This paper researches the voltage transfer characteristics when one-phase ground fault occurred in the resistance grounding system, by using the theory of the asymmetric variable characteristics and the sequence network analysis of the -11 transformer, and concludes the scope of voltage sag and swell and the degree of power frequency overvoltage and their influencing factors in the 110 kV resistance grounding system. Accordingly this paper puts forward the resistance choosing principle: the resistance grounding coefficient must be equal to or greater than 10. So it can not only wipe out the voltage sag and voltage swell but also make sure the overvoltage is limited to electrical equipment allowing range. The method mentioned above is verified by simulation results of a 110 kV power system in ATP.
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机译:金属和非金属矿山安全和健康调查报告:地下非金属矿(石灰石(压碎和破碎))致命人员意外坠落,2014年2月27日,Interstate power systems,Inc。承包商I.D.位于爱荷华州story County ames的ames mine的martin marietta materials公司的T02号。矿山I.D.第13-00014号