Severity evaluation of multistage voltage sag based on an improved analytic hierarchy process

被引：0
|
作者：
Ma, Li [1 ]
Chen, Yingyu [1 ]
Tian, Dingrong [1 ]
Lou, Jinghui [1 ]
Li, Yu [1 ]
Zhang, Yanhu [1 ]
机构：
[1] School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an,710054, China
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2023年 / 51卷 / 17期
关键词：
Abstract: It is important to accurately evaluate the severity of multistage voltage sag for the stable operation of sensitive devices and the governance of voltage sag. This paper presents a method for evaluating the severity of multistage voltage sag based on an improved analytic hierarchy process. First; the multistage voltage sag waveform of the reclosing process under transient and permanent faults is analyzed. Then; the voltage sag evaluation by the weight function method is used to calculate the severity of each stage sag. Based on the time characteristic of process immunity; the multistage voltage sag PIT characteristic curve of a sensitive device is described. Taking advantage of the correlation and severity index value of each stage sag; the weight of each stage sag is determined. The multistage voltage sag severity can be evaluated quantitatively. Finally; the modified IEEE-30 system is used for simulation verification. The results show that the proposed method is reasonable and effective. It reduces the subjectivity of the evaluation results and provides a basis for the evaluation and governance of multistage voltage sag of a sensitive device. This work is supported by the National Natural Science Foundation of China (No. 51777166). Key words: multistage voltage sag; short circuit fault; reclosing; severity assessment; AHP; PIT curve;
D O I：
10.19783/j.cnki.pspc.221734
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页码：49 / 57
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