接地装置冲击接地电阻的测量与特性研究  

Research on Measurement and Characteristic of Grounding Device Impulse Grounding Resistance

作　　者：王汀[1] 李冠华[1] 金鑫[1] 毕海涛[1] 

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,辽宁沈阳110006

出　　处：《东北电力技术》2016年第8期12-14,17,共4页Northeast Electric Power Technology

摘　　要：冲击接地电阻一般用来评估雷击短路情况下的接地装置的安全性,目前国内针对接地装置冲击特性的研究相对较少,尚无法准确了解其规律及特点。为准确掌握接地装置的冲击特性,从仿真计算和场地试验两方面入手,建立了合理的接地装置暂态模型,结合土壤放电特性、频变特性及材质规格等因素进行全面综合考量,深入分析了冲击接地特性与工频特性、环境条件及工程实际应用价值等方面的影响规律。The impulse grounding resistance is commonly used to evaluate the safety of grounding device in lightning short circuit con- ditions, the current domestic study of grounding device are relatively few, it is unable to accuartely understand the rules and character- istics. To accurately grasp the impact characteristics, from two aspects of the simulation calculation and field test, a reasonable grounding device transient model is established. Comprehensively considering the factors such as oil discharge characteristic, frequency characteristic and material specification, the impact characteristics, power frequency characteristics, environmental condi- tions and the value of engineering application are analyzed in detail.

关 键 词：接地装置 冲击特性 频变特性 

分 类 号：TM862[电气工程—高电压与绝缘技术]