He Zhuang Coal Mine Power Supply System Study On The Technical Transformation Scheme

Coal mine power supply system is the core of the whole mine, it directly affects the coal mine safety, production and so on various aspects of power supply system is the foundation of modern coal mine production, the reliability of the power supply is one of the basis of coal mine safety. Based on the theory analysis and practice principle, analyze the present situation of the underground power supply system, points out the main problems of power supply system:high-voltage system above the tripping and selective leakage protection of high and low voltage system is not reliable, etc. Analysis and discussion on the problems in the theory, put forward the complete solution. According to the solution of He Zhuang coal mine power supply system is reformed. The main research content is as follows:Based on the theory analysis and practice principle, through to the He Zhuang coal mine power supply system present situation and main problems existed in the system analysis, in view of the high voltage power supply went trip problem, in this paper, the original address above trip high voltage power supply atresia, power supply system is realized by using network technology optimization, double circuit respectively run etc. Through theoretical analysis, the disadvantages of the solution is proposed to improve the signal acquisition, focused, dedicated controller to control the transmission way, realization of high voltage power supply system went against trip problem.In view of the present use of zero sequence current and zero sequence voltage, power direction type electric leakage protection theory analysis, find out the influence is the main reason of the selective sampling error caused by the zero sequence values and direction detection, proposed USES the multiple loop capacitor and resistor connected in parallel on the zero sequence voltage measurements, numerical value and direction measurement is allowed to basically solve the zero sequence parameters, and through the development of special protector, basically solved the low-voltage leakage problem of poor selectivity.He Zhuang through the field practice and the great trip and electric leakage protection exist in the coal mine power supply system is not reliable, through this article research and practice of nearly one year running at the scene, basic to achieve the purpose of the design modification, ensure the safety and reliability of He Zhuang coal mine power supply system is running. In this paper, the research achievements of exist universal guiding significance to coal mine power supply security.