基于Petri网的750kV变电站故障恢复

对750 kV变电站可能发生的常见故障进行详细分类,并据此建立故障恢复推理模型,以便发生故障时能及时快速恢复供电。通过分析750 k V变电站拓扑结构,采用故障分类和基于Petri网建模的方法,将所有可能发生的常见故障分为母线、线路及变压器3类。变电站发生故障时,先根据变电站故障诊断结果,再从故障点隔离到恢复非故障失电区域并建立Petri网模型。故障恢复主要对开关进行操作,因此首先建立开关打开和关断的基本Petri网恢复模块,接着从变压器运行方式及裕量情况给出变压器故障恢复的Petri网模型,然后讨论母线和线路故障时不同情况下的故障恢复Petri网模型,最后根据模型推理过程中点火的变迁,将隔离故障点和恢复供电的断路器记录下来,按照Petri网运行的顺序即可给出最终的恢复方案。通过对750 k V变电站各类复杂故障的建模和推理及由此给出的恢复方案,能够及时给出恢复的操作顺序,方便运行人员快速检修。最后通过HPSim软件对代表性故障进行仿真运行,验证该方法正确、可行且及时。

Fault self-restoration for the 750 kV transformer substation based on Petri net

In accordance with the actual faults which may occur from time to time in or with the 750 kV transformer substations,the essay has to classify such mishaps into necessary subdivisions in detail.The models of the fault restoration are actually built up based on the following classifications.For example,some faults can be made quickly restored as soon as they occur.For such faults,ratiocination,or a certain mechanism lying behind,can play an important supplementary role on running the substation,for it is possible to analyze the topological structure of 750 kV substation with the method of fault classification and/or the model of the Petri net.In such a situation,three major faults can usually be found,that is,the faults with the bus,with the line and with the transformer.In case the substation goes wrong,it is necessary to analyze the topology structure of 750 kV substations through the fault classification and models of the Petri net,which are built by insulating the point to recover the loss of the areas to the state of non-failure as a result of fault diagnosis.On the other hand,when the faults happen,it can be made readily restored and recovered.It is because the ratiocination can play a significant supplementary function for the running of the substation.Such a kind of fault restoration can mainly help to operate the switches.And forthis kind of function,the basic model should be primarily built up with the turn-on and turn-off function of the switches and circuits.And,so is with the Petri net models of the fault restoration of transformers to the way and the max amount of the transformers.Thus,through the modeling and reasoning of the different complex faults in 750 kV substation,the project can provide an operation order of the timely recovery,which is also convenient for the workers to examine and repair the system readily.Besides,the representative faults can be simulated via the software named HPSim and expected to be able to provide a model of Petri net and its running.Therefore,the results can help to verify the validity,practicability and real-time advantage of the method.