An Expert System For Switch Operation Planning On Line Dispatching

Abstract

An expert system is presented that produces the operation sequence for disconnecting apparatuses from a power system under normal operating conditions.To keep the reliablity of power supply on the network during the operation, the operation sequence must be produced in due consideration of network states, such as load factors and routes of transmission line. Besides, since the network which system manages, includes many high-voltage consumers, the operation sequence for each consumer should be divided into detailed switch operation sequence.So as to produce detailed switching operation sequence simultaneously with macro network operation sequence, we introduce the multi-layered object-oriented network model for the knowl edge base of this expert system.Each layer of this model represents network configuration in the different degree of detail, and the consistency between states of layers is maintained by inter-layer message-passing mechanism. On the layer which represents apparatuses and their connections in detail, the inference engine can generate the switching operation sequence. On another layer which represents control centers and consumers, the inference engine can search for routes of power supply and can generate the sequence of changing over the network. Therefore, by using each layers properly, the inference engine can produce various kinds of operation sequences.Furthermore the object-oriented network model makes easy maintenance and extension of the system.