Relay Fault Information Processing System In Power System

When complex fault occurs or uncertain factors appear such as mal-operation, miss operation and missing messages because of channel disturbance, the existing power system diagnosis methods base on switch and protection messages does not provide satisfactory result, So it is necessary to use a new source of information. Along with the establishment of the information network for protective relaying and fault recorders , the plentiful recorded fault data lay a foundation for further diagnosis of the faults .According to the current operating situations of power systems and its evolution in the future, a new approach to carry out hierarchical fault diagnosis by using the collected messages is proposed. After recorded fault messages rationally, A corresponding synthetic diagnosis model is established. Thus, the limitations of using the protection and switch messages are effectively remedied.In accordance with characteristics of the large amount and various types of the management information of relay protection. At last .the conventional and advanced applications of protective relaying such as setting check and fault location are discussed.