The Potential Difference Characteristics between Two Points on Grounding Grid of Substation
With the intelligentization upgrade of power substations, a large number of secondary equipment are deployed dispersedly nearby the high-voltage primary equipment. The enclosures of these secondary devices are electrically connected to the grounding grid underground. When a fault current injection c...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2021-01-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201907046 |
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| author | Yonghong WANG Chongqing JIAO Bing XIAO Anqi GUO Guizhong QIU Lipeng BI Keqiang XU |
| author_facet | Yonghong WANG Chongqing JIAO Bing XIAO Anqi GUO Guizhong QIU Lipeng BI Keqiang XU |
| author_sort | Yonghong WANG |
| collection | DOAJ |
| description | With the intelligentization upgrade of power substations, a large number of secondary equipment are deployed dispersedly nearby the high-voltage primary equipment. The enclosures of these secondary devices are electrically connected to the grounding grid underground. When a fault current injection causes the potential rise in the grounding grid, there is a potential difference between any two points on the grounding grid conductors. For two secondary equipment located at different positions and connected by secondary cable, the potential difference can induce common-mode and differential-mode disturbance voltages at the ports of the secondary cable, which may interfere the normal operation of secondary system. In this paper, the grounding grid of a 220 kV substation is modelled and the corresponding potential difference is calculated by using the CDEGS software. Also, the effects of the grid density and size, soil resistivity, the positions of current injection and potential observation on the potential difference are investigated. The results are helpful for guiding grounding grid design and evaluating the influence of ground potential difference on secondary equipment. |
| format | Article |
| id | doaj-art-40f0df3804a04b4cb5aea033c37f3c83 |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2021-01-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-40f0df3804a04b4cb5aea033c37f3c832025-08-20T02:05:04ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492021-01-0154115015810.11930/j.issn.1004-9649.201907046zgdl-52-11-wangyonghongThe Potential Difference Characteristics between Two Points on Grounding Grid of SubstationYonghong WANG0Chongqing JIAO1Bing XIAO2Anqi GUO3Guizhong QIU4Lipeng BI5Keqiang XU6State Grid Inner Mongolia East Electric Power Co., Ltd. Power Science Research Institute, Hohhot 010020, ChinaState Key Laboratory of Alternate Electric Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Grid Inner Mongolia East Electric Power Co., Ltd. Power Science Research Institute, Hohhot 010020, ChinaState Key Laboratory of Alternate Electric Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Grid Inner Mongolia East Electric Power Co., Ltd. Power Science Research Institute, Hohhot 010020, ChinaState Grid Inner Mongolia East Electric Power Co., Ltd. Power Science Research Institute, Hohhot 010020, ChinaHengjingtong Electronic Technology Co., Ltd., Nanjing 210000, ChinaWith the intelligentization upgrade of power substations, a large number of secondary equipment are deployed dispersedly nearby the high-voltage primary equipment. The enclosures of these secondary devices are electrically connected to the grounding grid underground. When a fault current injection causes the potential rise in the grounding grid, there is a potential difference between any two points on the grounding grid conductors. For two secondary equipment located at different positions and connected by secondary cable, the potential difference can induce common-mode and differential-mode disturbance voltages at the ports of the secondary cable, which may interfere the normal operation of secondary system. In this paper, the grounding grid of a 220 kV substation is modelled and the corresponding potential difference is calculated by using the CDEGS software. Also, the effects of the grid density and size, soil resistivity, the positions of current injection and potential observation on the potential difference are investigated. The results are helpful for guiding grounding grid design and evaluating the influence of ground potential difference on secondary equipment.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201907046cdegspower substationgrounding gridground potential differenceovervoltage protection and grounding |
| spellingShingle | Yonghong WANG Chongqing JIAO Bing XIAO Anqi GUO Guizhong QIU Lipeng BI Keqiang XU The Potential Difference Characteristics between Two Points on Grounding Grid of Substation Zhongguo dianli cdegs power substation grounding grid ground potential difference overvoltage protection and grounding |
| title | The Potential Difference Characteristics between Two Points on Grounding Grid of Substation |
| title_full | The Potential Difference Characteristics between Two Points on Grounding Grid of Substation |
| title_fullStr | The Potential Difference Characteristics between Two Points on Grounding Grid of Substation |
| title_full_unstemmed | The Potential Difference Characteristics between Two Points on Grounding Grid of Substation |
| title_short | The Potential Difference Characteristics between Two Points on Grounding Grid of Substation |
| title_sort | potential difference characteristics between two points on grounding grid of substation |
| topic | cdegs power substation grounding grid ground potential difference overvoltage protection and grounding |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201907046 |
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