The Coal Power System To Improve Stability And Reliability Of Research

With the power industry and coal industry, technology continues to evolve, a substantial increase in coal production mines, power coal mining and transport equipment group continue to apply, greatly increasing the load on underground power supply system, the other widely used converter device also Power increase of harmonic content, as well as existing mines such as the protection of power setting with the problem, the system harmonic problems caused by long underground power lines such as excessive pressure drop problems, but also a reliable power supply to the mine grid of a higher requirement. For emerging issues, must take certain measures to solve them, in order to improve mine safety and reliability of supply, but the transformation of a power supply system is the systematic and comprehensive, and the interaction between the issues are closely linked. The mine power supply system to improve safety and reliability issues must be integrated with the above into account, develop a comprehensive integrated power system reliability and improve the coal mine safety programs.This paper appears in coal supply system with the relay, harmonic control, the system resonance, long-distance underground power supply system control problems, according to the actual situation in Xinglong Coal Mine, worked out a specific solution:Underground line protection configuration, transformer protection, anti-mining area of optimal allocation of time relay protection; SVC devices into a successful treatment using harmonics and improve power factor; to Series Capacitors ways to improve the long-distance underground power supply system control; proposed a voltage transformer device neutral point grounding harmonic elimination, elimination of the operational coil to eliminate the resonant success. A brief introduction of the integrated automation system to run programs.Xinglongzhuang power supply system improvements through the above measures, and after a performance test, the success of the system of single-phase earth capacitance current is reduced to 10A below, the successful management of the system harmonics, power factor 0.95 to ensure more effective improve power system stability and reliability.