摘要
传统的电压暂降耐受特性曲线通常被描述为矩形,而试验证明一些敏感设备的电压暂降耐受特性呈现出非矩形状。因此本文提出了一种敏感设备的电压暂降耐受特性非矩形不确定区域的描述方法,建立了电压暂降耐受特性曲线不确定区域的非矩形描述形式,能够真实反映敏感设备的电压暂降耐受特性。在此基础上,对敏感设备的电压暂降耐受特性非矩形状不确定区域进行区域划分并进行定量描述,提出了基于能量损失原理的敏感设备故障概率评估方法,能够精确反映实际电网中电压暂降事件对敏感设备的影响程度,避免过度评估。通过对实际电网中电压暂降事件的分析与评估,验证了本文所提方法的正确性。
The traditional voltage sag tolerance characteristic curve is usually described as a rectangle.While,it is shown by the test that the voltage sag tolerance characteristic curve of some sensitive devices appear non⁃rectangle.Therefore,in this paper a kind of a method to describe the non⁃rectangular uncertain region of voltage sag tolerance characteristic of sensitive equipment is proposed.The non⁃rectangle description mode of the uncertain region of voltage sag tolerance characteristic curve truly reflecting the voltage sag tolerance characteristics of sensitive equipment is set up.On this basis,the non⁃rectangle uncertain region of voltage sag tolerance characteristics of sensitive equipment is divided and quantitatively described and a fault probability assessment method of sensitive equipment based on energy loss principle is proposed,which can accurately reflect the impact of voltage sag events on sensitive equipment in actual power grid and avoid over⁃estimation.The correctness of the proposed method is verified by analyzing and evaluating the voltage sag event in the actual power grid.
作者
汪伟
常乾坤
于希娟
张再驰
陈茜
汪坤
WANG Wei;CHANG Qiankun;YU Xijuan;ZHANG Zaichi;CHEN Qian;WANG Kun(State Grid Beijing Electric Power Company Electric Power Research Institute,Beijing 100000,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)
出处
《电力电容器与无功补偿》
北大核心
2020年第6期142-149,共8页
Power Capacitor & Reactive Power Compensation
基金
国家电网公司科技项目(52022317000S)。
关键词
敏感设备
电压暂降
线性化处理
故障评估
sensitive equipment
voltage sags
linearization treatment
fault assessment
作者简介
汪伟(1991-),男,工程师,主要从事定制电力技术研究工作;常乾坤(1985-),男,高级工程师,主要从事大功率电力电子变流技术和定制电力技术研究工作;于希娟(1975-),女,高级工程师,主要从事电能质量与定制电力技术研究工作;张再驰(1990-),男,工程师,主要从事电力系统及其自动化研究工作;陈茜(1991-),女,工程师,主要从事电力系统及其自动化研究工作;汪坤(1993-),男,硕士,研究方向为电能质量。
