Development And Research On Analysis And Discrimination Of Electrical Equipment Status

Presently, maintenance mode in domestic power system mainly relies on preventive test maintain, actually it is a goal pursued many years by power workers that realizing status maintenance on power equipment. Preventive test maintenance has shortcomings that time-consuming, hard sledding, etc. while the online monitoring technology on power equipment. is not mature still. Therefore, in order to control equipment status in time, discriminate fault on power equipment correctly, this thesis proposes developing expert system on analysis and discrimination of electrical equipment status. It not only combines method of preventive test maintenance, but has significant meaning to status maintenance and fault discrimination of power equipment.This expert system is mainly composed by off-line detection, the discrimination judgment refers to preventive test regulation, comprehensive analysis and discrimination is based on operation conditions of equipment. the system compares tested equipment longitudinally and transversely according to stored equipment test data, to judge its develop trends, providing basis for making a reasonable maintain strategy. It can be applied on multiple electrical main equipment, i.e. power transformer, current transformer, voltage transformer, circuit break and zinc oxide lightning arrestor. System design is divided into database module, data editing module, diagnosis and analysis module and management module, respectively used as data storage, data edition, data analysis and diagnosis, interface of customer and data. The system adopts Browser/Server structure, using ASP.NET technology, based on visual studio.net platform, using C# language, based on web form page development.An example verifies that, by using this expert system, status and diagnosis can be done on power transformer, current transformer, zinc oxide lightning arrestor and capacitor voltage transformer. The specific case shows, this system has characters that interface is clear, easy to do operation; it has function that provides more detailed diagnosis result, it also has the relevant remind attention function; it can intuitively show change trends of power equipment, making it easy to constitute reasonable maintain strategy; operation page is web page, which is easy to operate in network, with character of long-distance communication.