引用本文: | 汪 清,游奕弘,赵誉洲,等.暂态电能质量扰动引发电压变动对闪变检测的影响[J].电力系统保护与控制,2022,50(6):91-99.[点击复制] |
WANG Qing,YOU Yihong,ZHAO Yuzhou,et al.Influence of voltage variation caused by transient power quality disturbance on flicker detection[J].Power System Protection and Control,2022,50(6):91-99[点击复制] |
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摘要: |
随着电能质量在线监测系统建设的深入,IEC规定的数据标记已不能应对暂态电能质量扰动在传播过程中引发的电压变动对闪变检测的不利影响,给闪变源定位方面的技术监督工作带来巨大挑战。针对该现状定义了暂态电压变动并给出刻画其电压均方根值形状的特征量,而后基于IEC闪变仪分析各特征量变化对闪变检测结果的影响特性及程度,实现考虑背景的暂态电压变动引起闪变水平的量化,给出幅值差的限值建议,并通过实例验证。最后面向不同场景在线监测数据,总结长时闪变月趋势数据分布特征,提出应用统计学准则的四分位数判别方法,分析结果表明了该方法的有效性,为暂态电压变动造成闪变超标的监测点快速筛查提供可选方法。 |
关键词: 暂态电能质量扰动 暂态电压变动 特征量 闪变 四分位数法 |
DOI:DOI: 10.19783/j.cnki.pspc.210748 |
投稿时间:2021-06-24修订日期:2021-10-08 |
基金项目:南方电网公司科技项目资助(090000KK52190169/ SZKJXM2019669) |
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Influence of voltage variation caused by transient power quality disturbance on flicker detection |
WANG Qing,YOU Yihong,ZHAO Yuzhou,ZHU Mingxing,JIAO Yadong,GAO Min |
(1. New Smart City High-Quality Power Supply Joint Laboratory of China Southern Power Grid (Shenzhen Power
Supply Co., Ltd.), Shenzhen 518020, China; 2. School of Electrical Engineering and
Automation, Anhui University, Hefei 230601, China) |
Abstract: |
With the development of an online power quality monitoring system, the data flagged stipulated by IEC can no longer cope with the adverse impact of voltage variation caused by transient power quality disturbance on flicker detection. This brings great challenges to the technical supervision of flicker source location. Given this, this paper defines the transient voltage variation and gives the characteristic quantity to describe the shape of RMS voltage. Then, based on the IEC flicker meter, it analyzes the influence characteristics and degree of each characteristic quantity variation on flicker detection results, realizes the quantification of flicker level caused by transient voltage variation considering the background, and gives limit value suggestions of amplitude difference. This is verified by an example. Finally, the distribution characteristics of monthly trend data of Plt are summarized based on the data of online monitoring in different scenarios, and a quartile discrimination method using statistical criteria is proposed. The analysis results show the effectiveness of the method. It provides an optional method for rapid screening of monitoring points with flicker exceeding the standard caused by transient voltage variation.
This work is supported by the Science and Technology Project of China Southern Power Grid Company Limited (No. 090000KK52190169/SZKJXM2019669). |
Key words: transient power quality disturbance transient voltage variation characteristic quantity flicker quartile method |