CN103296677B - A kind of online bulk power grid recovers aid decision-making system - Google Patents

A kind of online bulk power grid recovers aid decision-making system Download PDF

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CN103296677B
CN103296677B CN201310169694.7A CN201310169694A CN103296677B CN 103296677 B CN103296677 B CN 103296677B CN 201310169694 A CN201310169694 A CN 201310169694A CN 103296677 B CN103296677 B CN 103296677B
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module
black starting
path
power supply
power
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CN201310169694.7A
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CN103296677A (en
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邹昱
郎燕生
史成广
赵昆
白洋
陈立杰
刘升
邢颖
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国家电网公司
中国电力科学研究院
福建省电力有限公司
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Abstract

The present invention relates to a kind of online bulk power grid and recover aid decision-making system, system comprises real-time auxiliary mode and researchs and analyses pattern two kinds of mode of operations, comprises section Operations Analyst module: read and cross section regulation for section; Calculate configuration module: to arrange for calculating parameter, black starting-up Power Selection and be activated Power Selection; Computing function module: for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment; Management of computing module: the display generating scheme for system partitioning scheme, voltage waveform, available path rank and black starting-up.Application the present invention develops online power system recovery auxiliary decision-making support system, control centre's available data resource can be made full use of, combine the advantage of prediction scheme restoration methods and intelligent scheduling, without the need to modeling again, reduce system Construction time and cost, improve real-time and the accuracy of decision recommendation, for the fast and reliable after electrical network large-scale blackout is recovered to provide strong support.

Description

A kind of online bulk power grid recovers aid decision-making system

Technical field

The present invention relates to field of power, be specifically related to a kind of online bulk power grid and recover aid decision-making system.

Background technology

Since electric power system occurs, massive blackout accident happens occasionally, and along with the expansion of electric power system scale, its frequency occurred is more aobvious frequently, impact is more severe.On August 3rd, 1996 the Malaysian whole nation have a power failure on a large scale, on January 21st, 2002 Brazilian capital region have a power failure on a large scale, on August 14th, 2003 beautiful ash moss, on May 25th, 2005 Russia have a power failure on a large scale, on September 26th, 2005 Hainan the whole province have a power failure on a large scale, on September 15th, 2011 Korea S to have a power failure on a large scale and India in 30 days July in 2012 that number that history affects is maximum has a power failure on a large scale, influenced more than 6.7 hundred million people.Massive blackout brings huge economic loss to the mankind, has had a strong impact on the life of people, and may cause social unrest to a certain extent.The theoretical research of electric power system large-scale blackout shows: always exist with small probability the generation of having a power failure on a large scale any one electric power system, and probability of happening and influence degree increase along with the expansion of system scale, the large-scale blackout of electric power system is difficult to avoid.After electrical network generation large-scale blackout, fast recovery of power supply system tool is of great significance.

Current, the usual way of domestic and international power system blackstart studies and defines out feasible black starting-up prediction scheme by experienced management and running expert in advance according to the concrete condition of system, or calculate feasible black starting-up prediction scheme by off-line system, help dispatcher's recovery system when system blackout to run.Its advantage have passed through a large amount of security verification when being prediction scheme formulation, and general all can organizing carries out black startup test, related personnel therefrom can run up to valuable experience, participate in each side of System recover, comprise the staff of scheduling institution, power plant and transformer station, comparatively familiar to prediction scheme, can large-scale blackout occur after System recover in ruly press scheduled operation execution.As long as reality meets prediction scheme condition, performing black starting-up prediction scheme is quick, safety, Trusted recovery system power supply reliable fashion.Its shortcoming is that off-line system modeling work amount is large, the experience of expert and off-line system model often can not radical actual electric network changes in time, and the accident in recovery process may make the partial content in prediction scheme no longer feasible with some uncontrollable factors (as the electric power facility damage etc. that overhaul of the equipments stoppage in transit, equipment fault, natural calamity cause).In the face of new situation, dispatcher needs the analysis doing large amount of complex can determine new recovery scheme, easily cause the interruption of black starting-up process, incur loss through delay even failed.

" 12 " period, national grid will build up North China, East China, Central China (" three China ") extra-high voltage grid, form the ultra high voltage rack of " three vertical three horizontal looped networks ".The extra-high voltage alternating current-direct current series-parallel connection bulk power grid that electric pressure is the highest in the world, transmission capacity is maximum, technical merit is most advanced, operation characteristic is the most complicated is formed.Simultaneously, along with electrical network scale is increasing, management and running information becomes increasingly complex, and technical merit and the complexity of electrical network are more and more higher, the difficulty of power dispatch system operation and management is also increasing, also even more complex and the difficulty of the power system restoration solution formulation after massive blackout accident.State Grid Corporation of China leading under, the research and development of intelligent grid supporting system technology have achieved interim achievement, and a provincial scheduling institution of net is applied more than 20.System is followed " horizontal integrating, longitudinal direction are through " and the design concept of " source maintenance, the whole network are shared ", and integrated basic platform constructs four large classes application, and integrated scheduling provides technical support.Its research and development and pilot application significantly improve scheduling institution overall application level at different levels, for intelligent grid scheduling provides strong technical support, bring huge economic and social benefit simultaneously.

Enhance integration in the designing and developing of intelligent grid supporting system technology, in linearize, become more meticulous, practical, visual and intelligentized thought, unified technical standard and functional specification are followed in design and research and development.By working out the technical specifications such as electrical network universal model Naming conventions, electric network model Description standard, grid graph Description standard, for all software provides unified data-interface and model specification, this is the research of black starting-up model data, the design of real time data interaction schemes, Software for Design exploitation etc. provide unified technical standard, for solid foundation has been established in the software development of online bulk power grid black start assistant decision making.

The online power system recovery auxiliary decision technology possessing adaptive ability based on intelligent grid supporting system technology has quite high safety and reliability, and good adaptability and interactivity, the bulk power grid black starting-up prediction scheme that can be under complex environment is formulated provides effectively auxiliary, alleviate dispatcher's work load, also can at any time according to the system mode in recovery process, rapid adjustment is carried out to recovery policy, adapt to various unexpected change, escort for the rear fast quick-recovery of system safety occurs large-scale blackout.

Summary of the invention

For the deficiencies in the prior art, the object of this invention is to provide a kind of online bulk power grid and recover aid decision-making system, application the present invention develops online power system recovery auxiliary decision-making support system, control centre's available data resource can be made full use of, combine the advantage of prediction scheme restoration methods and intelligent scheduling, without the need to modeling again, reduce system Construction time and cost, improve real-time and the accuracy of decision recommendation, for the fast and reliable after electrical network large-scale blackout is recovered to provide strong support, adopt the data-interface based on intelligent grid supporting system technology specification and man-machine exhibition scheme, there are wide market prospects.

The object of the invention is to adopt following technical proposals to realize:

A kind of online bulk power grid recovers aid decision-making system, and its improvements are, described system comprises real-time auxiliary mode and researchs and analyses pattern two kinds of mode of operations, and described system comprises:

Section Operations Analyst module: read and cross section regulation for section, comprises and recovers target section read module, in real time section read module, Research foundation section read module, research cross section regulation module and section recovery module;

Calculate configuration module: to arrange for calculating parameter, black starting-up Power Selection and be activated Power Selection, comprise parameter setting module, black starting-up Power Selection module and be activated Power Selection module;

Computing function module: for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment, comprise system partitioning module, Load flow calculation module, EM transient calculation module, electromechanical transient computing module and route searching and evaluation module;

Management of computing module: the display generating scheme for system partitioning scheme, voltage waveform, available path rank and black starting-up, comprises waveform display module.

Wherein, under real-time auxiliary mode, described section operational module recovers target section and real-time section for reading; Researching and analysing under pattern, described section read module is for reading Research foundation section and recovering target section and carry out research cross section regulation and section recovery;

Read and recover target section by recovering the realization of target section read module, comprising: read from the section storehouse of system and specify section as the target section recovered, for analytical calculation provides load value and the system running state of each load bus needed for optimization;

Read real-time section to be realized by real-time section read module, comprising: reading system SCADA applies measurement and the state of lower all devices, obtains system cloud gray model present situation;

Read Research foundation section to be realized by Research foundation section read module, comprising: read from the section storehouse of system and specify section as the basic section researched and analysed;

Research cross section regulation realizes by studying cross section regulation module, comprise: carry out arranging (comprising equipment running status setting, switch and disconnecting link status set, unit output and load power size to arrange) at Research foundation section, obtain the system mode after simulating large-scale blackout generation, i.e. black starting-up problem initial state, this initial state is called research section;

Section recovers to recover module by section and realizes, and comprising: the state of (the last research cross section regulation module called before) before Research foundation section is reverted to last cross section regulation.

Wherein, at real-time auxiliary mode with under researching and analysing pattern, described calculating configuration module is all arranged for calculating parameter, black starting-up Power Selection and be activated Power Selection;

Calculating parameter arranges and is realized by parameter setting module, and described parameter comprises for describing route searching rule and the calculating parameter for path evaluation sequence, and computation schema is selected, the controling parameters of result storing path;

Black starting-up Power Selection is chosen module by black starting-up and is realized, the black starting-up power supply adopted when described black starting-up Power Selection is and specifies for researching and analysing;

Be activated Power Selection to realize by being activated Power Selection module, described in be activated Power Selection be used to specify research and analyse or auxiliary in real time time be activated power supply really.

Wherein, under real-time auxiliary mode, described computing function module is used for Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment; Researching and analysing under pattern, described computing function module is used for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment;

Load flow calculation is realized by Load flow calculation module, comprises the direction of energy distribution situation in designated model;

EM transient calculation is realized by EM transient calculation module, adopts EMTP kit to carry out electromagnetic transient analysis and obtains operating voltage check results;

Electromechanical transient calculates and is realized by electromechanical transient computing module.

Wherein, route searching is realized by route searching and evaluation module with assessment, and route searching selects from black starting-up power supply to the path being activated power supply combination property optimum;

Described route searching and evaluation module comprise restoration path generation module and black starting-up coordinates measurement to guide module;

Generate black starting-up restoration path to comprise the steps:

I, determine to be activated power supply: described in be activated power acquisition fired power generating unit;

II, adopt rule-based initial path searching algorithm, obtain from black starting-up power supply to the feasible electrical path being activated power supply; Described initial path searching algorithm follows following rule:

1) voltage transitions number of times restriction principle: control the voltage transitions number of times in black starting-up process;

2) path restriction principle: restriction black starting-up restoration path length;

3) plant stand restriction principle;

4) capacity limits principle: when being activated unit starting, required minimum load is less than and starts exerting oneself of unit, and recovers jumbo unit;

5) important load priority principle;

6) minimal time principle: select the unit being in hot stand-by duty;

7) loop principle is avoided: in the path being activated unit, there is not loop from starting unit.

III, filter out the electrical path verified by feasibility: the Interventions Requested of described feasibility verification comprise: the verification of generator self-excitation, low-frequency oscillation verification, power-frequency overvoltage verification, switching overvoltage School Affairs electric voltage frequency stability verify;

IV, determine from black starting-up power supply to the path being activated power supply combination property optimum, be optimized database restore path: all black starting-up restoration paths verified by feasibility are assessed and sorted, selects from black starting-up power supply to the path being activated power supply combination property optimum; Evaluation index comprises to be selected voltage transitions number of times, path, start-up time, is activated unit capacity, technology verifies good and bad degree and is activated the priority level of power supply, and it is obtain suing for peace after generator self-excitation, power-frequency overvoltage multiple, switching overvoltage multiple, variation, frequency shift (FS) normalization that technology wherein verifies good and bad index.

Wherein, described system partitioning is the power system blackstart subregion based on fuzzy cluster analysis, is realized by system partitioning module, and described system partitioning is realized by following steps:

(1) raw data matrix of electrical distance between each node of reflection and each black starting-up power supply is set up:

Electrical distance between defined node i and black starting-up power supply j is:

L ij = Σ k = 1 l ω ij ( k ) r ij ( k ) ′ ①;

Wherein, r ij (k)for weighing a kth desired value of electrical link power, r ij (k)' be numerical value after its standardization, r max, r minbe respectively r ij (k)corresponding to maximum, the minimum value of different i; ω ibe the weights of i-th index; L represents index number, is taken as 3; I=1,2 ..., m, j=1,2 ..., n; Node comprises and is activated power supply, transformer station and load bus;

If with the node of the m in electrical network for object of classification, black starting-up power supply number is n, then the electrical distance between node i and black starting-up power supply j forms individual features index, each element namely in raw data matrix:

x ij=L ij②;

Then set up raw data matrix X=(x ij) m × n; Wherein i=1,2 ..., m, j=1,2 ..., n

(2) standardization is carried out to element each in described raw data matrix: adopt extreme difference standardized method to carry out standardization to raw data matrix, its expression formula is:

y ik = x ik - min 1 ≤ i ≤ m { x ik } max 1 ≤ i ≤ m { x ik } - min 1 ≤ i ≤ m { x ik } , ③;

Wherein: k=1,2 ..., n;

(3) demarcate object to be sorted, set up fuzzy similarity matrix:

Set up fuzzy similarity matrix and be also called demarcation, refer to the statistic r marking and weigh and be classified similarity degree between object ij; If domain X={x 1, x 2..., x m, x i=(x i1, x i2..., x in), then x iwith x jsimilarity degree be r ij=R (x i, x j), i, j=1,2 ..., m;

Absolute exponent method is adopted to solve r ij, its expression formula is:

r ij = exp ( - c Σ k = 1 n | y ik - y jk | ) ④;

Wherein: c is positive number, its value is 0≤r ij≤ 1;

(4) apply Transitive Closure Method and cluster carried out to each object, obtain the system partitioning scheme of corresponding different threshold value:

Choose suitable threshold value λ ∈ [0,1], according to as shown in the formula the λ-Level Matrix 5. asking for fuzzy matrix R obtain the partition scheme of corresponding different λ value, be:

r ij ( &lambda; ) = 1 , r ij &GreaterEqual; &lambda; 0 , r ij < &lambda; , ⑤;

For x i, x j∈ X, if , then in threshold value λ level by object x iwith object x jbe classified as same class; For different threshold value λ, according to R λclassify, the classification obtained is exactly the equivalence classification in λ level, i.e. the system partitioning scheme of corresponding different threshold value;

(6) carry out merging and the adjustment of system partitioning with reference to power grid"black-start" power distribution and trend check results, obtain final black starting-up partition scheme.

Wherein, rule below combination in black starting-up subregion process:

(1) control the voltage transitions number of times in black starting-up process, reduce the empty voltage out-of-limit filling circuit and cause;

(2) constrained Path length reduces the capacitive load that circuit is formed, and reduces the probability of generator generation self-excitation;

(3) the plant stand quantity limiting process in black starting-up process reduces recovery operation, reduces the risk of scheme and shortens start-up time.

Compared with the prior art, the beneficial effect that the present invention reaches is:

1, online bulk power grid provided by the invention recovers aid decision-making system, can be used for all kinds of verify calculation when provincial and above scale Black-start Schemes of Electric Power Grid is formulated, also can be used for large-scale blackout occur after the scheme verification of system recovery procedure and the outer optimal path generation of scheme etc.

2, real-time mode method remains dispatcher when adopting traditional prediction scheme formula System recover scheme, the advantage that power plant and substation equipment operator are comparatively familiar with, with the method for science, prediction scheme formulation is instructed and assisted, alleviate the working strength that prediction scheme formulates personnel, embody the rapidity of power system recovery aid decision, accuracy and reliability, simultaneously can be rapid for power network development, it is inconsistent that actual conditions and prediction scheme imagine situation, prediction scheme relates to the shortcomings such as restoration path is infeasible, after electrical network large-scale blackout occurs, make full use of already present remote signalling in dispatch automated system, the real time datas such as remote measurement and power network topology information, check the feasibility of predetermined scheme, and quick generating power system recovers optimal path and scheme when predetermined scheme is unavailable, auxiliary dispatching operations staff carries out system resumes operation, farthest shorten interruption duration, reduce the loss brought that has a power failure, improve power supply demonstrated capacity.Adopt TipWizard module, be convenient to the upper manual manipulation of researcher.TipWizard module is included in route searching and evaluation module, for route searching and assessment prepare calculating parameter, then calls route searching and assessment in the final step of this guide.

3, research mode method integration General Electric Network black-start scheme formulates almost whole compute type that may to relate to, and add bulk power grid recover distinctive sub area division calculate, also possesses scheme rough draft systematic function, the results conversion that its analytic process produces can be scheme rough draft by user of service easily, greatly saves Different Results integrating documents to time overhead together.Adopt coordinates measurement guide, can avoid because some setting is omitted and bring the inaccurate situation of result to occur.Section storehouse abundant in research cross section regulation function combined with intelligent dispatching of power netwoks technology support system, for user of service provides sufficient research material.Under research mode, each step result of calculation is preserved complete, the correctness of personnel's verification computation result easy to use.

4, system adopts intelligent grid supporting system technology (SG-OSS) multinomial achievement in research, stream compression, system architecture and data-interface meet the requirement of intelligent grid supporting system technology relevant criterion comprehensively, can be applied to more than 20 provincial control centre quickly and easily.Make full use of the existing resource in SG-OSS, reduce construction period and cost.

Accompanying drawing explanation

Fig. 1 is the functional structure chart under real-time auxiliary mode provided by the invention;

Fig. 2 is the functional structure chart researched and analysed under pattern provided by the invention;

Fig. 3 is that initial section provided by the invention reads surface chart;

Fig. 4 is that target section provided by the invention reads surface chart;

Fig. 5 is that power failure range provided by the invention arranges surface chart;

Fig. 6 is black starting-up Power Selection surface chart provided by the invention;

Fig. 7 is black starting-up optimum configurations surface chart provided by the invention;

Fig. 8 is that black starting-up coordinates measurement guide provided by the invention confirms surface chart;

Fig. 9 is that the power supply that is activated in black starting-up coordinates measurement guide provided by the invention selects surface chart;

Figure 10 is electromagnetic transient analysis result oscillogram provided by the invention;

Figure 11 is SG-OSS basic platform hierarchical chart provided by the invention;

Figure 12 is real-time auxiliary mode workflow diagram provided by the invention;

Figure 13 provided by the inventionly researchs and analyses work pattern flow chart.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.

The object of this invention is to provide a kind of online power system recovery aid decision-making system, this system can obtain electric power system topological connection relation and device parameter by dispatch automated system, for recovery scheme when bulk power grid has a power failure provides Directed by divisions and the suggestion of black starting-up power source planning, also can after generation large-scale blackout, in the disabled situation of black starting-up prediction scheme, obtain real-time grid state in time and recover target, by the topological analysis to initial operating state, rational black starting-up power supply in selecting system, automatic search generates black starting-up power supply to the initial path be activated between power supply, all paths by every verification are assessed and sorted, select combination property preferably path, for dispatcher's reference, the final black starting-up path adopted is decided by dispatcher, and real-time tracking system recovering process, load restoration optimization order is provided in conjunction with load restoration target, dispatcher is assisted to recover possible system power supply as early as possible, lighten the load the extent of damage.Apply method of the present invention and develop online power system recovery auxiliary decision-making support system, control centre's available data resource can be made full use of, combine the advantage of prediction scheme restoration methods and intelligent scheduling, without the need to modeling again, reduce system Construction time and cost, improve real-time and the accuracy of decision recommendation, for the fast and reliable after electrical network large-scale blackout is recovered to provide strong support, adopt the data-interface based on intelligent grid supporting system technology specification and man-machine exhibition scheme, there are wide market prospects.

Below term is described:

1) black starting-up: whole system is because of after fault stoppage in transit, do not rely on the help of other networks, by having the startup of self-startup ability unit in system, driving the unit of non self starting to expand the scope of System recover gradually, finally realizing the process of the recovery of whole system.

2) black starting-up power supply: refer to whole system because of fault collapse stoppage in transit be in entirely " black " state time, do not rely on external electrical network, self there is the unit of self-startup ability.Black starting-up power supply is chosen usually: Hydropower Unit, gas turbine, HVDC light system, generation of electricity by new energy, little unit Active Splitting are isolated island etc.

3) restoration path: the sequencing that each node (power plant, transformer station etc.) recovers.

4) section: divided data section and model section.Data section refers to the operation conditions description collections of all devices in a certain moment electrical network.If the 2013-02-2619:45:02 information that section comprises second is in this moment electrical network, all circuits, transformer, capacity reactance device, unit pass through meritorious, idle, the voltage of all buses, the folding condition of all circuit breakers and disconnecting link, and the running status of each equipment (normally, maintenance, stoppage in transit, fault etc.); Model section refers to the parameter of all devices in a certain moment electrical network and all annexations.If section mentioned in this article does not directly indicate, then it has the implication of data section and model section simultaneously.

5) feasibility verification: verify the initial path that automatic search generates, deletes the path not meeting verification.Mainly comprise: self-excitation verification, switching overvoltage verification, electric voltage frequency skew etc.

6) self-excitation verification: at the black starting-up initial stage, system is made up of startup power supply, step-up transformer and idle load long line, in system, capacity current is larger, this easily produces black starting-up power supply self-excitation problem, terminal voltage and the capacitance current of generator constantly increase, cause generator overvoltage and overcurrent, the stator end of generator is seriously generated heat.Therefore, self-excitation problem becomes a major issue of black starting-up power supply.Power supply does not produce self-excitation condition:, being wherein generator d-axis reactance, is step-up transformer leakage reactance, is the equivalent capacitive reactance of nonloaded line.When this condition does not meet, selected black starting-up power supply is satisfied does not produce self-excitation requirement, need select black starting-up power supply else.Self-excitation condition is the major issue that black starting-up power supply is selected, and is also one of important indicator of path evaluation.

7) switching overvoltage verification: consider to carry out in black starting-up process, after each switch closes successively on path, after respective bus bars sky fills, whether transient state is out-of-limit for busbar voltage.Its implementation, when each bar bus closes a floodgate on path, by carrying out electromagnetic transient simulation analysis to it, and obtains transient voltage, and compare to the permission transient voltage value of code defined and obtain corresponding evaluation.

8) evaluation index: comprehensive performance evaluation and sequence are carried out to all feasible paths, to pick out optimum, and the feasible path of suboptimum.Usually choose voltage transitions number of times, path, start-up time, be activated unit capacity, technology verifies good and bad degree and 6 indexs such as the priority level being activated power supply, it is sue for peace after normalization to every technology check results to obtain that technology wherein verifies good and bad index.

9) main grid structure recovers: according to the black starting-up power supply generated to the critical path be activated between power supply, the main force's generating set progressively in start up system, important transformer station and part transmission line carry out progressively recovery system main grid structure.This part saddlebag is containing two parts: one is set up target net, and two is establish concrete recovery order.

10) load restoration: when fired power generating unit is own through starting and having certain generating capacity, and after having set up comparatively stable rack, start the stage of recovering load gradually.Load restoration stage main target recovers load as much as possible as soon as possible, constraints mainly comprise voltage, circuit, transformer thermally-stabilised, and system frequency.

11) Network topology: according to connectivity and the power supply state of real-time device state analysis grid equipment, and form bus model to support senior application function and to show connection on a user interface.Network topology is the prerequisite starting route searching and path technique verification.Power Network Topology Analysis important requirement is exactly real-time and rapidity, when the position of circuit breaker, disconnecting link changes, can provide the topological analysis result of electrical network at once, and the topology coloring of electrical network changes at once.

Online bulk power grid provided by the invention recovers aid decision-making system, and comprise real-time auxiliary mode and research and analyse pattern two kinds of mode of operations, described system comprises:

Section Operations Analyst module: read and cross section regulation for section, comprises and recovers target section read module, in real time section read module, Research foundation section read module, research cross section regulation module and section recovery module;

Calculate configuration module: to arrange for calculating parameter, black starting-up Power Selection and be activated Power Selection, comprise parameter setting module, black starting-up Power Selection module and be activated Power Selection module;

Computing function module: for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment, comprise system partitioning module, Load flow calculation module, EM transient calculation module, electromechanical transient computing module and route searching and evaluation module;

Management of computing module: the display generating scheme for system partitioning scheme, voltage waveform, available path rank and black starting-up, comprises waveform display module.

Functional structure under real-time auxiliary mode is as Fig. 1, once enter real-time mode, to periodically calculate current trend, technology verification will be carried out to this operation after the recovery operation carried out is wanted in dispatcher's appointment, if verification is not passed through, can with preoperative band electrical nodes for starting point, carry out route searching to be activated power supply for terminal, and all paths searched out are verified, assess and sorted, provide optimal path for dispatcher's reference.

Research and analyse functional structure under pattern as Fig. 2, its calculate configuration and computing function consistent with real-time mode, section reading aspect reads real-time section function and becomes reading Research foundation section and research cross section regulation function, add section restore funcitons, result of calculation display then comprises voltage waveform displaying, available path rank, black-start scheme generate.Under research mode, the interaction point of system and user is a lot, and each computing module is also relatively independent, and the flow chart not as real-time auxiliary mode, now provides schematic flow sheet as accompanying drawing 2.Which show the fundamental operation step for obtaining required for a certain class result, and the general contents that some data or calculating comprise.

One, section reads:

Under real-time auxiliary mode, described section operational module recovers target section and real-time section for reading; Researching and analysing under pattern, described section read module is for reading Research foundation section and recovering target section and carry out research cross section regulation and section recovery;

Read and recover target section by recovering the realization of target section read module, comprising: read from the section storehouse of system and specify section as the target section recovered, for analytical calculation provides load value and the system running state of each load bus needed for optimization; Its interface is as Fig. 4.

Read real-time section to be realized by real-time section read module, comprising: reading system SCADA applies measurement and the state of lower all devices, obtains system cloud gray model present situation.

Read Research foundation section to be realized by Research foundation section read module, comprising: read from the section storehouse of system and specify section as the basic section researched and analysed; Its interface is as Fig. 3.

Research cross section regulation realizes by studying cross section regulation module, comprise: carry out a series of setting (comprising equipment running status setting, switch and disconnecting link status set, unit output and load power size to arrange) at Research foundation section, obtain the system mode after simulating large-scale blackout generation, i.e. black starting-up problem initial state, this initial state is called research section;

Section recovers to recover module by section and realizes, and comprising: the state of (the last research cross section regulation module called before) before Research foundation section is reverted to last cross section regulation.

Two, cross section regulation:

Research cross section regulation: carry out a series of setting at Research foundation section, the system mode after occurring with the large-scale blackout obtaining simulating and the initial state of black starting-up problem, this initial state is also referred to as research section.

Section recovers: research section is reverted to the state before last cross section regulation.

It is the important subfunction researching and analysing System recover aid decision under pattern that research section is arranged, mainly through the power failure range setting that realizes the switching action of circuit breaker and send to unit the injection rate adjustment function that power and payload arrange and realize.Injection rate adjustment can realize on plant stand figure, and power failure range arranges interface as Fig. 5, and it is described as follows:

1, power failure range is arranged.The tree of power failure range setting area generated according to region affiliation relation in electric network model, and the equipment under plant stand only shows circuit breaker and disconnecting link two kinds of equipment.Initial condition is for entirely to select state.When choosing a certain node, its child node also can be checked, and after the state of choosing of its a certain child node is cancelled, the child node of this node, this node and the selected state of all parent nodes thereof all should be cancelled.Click counter select button after, state of the choosing negate of all nodes, click and arrange button and then the quality position of all selected disconnecting links and circuit breaker can be divided, the line topological that all plant stands be checked connect is painted changes white into.Search the function of input frame and black starting-up power supply to arrange and search input frame functional similarity in interface, after searching the equipment in combobox in elected, the node of its correspondence should be selected in dendrogram, and dendrogram launches.

2, data section obtains.Click after obtaining initial section or select target section button and all ejections section is arranged interface, difference is that the initial state that the section of ejection arranges interface has difference.Initial section is loaded in real-time data base on the one hand, will stay an end on the other hand, and the section in real-time database can change with operation or upgrades with digital & analog signal and change.Target section also takes out, but is not loaded in real-time database, describes in detail and sees data section fetching portion.

3, clicking the routine processes after arranging button is carry out on the initial section basis obtained.

4, for specifying plant stand to restore electricity.In the list of power failure plant stand, choose the plant stand wanting to remove from power supply interrupted district, click recovery button, then the remote signalling state of all switch tools in this plant stand sets by the value in initial section.

5, certain shows corresponding with real-time database in power failure plant stand list, what show in this interface is that in this table, " whether having a power failure " territory is the record of 1, the often row read all comprises unique identification id, allow to modify to startup priority level territory, if amendment, clicking this value when refreshing will be updated in table corresponding in relation storehouse.

What 6, outage information had a guide look of the display of every data is the comparison result of current system conditions and initial section, performs this comparison when click refresh button.

Three, configuration is calculated:

At real-time auxiliary mode with under researching and analysing pattern, described calculating configuration module is all arranged for calculating parameter, black starting-up Power Selection and be activated Power Selection;

Calculating parameter arranges and is realized by parameter setting module, the object that parameter setting module can be arranged be included in that last joint mentions for describe route searching rule and for the calculating parameter of path evaluation sequence, also comprise the control class parameters such as computation schema selections, result storing path.Optimum configurations interface is as Fig. 7.

Black starting-up Power Selection is chosen module by black starting-up and is realized, the black starting-up power supply adopted when namely black starting-up Power Selection specifies for researching and analysing, when real-time mode without the need to artificial appointment, system, by the unit judging to put into operation at first in power supply interrupted district or bus, locates the black starting-up power supply of native system when carrying out when time black starting-up with this.As indicated with 6, the content in its list is the unit that system possesses that the unit of black start-up ability, converter, interconnection and supposition have black start-up ability at the interface of black starting-up Power Selection.

Be activated Power Selection to realize by being activated Power Selection module, be activated power supply select to be used to specify want to research and analyse or auxiliary in real time time be activated power supply really, its interface and black starting-up power supply are selected similar.

Four, computing function module:

Under real-time auxiliary mode, described computing function module is used for Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment; Researching and analysing under pattern, described computing function module is used for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment;

Load flow calculation is realized by Load flow calculation module, comprises the direction of energy distribution situation in designated model; Real-time from black starting-up power supply to the black starting-up process being activated power supply, force device progressively joins one by one electrically lives in island, and the model thus calculating trend needs dynamically to generate.The black starting-up restoration path that trend module can be specified according to user and want the bus studied to generate corresponding computation model, result of calculation is used for power-frequency overvoltage verification; Under real-time mode, also can calculate the Real-time Power Flow of electric power system in recovery, control for system voltage frequency stability.

EM transient calculation is realized by EM transient calculation module, adopts EMTP kit to carry out electromagnetic transient analysis and obtains operating voltage check results; There is a large amount of breaker operator in black starting-up process makes circuit and transformer by not charged to electriferous state, and this process may produce switching overvoltage thus damage equipment, thus needs to carry out switching overvoltage verification.Native system adopts EMTP kit to carry out electromagnetic transient analysis to obtain operating voltage check results.The basic function of EMTP program carries out electric system simulation calculating, typical apply is prediction electric power system time dependent rule of interested variable after certain disturbance (as switch on-off or fault), is just being suitable for the switching overvoltage check problem analysis of black starting-up process.

Electromagnetic transient analysis result can embody the voltage response of system when circuit or transformer put into operation, whether the maximum voltage in verification response process exceedes limit value, also path evaluation sequence is participated in as an index, its result is also expressed in graph form by curve display module, as shown in Figure 10.

Electromechanical transient calculates and is realized by electromechanical transient computing module.Electromechanical transient is analyzed, the transient stability after main research electric power system is subject to large disturbances and the steady stability performance after being subject to microvariations.Wherein transient stability analysis is that research electric power system is subject to such as short trouble, excision circuit, generator, load, under generator loses the effect of the large disturbances such as excitation or impact load, and the ability that the dynamic behaviour of electric power system and maintenance synchronism stability run.In black starting-up process, it is black starting-up recovery process initial stage the most key factor that the auxiliary system being activated power supply can move up via black starting-up Power supply belt.Impact auxiliary system is equivalent to impact induction-motor load, is suitable for adopting electromechanical transient analysis.According to electromechanical transient analysis principle, write electromechanical transient routine analyzer, shown itself and PSASP(PowerSystemAnalysisSoftwarePackage Based on Power System Analysis Software Package in the result of example network analysis) result consistency better.

Five, route searching and assessment:

Route searching is realized by route searching and evaluation module with assessment, and route searching selects from black starting-up power supply to the path being activated power supply combination property optimum;

Described route searching and evaluation module comprise restoration path generation module and black starting-up coordinates measurement to guide module;

Generate black starting-up restoration path to comprise the steps:

I, determine to be activated power supply: described in be activated power acquisition fired power generating unit.

II, adopt rule-based initial path searching algorithm, obtain from black starting-up power supply to the feasible electrical path being activated power supply; Described initial path searching algorithm follows following rule:

1) voltage transitions number of times restriction principle: control the voltage transitions number of times in black starting-up process;

2) path restriction principle: restriction black starting-up restoration path length;

3) plant stand restriction principle;

4) capacity limits principle: when being activated unit starting, required minimum load is less than and starts exerting oneself of unit, and recovers jumbo unit;

5) important load priority principle;

6) minimal time principle: select the unit being in hot stand-by duty;

7) loop principle is avoided: in the path being activated unit, there is not loop from starting unit.

III, filter out the electrical path verified by feasibility: the Interventions Requested of described feasibility verification comprise: the verification of generator self-excitation, low-frequency oscillation verification, power-frequency overvoltage verification, switching overvoltage School Affairs electric voltage frequency stability verify;

IV, determine from black starting-up power supply to the path being activated power supply combination property optimum, be optimized database restore path: all black starting-up restoration paths verified by feasibility are assessed and sorted, selects from black starting-up power supply to the path being activated power supply combination property optimum; Evaluation index comprises to be selected voltage transitions number of times, path, start-up time, is activated unit capacity, technology verifies good and bad degree and is activated the priority level of power supply, and it is obtain suing for peace after generator self-excitation, power-frequency overvoltage multiple, switching overvoltage multiple, variation, frequency shift (FS) normalization that technology wherein verifies good and bad index.The index considered during path evaluation and technology verify technology contents that good and bad degree comprises respectively as shown in Table 1 and Table 2:

The index considered during table 1 path evaluation

Table 2 technology verifies the technology contents that good and bad degree comprises

Because the initial condition generated needed for black starting-up path needs to arrange in several interfaces, user may omit some steps in use thus cannot obtain legitimate result.Grasp black starting-up path generating method for convenience of user of service, introduce pilot pattern.Black starting-up coordinates measurement guide is actually arranging black starting-up power supply, arrange and be activated power supply, arrange route searching parameter integration to procedure aggregate together.By all displaying in certain sequence to setting of needing, before the interface of calling route searching operation program (black starting-up coordinates measurement guide confirms that interface as shown in Figure 8), all necessary data are all ready.In the figure, click button and will call route searching program, to complete the search to specifying startup power supply and appointment to be activated path between power supply.The power supply that is activated in black starting-up coordinates measurement guide selects interface as shown in Figure 9.

Six, system partitioning:

According to current scheduling mechanism formulate the massive blackout accident that faces time power system restoration scheme, what substantially take is that power supply interrupted district is divided into multiple subregion by Utilities Electric Co.'s ownership, in all subregion, all arrange that black starting-up power supply is to ensure the self-startup ability of subregion, main unit and load in all subregion parallel recovery region, suitable simultaneous interconnecting on opportunity is selected, to realize the interconnected of whole electrical network under the coordination that all subregion is dispatched higher level.The shortcoming of this division methods is that the combination of the load bus in region and the black starting-up power supply in region may not be optimum, such as, P node in a-quadrant starts via the black starting-up power supply SA in a-quadrant may need 2 hours, and start via the SB in B region and only need 1.5 hours, and after having a power failure, fast quick-recovery load is significant.Carry out the subregion of system according to the distribution situation of black starting-up power supply, and consider starting characteristic and the system mode of unit, but fail safe in System recover and generating and load balancing are limited and consider deficiency.Based on the recovery subsystem partitioning algorithm of complex network community structural theory, but it is activated power supply with regard to selected before calculating, and black starting-up power supply is become a node to being activated the node merging comprised in path between power supply, has certain subjectivity.Based on the black starting-up partitioning strategies of ordered binary decision diagram, but the method mainly seeks optimal solution by Network Topology Discovery, less to the consideration of other influences factor.

Present invention employs a kind of power system blackstart partition method based on fuzzy cluster analysis, system partitioning is realized by system partitioning module, and described system partitioning is realized by following steps:

(1) raw data matrix of electrical distance between each node of reflection and each black starting-up power supply is set up:

For ensureing carrying out smoothly of black starting-up, when subregion, ensure that each subregion has a black starting-up power supply at least.Each black starting-up power supply in each subregion, through several middle transformer station, starts other power plant or the power supply of recovery to load.Consider reliability and timeliness, can weigh by following index and eachly be activated power plant, important transformer station, the power of electrical link between load bus and black starting-up power supply: the distance 1) and between black starting-up power supply; 2) voltage transitions number of times; 3) through power station number in the middle of.These three indexs are all cost type indexs, and the control objectives of subregion is that these three desired values are the smaller the better.

Electrical distance between defined node i and black starting-up power supply j is:

L ij = &Sigma; k = 1 l &omega; ij ( k ) r ij ( k ) &prime; ①;

Wherein, r ij (k)for weighing a kth desired value of electrical link power, r ij (k)' be numerical value after its standardization, r max, r minbe respectively r ij (k)corresponding to maximum, the minimum value of different i; ω ibe the weights of i-th index; L represents index number, is taken as 3; I=1,2 ..., m, j=1,2 ..., n; Node comprises and is activated power supply, transformer station and load bus;

If with the node of the m in electrical network for object of classification, black starting-up power supply number is n, then the electrical distance between node i and black starting-up power supply j forms individual features index, each element namely in raw data matrix:

x ij=L ij②;

Then set up raw data matrix X=(x ij) m × n; Wherein i=1,2 ..., m, j=1,2 ..., n

(2) in practical problem, different data generally have different dimensions, in calculating process, the king-sized characteristic index of some order of magnitude may play too outstanding effect to classification, and the effect of the very little characteristic index of some order of magnitude may be reduced and even ignores.In order to make different dimensions also can compare, usually need to do suitable conversion to data.According to the requirement of fuzzy matrix, need data compression on interval [0,1].The more standardized method of current employing mainly contains: standard deviation standardization, maximum standardization, extreme difference standardization, average standardization, centralized criterion, logarithmic scale etc.The present invention adopts extreme difference standardized method to carry out standardization to raw data matrix, and its expression formula is:

y ik = x ik - min 1 &le; i &le; m { x ik } max 1 &le; i &le; m { x ik } - min 1 &le; i &le; m { x ik } , ③;

Wherein: k=1,2 ..., n;

(3) demarcate object to be sorted, set up fuzzy similarity matrix:

Set up fuzzy similarity matrix and be also called demarcation, refer to the statistic r marking and weigh and be classified similarity degree between object ij; If domain X={x 1, x 2..., x m, x i=(x i1, x i2..., x in), then x iwith x jsimilarity degree be r ij=R (x i, x j), i, j=1,2 ..., m; Its method for solving mainly contains: Similar operator (comprising quantity area method, Cosin method, correlation coefficient process, index Similar operator, minimax method, the minimum method of arithmetic average, the minimum method of geometric average), Furthest Neighbor (comprising absolute value counting backward technique, absolute exponent method, direct range method) and method of subjective appraisal etc.

The present invention adopts absolute exponent method to solve r ij, its expression formula is:

r ij = exp ( - c &Sigma; k = 1 n | y ik - y ik | ) ④;

Wherein: c is positive number, its value is 0≤r ij≤ 1; Get empirical value c=1.

(4) apply Transitive Closure Method and cluster carried out to each object, obtain the system partitioning scheme of corresponding different threshold value:

Choose suitable threshold value λ ∈ [0,1], according to as shown in the formula the λ-Level Matrix 5. asking for fuzzy matrix R obtain the partition scheme of corresponding different λ value, be:

r ij ( &lambda; ) = 1 , r ij &GreaterEqual; &lambda; 0 , r ij < &lambda; , ⑤;

For x i, x j∈ X, if then in threshold value λ level by object x iwith object x jbe classified as same class; For different threshold value λ, according to R λclassify, the classification obtained is exactly the equivalence classification in λ level, i.e. the system partitioning scheme of corresponding different threshold value;

(6) carry out merging and the adjustment of system partitioning with reference to power grid"black-start" power distribution and trend check results, obtain final black starting-up partition scheme.Rule below combining in black starting-up subregion process:

(1) control the voltage transitions number of times in black starting-up process, reduce the empty voltage out-of-limit filling circuit and cause;

(2) constrained Path length reduces the capacitive load that circuit is formed, and reduces the probability of generator generation self-excitation;

(3) the plant stand quantity limiting process in black starting-up process reduces recovery operation, reduces the risk of scheme and shortens start-up time.

Seven, black-start scheme (rough draft) generates:

Generally speaking, the final goal of carrying out black starting-up analysis under research state forms complete effective power grid"black-start" analysis report, Such analysis result directly can be filed arrangement and be exported with the form of report by the black-start scheme generation module of system, form preliminary power grid"black-start" analysis report, eliminate user and from multiple destination file, extract data to carry out the worry of confluence analysis.

Eight, application design:

Present invention also offers the application design of black start assistant decision making method.

Basic platform provides the interface of various service, for application and development provides data exchange mechanism, man-machine support, Data support, public service module and system management function, and supporting business customization and adjustment, as shown in figure 11.

Bulk power grid recovers aid decision-making system and develops based on the corresponding interface and technical requirement, mainly comprises database, program and man-machine interface.

Database

Online bulk power grid recovers aid decision-making system and comprises system database (various public equipment list), computation database (parameter list, result of calculation table etc.), private data storehouse (only recovering relevant table to scale grid line).The database of online power system recovery aid decision is the bridge of contact procedure, picture, input/output information, plays a part to deposit initial data, preserve computational process record and computing information, output result of calculation.

The database of power system recovery aid decision is based on intelligent grid supporting system technology support platform, and database mainly comprises following three parts:

1. equipment list: for depositing each device parameter and interconnected relationship, the information that the overwhelming majority needs is contained in the basic platform common block list of intelligent grid supporting system technology support system, but lack the parameter being activated the corresponding subsidiary engine of unit, newly-built auxiliary system table, to comprise relevant parameter.

---bus table (busbarsection)

---generator table (generatingunit)

---transformer table (powertransformer)

---circuit table (aclinesegment)

---load meter (energyconsumer)

---switch (breaker)

---disconnecting link table (disconnector)

---auxiliary system table (auxiliary_motor)

Wherein auxiliary system table is as shown in table 3.

Table 3 auxiliary system table

Sequence number English name Chinese name Data type 1 id Mark long 2 un_id Serve unit id long 3 percent_ld Dynamic load accounting float 4 tj Inertia time constant float 5 xs Stator winding induction reactance float 6 rr Rotor windings resistance float

7 xr Rotor windings leakage reactance float 8 alfa Constant moment of force float 9 ro Mechanical property index float 10 s0 Stable state slippage float 11 t1 Stator open circuit time constant float 12 percent_ld1 Constant-impedance load accounting float

2. scheme table:

---partition scheme table: store black starting-up partition scheme result.Partition scheme table is the expansion of platform device table, " black starting-up subregion " territory of an increase int type on original each equipment list (bus table, generating set, transformer table, circuit table, load meter, circuit breaker table, disconnecting link table) basis.

---route scheme table: the scheme obtained after storing rule-based route searching.Its list structure is as shown in table 4:

Table 4 route scheme table

Sequence number English name Chinese name Data type 1 id Mark long 2 area_no Regional number int 3 route_no Path number int 4 position Element position in the paths int 5 type_dev Component type int 6 id_dev Element i d long 7 name_dev Element title string

3. calculating parameter table:

---calculate controling parameters table: for depositing the weight for each index when route searching restriction, evaluates calculation in black starting-up Power Selection process, the parameters such as result of calculation store path.

Table 5 calculates controling parameters table

Sequence number English name Chinese name Data type 1 id Mark long 2 mode Pattern int 3 path_case Scheme storing path string 4 path_emtp Transient state result path string 5 path_steady Steady result path string 6 limit_transfer_v Voltage transitions number of times limits int 7 limit_length Path limits float 8 limit_st Limit by way of plant stand number int 9 limit_starttime Start-up time limits float 10 limit_vipload Important load limits float 11 weight_transfer_v Voltage transitions number of times weight float 12 weight_length Path weight float 13 weight_tech Technology verification weight float 14 weight_time Start-up time weight float 15 weight_unmva Be activated unit capacity weight float 16 weight_highkv Highest voltage level weight float

---operation demonstration table: for depositing the equipment being about to carry out operating, verifies after reading for program.

Table 6 operation demonstration table

Sequence number English name Chinese name Data type 1 id Mark long 2 dev_id Equipment id long 3 seq Operating sequence int 4 dev_name Device name string

4. evaluation form

---path evaluation result table: for depositing from appointment black starting-up power supply to being activated each path evaluation ranking power supply.As shown in table 7.

Table 7 path evaluation result table

Sequence number English name Chinese name Data type 1 id Mark long 2 route_no Path number int 3 score Assessment score float 4 rank Rank int

Initial restoration path assessment result table: the relative effectiveness order storing feasible program.

Man-machine interface

Aid decision of rationing the power supply is drawn to calculate the exploitation of picture based on intelligent grid supporting system technology support system, the picture browser and the editing machine that adopt basic platform to provide and man-machine interface realizes man-machine interaction and result is shown.

The present invention also provides a kind of online bulk power grid to recover aid decision-making method, and described method choice different working modes carries out corresponding steps, and described mode of operation comprises real-time auxiliary mode and researchs and analyses pattern.

The flow process of the described method 1. under real-time mode as shown in figure 12, comprises the steps:

<1> confirms to enter real-time back work flow process: back work flow process is generally triggered by event in real time, after large-scale blackout occurs, system monitoring module judges that current system conditions is as the state of having a power failure on a large scale, then send state event of having a power failure on a large scale, bulk power grid recovers aid decision-making system preparation and enters real-time back work flow process, after user confirms, formally enter real-time back work flow process, cause the situation by mistake entering real-time back work flow process to avoid event error signal.

<2> reads the system normal section nearest apart from the power failure incident generation moment as the target section recovered, this section is by other CMOS macro cell of intelligent grid supporting system technology, and is unifiedly stored in section storehouse.

<3> reads and is activated unit;

<4> reading system state, judges power failure range and equipment live situation;

<5> calculates current trend;

Operation demonstration table in <6> reading database, judges whether the equipment put into operation;

<7> judges that whether the equipment that puts into operation be and the transformer being activated unit and being connected: if, carry out step <8>, otherwise carry out step <9>;

<8> electromechanical transient verifies, and the group identity that is activated reached is set to 1;

<9> carries out feasibility verification to being activated unit;

<10> judges whether to be verified by feasibility: if so, carry out step <11>, otherwise carries out step <14>;

<11> provides the feasible prompting in this path (this path refers to the equipment ordered set of process in the middle of when being connected to from black starting-up power supply the equipment verified operation demonstration table);

The unit deletion that puts into operation that <12> will verify in operation demonstration table;

<13> continues to judge whether the operation demonstration table after step <12> has reached and is activated unit: if, then carry out step <20>, otherwise, return step <4>;

<14> for starting point, carries out route searching to be activated unit for terminal with (this equipment refers to the current equipment verified in operation demonstration table) the charged bus be connected with the equipment that will operate;

<15> carries out feasibility verification in the path to the requirement meeting step <14>;

<16> path evaluation also sorts;

<17> judges whether to there is the path verified by feasibility: if so, then carry out step <19>, otherwise carry out step <18>;

<18> provides the path without being verified by feasibility, and provides the assessment rank order of preset path;

<19> is given by the path of feasibility verification, and provides the highest path of appreciable levels;

If <20> has returned to and has been activated power supply, and exit real-time auxiliary mode, otherwise, repeat step <10>-<19GreatT.G reaT.GT.

2. said method comprising the steps of under researching and analysing pattern:

A, enter the pattern of researching and analysing.Pattern of researching and analysing is specified by user and is entered, as the step 1 in Figure 13.

B, research section obtain.Obtain basic research section from section storehouse, and after modifying based on it, generate the section configuration that user wants research.User can preserve its amended section in order to using later.As step 2,3,4,5,6,7 in Figure 13.

C, black starting-up subregion calculate.Carry out system ambiguous cluster subregion according to the research section of user's setting to calculate, provide division result for reference during formulation partition scheme.As step 8 in Figure 13 and 15.

D, route searching.User of service's designated analysis region, and specify the black starting-up power supply in this region and after being activated power supply and after some calculate controling parameters, calculates by path-generating module the path that meets search condition and shows.As step 9,10,11,12,13,14 in Figure 13.

E, path evaluation.All kinds of verification is carried out to all paths obtained after route searching, verification structure is participated in path evaluation as index, obtain describing the good and bad scoring of degree in each path and the rank in each path.As step 23,24,25 in Figure 13.

F, labor and waveform are shown.After route searching completes and obtains all paths, the bus wanting path and the concern studied can be specified, call Load flow calculation, EM transient calculation and electromechanical transient respectively to calculate, adopt waveform display module just the voltage waveform paying close attention to bus correlation computations can be displayed.As step 16,17,18,19,20,21,22 in Figure 13.

G, in generation pass and after completing all verifications of a paths, specify the black-start scheme generating and adopt this path, system will gather about the result of this path when carrying out all kinds of verification, generates black-start scheme draft.As the step 26 in Figure 13,27.

Online bulk power grid provided by the invention recovers aid decision-making system and method can be formulate the suggestion that Large-Scale Interconnected electric power system (provincial and above scale electrical network) black-start scheme provide the aspect such as system partitioning, optimal path, scheme rough draft can be generated fast, can dispatcher be assisted to carry out electric voltage frequency stability contorting in the recovery process after causing the entirely black accident of electrical network to occur, and the recovery scheme that other can be provided feasible for dispatcher when recovering prediction scheme and being unavailable be advised.Researching and analysing under pattern, can according to the network configuration of Large-Scale Interconnected electric power system and the system initial state envisioned, the required recovery partition scheme recovering region is obtained by fuzzy cluster analysis, and can this mechanism be planned by black starting-up power supply, until each subregion black starting-up power supply be activated after power supply determines, carry out the Network topology based on condition, technology verification is carried out after being met the path of condition, using technology check results as an index, other indexs considered when coupling system recovers carry out overall merit with entropy power fuzzy evaluation method, be restored and be activated the optimal path of power supply.Under assisting reforestation practices in real time, SCADA(SupervisoryControlAndDataAcquisition in Real-time Obtaining on-line system and data acquisition and Monitor and Control) data, EMTP(Electro-MagneticTransientProgram electro-magnetic transient analysis program in coupling system) module and flexible Load flow calculation module, normal section up-to-date before occurring using accident, as load restoration target, controls to draw optimal load restoration scheme in conjunction with electric voltage frequency; When equipment involved in black starting-up prediction scheme causes it unavailable due to objective factors such as maintenance, fault or natural calamities, adoptable black starting-up optimal path under being given in current electric grid situation, assist dispatcher's rapid adjustment recovery scheme, to realize the recovery of whole electric power system.System is based on SG-OSS(SmartGridOperatingandSupportingSystem and intelligent grid supporting system technology) exploitation, meet its every related specifications requirement.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.

Claims (4)

1. online bulk power grid recovers an aid decision-making system, it is characterized in that, described system comprises real-time auxiliary mode and researchs and analyses pattern two kinds of mode of operations, and described system comprises:
Section Operations Analyst module: read for section and section operation, comprises recovery target section read module, section read module, Research foundation section read module, research cross section regulation module and section recovers module in real time;
Calculate configuration module: to arrange for calculating parameter, black starting-up Power Selection and be activated Power Selection, comprise parameter setting module, black starting-up Power Selection module and be activated Power Selection module;
Computing function module: for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment, comprise system partitioning module, Load flow calculation module, EM transient calculation module, electromechanical transient computing module and route searching and evaluation module;
Management of computing module: the display generating scheme for system partitioning scheme, voltage waveform, available path rank and black starting-up, comprises waveform display module;
Under real-time auxiliary mode, described computing function module is used for Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment; Researching and analysing under pattern, described computing function module is used for system partitioning, Load flow calculation, EM transient calculation, electromechanical transient calculating and route searching and assessment;
Load flow calculation is realized by Load flow calculation module, comprises the direction of energy distribution situation in designated model;
EM transient calculation is realized by EM transient calculation module, adopts EMTP kit to carry out electromagnetic transient analysis and obtains operating voltage check results;
Electromechanical transient calculates and is realized by electromechanical transient computing module;
Described system partitioning is the power system blackstart subregion based on fuzzy cluster analysis, is realized by system partitioning module, and described system partitioning is realized by following steps:
(1) raw data matrix of electrical distance between each node of reflection and each black starting-up power supply is set up:
Electrical distance between defined node i and black starting-up power supply j is:
L i j = &Sigma; k = 1 l &omega; i j ( k ) r i j ( k ) &prime; ①;
Wherein, r ij (k)for weighing a kth desired value of electrical link power, r ij (k)' be numerical value after its standardization, r max, r minbe respectively r ij (k)corresponding to maximum, the minimum value of different i; ω ibe the weights of i-th index; L represents index number, is taken as 3; I=1,2 ..., m, j=1,2 ..., n; Node comprises and is activated power supply, transformer station and load bus;
If with the node of the m in electrical network for object of classification, black starting-up power supply number is n, then the electrical distance between node i and black starting-up power supply j forms individual features index, each element namely in raw data matrix:
x ij=L ij②;
Then set up raw data matrix X=(x ij) m × n; Wherein i=1,2 ..., m, j=1,2 ..., n
(2) standardization is carried out to element each in described raw data matrix: adopt extreme difference standardized method to carry out standardization to raw data matrix, its expression formula is:
y i k = x i k - m i n 1 &le; i &le; m { x i k } max 1 &le; i &le; m { x i k } - m i n 1 &le; i &le; m { x i k } , ③;
Wherein: k=1,2 ..., n;
(3) demarcate object to be sorted, set up fuzzy similarity matrix:
Set up fuzzy similarity matrix and be also called demarcation, refer to the statistic r marking and weigh and be classified similarity degree between object ij; If domain X={x 1, x 2..., x m, x i=(x i1, x i2..., x in), then x iwith x jsimilarity degree be r ij=R (x i, x j), i, j=1,2 ..., m;
Absolute exponent method is adopted to solve r ij, its expression formula is:
r i j = exp ( - c &Sigma; k = 1 n | y i k - y j k | ) ④;
Wherein: c is positive number, its value is 0≤r ij≤ 1;
(4) apply Transitive Closure Method and cluster carried out to each object, obtain the system partitioning scheme of corresponding different threshold value:
Choose suitable threshold value λ ∈ [0,1], according to as shown in the formula the λ-Level Matrix 5. asking for fuzzy matrix R obtain the partition scheme of corresponding different λ value, be:
r i j ( &lambda; ) = { 1 , r i j &GreaterEqual; &lambda; 0 , r i j < &lambda; , ⑤;
For x i, x j∈ X, if then in threshold value λ level by object x iwith object x jbe classified as same class; For different threshold value λ, according to R λclassify, the classification obtained is exactly the equivalence classification in λ level, i.e. the system partitioning scheme of corresponding different threshold value;
(5) carry out merging and the adjustment of system partitioning with reference to power grid"black-start" power distribution and trend check results, obtain final black starting-up partition scheme;
Rule below combining in black starting-up subregion process:
<1> controls the voltage transitions number of times in black starting-up process, reduces the empty voltage out-of-limit filling circuit and cause;
<2> constrained Path length reduces the capacitive load that circuit is formed, and reduces the probability of generator generation self-excitation;
The plant stand quantity that <3> limits process in black starting-up process reduces recovery operation, reduces the risk of scheme and shortens start-up time.
2. online bulk power grid as claimed in claim 1 recovers aid decision-making system, it is characterized in that, under real-time auxiliary mode, described section operation recovers target section and real-time section for reading; Researching and analysing under pattern, described section reads for reading Research foundation section and recovering target section and carry out research cross section regulation and section recovery;
Read and recover target section by recovering the realization of target section read module, comprising: read from the section storehouse of system and specify section as the target section recovered, for analytical calculation provides load value and the system running state of each load bus needed for optimization;
Read real-time section to be realized by real-time section read module, comprising: reading system SCADA applies measurement and the state of lower all devices, obtains system cloud gray model present situation;
Read Research foundation section to be realized by Research foundation section read module, comprising: read from the section storehouse of system and specify section as the basic section researched and analysed;
Research cross section regulation realizes by studying cross section regulation module, comprising: arrange at Research foundation section, and obtain the system mode after simulating large-scale blackout generation, i.e. black starting-up problem initial state, this initial state is called research section;
Section recovers to recover module by section and realizes, and comprising: Research foundation section is reverted to the state before last cross section regulation.
3. bulk power grid as claimed in claim 1 online recovers aid decision-making system, it is characterized in that, at real-time auxiliary mode with under researching and analysing pattern, described calculating configuration module is all arranged for calculating parameter, black starting-up Power Selection and be activated Power Selection;
Calculating parameter arranges and is realized by parameter setting module, and described parameter comprises for describing route searching rule and the calculating parameter for path evaluation sequence, and computation schema is selected, the controling parameters of result storing path;
Black starting-up Power Selection is chosen module by black starting-up and is realized, the black starting-up power supply adopted when described black starting-up Power Selection is and specifies for researching and analysing;
Be activated Power Selection to realize by being activated Power Selection module, described in be activated Power Selection be used to specify research and analyse or auxiliary in real time time be activated power supply really.
4. online bulk power grid as claimed in claim 1 recovers aid decision-making system, it is characterized in that,
Route searching is realized by route searching and evaluation module with assessment, and route searching selects from black starting-up power supply to the path being activated power supply combination property optimum;
Described route searching and evaluation module comprise restoration path generation module and black starting-up coordinates measurement to guide module;
Generate black starting-up restoration path to comprise the steps:
I, determine to be activated power supply: described in be activated power acquisition fired power generating unit;
II, adopt rule-based initial path searching algorithm, obtain from black starting-up power supply to the feasible electrical path being activated power supply; Described initial path searching algorithm follows following rule:
1) voltage transitions number of times restriction principle: control the voltage transitions number of times in black starting-up process;
2) path restriction principle: restriction black starting-up restoration path length;
3) plant stand restriction principle;
4) capacity limits principle: when being activated unit starting, required minimum load is less than and starts exerting oneself of unit, and recovers jumbo unit;
5) important load priority principle;
6) minimal time principle: select the unit being in hot stand-by duty;
7) loop principle is avoided: in the path being activated unit, there is not loop from starting unit;
III, filter out the electrical path verified by feasibility: the Interventions Requested of described feasibility verification comprise: the verification of generator self-excitation, low-frequency oscillation verification, power-frequency overvoltage verification, switching overvoltage School Affairs electric voltage frequency stability verify;
IV, determine from black starting-up power supply to the path being activated power supply combination property optimum, be optimized database restore path: all black starting-up restoration paths verified by feasibility are assessed and sorted, selects from black starting-up power supply to the path being activated power supply combination property optimum; Evaluation index comprises to be selected voltage transitions number of times, path, start-up time, is activated unit capacity, technology verifies good and bad degree and is activated the priority level of power supply, and it is obtain suing for peace after generator self-excitation, power-frequency overvoltage multiple, switching overvoltage multiple, variation, frequency shift (FS) normalization that technology wherein verifies good and bad index.
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