CN101299532A - Closed-loop self-adaption emergency control method for large electric network ''('centralized coordination, demixing control') '' - Google Patents
Closed-loop self-adaption emergency control method for large electric network ''('centralized coordination, demixing control') '' Download PDFInfo
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Abstract
A closed loop self-adapting emergency control method of power pool' centralized harmonization and hierarchy control' is disclosed, which adopts the quadrilayer structure of a dispatching center station, a control main station, a control sub-station and a control execution station from top to bottom, including the following control steps: 1. safely and stably controlling the system uploading operation data to the dispatching center station; 2. controlling the decision-making computation by the dispatching center station to obtain the online strategy table; 3. sending down the online strategy to the control main station by the dispatching center station and furthermore sending down to the related control sub-station by the control main station; 4.judging the failure and the overload according to the related failure and the overloading criterion by the control sub-station and the execution station; 5. transmitting the failure information to the upper control station layer by layer by the control sub-station and the execution station; 6. performing the failure combination match by the control main station; 7. sending the cutting machine and the cutting load command tot he corresponding control sub-station by the control main station; 8. reprocessing and transmitting to the execution station by the control sub-station; 9. cutting machine and cutting load exit by the execution station.
Description
Technical field
The invention belongs to power system stability control field, the present invention relates to a kind of control method that big electrical network solves catastrophe failures such as multiple faults, cascading failure more precisely.
Background technology
Along with scale of power is huge day by day, the safety and stability problem is increasingly sophisticated, and nature constantly increases with the broken harmfulness of attacking electrical network of social factor.The electric network from collapsing of how avoiding causing because of catastrophe failure and cascading failure is a difficult problem of generally acknowledging.How setting up complete the whole network and coordinate the automatic hierarchy of control of defence, is the summit of world today's power grid security control theory and practice.
The power system safety and stability control system can be divided into Local stabilization system, regional power grid stabilizing control system He Da district interconnected network stabilizing control system three classes at present.
On control structure, generally be provided with a main website, a plurality of substation and actuating station, main website generally is located at hinge electric substation or is in the power plant of hub site, is responsible for gathering the operating condition information at each station, the operational mode of identified region electrical network, and relevant operational mode information is sent to each substation.In real system, do not see four layers of control structure that comprise station, control centre, controlling center, control sub-station and actuating station as yet.
On decision-making mode, the control mode that most of zonal safety stabilization control system all adopts centralized decision-making and disperse policy decision to combine.The disperse policy decision mode is generally adopted in each substation, the control strategy table of oneself is all deposited at each station, when our station outlet and station equipment break down, according to the operational mode before fault type, the accident, make a policy, carry out control on the spot (comprising unit or the load of far cutting the affiliated terminal station of our station) at our station, also can will give main website on the control command, carry out in main website or other substation.Main website adopts the centralized decision-making mode, the control strategy table only leaves in the master station device, the fault message of each substation will on deliver to main website, by the main website centralized decision-making, control command is carried out in main website and relevant substation, control system under the centralized decision-making mode has only one " brain " to judge decision-making, and therefore speed and the reliability to communication is higher than disperseing the decision-making party formula to require, and the difficulty of technology is relatively also bigger.The centralized decision-making mode is used less.But currently used control strategy is primarily aimed at electrical network N-1 fault, and in real application systems, Shang Weijian handles the report of catastrophe failure control strategies such as multiple faults, cascading failure.
Up to now, the application of safety stabilization control system both at home and abroad mainly also rests on the treatment measures at electrical network N-1 fault, the safety and stability control of catastrophe failures such as reply multiple faults, cascading failure still is in conceptual phase, the control structure that the big electrical network of employing proposed by the invention " is concentrated coordination, hierarchical control " is implemented the closed-loop adaptation emergency control also beyond example from the whole network angle.
Summary of the invention
Of the present inventionly be, at the deficiencies in the prior art, the closed-loop adaptation emergency control method that a kind of big electrical network " is concentrated coordination, hierarchical control " is proposed, solve big electrical network local N-2 and the same transient stability problem that causes under the two station N-1 faults of strange land on the electric direction of sending take place, and big electrical network generation circuit N-2 and above tripping operation cause that relevant device transships thermally-stabilised problem.
To achieve these goals, the present invention takes following technical scheme to realize:
Safety stabilization control system adopts the control structure of " concentrating coordination, hierarchical control ", is divided into station, control centre, controlling center, control sub-station and control actuating station four-layer structure from top to bottom.Wherein:
(1) station, control centre
The On-line Control policy calculation is carried out according to the measured data of sending on EMS (EMS) and the stability control device in the station, control centre, issues the On-line Control Policy Table to steady control main website.
(2) controlling center
Controlling center has off-line decision-making mode and two kinds of decision-making modes of on-line decision pattern:
Under the off-line decision-making mode,, carry out samely sending two stations, strange land on the electric direction that stable control under the N-1 fault takes place simultaneously, and local N-2 fault causes the stable control of other station elements overloads according to the off-line Policy Table in the main website; Under the on-line decision pattern, according to the strategy of on-line table in the main website, carry out samely sending two stations, strange land on the electric direction that stable control under the N-1 fault takes place simultaneously, local N-2 fault causes the stable control of other station elements overloads, and surely controls substation off-line controlled quentity controlled variable and append control when not enough.
(3) control sub-station
Steady control substation image data, judge overload, fault and on send steady control main website.For the detected N-2 fault in this locality, carry out steady temporarily and the steady control of heat according to the off-line Policy Table; When our station off-line controlled quentity controlled variable is not enough, receive and carry out the control command of appending that main website sends.
(4) the actuating station function is distributed:
Gather our station unit or load line circuit-switched data, judge that power of the assembling unit size and throwing stop, on give the substation; Execution is from the control command of substation.
The closed-loop adaptation emergency control method that big electrical network " is concentrated coordination, hierarchical control " comprises the following steps:
(1) peace control system uploads service data to central station
During normal the operation, peace control system provides two class data to the central station decision system, the first kind is to be used for the data that trend is calculated and the real-time of decision-making is had relatively high expectations, but P, the Q, the throwing that mainly comprise each element stop information etc., for the cutting load station then be each round cutting load amount, and each round idle, this category information is by special-purpose control channel, send on successively; Second class is the less demanding data of real-time, offer the on-line decision system and be used for reference and supervision, this category information is by electric power data network, on deliver to the peace control system centralized management system at station, control centre, centralized management system sends it to decision system again.
(2) control decision is calculated
Integrated according to peace control data, EMS data, WAMS data etc. by central station, calculate based on the specific fault collection, integrated decision-making obtains the strategy of on-line table.
(3) central station issues strategy of on-line to peace control system
Central station at first issues the strategy of on-line table to main website, the strategy of on-line table comprises N-1 fault and part N-2 fault, for alleviating the main website burden, for the N-2 fault in N-1 fault and the same station, further be issued to relevant substation by main website, when such fault took place, the substation was controlled according to this part strategy of on-line that receives, for the N-2 fault of different factories station element, then carry out Decision Control by main website.
(4) fault judgement
Peace control substation, actuating station all can carry out the differentiation of fault and overload according to relevant fault, overload criterion, and as required, successively send fault message to the last layer control station.
(5) fault upload
Actuating station uploads to the substation with the fault message of judging; The substation with our station declare the fault message that and affiliated actuating station on send fault message, further upload to main website.
(6) fault combinations matches
For the N-2 fault at different factories station, mate in main website.In certain period of time, if two above element faults take place, then main website search conventional online decision table or off-line Policy Table have definition as this N-2 fault in the Policy Table, then search its control strategy, realize control; As the not definition in the Policy Table of this N-2 fault, then do not take measures.
(7) the main website transmitting order to lower levels is to the substation
Main website finds the N-2 fault of coupling and this fault when measure is arranged according to the strategy of on-line table, according to the controlling object of on-line decision or the appointment of off-line strategy and controlled quentity controlled variable or according to certain rule, sends cutter or cutting load order to corresponding substation.During cutter, be sent to the substation by cutter platform number form formula; During cutting load, be assigned to each substation by certain principle, and be sent to the substation by the cutting load amount.In order to guarantee that local control and main website control the adaptability of cutting load, given each substation cutting load amount in the Policy Table.
(8) substation is forwarded to actuating station after handling again
After the substation receives orders, for cutter, if specify the cutter order, then directly send order to the cutter actuating station, if press platform number or cutter order by measure, then, the cutter amount of affiliated cutter actuating station is distributed, send order to subordinate's cutter actuating station respectively according to allocation result again according to the rule of setting in advance.
For the extrusion pressure order, then, the extrusion strength of affiliated cutter actuating station is distributed according to the rule of setting in advance, send order to subordinate's cutter actuating station respectively according to allocation result again.For cutting load order by measure, the actual load situation that take turns according to affiliated each cutting load station 1～16 substation is distributed each actuating station cutting load amount by certain allocation rule, again to each cutting load station send certain round by the order of round cutting load.
(9) actuating station cutter cutting load outlet
After the cutter actuating station is received the cutter order,, then directly excise this unit if specified unit; If by measure or platform count cutter, then select the unit excision of coupling by the rule of setting in advance.
After the cutter actuating station is received the extrusion pressure order, control according to designed interface.
The cutting load actuating station is received and is lower than circuit that puts into operation and can cut and the step-down switch that this takes turns (containing this takes turns) by after the order of round cutting load for all rounds, carries out the tripping operation outlet.
Beneficial effect of the present invention is as follows: adopt the four-layer structure mode to control, realize the organic unity of centralized control and decentralized control, catastrophe failures such as reply electrical network multiple faults, cascading failure realize safety and stability control, solve big electrical network local N-2 and the same transient stability problem that causes under the two station N-1 faults of strange land on the electric direction of sending take place, and big electrical network generation circuit N-2 and above tripping operation cause that relevant device transships thermally-stabilised problem, realizes the closed-loop adaptation emergency control of the whole network with high communication speed and high reliability.
Description of drawings
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is four layers of control structure figure that big electrical network " is concentrated coordination, hierarchical control ".
Fig. 2 is the flow chart of the inventive method specific implementation process.
Fig. 3 adopts this method to realize Jiangsu on the 14th 500kV main grid structure sketch June in 2005 of emergency control effect under the catastrophe failure in order to explanation.
Embodiment
Be a preferred embodiment of the present invention below the embodiment, comprised the closed-loop adaptation emergency control of electrical network under the generation catastrophe failure that adopts method of the present invention to realize.Other feature, purpose and advantage of the present invention also can be found out from the explanation of embodiment and accompanying drawing.
Below in conjunction with a Jiangsu electrical network accident (hereinafter to be referred as 614 accidents) on June 14th, 2005, analyze the detailed process that realizes the closed-loop adaptation emergency control among the EACCS.June in 2005 Jiangsu on the 14th 500kV main grid structure sketch as shown in Figure 2.
Evening on the 14th June in 2005 19:00-21:30, area such as Xuzhou, Suqian, Huaiyin, Lianyun Harbour meets with the attack of thunderstorm, hurricane and hail, cause that 500kV appoints the virgin village of 5237,5238 lines, Suqian 220kV to become the 220kV positive bus-bar, Lianyun Harbour Shuan Hu becomes the tripping operation of 220kV positive bus-bar successive failure, 500kV appoints 5237 circuits to have 10 Ji Ta to fall tower.
Adopt the method invented, safety stabilization control system can effective action and is taken measures as follows:
(1) Transient Stability Control after the local N-2 fault
If appoint village-go up the tripping operation of river double loop generation successive failure, when causing the power of three forts-two nasal mucus double loops and Shuan Si-go up river equal section to exceed the transient stability limit.Before fault took place, station, safety stabilization control system control centre is the corresponding failure mode of simulation in advance, and the On-line Control policy distribution that needs are taked was given stablize controlling center.
The device of appointing village transformer station to stablize control sub-station will in time send to the river to the state information before and after fault message and the accident and stablize controlling center.
Controlling center is stablized according to the fault message received in last river, searches out corresponding control strategy in the control strategy of sending under station, safety stabilization control system control centre, and issues rapidly and take office village transformer station.Appoint the village to become and again control command is issued to relevant power plant cutter actuating station execution cutter.
By the fast processing of safety stabilization control system, will effectively avoid accident treatment to rely on dispatcher's situation fully, accident treatment will be faster, more effective, simpler.
(2) Transient Stability Control that causes of two N-1 in strange land
If appoint village-go up the arbitrary line fault trip of river double loop, the arbitrary line fault trip of Shuan Si-three branch of a river gulf double loop, when causing the power of fort nasal mucus double loop and Shang He-Jiangdu equal section to exceed the transient stability limit.
The forecast failure and the control measure corresponding strategy table that are calculated by the station, control centre are issued to controlling center.Stablize controlling center according to the fault message that send on the control sub-station, search out corresponding control strategy in the control strategy of under station, safety stabilization control system control centre, sending, be issued to the control corresponding substation and appoint the village and Shuan Si.The cutter order that control sub-station issues by controlling center is issued to relevant power plant cutter actuating station and carries out cutter.
(3) control of the local line overload that causes of this earth fault
Adopt the substation to control principle on the spot.
The substation detects many places at same control station and transships the back simultaneously and control in proper order by the cutter of the most serious circuit of overload.
As long as this circuit overload does not disappear and controls round and do not execute, even the overload degree of this circuit is light than All other routes after control, still continue to carry out in proper order by the cutter of this circuit the control of subsequent passes, having disappeared or controlled round up to this circuit overload is finished.
(4) this earth fault causes the control of strange land circuit overload
Adopt main website to coordinate the control principle.
Main website detects many places at different control stations and transships the back simultaneously and control in proper order by the cutter of the most serious circuit of overload.As long as this circuit overload does not disappear and controls round and do not execute, even the overload degree of this circuit is light than All other routes after control, still continue to carry out in proper order by the cutter of this circuit the control of subsequent passes, having disappeared or controlled round up to this circuit overload is finished.
If after this still have other circuit overload, then continue to control in proper order by the cutter of other circuit.Occurring when all there are control measure in substation and main website, following the control sequence of " main website behind the first substation " under the many places while overload situations.
(5) strange land two station N-1 faults cause the control of circuit overload
Adopt main website to coordinate the control principle.
Main website detects many places at different control stations and transships the back simultaneously and control in proper order by the cutter of the most serious circuit of overload.As long as this circuit overload does not disappear and controls round and do not execute, even the overload degree of this circuit is light than All other routes after control, still continue to carry out in proper order by the cutter of this circuit the control of subsequent passes, having disappeared or controlled round up to this circuit overload is finished.
If after this still have other circuit overload, then continue to control in proper order by the cutter of other circuit.
Occurring when all there are control measure in substation and main website, following the control sequence of " main website behind the first substation " under the many places while overload situations.
The present invention is illustrated according to the preferred embodiment of actual emergency control; be to be understood that; but the foregoing description does not limit the present invention in any form, and all employings are equal to the technical scheme that version obtained of replacement or equivalent transformation, all drop within protection scope of the present invention.
Claims (7)
1, the closed-loop adaptation emergency control method that big electrical network " is concentrated and coordinated; hierarchical control ", it is characterized in that the safety stabilization control system employing is divided into the station, control centre from top to bottom, controlling center, the four-layer structure of control sub-station and control actuating station, comprise following controlled step: (1) safety stabilization control system is uploaded service data to the station, control centre, (2) control decision of station, control centre is calculated, obtain the strategy of on-line table, (3) station, control centre issues strategy of on-line to controlling center, further be issued to relevant control sub-station by controlling center, (4) control sub-station, actuating station is according to relevant fault, the overload criterion is carried out the judgement of fault and overload, (5) control sub-station, actuating station successively sends fault message to the last layer control station, (6) controlling center carries out the fault combinations matches, (7) controlling center sends cutter or cutting load order to the control corresponding substation, (8) control sub-station is forwarded to actuating station after handling again, (9) actuating station cutter, the cutting load outlet.
2, the closed-loop adaptation emergency control method of big electrical network according to claim 1 " concentrated coordination, hierarchical control ", it is characterized in that in the described step (6), N-2 fault for different factories station is mated at controlling center, in certain period of time, if two above element faults take place, then controlling center search conventional online decision table or off-line Policy Table have definition as this N-2 fault in the Policy Table, then search its control strategy, realize control; As the not definition in the Policy Table of this N-2 fault, then do not take measures.
3, the closed-loop adaptation emergency control method of big electrical network according to claim 1 " concentrated coordination, hierarchical control ", it is characterized in that in the described step (7), controlling center finds the N-2 fault of coupling and this fault when measure is arranged according to the strategy of on-line table, according to the controlling object of on-line decision or the appointment of off-line strategy and controlled quentity controlled variable or according to certain rule, send cutter or cutting load order to the control corresponding substation, during cutter, be sent to control sub-station by cutter platform number form formula; During cutting load, the cutting load amount is assigned to each control sub-station by certain principle, and is sent to control sub-station, and in the Policy Table given each control sub-station cutting load amount.
4, the closed-loop adaptation emergency control method of big electrical network according to claim 1 " concentrated coordination, hierarchical control ", it is characterized in that in the described step (8), after control sub-station receives orders, for specifying the cutter order, then directly send order, for pressing platform number or cutter order by measure, then according to the rule of setting in advance to the cutter actuating station, cutter amount to affiliated cutter actuating station is distributed, and sends order to subordinate's cutter actuating station respectively according to allocation result again.
5, the closed-loop adaptation emergency control method of big electrical network according to claim 4 " concentrated coordination, hierarchical control " when it is characterized in that cutter, is sent to control sub-station by cutter platform number form formula; During cutting load, be assigned to each control sub-station by certain principle, and be sent to control sub-station by the cutting load amount; For the extrusion pressure order, then, the extrusion strength of affiliated cutter actuating station is distributed according to the rule of setting in advance, send order to subordinate's cutter actuating station respectively according to allocation result again; For cutting load order by measure, the actual load situation that take turns according to affiliated each cutting load station 1～16 substation is distributed each actuating station cutting load amount by certain allocation rule, again to each cutting load station send certain round by the order of round cutting load.
6, the closed-loop adaptation emergency control method of big electrical network according to claim 1 " concentrated coordination, hierarchical control " is characterized in that in the described step (9), after the cutter actuating station is received the cutter order, if specified unit, then directly excises this unit; If by measure or platform count cutter, then select the unit excision of coupling by the rule of setting in advance.
7, the closed-loop adaptation emergency control method of big electrical network according to claim 6 " concentrated coordination, hierarchical control ", after it is characterized in that the cutter actuating station is received the extrusion pressure order, control according to designed interface, the cutting load actuating station is received by after the order of round cutting load, is lower than this circuit that puts into operation and can cut of taking turns and step-down switch execution tripping operation outlet for all rounds.
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| CN107134787B (en) * | 2017-06-23 | 2019-10-18 | 国网江苏省电力公司电力科学研究院 | Cutting load control system and cutting load method based on distributed feeder automation |
| CN107703926A (en) * | 2017-11-13 | 2018-02-16 | 国网江苏省电力公司电力科学研究院 | A kind of network system protects fast cut back multi-point control time method of testing |
| CN108767856A (en) * | 2018-06-27 | 2018-11-06 | 广东电网有限责任公司 | A kind of general stabilized control system and its control method |
| CN110021998A (en) * | 2019-03-22 | 2019-07-16 | 北京四方继保自动化股份有限公司 | Security and stability control master information exchange method suitable for large scale electric network |
| CN110086211A (en) * | 2019-05-06 | 2019-08-02 | 国家电网公司东北分部 | High frequency centralized control method suitable for extensive AC-DC hybrid power grid |
| CN110445107A (en) * | 2019-07-25 | 2019-11-12 | 国网河北省电力有限公司衡水供电分公司 | Processing method for 110kV line fault tripping |
| CN110445107B (en) * | 2019-07-25 | 2021-09-07 | 国网河北省电力有限公司衡水供电分公司 | Processing method for 110kV line fault tripping |
| CN110571767A (en) * | 2019-08-15 | 2019-12-13 | 南京国电南自电网自动化有限公司 | method and system for improving performance of stability control system based on relay protection information |
| CN111314382A (en) * | 2020-03-20 | 2020-06-19 | 国家电网公司东北分部 | Network safety protection method suitable for high-frequency emergency control system |
| CN111314382B (en) * | 2020-03-20 | 2022-07-22 | 国家电网公司东北分部 | Network safety protection method suitable for high-frequency emergency control system |
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