基于分段累计积分的电压暂降严重性程度评估  

Evaluation of Severity Degree of Voltage Sag Based on Subsection Cumulative Integral

作　　者：邱知 刘晓波[1] 史华亮 QIU Zhi;LIU Xiao-bo;SHI Hua-liang(School of Electrical Engineering,Guizhou University,Guiyang 550025 China;School of Electrical Engineering,Yanshan University,Qinhuangdao 066000 China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025 [2]燕山大学电气工程学院,河北秦皇岛066000

出　　处：《自动化技术与应用》2024年第1期22-25,34,共5页Techniques of Automation and Applications

基　　金：国家自然科学基金(51867005)。

摘　　要：针对传统电压暂降评估方法中暂降波形均以矩形描述从而造成过度评估以及评估函数存在不合理的问题,提出一种基于分段累计积分的电压暂降严重性程度评估方法。对传统的电压特征量描述方法进行改进,分析传统电压暂降评估函数的局限性,针对其局限性提出一种结合常用设备电压耐受能力的权值函数法,得到电压暂降各特征量影响度函数,在这一基础上利用分段累计积分形式,结合改进电压暂降特征量描述方法对暂降事件进行评估。最后通过算例分析验证方法的科学性及客观性。Aiming at the problems that the sag waveforms in traditional voltage sag evaluation methods are described in rectangles,which cause over-evaluation and the unreasonable evaluation function,this paper proposes a method for evaluating the severity of voltage sags based on segmented cumulative integrals.The traditional description method of voltage characteristics is improved,the limitations of the traditional voltage sag evaluation function are analyzed,and a weight function method combining the voltage withstand capability of commonly used equipment is proposed for its limitations,and the characteristics of voltage sag are obtained.On this basis,it uses the piecewise cumulative integral form combined with the improved voltage sag characteristic quantity description method to evaluate the sag event.Finally,the scientificity and objectivity of the method are verified through analysis of calculation examples.

关 键 词：电压暂降 严重性程度 分段累计积分 敏感设备 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] TP18[自动化与计算机技术—控制科学与工程]