基于平均点线距的电压暂降系统级评估方法

doi:10.11930/j.issn.1004-9649.202006095

中国电力 ›› 2020, Vol. 53 ›› Issue (11): 9-14.DOI: 10.11930/j.issn.1004-9649.202006095

• 国家“十三五”智能电网重大专项专栏：（二）电能质量及其治理技术专栏 • 上一篇下一篇

基于平均点线距的电压暂降系统级评估方法

钟庆¹, 姚蔚琳¹, 许中², 周凯², 王钢¹

1. 华南理工大学电力学院，广东广州 510641;
2. 广州供电局有限公司，广东广州 510600

收稿日期:2020-06-08 修回日期:2020-09-18 出版日期:2020-11-05 发布日期:2020-11-05
通讯作者: 中国南方电网公司科技项目(GZHKJXM20170141)
作者简介:钟庆(1978—)，男，博士，教授，博士生导师，从事电能质量分析与控制研究，E-mail：epqzhong@scut.edu.cn;姚蔚琳(1996—)，女，通信作者，硕士研究生，从事电能质量分析与控制研究，E-mail：1094940057@qq.com;许中(1986—)，男，硕士，高级工程师，从事电能质量分析与电力技术监督管理，E-mail：xuzhonggz@qq.com;周凯(1993—)，男，硕士，从事电能质量分析与电力技术监督管理，E-mail：285358753@qq.com;王钢(1966—)，男，教授，从事电力系统保护控制、高压直流输电技术等研究，E-mail：wangg@scut.edu.cn
基金资助:
This work is supported by Science and Technology Project of China Southern Power Grid (No.GZHKJXM20170141)

A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index

ZHONG Qing¹, YAO Weilin¹, XU Zhong², ZHOU Kai², WANG Gang¹

1. School of Electric Power, South China University of Technology, Guangzhou 510641, China;
2. Guangzhou Power Supply Bureau Co. Ltd., Guangzhou 510600, China

Received:2020-06-08 Revised:2020-09-18 Online:2020-11-05 Published:2020-11-05

摘要/Abstract

摘要： 为系统比较不同区域电压暂降的严重程度，从电网电压暂降整体水平出发，提出了系统级的电压暂降严重程度评估方法。该方法通过聚类分析确定持续时间区段，求取不同持续区段内残余电压的中位数并绘制中位数线。随后提出平均点线距指标以量化评估各个区域电压暂降严重程度，并根据不同区域的指标分布特征进行电压暂降水平等级划分。某市实际监测数据的评估验证了所提方法的正确性与合理性。该方法能在大量监测数据中有效提取不同区域电压暂降的严重程度信息，从残余电压和持续时间2个维度实现电压暂降的系统级评估，有利于区域间电压暂降水平的对比。

关键词: 电能质量, 电压暂降, 系统级评估, 点线距

Abstract: 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.

Key words: power quality, voltage sag, system assessment, point-to-line distance

钟庆, 姚蔚琳, 许中, 周凯, 王钢. 基于平均点线距的电压暂降系统级评估方法[J]. 中国电力, 2020, 53(11): 9-14.

ZHONG Qing, YAO Weilin, XU Zhong, ZHOU Kai, WANG Gang. A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index[J]. Electric Power, 2020, 53(11): 9-14.

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https://www.electricpower.com.cn/CN/Y2020/V53/I11/9

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基于平均点线距的电压暂降系统级评估方法

A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index

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基于平均点线距的电压暂降系统级评估方法

A System Assessment Method for Voltage Sag Severity Based on Average Point-To-Line Distance Index

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