe condition to;
C, when electrical network has fault to take place, grid control centre carries out self-healing control by following step:
C1, fault message are collected;
C2, utilize set of actions database identification fault point;
C3, employing visualization technique are confirmed the fault point;
C4, execution recover prediction scheme automatically, fault point equipment is carried out system isolate;
C5, non-faulty component electrical network recover automatically;
C6, control is proofreaied and correct in the prevention in the self-healing process;
C7, reenter the safety and stability nucleus correcting program;
The intelligent self-cure monitoring method of D, employing " grid control centre is collected fault message, concluded the fault point, starts automatic recovery scheme according to action message failure judgement point, visualization technique ", solve the self-healing problem of supergrid, prevent to proofread and correct control, utilize the information strategy of handling it rapidly, avoid the cascade tripping that causes because of load transfer, realize the control of appending of electricity net safety stable from the whole network angle, remedy the zone and the deficiency of emergency control measure on the spot.
2. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that the collection of described fault message, comprise the collection of switch changed position and protection action message; Wherein, described switch changed position information comprises everything tripping operation or 500kV, the 220kV, 110kV, the 35kV switch that close a floodgate; Described protection action message comprises main transformer protection, route protection, switch protection, stands with the action message that becomes protection, low tension reactor protection, secondary capacitor protection, and its particular content comprises that protection type, fault localization result and the fault of action protection title, action is separate.
3. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that described set of actions database comprises all 35kV and the above switch changed position information and the protection action message of being correlated with when break down in this fault point, set of actions is kept in the database after all formulating; After fault took place, all protection action message and switch changed position information that relate to the loop of switch changed position all were uploaded to grid control centre, and control centre forms set of actions according to the information of collecting; Then the set of actions of each fault point under this set of actions and the pre-in advance current operational mode of formulating is mated, discern fault.
4. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that described employing visualization technique confirms the fault point, comprise at least that the utilization scene is checked to return clear picture, or pass real-time video back control centre; Pass through the image/video that returns or pass back, the phenomena of the failure such as slight crack of checking earth fault, porcelain vase intuitively.
5. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that describedly fault point equipment is carried out system isolating, after comprising the localization of faults, finish the isolation of fault point according to automatic recovery prediction scheme, transfer faulty equipment to inspecting state, the equipment that will be connected with faulty equipment transfers cold standby state to, so that the sound part of electrical network is resumed operation, also is convenient to faulty component is overhauled simultaneously.
6. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that described automatic recovery prediction scheme comprises that the fault point at each fault point isolates program and non-faulty component automatic recovery program under the various operational modes.
7. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that described non-faulty component electrical network recovers automatically, comprise accident prediction and typical operation ticket according to each transformer station that grid control centre is had jurisdiction over, the recovering step of each non-faulty component in fault point of making is to reduce loss of outage and social influence to greatest extent;
After non-faulty component recovered automatically, variation had taken place in system operation mode, and the definite value district need be revised in some loop, and recovering prediction scheme automatically will switch the definite value district by automatic on-line before combined floodgate send electricity.
8. according to the intelligent self-cure monitoring method of the described supergrid of claim 1; it is characterized in that described to the correction of the prevention in self-healing process control; comprise that N-1 principle in the grid control centre power application system static security analysis method works as the failure predication under the previous mode; under the N-1 state, investigate the load transfer ability; when preventing from other faults take place during this period, electrical network self-protection measure deficiency.
9. according to the intelligent self-cure monitoring method of the described supergrid of claim 1, it is characterized in that described to the correction of the prevention in self-healing process control, comprise grid control centre on-line intelligence aid decision and prevention and control, control and defence are coordinated in realization, the electrical network emergency control of the multiple faults of processing power transmission network and different factory station simultaneous faults, successive failure; When the existing automatic safety device control measure of electrical network are not enough, realize the control of appending of electricity net safety stable from the whole network angle, remedy the zone and the deficiency of emergency control measure on the spot.
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