基于上游正序参数比较的电压暂降源定位方法  

Voltage Sag Source Location Method Based on Comparison of Upstream Positive Sequence Parameters

作　　者：孟庆伟[1] 高涵 贾志恒 钟振芳[1] 何家宇 MENG Qingwei;GAO Han;JIA Zhiheng;ZHONG Zhenfang;HE Jiayu(College of New Energy,China University of Petroleum(East China),Qingdao 266580,China;Weifang Power Supply Company of State Grid Shandong Electric Power Company,Weifang 261000,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东省青岛市266580 [2]国网山东省电力公司潍坊供电公司,山东省潍坊市261000

出　　处：《电力系统自动化》2022年第13期177-186,共10页Automation of Electric Power Systems

基　　金：山东省重点研发计划资助项目(2019GGX103045)。

摘　　要：电压暂降源的上下游定位有着明确供用电双方责任的作用。面对传统定位方法中负荷模型适用性差的难题,文中以戴维南等效模型为基础,通过比较电压暂降前后上游正序参数的变化,提出了一种电压暂降源定位方法。首先,对上游正序参数进行辨识,通过比较电压暂降前后上游系统正序参数的变化来确定电压暂降源的上下游位置。考虑参数不确定性、计算误差和测量误差的影响,提出了基于概率的改进判据。考虑误差对定位结果的影响,在定位模糊区域内引入概率型指标,定量分析了引起电压暂降上下游双方的责任,提高了定位结果的合理性。最后,通过IEEE标准模型验证了所提方法的正确性和有效性。The upstream and downstream locating of the voltage sag source plays a role in clarifying the responsibilities of both the power supplier and the consumer. Facing the problem of poor applicability of the load model in the traditional location method,based on the Thevenin equivalent model, this paper proposes a voltage sag source location method by comparing the changes of the upstream positive sequence parameters before and after the voltage sag. Firstly, the upstream positive sequence parameters are identified, and the upstream and downstream positions of the voltage sag source are determined by comparing the changes of upstream system positive sequence parameters before and after the voltage sag. Considering the influence of parameter uncertainty,calculation error and measurement error, an improved criterion based on the probability is proposed. Considering the influence of errors on the location results, a probability index is introduced into the location fuzzy area, to quantitatively analyze the responsibilities of the upstream and downstream parties that cause the voltage sag, which improves the rationality of the location results. Finally, the correctness and effectiveness of the proposed method are verified by the IEEE standard model.

关 键 词：电能质量 电压暂降 电压暂降源定位 上下游定位 概率型判据 

分 类 号：TM714.2[电气工程—电力系统及自动化]