Xiangyang can mechanical and electrical equipment Co., Ltd is located in Chinese famous historical and cultural city, xiangyang city, hubei province high and new technology industry development zone, is ze east corp. 's national high and new technology enterprise, or (south) of nine provinces in wuhan electric theory association governing units. Company products "DJDX series distributed small grounding current of single-phase grounding line selection system" has passed the appraisal of China federation of electric power enterprises, appraisal committee thinks "product overall performance reaches the domestic leading level, line selection accuracy above 98%. "

Company main business is research and development production "distributed small current grounding line selection system", "zero sequence current transformer", "high power motor soft start equipment, and other products. Company products are widely used in electric power, petroleum, coal, railway, mining, large chemical industry, building materials enterprises substation 6 ~ 35 kv power supply system.

In 2008 the company successfully developed the first domestic DJDX - 08 distributed small current grounding line selection system, the system consists of the host, data acquisition, high precision splitter to select zero sequence current transformer of three parts, the distributed network structure, the main characteristic of this structure is multiple processors work at the same time, realize the real-time object tracking, a variety of data synchronization acquisition and processing, reduce the burden of the host, raised the concept of timeliness. In addition to the limitations of single line selection method, we used the multiple comprehensive line selection criterion of the fuzzy inference method, is to use "the fundamental wave ratio than that of the algorithm", "five harmonic algorithm", "the first half wave algorithm", "power direction algorithm" and various theoretical analysis methods

Analysis, and then use the method of fuzzy inference judging criterion of multiple routing data synthetically, finally it is concluded that the correct line selection results. After more than in the country's 300 substations more than three years of use proved: The system integrated line selection accuracy of more than 98%, has reached the domestic leading level of the same device. Realized the batch used especially in hubei power grid, get the user's wide acclaim (visible users report)