A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index
In order to systematically compare the voltage sag severity of different regions, a system method is proposed to assess grid voltage sag severity. The method obtains the time duration intervals through cluster analysis, and gets the medians of residual voltages for different duration intervals, with...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2020-11-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202006095 |
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| author | Qing ZHONG Weilin YAO Zhong XU Kai ZHOU Gang WANG |
| author_facet | Qing ZHONG Weilin YAO Zhong XU Kai ZHOU Gang WANG |
| author_sort | Qing ZHONG |
| collection | DOAJ |
| description | In order to systematically compare the voltage sag severity of different regions, a system method is proposed to assess grid voltage sag severity. The method obtains the time duration intervals through cluster analysis, and gets the medians of residual voltages for different duration intervals, with which the median line is plotted. And then, the average point-to-line distance index is proposed to quantify the voltage sag severity for different regions. The voltage sag levels are graded according to index distribution features of different regions. The correctness and feasibility of the proposed assessment method are verified with the real monitoring data of a city power system. This method can effectively obtain from numerous monitoring data the voltage sag severity information of different regions, and realize the system assessment of the voltage sags from two dimensions: residual voltage and time duration, which is conducive to compare the voltage sag severity among different regions. |
| format | Article |
| id | doaj-art-3e7daaf1e5054140b0a36a3441eb7964 |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2020-11-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-3e7daaf1e5054140b0a36a3441eb79642025-08-20T02:52:44ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492020-11-01531191410.11930/j.issn.1004-9649.202006095zgdl-53-11-zhongqingA System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance IndexQing ZHONG0Weilin YAO1Zhong XU2Kai ZHOU3Gang WANG4School of Electric Power, South China University of Technology, Guangzhou 510641, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510641, ChinaGuangzhou Power Supply Bureau Co. Ltd., Guangzhou 510600, ChinaGuangzhou Power Supply Bureau Co. Ltd., Guangzhou 510600, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510641, ChinaIn order to systematically compare the voltage sag severity of different regions, a system method is proposed to assess grid voltage sag severity. The method obtains the time duration intervals through cluster analysis, and gets the medians of residual voltages for different duration intervals, with which the median line is plotted. And then, the average point-to-line distance index is proposed to quantify the voltage sag severity for different regions. The voltage sag levels are graded according to index distribution features of different regions. The correctness and feasibility of the proposed assessment method are verified with the real monitoring data of a city power system. This method can effectively obtain from numerous monitoring data the voltage sag severity information of different regions, and realize the system assessment of the voltage sags from two dimensions: residual voltage and time duration, which is conducive to compare the voltage sag severity among different regions.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202006095power qualityvoltage sagsystem assessmentpoint-to-line distance |
| spellingShingle | Qing ZHONG Weilin YAO Zhong XU Kai ZHOU Gang WANG A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index Zhongguo dianli power quality voltage sag system assessment point-to-line distance |
| title | A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index |
| title_full | A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index |
| title_fullStr | A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index |
| title_full_unstemmed | A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index |
| title_short | A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index |
| title_sort | system assessment method for voltage sag severity based on average point to line distance index |
| topic | power quality voltage sag system assessment point-to-line distance |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202006095 |
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