CN102290811A - Method for evaluating accident prearranged plan and running way - Google Patents
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Abstract
一种对事故预案和运行方式进行评估的方法，首先绘制电网设备的图形和拓扑结构；通过电网拓扑结构和导入的遥测数据，结合电网中的安全自动装置，模拟某一或某几个设备故障后的负荷转移、电流越限、安全自动装置动作情况、用户失电情况；在尽量满足双电源的情况下，自动判断运行方式是否满足电源可靠性和静稳定性方面的要求；还能够针对指定设备智能生成对应不同检修方式的事故预案。本发明能够自动生成对运行方式和设备故障所造成影响的评估，为调度编制运行方式和调度事故处理的决策提供有用的信息。
A method to evaluate the accident plan and operation mode, first draw the graph and topology of the grid equipment; through the grid topology and imported telemetry data, combined with the safety automatic device in the grid, simulate the failure of one or several equipment After load transfer, current limit, safety automatic device action, user power loss; in the case of dual power supply as far as possible, it can automatically judge whether the operation mode meets the requirements of power supply reliability and static stability; it can also target the specified The equipment intelligently generates accident plans corresponding to different maintenance methods. The invention can automatically generate the evaluation of the influence caused by the operation mode and equipment failure, and provide useful information for the decision-making of dispatching and formulating the operation mode and dispatching accident handling.
Description
Technical field
The present invention relates to a kind of method that accident prediction and operational mode are assessed in the fields such as grid equipment.
Background technology
Stop under labour and the special operational mode at the electrical network main equipment, scheduling need be arranged reasonable Operation Mode properly according to the mode of connection and load condition etc., and carry out corresponding accident prediction, influence that may cause when taking place for accident and accident treatment are analyzed in advance and are judged.Because existing systems all is to lay particular emphasis on real time information, after can't reflecting that a certain equipment disconnects, the situation of relevant device automatic safety device action, more can't show information such as network load transfer, therefore scheduling is when the mode of carrying out is arranged, all be by the SCADA(dispatch automated system) or PMS(power transmission and distribution production management system) system manually obtains system topology and machine utilization situation, the loading condition of relevant device behind the hand computation load transfer is to determine best operational mode.The quality of this operational mode depends on operational mode personnel's experience and sense of responsibility fully.When obtaining machine utilization, scheduling can also generate the form of a series of machine utilization situations according to some condition, but when query device specific is loaded, also need manually therefrom to search by the comprehensive inquiry system of SCADA.When visual plant stopped using as a servant, scheduling also needed to write accident prediction, and tradition all is a manual compiling, and speed is slow, and may have mistakes and omissions.
In addition, the senior application in the SCADA dispatching system at present, as the PAS system, can be at 220 kilovolts and above electric pressure equipment, the trend of carrying out interconnected network is calculated and safety check etc.; But, inapplicable for the terminal grid equipment of 220 kilovolts of following electric pressures, and do not consider to fail to have intelligence simultaneously and generate utility functions such as accident prediction because equipment such as automatic safety device shift the influence that causes to trend, great limitation had.
Summary of the invention
The purpose of this invention is to provide a kind of method that accident prediction and operational mode are assessed, function by the expansion automated system, existing operational mode is carried out the science assessment from aspects such as reliability, security and stability analysis, and the influence that can may cause for equipment fault, the assessment and the intelligence of carrying out load transfer, apparatus overload situation, automatic safety device action situation, coverage and relating to aspects such as user generate the scheduling accident prediction.
In order to achieve the above object, technical scheme of the present invention provides a kind of method that accident prediction and operational mode are assessed, and it comprises:
Step a, according to the equipment operating data and the electric parameters information that import, draw the figure of each electric equipment in the network system, and according to the annexation generation system topological structure of figure;
Step b, according to device security automatics action situation and operate time, the action of simulating Safety automatics, and deduce out the trend distribution situation of system behind the load transfer;
Step c, the equipment running status that is provided with in the figure of drawing according to scheduling, and the system topology that provides are assessed the operational mode of system equipment from reliability and static stability aspect;
Steps d, for the different faults trip device, according to trend, the information on load of this equipment that provides, and the other system that the imports electric parameters information of gathering, generate the accident prediction of corresponding different maintenance modes.
Among the step a, the data message of the system equipment that graphing and topological structure are required is the manually operational factor of the electric equipment of importing of scheduling;
Perhaps, by carrying out interconnectedly in real time, obtain the data message of required system equipment with the dispatch automated system SCADA of outside or power transmission and distribution production management system PMS; Provide the electric parameters and the running status amount information of equipment by described dispatch automated system SCADA, the graphical information and the topology information of system is provided by described power transmission and distribution production management system PMS.
Among the step b, as follows to the decision logic of equipment state:
Step b1, under system's normal operating mode, set device always is in running status; Whether tube apparatus does not have from cutting apparatus, and setting this equipment when operational mode is set in scheduling is power down mode, is set at faulty equipment when accident prediction generates;
Step b2, set higher level's grid equipment for normal operation, in terminal network, if subordinate equipment not from cutting apparatus, then the running status of subordinate equipment is identical with the higher level equipment running status, promptly higher level equipment has a power failure, then subordinate equipment power failure; The higher level equipment operation, then subordinate equipment operation;
Step b3, in terminal network, if be provided with from cutting apparatus, so:
Step b3-1, higher level equipment operation, then subordinate equipment operation;
Step b3-2, higher level equipment have a power failure, if subordinate equipment has from cutting apparatus, and tangentially equipment is running status, and the action of then autotomying after the time-delay of certain hour adds to tangential equipment with this subordinate equipment institute on-load;
Step b3-3, higher level equipment have a power failure, if subordinate equipment has from cutting apparatus, and tangential equipment power failure, then autotomy and be failure to actuate;
Step b4, autotomy the action the basis on, if also be provided with Union Switch Device, then judge the position of this subordinate equipment, go forward side by side one the step carry out:
Step b4-1, subordinate equipment be at two, three sections buses, after the time-delay of certain hour, the load of these two, three sections buses is superimposed on one, four section bus, makes equipment operation;
Step b4-2, subordinate equipment are at one, four section bus, after the time-delay of certain hour, the load of this one, four section bus is superimposed on two, three sections buses, pass through the time-delay of certain hour again after, two, the load of three sections buses joins and cuts to one, four section bus, makes equipment operation;
Step b5, the superior and the subordinate's equipment need time of cooperatively interacting during definite value from cutting apparatus, simulate it by program timer and autotomy operate time, it is consistent with the situation of actual act; Scheduling can manually be provided with autotomying the time of equipment.
Among the step c, the evaluation work to operational mode further comprises:
Step c1, power devices reliability assessment:
Supply path to all devices in the electrical network is retrieved, if there is coincidence in any two and above power devices path, thinks that promptly described two and above equipment by the electric equipment single power supply that overlaps the position, do not satisfy power supply reliability; 220 kilovolts of interbus being set being higher level's power supply point, is different 220 kilovolts of interbus as the top equipment of distinct device supply path, thinks that then equipment satisfies power supply reliability;
Step c2, the assessment of equipment static stability:
All devices load and load factor in the electrical network are retrieved,, in heave-load device and overload list of devices, listed respectively if any apparatus load factor surpasses 80% and 100%; In operational mode is arranged, load factor surpassed 80% heave-load device and show; In the accident prediction assessment, promptly under the abnormal running mode, only list load factor and surpass 100% overload equipment;
Step c3, if the assessment result of step c1, c2 does not satisfy related request, after the operational mode of scheduling Adjustment System, repeat above-mentioned steps c1, c2 and assess once more, satisfy the requirement of reliability and static stability, finish setup of run mode up to assessment result.
In the steps d, according to the accident prediction of different maintenance modes, the workflow of carrying out the accident prediction generation is:
Steps d 2, for non-full cut-off accident prediction, list load before and after the accident and load factor contrast, excision load condition statistics, the measure of accident countermeasure, and to the processing of classifying of the loading condition of operation main transformer after the accident:
Steps d 2-1, if operation main transformer overload, retrieval can be routed up the outer circuit in station, goes out the load that circuit can be routed up side by side; Rout up the situation that can cause transformer station of subordinate overload for these circuits, list overload equipment and load factor after routing up, be convenient to scheduling when turning over load, the circuit of load is routed up in decision according to actual conditions;
Steps d 2-2, if the operation main transformer does not transship, retrieval causes subordinate's substation equipment to transship owing to autotomying device name and load factor are convenient to dispatch the load that will autotomy away that determines whether to have ready conditions and are turned back this operation main transformer.
Compared with prior art, the method that accident prediction and operational mode are assessed of the present invention, its advantage is: the present invention can draw the figure and the topological structure of grid equipment, automatically generate the assessment that operational mode and equipment fault are impacted, for establishment operational mode and the decision-making of dispatching accident treatment provide Useful Information:, judge automatically whether operational mode satisfies the requirement of power supply reliability and static stability aspect by the telemetry of topological structure of electric and importing; On the basis of existing system topology, in conjunction with the automatic safety device in the electrical network, simulate that load transfer, electric current after a certain or certain several equipment fault is out-of-limit, automatic safety device action situation, user's dead electricity situation, and under the situation that as far as possible satisfies duplicate supply, for load transfer, mode adjustment etc. provides advisory opinion, and the accident prediction of the different maintenance modes of intelligence generation, for the scheduling accident treatment provides more succinct, practical and effectively handles means.
Description of drawings
Fig. 1 is the hardware configuration schematic diagram of the method that accident prediction and operational mode are assessed of the present invention;
Fig. 2 is the workflow diagram that the equipment action is deduced in the appraisal procedure of the present invention;
Fig. 3 is operational mode workflow being evaluated journey figure in the appraisal procedure of the present invention;
Fig. 4 is the workflow diagram that accident prediction intelligence generates in the appraisal procedure of the present invention.
Embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
The method that accident prediction and operational mode are assessed of the present invention can judge automatically whether operational mode satisfies the requirement of power supply reliability and static stability aspect by the telemetry of topological structure of electric and importing; Can also be according to device security automatics action situation and operate time, the action of simulating Safety automatics, and deduce out the trend distribution situation of system behind the load transfer; In addition, generate accident prediction at designated equipment intelligence, and the accident prediction more information than manual compiling can be provided, as the assessment of relevant device static stability, prioritization etc. behind load transfer direction, the load transfer, the accident prediction formation speed is fast, the accuracy height.
As shown in Figure 1, the hardware that appraisal procedure of the present invention is used, the CS structural configuration of employing client-server connects a station server and the Duo Tai work station that this evaluating system comprises by local area network (LAN).Database information is called by described work station in the main memory system data of described server storehouse, finally realizes evaluation function being equipped with on the computer of client-side program.Described work station also can obtain the required related data information of assessment from the SCADA system (dispatch automated system) that inserts described local area network (LAN) or PMS system (power transmission and distribution production management system).
In the appraisal procedure of the present invention, establish step a, promptly dispatch electrical wiring figure template, draw and generate the figure of a large amount of grid equipments fast by presetting, and according to the figure annexation automatic creation system topological structure of being drawn.Can carry out the manual importing of external data, or the interface by reserving, realization is interconnected in real time with PMS system, SCADA system, and receives its topological structure that provides and graphical information.
The importing of described external data, need scheduling manually from dispatch automated system, to derive the operational factor of selected electric equipment, as device name, electric current, voltage, load, time etc., import in the evaluating system with the EXCEL table, evaluating system is time for reading information automatically, discontinuity surface when generation is a plurality of in system is chosen required time point (as rush hour or low ebb time) for the dispatcher when assessing.For the SCADA system, described evaluating system needs to receive the various electric parameters and the running status amount of power transformation station equipment, and can realize device parameter in the DF8002 SCADA system of Dongfang Electronics, as the collection of electric parameters information such as electric current, load, voltage, realize that data are interconnected.For the PMS system, the CIM file (comprise electrical network graphical information and topology information) of described evaluating system by reading the PMS system, automatic creation system topological sum graphical interfaces, and, realize that data are interconnected by the remote action data of PMS or the electric parameters real-time transmission of information of SCADA.
If step b; promptly according to distinct device relaying protection and automatic safety device action situation and operate time; action by program timer simulation relaying protection and automatic safety device; when in the network system during any apparatus failure removal, just can deduce the operational mode and the trend distribution situation of system behind unit trip and the load transfer automatically.
The network of relative 220 kilovolts and above electric pressure, the variation of trend is mostly to be because a certain equipment disconnects the trend of back multinode network shifts, and generally calculates by inferior method of newton-pressgang or PQ decomposition method etc.; And the terminal electrical network that regional dispatching is faced, the variation of trend mainly is to cause the transfer of load between distinct device owing to the automatic safety device action, what mainly carry out is algorithm calculations.
The load of equipment depends primarily on the state of equipment, i.e. operation or power failure two states.And in terminal network, the automatic safety device (be mainly and autotomy and Union Switch Device) that equipment running status is installed with running status and this equipment of higher level's electrical network again and tangential equipment running status relevant.
Referring to shown in Figure 2, when the equipment action is deduced, as follows to the decision logic of equipment state:
Among the step b1, under the normal operating mode situation, equipment state is running status always; When artificial set device fault,, think that this equipment is power down mode (be equivalent to this equipment is had a power failure, or be made as faulty equipment when accident prediction generates) when operational mode is set in scheduling no matter whether this equipment has from cutting apparatus.
Among the step b2, set higher level's grid equipment and be normal operation, in terminal network, if do not consider to autotomy, the running status of subordinate equipment is identical with the higher level equipment running status, and promptly higher level equipment has a power failure, then subordinate equipment power failure; The higher level equipment operation, then subordinate equipment operation.
Step b3, in terminal network, if consider to autotomy, the running status of subordinate equipment is just not only relevant with the running status of higher level equipment, also whether have with this equipment autotomy (or connection is cut) and tangential equipment running status relevant: at this moment,
Step b3-1, higher level equipment operation, then subordinate equipment operation;
Step b3-2, higher level equipment have a power failure, and autotomy as if subordinate equipment, and tangentially equipment are running status that the action of then autotomying after the time-delay of certain hour adds to tangential equipment with this equipment institute on-load;
Step b3-3, higher level equipment have a power failure, autotomy as if subordinate equipment, and tangential equipment power failure, then autotomy and be failure to actuate.
Among the step b4, on the basis of action of autotomying, cut if also consider connection, then the judgment device position:
Step b4-1, subordinate equipment be at two, three sections buses, after the time-delay of certain hour, the load of these two, three sections buses is superimposed on one, four section bus, makes equipment operation;
Step b4-2, subordinate equipment are at one, four section bus, after the time-delay of certain hour, the load of this one, four section bus is superimposed on two, three sections buses, pass through the time-delay of certain hour again after, two, the load of three sections buses joins and cuts to one, four section bus, makes equipment operation.
Step b5, because the superior and the subordinate autotomy and have different time definite values, therefore also have the different matching problems of autotomying.Evaluating system is simulated the operate time of autotomying by program timer, and it can be matched with the actual conditions of automatic safety device action.In addition, if there is change the time of autotomying, scheduling also can manually be provided with equipment and autotomy the time.
If step c, promptly according to dispatching the network system running status that in figure, is provided with, automatically analyze the network system topology, assess from the reliability of system and the aspects such as static stability of equipment, list the equipment that all do not satisfy duplicate supply, and the apparatus of load rate surpassed the demonstration of classifying of 80% and 100% equipment, be convenient to dispatch the weak spot of grasping network system under the normal operating mode, and the equipment that does not satisfy related request that under existing normal operating mode, also exists, remind to dispatch and in time improve and adjust.
When system operation mode is not changed in scheduling, promptly under system's normal operating mode, whole network equipment is assessed; When scheduling change system operation mode, promptly under system overhaul mode or the abnormal running mode, will assess the equipment that the equipment trend changes, make scheduling can be absorbed in system and change the influence that part causes.According to the assessment result and the adjustment means of system, after the operational mode of scheduling Adjustment System, carry out the system operation mode assessment once more, until satisfying requirements such as reliability and static stability.
Referring to shown in Figure 3, among the step c, specifically following aspect is assessed:
Step c1, the power devices reliability: system is retrieved the supply path of all devices in the electrical network, if there is coincidence in any two and above power devices path, think that promptly these two and above equipment by the electric equipment single power supply that overlaps the position, do not satisfy power supply reliability.220 kilovolts of interbus of operated by rotary motion are higher level's power supply point, are different 220 kilovolts of interbus as the top equipment of distinct device supply path, think that then equipment satisfies power supply reliability.
Step c2, the assessment of equipment static stability: system is retrieved all devices load and load factor in the electrical network, if any apparatus load factor surpasses 80% and 100%, lists in heave-load device and overload list of devices respectively.Generally, in operational mode is arranged, need be to heavy duty, promptly load factor surpasses 80% equipment and shows, reminds the dispatcher to draw attention as the hotspot device under the normal operation; But in accident prediction, owing to be non-normal operating mode, only list overload equipment, promptly load factor surpasses 100% electric equipment.
Among the step c3,, after scheduling can be adjusted operational mode, repeat above-mentioned steps c1, c2 and assess once more, satisfy related request, finish setup of run mode up to assessment result if the assessment result of step c1, c2 does not satisfy related request.
If steps d promptly according to the different faults trip device, based on the trend that imports this equipment, information on load or from the electric parameters information that SCADA or PMS system gather in real time, generates different accident predictions.Cause operational outfit whether to transship for unit trip, the path that can rout up or turn back according to the topological analysis load automatically, or the path is sent in the station electricity consumption under transformer station's full cut-off situation, take all factors into consideration specification requirements such as static-stability, generate pointed and accident prediction practicality, and can on-the-fly modify accident prediction according to importing load and different running method.
Referring to shown in Figure 4, the accident prediction of different maintenance modes generally is divided into non-full cut-off and full cut-off accident prediction.Steps d to the accident prediction assessment specifically comprises:
Steps d 2, for non-full cut-off accident prediction, evaluating system can be listed load before and after the accident and load factor contrast, excision load condition statistics, the measure of accident countermeasure etc., and for the loading condition that moves main transformer after the accident processing of classifying.
Steps d 2-1, if operation main transformer overload, system's retrieval can be routed up the outer circuit in station, go out the load that circuit can be routed up side by side, rout up the situation that can cause transformer station of subordinate overload for these circuits, system also can list overload equipment and the load factor after routing up, and is convenient to scheduling and weighs the advantages and disadvantages when turning over load, and the circuit of load is routed up in decision according to actual conditions.
Steps d 2-2, if the operation main transformer is not when transshipping, system can retrieve owing to cause the device name and the load factor of subordinate's substation equipment overload after autotomying, and is convenient to dispatch the load that will autotomy away that determines whether to have ready conditions and turns back this operation main transformer.
In sum, the present invention is by setting up the evaluating system of " dynamically ", generates the assessment that operational mode and equipment fault are impacted automatically, for the decision-making of establishment operational mode and scheduling accident treatment provides Useful Information.On the basis of existing system topology, in conjunction with the automatic safety device in the electrical network, simulate that load transfer, electric current after a certain or certain several equipment fault is out-of-limit, automatic safety device action situation, user's dead electricity situation, and under the situation that as far as possible satisfies duplicate supply, for load transfer, mode adjustment etc. provides advisory opinion, and the accident prediction of the different maintenance modes of intelligence generation, for the scheduling accident treatment provides more succinct, practical and effectively handles means.Simultaneously, this invention interfaceization, modular graphics edition function are convenient to the definition and the maintenance of system, also are useful trials of following intelligent scheduling.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
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