摘要
为了合理、精准地衡量电压暂降事件对用电设备产生的影响,需对电压暂降严重性进行评估.针对现有评估方法中敏感设备电压耐受曲线的分布存在突变问题,提出一种基于敏感设备电压耐受改进曲线的电压暂降严重性评估方法.首先,基于最小二乘的方法,结合设备电压耐受能力及电压暂降的规律,拟合出具有连续、单调特性的敏感设备电压耐受改进曲线.然后,根据电压暂降严重程度函数与设备电压耐受能力间的关系,建立基于敏感设备电压耐受改进曲线的电压暂降严重性函数模型.最后,基于土耳其Thrace一家纺织厂变电站发生的电压暂降事件数据进行实例验证.验证结果表明改进后的严重性函数的评估结果更合理、更符合客观实际.
To measure the influence of voltage sag events on electrical equipment reasonably and accurately,the severity index of the voltage sag needs to be evaluated.Aiming at the abrupt problem of voltage tolerance curve distribution of sensitive equipment in the existing evaluation methods,a method for evaluating the severity of voltage sag based on the improved voltage tolerance curve of sensitive equipment was proposed.First,combined with the equipment voltage tolerance capability and the law of voltage sags,the improved curve of sensitive equipment voltage tolerance whose characteristic was continuous and monotonic was fitted based on the least square method.Then,according to the relationship between the voltage sag severity function and the equipment voltage tolerance capability,a voltage sag severity function model based on the improved voltage tolerance curve of sensitive equipment was established.Finally,an example was verified based on the voltage sag event data that occurred in a textile factory substation in Thrace,Turkey.The verification result showed that the evaluation result of the improved severity function was more reasonable and more in line with objective reality.
作者
崔其莲
张艳
程志友
CUI Qilian;ZHANG Yan;CHENG Zhiyou(School of Electronics and Information Engineering,Anhui University,Hefei 230601,China;Power Quality Engineering Research Center,Ministry of Education,Anhui University,Hefei 230601,China)
出处
《安徽大学学报（自然科学版）》
CAS
北大核心
2021年第4期47-54,共8页
Journal of Anhui University(Natural Science Edition)
基金
国家自然科学基金资助项目(61672032)
安徽省科技重大专项(18030901018)。
关键词
电压暂降
严重性指标
最小二乘法
电压耐受曲线
暂降评估
voltage sag
severity index
least square method
voltage tolerance curves
voltage sag assessment
