电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2014年
4期
96-100
,共5页
接地网%电位分布%电位梯度%接触电压%跨步电压%安全性
接地網%電位分佈%電位梯度%接觸電壓%跨步電壓%安全性
접지망%전위분포%전위제도%접촉전압%과보전압%안전성
substation%potential distribution%potential gradient%grounding grid%touch voltage%step voltage%security
以某220kV变电站接地网为例，对其安全性进行了分析。针对变电站接地网的接地电阻、电位分布、电位梯度以及跨步电压和接触电压等参数，基于恒流场理论，运用表面电荷法和格林函数原理进行计算和分析。依据上述计算结果对此变电站接地网的安全性和可靠性进行分析、评价，同时，为变电站更好的运行提出了一些改进意见，使变电站接地网的安全可靠性得到明显提高。
以某220kV變電站接地網為例，對其安全性進行瞭分析。針對變電站接地網的接地電阻、電位分佈、電位梯度以及跨步電壓和接觸電壓等參數，基于恆流場理論，運用錶麵電荷法和格林函數原理進行計算和分析。依據上述計算結果對此變電站接地網的安全性和可靠性進行分析、評價，同時，為變電站更好的運行提齣瞭一些改進意見，使變電站接地網的安全可靠性得到明顯提高。
이모220kV변전참접지망위례，대기안전성진행료분석。침대변전참접지망적접지전조、전위분포、전위제도이급과보전압화접촉전압등삼수，기우항류장이론，운용표면전하법화격림함수원리진행계산화분석。의거상술계산결과대차변전참접지망적안전성화가고성진행분석、평개，동시，위변전참경호적운행제출료일사개진의견，사변전참접지망적안전가고성득도명현제고。
In this paper, a 220kV substation grounding grid is taken as an example to analyze the security of the system. Based on the constant current field theory, the surface charge method and Green function are used to calculate and analyze the parameters of the grounding grid, such as grounding resistance, potential distribution, potential gradient, step voltage and touch voltage. According to the above calculated results, the paper analyzes and evaluates the security and reliability of the substation grounding grid. The paper also put forwards some suggestions on better operation of the substation, which can highly improve the security and reliability of substation grounding grids.
