电压暂降严重程度及其测度_不确定性评估方法.pdf

34 4 Vol.34 No.4 Feb.5, 2014 644 2014 2 5 Proceedings of the CSEE ©2014 Chin.Soc.for Elec.Eng. DOI 10.13334/j.0258-8013.pcsee.2014.04.017 0258-8013 (2014) 04-0644-15 TM 71 ( 610065) Voltage Sag Severity and Its Measure and Uncertainty Evaluation LIU Xuna, XIAO Xianyong, WANG Ying (College of Electrical Engineering Information Technology, Sichuan University, Chengdu 610065, Sichuan Province, China) ABSTRACT: Voltage sag is an inevitable serious problem in 0 power system. This paper gave an overview of voltage sag severity, including its evaluation index and method. With the influencing factors, damage degree, the characteristics and [1] requirements of severity in the power source-network-load [2-9] [10-12] sides, intension and evaluation measure existence conditions of sag severity were analyzed. According to the physical and mathematical properties of its different levels, the evaluation [13-14] index system of voltage sag severity from multi-angle was presented. From current related standards about equipment and process voltage sag immunity, this paper made summarization [15-19][20-24] on the thought and method of severity research based on uncertainty theory and uncertainty measure, for the purpose of pointing out worthy study in the future. [1,25-26] KEY WORDS: voltage sag; severity; evaluation method; [27-29] [26] index sy