西藏某220 kV变电站接地网状态评估与改造
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摘要
利用CDEGS接地分析软件对西藏某220 kV变电站接地网进行状态评估,从接地网的接地电阻、跨步电压和接触电压进行全面评估。提出把原接地网的外引接线改造成梯形接地网,并加密梯形接地网,且在最外端敷设10 m长的垂直接地极的改造方案,改造效果表明,该方案使跨步电压和接触电压满足了安全限值,保证了人员安全和变电站安全运行。
The grounding analysis software CDEGS was used to evaluate the state of a 220 kV substation grounding grid in Tibet. This paper comprehensively evaluated the grounding resistance, step voltage and contact voltage of the grounding grid and proposed to transform the external lead wire of the original grounding grid into a trapezoidal grounding net, encrypting the trapezoidal grounding net, and set up a 10 m long vertical grounding pole at the outermost end to make the step voltage and contact voltage meet the safety limit, which ensures the personnel safety and substation safe operation.
The grounding analysis software CDEGS was used to evaluate the state of a 220 kV substation grounding grid in Tibet. This paper comprehensively evaluated the grounding resistance, step voltage and contact voltage of the grounding grid and proposed to transform the external lead wire of the original grounding grid into a trapezoidal grounding net, encrypting the trapezoidal grounding net, and set up a 10 m long vertical grounding pole at the outermost end to make the step voltage and contact voltage meet the safety limit, which ensures the personnel safety and substation safe operation.
引文
[1]李谦.电力系统接地网特性参数测量与应用[M].北京:中国电力出版社,2013.
[2]陈坤汉.500 kV横沥变电站接地网状态评估与改造[J].电瓷避雷器,2011(3):61-64.
[3]豆朋,龚瑛,张劲松,文习山.利用CDEGS软件对大型接地网进行评估与改造的研究[J].电气应用,2007(4):2-4.
[4]王如飞.应如何选择变电站接地网降阻措施的探讨[J].科技风,2017(22):176.
[5]贾晓娟.变电站接地网优化设计及安全性评估[D].北京:华北电力大学,2016.
[6]电力工业部绝缘配合标准化技术委员会.交流电气装置的接地:DL/T 621—1997[S].北京:中国电力出版社,1997:1-3.
[7]池丽钧,成文杰,陈俊平,等.变电站接地网优化设计分析[J].江西电力职业技术学院学报,2016,29(3):19-22.
[8]李莉.500 kV变电站大型接地网状态评估[D].广州:华南理工大学,2010.
[9]李宇恒.35 k V变电站立体接地网设计问题研究[J].机电工程技术,2017,46(7):100-101.
[10]王平,贾立莉,李守学,李抗,律方成.110 kV全户内智能变电站接地网优化设计[J].中国电力,2018,51(3):42-48.
[11]王东烨,董刚.大型变电所地网评估若干问题的探讨[J].高电压技术,2001,27(2):64-65.
[2]陈坤汉.500 kV横沥变电站接地网状态评估与改造[J].电瓷避雷器,2011(3):61-64.
[3]豆朋,龚瑛,张劲松,文习山.利用CDEGS软件对大型接地网进行评估与改造的研究[J].电气应用,2007(4):2-4.
[4]王如飞.应如何选择变电站接地网降阻措施的探讨[J].科技风,2017(22):176.
[5]贾晓娟.变电站接地网优化设计及安全性评估[D].北京:华北电力大学,2016.
[6]电力工业部绝缘配合标准化技术委员会.交流电气装置的接地:DL/T 621—1997[S].北京:中国电力出版社,1997:1-3.
[7]池丽钧,成文杰,陈俊平,等.变电站接地网优化设计分析[J].江西电力职业技术学院学报,2016,29(3):19-22.
[8]李莉.500 kV变电站大型接地网状态评估[D].广州:华南理工大学,2010.
[9]李宇恒.35 k V变电站立体接地网设计问题研究[J].机电工程技术,2017,46(7):100-101.
[10]王平,贾立莉,李守学,李抗,律方成.110 kV全户内智能变电站接地网优化设计[J].中国电力,2018,51(3):42-48.
[11]王东烨,董刚.大型变电所地网评估若干问题的探讨[J].高电压技术,2001,27(2):64-65.