暂态电能质量扰动引发电压变动对闪变检测的影响  

Influence of voltage variation caused by transient power quality disturbance on flicker detection

作　　者：汪清 游奕弘 赵誉洲 朱明星[2] 焦亚东[2] 高敏 WANG Qing;YOU Yihong;ZHAO Yuzhou;ZHU Mingxing;JIAO Yadong;GAO Min(New Smart City High-Quality Power Supply Joint Laboratory of China Southern Power Grid(Shenzhen Power Supply Co.,Ltd.),Shenzhen 518020,China;School of Electrical Engineering and Automation,Anhui University,Hefei 230601,China)

机构地区：[1]南方电网公司新型智慧城市高品质供电联合实验室(深圳供电局有限公司),广东深圳518020 [2]安徽大学电气工程与自动化学院,安徽合肥230601

出　　处：《电力系统保护与控制》2022年第6期91-99,共9页Power System Protection and Control

基　　金：南方电网公司科技项目资助(090000KK52190169/SZKJXM2019669)。

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。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.

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 

分 类 号：TM711[电气工程—电力系统及自动化]