CN104835077A - Static safety analysis system with dispatcher accident prediction supporting function - Google Patents
Static safety analysis system with dispatcher accident prediction supporting function Download PDFInfo
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Abstract
The invention discloses a static safety analysis system with a dispatcher accident prediction supporting function and belongs to the field of control. The static safety analysis system is characterized by in the scanning of preconceived faults of an online static safety analysis module in the static safety analysis system, adding an analyzing function of the operation of the automatic switching device of the standby power supply, achieving N-1 scanning after the operation of the automatic switching device of the standby power supply, computing the power flow after the operation of the automatic switching device of standby power supply in order to accurately reflect a power flow change after the operation of the automatic switching device of the standby power supply, and generating an accident preconceived text based on an analyzed result. The static safety analysis system may simulate and analyze power grid power flow distribution states in different operating modes, enables the dispatcher to be capable of online researching the safety stability of an regional power grid in real time, improves the safety stability of real-time online power grid research, generates available accident preconceived texts for the dispatcher, improves a capability of treating emergency power grid accidents for the dispatcher, and achieves dispatcher accident prediction supporting function.
Description
Technical field
The invention belongs to control field, particularly relate to a kind of static security analysis system for electric power dispatching system.
Background technology
Along with the development of modern electric technology, the scale of electric power networks is increasing, and complexity is also more and more higher.
Increasing with the impact on power grid security of landing pit disaster, geologic hazard, environmental hazard and outside destroy, propose requirements at the higher level to power network safety operation, existing grid monitoring techniques means still can not adapt to power network development demand completely.In light of this situation, in the urgent need to researching and developing the senior application of intellectuality that a series of practicality and operability have both on intelligent scheduling technology back-up system, for power system monitor person's fast processing fault, restoring electricity and formulating Plant maintenance plan provides and provides powerful support for, and improve accuracy and the rapidity of accident abnormality process further, ensure power network safety operation.
The ground tune dispatching system that electric company of Guo Wangmou city uses at present is the ground key degree service system of certain scientific and technological limited company.This platform adopts the CIM/CIS data model definitions following IEC 61970 standard, and adopts CORBA technology, devises the system integration framework following IEC 61970 component reference model, and achieves IEC61970 CIS interface.This system adopts server/client (C/S) structure, supports multi-context, can across UNIX and PC hardware platform, and has the cross-platform ability that different unix server mixes arbitrarily.
Although this system provides a series of as the senior application function such as online static security analysis, dispatcher trainning emulate system (DTS), be intended to facilitate yardman to analyze and electric network swim situation under simulating different running method, improve yardman in the face of power grid accident time fault analysis and disposing capacity, but in actual applications, still there are problems.Such as, when transforming plant main transformer fault occurs, static security analysis module and DTS cannot the prepared auto restart action situations of correct simulating reality electrical network, and the corresponding power flow changing of reasonable computation, also cannot generate rationally available prediction failure text simultaneously.In addition, the maintenance function not opening within the system of prepared auto restart model, yardman cannot carry out independence maintenance to the prepared auto restart method of operation.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of static security analysis system with yardman's prediction failure support function, it carries out arranging the prepared auto restart method of operation easily in N-1 scanning at dispatcher trainning emulate system and online static security analysis, convenient analysis and the electric network swim distribution situation under simulating different running method, improve the security and stability of real-time online research electrical network, and be yardman's generative science, available prediction failure text; For area power grid monitor staff provides the senior application function of scheduling back-up system of more scientific practicality, promote regulation and control personnel to the judgement processing power of accident, improve accuracy and the rapidity of accident abnormality process, further lifting electrical network intensive management level, the safe and stable operation for electrical network provides strong technical support.
Technical scheme of the present invention is: provide a kind of and have the static security analysis system that yardman's prediction failure supports function, comprise online static security analysis module and dispatcher trainning emulate system, it is characterized in that:
In dispatcher trainning emulate system and online static security analysis module, a prepared auto restart model is set, prepared auto restart automatic safety device action simulation function is provided;
Wherein, in the online static security analysis module of described static security analysis system scans forecast failure, increase prepared auto restart motion analysis function, realize the N-1 scanning after prepared auto restart action, trend after prepared auto restart action is calculated, accurately to reflect the power flow changing after prepared auto restart action, and generate prediction failure text based on analysis result;
When described static security analysis system uses online static security analysis to carry out N-1 scanning, yardman independently can arrange the method for operation of backup auto-activating device, so that the electric network swim distribution situation under Simulation and analysis different running method, adjust yardman the security and stability of real-time online district's electrical network ground-to-ground to study with making, improve the security and stability of real-time online research electrical network, and generate available prediction failure text, to improve the emergency disposal ability of yardman for power grid accident for yardman;
Wherein, described static security analysis system, achieves the application of prepared auto restart automatic safety device action simulation function under static security analysis and dispatcher trainning emulate system environment; The opening of prepared auto restart model maintenance function described in it, enable yardman's independence maintenance prepared auto restart model, the method of operation of backup auto-activating device is freely set, can closer to electrical network truth, to facilitate the electric network swim distribution situation under Simulation and analysis different running method, to analyze the distribution of network trend exactly; It adopts prepared auto restart function to embed Load flow calculation, the calculating of load transfer plan situation is not only considered to the actual act situation of backup auto-activating device, the load transfer situation of system external model is also included in simultaneously and consider, improve the accuracy of original Load flow calculation, make result of calculation more can reflect the trend distribution situation of true electrical network, practicality and reference value are had more for yardman; Achieve the power supply continuity analysis of important power consumers; Achieve yardman's prediction failure and support function.。
Concrete, the described action logic hauled oneself willingly into automatic safety device action simulation function and comprise single backup auto-activating device, described in it, the action logic of single backup auto-activating device is as follows:
First, judge primary power whether dead electricity, if dead electricity, then enter next step and judge, otherwise terminate;
Secondly, judge that whether standby power supply is charged, if charged, enter next step and judge, if not charged, then the equal actual effect of all power supplys, prepared auto restart action is meaningless, terminates to judge;
3rd, judge whether the current method of operation meets the action request of prepared auto restart, this method of operation needs to complete setting in prepared auto restart model maintenance function.If met, then prepared auto restart meets operation condition, carries out action, otherwise judges to terminate.
Concrete, described static security analysis system calculates the trend after prepared auto restart action, carries out according to the following step:
First, on the basis of ground state trend, cut-offfing equipment and starting network topology in stoppage in transit electric system, in topological process, judges have which backup auto-activating device to meet operation condition, these devices is screened;
After screening terminates, in all qualified backup auto-activating devices, select actuation time the shortest one or a collection of device carry out switching action, after these action backup auto-activating devices of locking;
One take turns prepared auto restart action after, restart network topology, check and cut-off equipment in network, and detect whether there is the backup auto-activating device meeting operation condition, if there is the backup auto-activating device meeting operation condition, then repeat the next item up action, until there is no backup auto-activating device load operation condition;
Finally, carry out Load flow calculation, and Output rusults.
Further, described static security analysis system, in static security analysis module, before carrying out safety analysis calculating, has three kinds of initial modes available:
One is get real-time mode, i.e. the real time operation mode that provides of state estimation;
Two is get trend mode, is namely adjusted the mode of trend by yardman;
Three is get the history run mode of in the past preserving, getting under the history run mode of in the past preserving, static security analysis can transfer the data section of systematic conservation by from date, Close Date and current application, and is read in static security analysis research mode corresponding to the machine by relevant historical service data section.
Further, described static security analysis module is when carrying out Load flow calculation, cut-offfing after analysis terminates to each, except checking the out-of-limit situation of the individual equipments such as line current, transformer capacity, generator output and busbar voltage, also monitor that the stable cross section be made up of circuit and transformer is gained merit.
Further, the static security analysis module of described static security analysis system is in forecast failure scanning, add prepared auto restart motion analysis function, realize the N-1 scanning after prepared auto restart action, and generate prediction failure text based on analysis result, to facilitate yardman to carry out prediction failure work, and obtain more accurately available calculating data;
Wherein, described prediction failure work comprises following 4 ingredients: ruuning situation, accident conditions analysis before accident, stand interior accident treatment and influenced plant stand accident treatment;
1) for " before accident ruuning situation ", prediction failure work will check the current method of operation of all main transformers of particular substation, and exports accordingly result;
2) for " in standing accident treatment " and " influenced plant stand accident treatment " part, prediction failure work is according to the regulation of " city's regional power grid scheduling working specification " and " the strong power transmission supplementary provisions of utility grid ", by yardman according to current electric grid situation and data message, corresponding accident is processed;
3) for " accident conditions analysis ", prediction failure work comprises following content: nature of occurence, main transformer load condition and failure message gather;
Wherein, described nature of occurence generates automatically according to the fault arranged artificial in dispatcher trainning emulate system, and open yardman manual editing function;
Described main transformer load condition provides the associated station main transformer load information by accident impact in local power supplying companies bureaus' compass of competency; The summer peak of the prediction then carry calculation that before accident wherein, system loading provides by fortune side; Described prediction failure application for master data model with the trend section imported, calculates the change of the electric network swim after all backup auto-activating device actions, and exports the load factor situation of all relevant transformer stations;
Failure message described in it gathers in table form, gathers the relevant important information after fault generation; Described relevant important information comprises the situation of autotomying, main transformer load, overload circuit, affects plant stand and responsible consumer.
Further, for described " situation of autotomying ", described static security analysis system, export fault occur after everything from cutting apparatus relevant information;
For described " main transformer load ", described static security analysis system, exports all main transformer load factor situations of accident generation plant stand to text;
For described " overload circuit ", described static security analysis system, reads the trend section imported, and calculates the power flow changing situation of electrical network, is exported by the line name of load factor more than 80%;
For described " affecting plant stand ", in the process that electric network swim calculates, described static security analysis system, by traversal accident generation plant stand the dead electricity situation of relevant subordinate station, and according to the charged situation of topological bus and action record, distinguishing this subordinate station is instantaneous dead electricity or permanent dead electricity, result is exported to impact station and full cut-off station two parts;
For described " responsible consumer ", described static security analysis system, according to the situation of full cut-off circuit, exports all responsible consumer information that it is relevant; Described static security analysis system is by creating " responsible consumer information table " function, by relevant all responsible consumer information feed back to yardman, with the relevant responsible consumer information facilitating yardman can safeguard administrative electrical network, and check the coverage of dead line when prediction failure.
Further, described prepared auto restart model adopts following synchronous method between multi-platform:
A, on the workstation of dispatcher trainning emulate system, realize maintenance to backup auto-activating device by prepared auto restart maintenance interface;
After the prepared auto restart model of B, dispatcher trainning emulate system changes, automatically current prepared auto restart model can be imported in XML file, and be sent in the standby machine of static security analysis;
C, in static security analysis module, watchdog routine is set and monitors derivation time of XML file, if the derivation time in XML file that finds is newer than the model time of "current" model, then automatic XML file to be imported in the model of static security analysis.。
Static security analysis system described in it, can the electrical network imagination fault relevant information be concerned about of output scheduling person fast, on apparatus of load rate, equipment power failure state and the counting statistics affecting the information such as responsible consumer, alleviate the work load of yardman to a great extent, improve work efficiency.
Compared with the prior art, advantage of the present invention is:
1., by arranging prepared auto restart model, provide prepared auto restart automatic safety device action simulation function, the technical program achieves prepared auto restart simulation application under static security analysis and dispatcher trainning emulate system environment; Open model maintenance function; The power supply continuity analysis of important power consumers can be realized; Achieve yardman's prediction failure and support function;
2. by providing prepared auto restart automatic safety device action simulation function, yardman can independence maintenance prepared auto restart model, the method of operation of backup auto-activating device is freely set, to facilitate the electric network swim distribution situation under Simulation and analysis different running method, yardman can be studied the safety and stability situation of area power grid in real time, online, and improve its emergency disposal ability for power grid accident;
3. in prepared auto restart function, embed Load flow calculation, the calculating of load transfer plan situation is not only considered to the actual act situation of backup auto-activating device, the load transfer situation of system external model is also included in simultaneously and consider, improve the accuracy of original Load flow calculation, make result of calculation more can reflect the trend distribution situation of true electrical network, practicality and reference value are had more for yardman.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the single prepared auto restart action logic of the present invention;
Fig. 2 is the Load flow calculation process flow diagram that the present invention considers prepared auto restart action;
Fig. 3 is static security analysis original state value mode schematic diagram of the present invention;
Fig. 4 is a simulation cycle of dispatcher trainning emulate system of the present invention;
The synchronous schematic flow sheet that Fig. 5 is prepared auto restart model of the present invention between multi-platform.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
In Fig. 1, in order to the action of simulation backup auto-activating device correct in static security analysis, need to formulate correct prepared auto restart action logic, in technical solution of the present invention, the action logic of single backup auto-activating device is as follows:
First, judge primary power whether dead electricity, if dead electricity, then enter next step and judge, otherwise terminate;
Secondly, judge that whether standby power supply is charged, if charged, enter next step and judge, if not charged, then the equal actual effect of all power supplys, prepared auto restart action is meaningless, terminates to judge;
3rd, judge whether the current method of operation meets the action request of prepared auto restart, this method of operation needs to complete setting in prepared auto restart model maintenance function.If met, then prepared auto restart meets operation condition, carries out action, otherwise judges to terminate.
In Fig. 2, after embedding backup auto-activating device, the Load flow calculation of static security analysis will consider the action situation of prepared auto restart, and principle is as follows.
First, static security analysis is on the basis of ground state trend, and cut-offfing equipment and starting network topology in stoppage in transit electric system, in topological process, judges have which backup auto-activating device to meet operation condition, these devices are screened.
After screening terminates, in all qualified backup auto-activating devices, select actuation time the shortest one or a collection of device carry out switching action, after these action backup auto-activating devices of locking.
One take turns prepared auto restart action after, static security analysis software restarts network topology, checks to cut-off equipment in network, and detect whether there is the backup auto-activating device meeting operation condition, if there is related device, then repeat the next item up action, until there is no backup auto-activating device load operation condition.
Finally, static security analysis carries out Load flow calculation, and Output rusults.
Static security analysis original state value mode of the present invention is given in Fig. 3.
The technical program is to the Load flow calculation after prepared auto restart action and export corresponding accident prediction text function, all realizes in static security analysis module.
The backup auto-activating device of the technical program and static security analysis as closely related in lower part.
1) initial mode prepares
Safety analysis is calculated, always carries out in some initial methods of operation.There are three kinds of initial modes available: one is get real-time mode, i.e. the real time operation mode that provides of state estimation; Two is get trend mode, namely by particular form that Dispatcher Power Flow is adjusted; Three is get history data mode (being also called history CASE), namely the history data in the past preserved, getting under history CASE mode, static security analysis can pass through the CASE section that from date, Close Date and current application (general selection mode estimates PAS_RTNET and Dispatcher Power Flow PAS_DPFLOW) transfer systematic conservation, and is read by relevant historical CASE section in static security analysis research mode corresponding to the machine.
2) operational factor is safeguarded
● Load flow calculation parameter
Static security analysis be carry out Load flow calculation at all, Load flow calculation parameter picture can arrange the operational factors such as algorithm, convergence criterion, imbalance power allocation scheme.
Equilibrator is the voltage phase angle reference point in maximum electrical island.Imbalance power allocation scheme can be selected in following four kinds of modes: equilibrator absorbs, and multimachine capacity distributes, and multimachine coefficient distributes and multimachine mean allocation.When selecting equilibrator to absorb, the imbalance power of electrical network all will be absorbed by equilibrator (comprising generating, load and network loss).When adopting other three kinds of modes, the imbalance power of electrical network will be responsible for balance by multiple stage generator, as there being which those generator to participate in power adjustments on earth, then be determined by " participating in meritorious adjustment " territory of generator table.Imbalance power allocation scheme between multiple stage generator comprises capacity, coefficient and average three kinds of modes.During selection capacity, the variable capacity according to generator is distributed, according to the artificial coefficient pro-rata arranged during choosing coefficient, select mean time then mean allocation imbalance power.In the assignment procedure, exerting oneself within the scope of maximum output and minimum load of generator is guaranteed.
Generator parameter is set, comprise node type (balance node, PQ node, PV node etc.), can setup control set end voltage or the target voltage values of high side bus voltage and control for PV node, can Set scale coefficient for participating in the meritorious unit regulated by prescribed coefficient.
● self-defined supervision power section
This static security analysis, cut-offfing after analysis terminates to each, except checking the out-of-limit situation of the individual equipments such as line current, transformer capacity, generator output and busbar voltage, also monitors that the stable cross section be made up of circuit and transformer is gained merit.Generally important stable cross section is arranged by SCADA is unified, directly uses during safety analysis.Except these stable cross sections, when carrying out safety analysis, can also some supervision sections of Additional definitions.
● equipment Threshold Crossing Alert is arranged
This static security analysis provides equipment Threshold Crossing Alert function, real-time mode safety analysis is in periodic duty process, if certain equipment is all out-of-limit in continuous break calculation several times, by arranging, the out-of-limit situation of these equipment can be signed in alarm window, for inquiring about later.The need of alarm when the five kinds of dissimilar equipment such as " line current alarm ", " transformer efficiency alarm ", " generator output alarm ", " busbar voltage alarm " and " stable cross section alarm " that arrange respectively are out-of-limit, equipment out-of-limit login alarm is set again and needs number of times out-of-limit continuously, when the Threshold Crossing Alert of certain type is set to "Yes", and number of times out-of-limit continuously in computation of Period process equals the out-of-limit number of times set, then can by out-of-limit device logs to alarm window.
3) result of calculation analysis
The technical program is after successfully embedding static security analysis by prepared auto restart function, and its result of calculation accurately can reflect the power flow changing after prepared auto restart action, the truth of this result of calculation load power grid accident.
After once complete safety analysis terminates, static security analysis will export " out-of-limit statistical form ", to the out-of-limit status inquiry analysis of equipment and section, can will list each out-of-limit situation of cut-offfing fault, comprise with properties in table:
cut-off type: refer to circuit N-1, transformer N-1, generator N-1, bus N-1 or self-defining fault.
plant stand title: refer to the description of cut-offfing plant stand belonging to equipment when N-1 cut-offs, during self-defined fault, this is empty.
device name: refer to the description of specifically cut-offfing equipment when N-1 cut-offs, represent the title of fault group during self-defined fault.
cut-off result: be shown as out-of-limit, dead electricity etc.
out-of-limit element: current out-of-limit quantity of cut-offfing is the summation of the out-of-limit quantity of circuit, transformer, generator, bus and section subsequently.
out-of-limit section: the current section cut-off is gained merit out-of-limit quantity.
out-of-limit circuit: the out-of-limit quantity of the current line current cut-off.
out-of-limit transformer: the out-of-limit quantity of current transformer capacity of cut-offfing.
out-of-limit generator: the out-of-limit quantity of the current generator output cut-off.
out-of-limit bus; The out-of-limit quantity of current busbar voltage of cut-offfing.
severity: reflect the current order of severity of cut-offfing rear system.
Cut-off except out-of-limit overview except providing, static security analysis also provides the detailed out-of-limit statistical conditions of each equipment (section), comprise out-of-limit title, out-of-limit number of times, maximum cut-off equipment (under multiple difference cut-offs situation corresponding out-of-limit the most serious cut-off equipment), maximum out-of-limit value (multiple difference cut-off in situation corresponding out-of-limit the most serious time out-of-limit value), maximum out-of-limit rate (multiple difference cut-off in situation corresponding out-of-limit the most serious time out-of-limit rate).
In Fig. 4, give dispatcher trainning emulate system simulation cycle in the technical program, it comprises:
1, start dispatcher's training simulation system and start simulation process;
2, check the verification of database whether success, and carry out initialization by new analogue enlargement parameter;
The simulation process if 3 teachers request timeout, then simulation is in waiting status;
4, the control command of control center is obtained;
5, from incident file, taking out event: the event in incident file can be that teacher realizes defining, also can be that teacher adds at any time in training process;
6, dynamic analog calcutation is carried out: by calculating genset solution to model, determine that the frequency on island and the mechanical output of unit give trend;
7, the data encasement of Load flow calculation;
8, determine frequency relay state, perform the actuating of relay if desired;
9, Load flow calculation: comprehensively resolve system, according to the situation of system state change, determines whether to need rearrangement or factoring table again;
10, according to calculation of tidal current, check the state of voltage relay and electric current relay, and perform where necessary relay trigger action and control tripping or the multiple action of isolating switch;
If there is relay or breaker actuation in 11 the 10th steps, then illustrate that network topology changes, just should return the 7th step, redefine network equation;
12, static simulation completes, and as now busy insertion, then returns the 5th step and get event argument from incident file;
13, after Load flow calculation terminates, the power system simulation amount of simulation and quantity of state are got in the database of Data Collection.
In Figure 5, the technical program adopts file interaction mode to realize synchronous between multi-platform of prepared auto restart model.
The core of the technical program is to realize prepared auto restart function, and realizes the support that prepared auto restart function needs prepared auto restart model.
Prepared auto restart model relates generally to two problems: one is the maintenance function developing prepared auto restart model on which kind of platform, and two is because application will embed multiple platforms of electric system, therefore need to determine multi-platform between the method for synchronization of prepared auto restart model.
1) prepared auto restart model maintenance platform is determined
In practice, the regular event of prepared auto restart may be protected institute's locking by some, also can some protection of locking after prepared auto restart action.In order to this reality of real simulation, application must possess the configuration feature of " protection blocking prepared auto restart " and " prepared auto restart latch-up protection ", and this function needs the support of proterctive equipment model.In order to avoid heavy second protection maintenance, determine the maintenance function constructing prepared auto restart model on DTS workstation.
2) interface of prepared auto restart model maintenance and instrument
The technical program provides two interfaces for yardman's independence maintenance prepared auto restart model, and interface one is the master station of dispatcher trainning emulate system workstation; Interface two is the static security analysis interface of electric power management system workstation one district workstation.
Above-mentioned interface one, two provides maintenance tool " protection model maintenance tool " for yardman, and its ultimate principle is as follows:
The first, backup auto-activating device information is configured based on plant stand, if current plant stand does not exist, first need add plant stand.
The second, after improving power plant and substation's information, can configure further the corresponding backup auto-activating device of each plant stand.
3rd, by maintenance tool, user can be configured following prepared auto restart information, comprising: whether one is actuation time and the running status of prepared auto restart, can input the start-up time of each backup auto-activating device, and select corresponding backup auto-activating device to drop into.Two is the main power supply information of prepared auto restart, adds the main power supply information of relevant device in the tool.Three is standby power supply information, adds the standby power supply of relevant device.Four is " inspection standby power supply " options, makes backup auto-activating device when main power supply dead electricity, checks in advance whether standby power supply has electricity just decision prepared auto restart whether action.Five is mode switch information, arranges the backup auto-activating device method of operation in normal state, method of operation when namely forecast accident does not occur.Six is step switch information, selects the switch motion situation after the action of forecast accident generation prepared auto restart.
3) the multi-platform synchronous method of prepared auto restart model
Project application will embed DTS and the large module of static security analysis two, because DTS and static security analysis belong to safe II district and safe I district respectively, be furnished with fire wall between two large places of safety.If pass through the mutual of database mode implementation model, whether the model all will inquired about before each calculating in storehouse commercial with comparison is consistent with current model, and consuming time longer, efficiency is lower.After considering, the technical program is determined to realize synchronous between multi-platform of prepared auto restart model in file interaction mode.
Above-mentioned standby self model in the synchronous flow process between multi-platform is:
The first, on the workstation of DTS, realize the maintenance to backup auto-activating device by prepared auto restart maintenance interface.
After the prepared auto restart model of the second, DTS changes, automatically current prepared auto restart model can be imported in XML file, and be sent in the standby machine of static security analysis.
3rd, static security analysis is arranged specific program and monitor XML file, if the derivation time in XML file that finds is newer than the model time of "current" model, then automatic XML file to be imported in the model of static security analysis.
" responsible consumer " refers to and occupy critical role in country or the society of an area (city), politics, economic life, to its interruption of power supply may cause personal injury, compared with overall situation pollution, larger political fallout, larger economic loss, social public order heavy clutter with electric unit or electricity consumption place power supply reliability being had to particular/special requirement.According to the power-off consequence of current dissimilar important power consumers, important power consumers is divided into social class and industrial class two class, industrial class is divided into colliery and non-coal mine, hazardous chemical, metallurgy and electronics and manufacturing industry 4 class; Society's class is divided into juridical authorities of party and government and international organization, radio and television, communication, information security, government utility, communications and transportation, health care and crowded place 8 class.
For responsible consumer, except have relevant regulations in power supply configuration and the emergency power sources of self-preparing configuration except, in emergency management, also there is very high requirement.If power grid accident relates to responsible consumer, electric company according to the emergency preplan formulated in advance, should arrange accident rescue troop as early as possible, rushes towards scene of the accident tissue and rushes to repair, and also requires higher to the crash analysis of yardman and processing power.
After grasping power grid accident generation in time to enable yardman, the responsible consumer scope that may involve, the technical program provides the analytic function of responsible consumer power supply continuity, can according to the power failure state of power-supply unit (instantaneous dead electricity or permanent dead electricity), relevant responsible consumer information classification is outputted to prediction failure and assists text, for yardman's reference.
Its concrete principle is as follows:
First, the technical program sets up important load user mapping table under database module, the initial configuration that this table is analyzed as responsible consumer power supply continuity.
Load transfer table mainly comprises with properties:
load name, circuit name, winding name: the power-supply unit be associated with responsible consumer can be selected to power as charge circuit, alternating current circuit or transformer.
responsible consumer quantity: the responsible consumer quantity associated by this power-supply unit.
the columns such as user 1, user 2: responsible consumer title
Secondly, the technical program cut-off according to static security analysis before and after power flow solutions and prepared auto restart action message, judging will the power-supply unit of instantaneous dead electricity or permanent dead electricity.
3rd, the technical program, according to the incidence relation of power-supply unit and responsible consumer in responsible consumer mapping table, exports the relevant responsible consumer information of dead electricity equipment.
Yardman's prediction failure of the technical program supports function:
The technical program is in static security analysis (SA) scans forecast failure, increase prepared auto restart motion analysis function, realize the N-1 scanning after prepared auto restart action, and generate prediction failure text based on analysis result, this function will facilitate yardman to carry out prediction failure work, and obtain more accurately available calculating data.
From reality of work, prediction failure is mainly divided into following 4 ingredients: ruuning situation, accident conditions analysis before accident, stand interior accident treatment and influenced plant stand accident treatment.
1) for " before accident ruuning situation ", apply the current method of operation by checking particular substation all main transformers, and export accordingly result, as " XX stand two full wiring of main transformer run ".
2) for " in standing accident treatment " and " influenced plant stand accident treatment " part, due to these two parts to scheduling back-up system intelligent require too high, consider for security and system own limitations, need according to the regulation such as " city's regional power grid scheduling working specification ", " the strong power transmission supplementary provisions of utility grid ", by yardman according to current electric grid situation and data message, corresponding accident is processed.
3) main study subject of prediction failure application is " accident conditions analysis ", and this part comprises following content.
● nature of occurence
Apply and automatically generate according to the fault arranged artificial under DTS, and open yardman manual editing function.
● main transformer load condition
The technical program provides the associated station main transformer load information by accident impact in electric company's compass of competency.The summer peak of the prediction then carry calculation that before accident, system loading provides by fortune side.
The technical program for master data model with the trend section imported, calculates the change of the electric network swim after all backup auto-activating device actions, and exports the load factor situation of all relevant transformer stations.
● failure message gathers
Prediction failure requires the relevant important information after gathering fault generation, provides relevant information.
For " 1 autotomy situation ", the technical program exports after fault occurs, everything from cutting apparatus relevant information; For " 2 main transformer load ", the technical program exports all main transformer load factor situations of accident generation plant stand to text; For " 3 overload circuit ", the technical program, with reading the trend section imported, calculates the power flow changing situation of electrical network, is exported by the line name of load factor more than 80%; For " 4 affect plant stand ", in the process that electric network swim calculates, the technical program by traversal accident generation plant stand the dead electricity situation of relevant subordinate station, and according to the charged situation of topological bus and action record, distinguishing this subordinate station is instantaneous dead electricity or permanent dead electricity, result is exported to impact station and full cut-off station two parts; For " 5 responsible consumer ", the technical program, by the situation according to full cut-off circuit, exports all responsible consumer information that it is relevant; In order to by this information feed back to yardman, function that the technical program creates especially " responsible consumer information table ", facilitates yardman can safeguard the relevant responsible consumer information of administrative electrical network, and checks the coverage of dead line when prediction failure.
The outer backup auto-activating device motion analysis of system:
1) due to cannot the impact that produces of the outer prepared auto restart action of computing system
For certain area, each electric company has specific electrical network compass of competency, and the electric power dispatching system adjusted cannot obtain electric network model beyond compass of competency and real time data eachly.
Based on above-mentioned present situation, when needs carry out Load flow calculation, there is following problem: subordinate's plant stand of being powered by native system plant stand is not in compass of competency, but this subordinate station has prepared auto restart again, can have an impact to the outlet trend of plant stand of powering in system after its prepared auto restart action.If do not consider the prepared auto restart action of the outer plant stand of this part system, cannot the Load flow calculation accuracy of Guarantee item application.
Concrete example is as follows:
Be provided with A, B, C tri-plant stands (namely usually said transformer station), plant stand C is the outer plant stand of system, and ground is adjusted cannot obtain its electric network model and real time data.Stand A, B of the higher level of plant stand C is plant stand in system, the compass of competency adjusted with belonging to this electric company.Circuit AC is the circuit of plant stand A to plant stand C in system, and circuit BC is the circuit of plant stand B to plant stand C in system.
In practical situations both, if circuit AC dead electricity, then the backup auto-activating device of plant stand C preferentially can carry out action, and in plant stand C, the load of transformer T1 will be transferred on circuit BC, then the load of the outlet AC of plant stand A will be transferred to the outlet BC of plant stand B, and the trend of these two circuits can change.
And under current existing Load flow calculation mode, because plant stand C belongs to outside system, the circuit BC that therefore circuit AC and B at A station stands is load model.If static security analysis equipment cut-offs cause circuit AC dead electricity, the backup auto-activating device action of plant stand C can not be included in result of calculation.Before the circuit AC of plant stand A and the circuit BC of plant stand B, load transfer plan situation can not occur, can not there is corresponding change in the trend of these two circuits.Which results in the difference calculated with actual, need to process this problem.
2) solution of the technical program: the load transfer relation realizing system external model
In order to make the problems referred to above be solved at all, the technical program creates load transfer table especially, for system external model sets up load transfer relation.
The technical program is set up " load transfer table " under database module, can add the load transfer information of system external model and safeguard in the table.
Load transfer table mainly comprises with properties:
whether turn confession: turning for coming into force mark of charge circuit.When this value is "No", turns and do not come into force for configuration; When this value is "Yes", turn for configuration take-effective.
load quantity: during this charge circuit dead electricity, load transfer is to the quantity of target line.
the columns such as load 1, load 2: fill in corresponding load name.Load 1 is the charge circuit that need turn confession.Load 2 and the following target line for turning for load.
It is pointed out that when load 2 does not fill in specific load title, when generation prepared auto restart action load transfer is described, load 1 trend does not turn confession, directly becomes 0.This situation betides, and an inlet wire of the outer plant stand of system is powered by system, and another line route system is powered outward, and when in system during inlet wire dead electricity, load directly goes to the outer plant stand of system, therefore does not adjust within limit of consideration on ground.
When there is multiple target load such as load 2, load 3, the logic of load transfer is: when load 1 dead electricity, and the idle algebraic sum that has of load 1 will all be assigned on all the other online target loads.
The technical program adopts prepared auto restart function to embed Load flow calculation, the calculating of load transfer plan situation is not only considered to the actual act situation of backup auto-activating device, the load transfer situation of system external model is also included in simultaneously and consider, improve the accuracy of original Load flow calculation, make result of calculation more can reflect the trend distribution situation of true electrical network, practicality and reference value are had more for yardman; Achieve the power supply continuity analysis of important power consumers; Achieve yardman's prediction failure and support function.
Technical scheme of the present invention enables yardman's independence maintenance prepared auto restart model, the method of operation of backup auto-activating device is freely set, to facilitate the electric network swim distribution situation under Simulation and analysis different running method, yardman can be studied the safety and stability situation of area power grid in real time, online, and improve its emergency disposal ability for power grid accident.
In technical solution of the present invention, the opening of prepared auto restart model maintenance function, enable research electrical network under static security analysis and yardman's analogue simulation Training Environment closer to electrical network truth, for yardman can science, exactly analysis network trend distribute, improve the analyzing and processing ability of power grid accident, better carry out combat exercise and laid solid foundation.
In technical solution of the present invention, prepared auto restart function is embedded Load flow calculation, the calculating of load transfer plan situation is not only considered to the actual act situation of backup auto-activating device, the load transfer situation of system external model is also included in simultaneously and consider, improve the accuracy of original Load flow calculation, make result of calculation more can reflect the trend distribution situation of true electrical network, practicality and reference value are had more for yardman.
In technical solution of the present invention, described static security analysis system, can the electrical network imagination fault relevant information be concerned about of output scheduling person fast, and these data previously often needed the at substantial time.The appearance of project application, filled up this blank well, it, on apparatus of load rate, equipment power failure state and the counting statistics affecting the information such as responsible consumer, alleviates the work load of yardman to a great extent, improves work efficiency.
The present invention can be widely used in the power system monitor intelligent dispatching system field of local level electric power dispatching system.
Claims (9)
1. there is the static security analysis system that yardman's prediction failure supports function, comprise online static security analysis module and dispatcher trainning emulate system, it is characterized in that:
In dispatcher trainning emulate system and online static security analysis module, a prepared auto restart model is set, prepared auto restart automatic safety device action simulation function is provided;
Wherein, in the online static security analysis module of described static security analysis system scans forecast failure, increase prepared auto restart motion analysis function, realize the N-1 scanning after prepared auto restart action, trend after prepared auto restart action is calculated, accurately to reflect the power flow changing after prepared auto restart action, and generate prediction failure text based on analysis result;
When described static security analysis system uses online static security analysis to carry out N-1 scanning, yardman independently can arrange the method for operation of backup auto-activating device, so that the electric network swim distribution situation under Simulation and analysis different running method, adjust yardman the security and stability of real-time online district's electrical network ground-to-ground to study with making, improve the security and stability of real-time online research electrical network, and generate available prediction failure text, to improve the emergency disposal ability of yardman for power grid accident for yardman;
Wherein, described static security analysis system, achieves the application of prepared auto restart automatic safety device action simulation function under static security analysis and dispatcher trainning emulate system environment; The opening of prepared auto restart model maintenance function described in it, enable yardman's independence maintenance prepared auto restart model, the method of operation of backup auto-activating device is freely set, can closer to electrical network truth, to facilitate the electric network swim distribution situation under Simulation and analysis different running method, to analyze the distribution of network trend exactly; It adopts prepared auto restart function to embed Load flow calculation, the calculating of load transfer plan situation is not only considered to the actual act situation of backup auto-activating device, the load transfer situation of system external model is also included in simultaneously and consider, improve the accuracy of original Load flow calculation, make result of calculation more can reflect the trend distribution situation of true electrical network, practicality and reference value are had more for yardman; Achieve the power supply continuity analysis of important power consumers; Achieve yardman's prediction failure and support function.
2. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that the described action logic hauled oneself willingly into automatic safety device action simulation function and comprise single backup auto-activating device, described in it, the action logic of single backup auto-activating device is as follows:
First, judge primary power whether dead electricity, if dead electricity, then enter next step and judge, otherwise terminate;
Secondly, judge that whether standby power supply is charged, if charged, enter next step and judge, if not charged, then the equal actual effect of all power supplys, prepared auto restart action is meaningless, terminates to judge;
3rd, judge whether the current method of operation meets the action request of prepared auto restart, this method of operation needs to complete setting in prepared auto restart model maintenance function.If met, then prepared auto restart meets operation condition, carries out action, otherwise judges to terminate.
3. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that described static security analysis system calculates the trend after prepared auto restart action, carry out according to the following step:
First, on the basis of ground state trend, cut-offfing equipment and starting network topology in stoppage in transit electric system, in topological process, judges have which backup auto-activating device to meet operation condition, these devices is screened;
After screening terminates, in all qualified backup auto-activating devices, select actuation time the shortest one or a collection of device carry out switching action, after these action backup auto-activating devices of locking;
One take turns prepared auto restart action after, restart network topology, check and cut-off equipment in network, and detect whether there is the backup auto-activating device meeting operation condition, if there is the backup auto-activating device meeting operation condition, then repeat the next item up action, until there is no backup auto-activating device load operation condition;
Finally, carry out Load flow calculation, and Output rusults.
4. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that described static security analysis system, in static security analysis module, before carrying out safety analysis calculating, have three kinds of initial modes available:
One is get real-time mode, i.e. the real time operation mode that provides of state estimation;
Two is get trend mode, is namely adjusted the mode of trend by yardman;
Three is get the history run mode of in the past preserving, getting under the history run mode of in the past preserving, static security analysis can transfer the data section of systematic conservation by from date, Close Date and current application, and is read in static security analysis research mode corresponding to the machine by relevant historical service data section.
5. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that described static security analysis module is when carrying out Load flow calculation, cut-offfing after analysis terminates to each, except checking the out-of-limit situation of the individual equipments such as line current, transformer capacity, generator output and busbar voltage, also monitor that the stable cross section be made up of circuit and transformer is gained merit.
6. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that the static security analysis module of described static security analysis system is in forecast failure scanning, add prepared auto restart motion analysis function, realize the N-1 scanning after prepared auto restart action, and generate prediction failure text based on analysis result, to facilitate yardman to carry out prediction failure work, and obtain more accurately available calculating data;
Wherein, described prediction failure work comprises following 4 ingredients: ruuning situation, accident conditions analysis before accident, stand interior accident treatment and influenced plant stand accident treatment;
1) for " before accident ruuning situation ", prediction failure work will check the current method of operation of all main transformers of particular substation, and exports accordingly result;
2) for " in standing accident treatment " and " influenced plant stand accident treatment " part, prediction failure work is according to the regulation of " city's regional power grid scheduling working specification " and " the strong power transmission supplementary provisions of utility grid ", by yardman according to current electric grid situation and data message, corresponding accident is processed;
3) for " accident conditions analysis ", prediction failure work comprises following content: nature of occurence, main transformer load condition and failure message gather;
Wherein, described nature of occurence generates automatically according to the fault arranged artificial in dispatcher trainning emulate system, and open yardman manual editing function;
Described main transformer load condition provides the associated station main transformer load information by accident impact in local power supplying companies bureaus' compass of competency; The summer peak of the prediction then carry calculation that before accident wherein, system loading provides by fortune side; Described prediction failure application for master data model with the trend section imported, calculates the change of the electric network swim after all backup auto-activating device actions, and exports the load factor situation of all relevant transformer stations;
Failure message described in it gathers in table form, gathers the relevant important information after fault generation; Described relevant important information comprises the situation of autotomying, main transformer load, overload circuit, affects plant stand and responsible consumer.
7. according to according to claim 6, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that for described " situation of autotomying ", described static security analysis system, export fault occur after everything from cutting apparatus relevant information;
For described " main transformer load ", described static security analysis system, exports all main transformer load factor situations of accident generation plant stand to text;
For described " overload circuit ", described static security analysis system, reads the trend section imported, and calculates the power flow changing situation of electrical network, is exported by the line name of load factor more than 80%;
For described " affecting plant stand ", in the process that electric network swim calculates, described static security analysis system, by traversal accident generation plant stand the dead electricity situation of relevant subordinate station, and according to the charged situation of topological bus and action record, distinguishing this subordinate station is instantaneous dead electricity or permanent dead electricity, result is exported to impact station and full cut-off station two parts;
For described " responsible consumer ", described static security analysis system, according to the situation of full cut-off circuit, exports all responsible consumer information that it is relevant; Described static security analysis system is by creating " responsible consumer information table " function, by relevant all responsible consumer information feed back to yardman, with the relevant responsible consumer information facilitating yardman can safeguard administrative electrical network, and check the coverage of dead line when prediction failure.
8. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that described prepared auto restart model adopts following synchronous method between multi-platform:
A, on the workstation of dispatcher trainning emulate system, realize maintenance to backup auto-activating device by prepared auto restart maintenance interface;
After the prepared auto restart model of B, dispatcher trainning emulate system changes, automatically current prepared auto restart model can be imported in XML file, and be sent in the standby machine of static security analysis;
C, in static security analysis module, watchdog routine is set and monitors derivation time of XML file, if the derivation time in XML file that finds is newer than the model time of "current" model, then automatic XML file to be imported in the model of static security analysis.
9. according to according to claim 1, there is the static security analysis system that yardman's prediction failure supports function, it is characterized in that described prediction failure supports function, can the electrical network imagination fault relevant information be concerned about of output scheduling person fast, on apparatus of load rate, equipment power failure state and the counting statistics affecting the information such as responsible consumer, alleviate the work load of yardman to a great extent, improve work efficiency.
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