电力电容器串联电抗器及其补偿容量的算法  

An algorithm of reactors connected in series by power capacitors andcompensation capacity

作　　者：胡天祥 黎军华 HU Tianxiang;LI Junhua(Leshan Yi Lade Power Grid Automation Co.,LTD.,Leshan Sichuan 614000,China)

机构地区：[1]乐山一拉得电网自动化有限公司,四川乐山614000

出　　处：《宁夏电力》2021年第3期25-29,共5页Ningxia Electric Power

基　　金：新型高压.滤波补偿装置(ZL201220301013.9)。

摘　　要：由于电力电子元件、变频设备、非线性负荷的存在,变压器结构不对称或工艺等问题,导致出现谐波电压或者谐波电流,在无功功率补偿装置中,谐波对电力电容器的影响主要表现在增加电容器损耗、放大谐波电流、引起电容器过热和降低电容器寿命等方面。为减少或避免高次谐波对电容器的危害,应从电能质量和抑制谐波装置上采取措施。本文就低压并联电容器装置串联电抗器及补偿容量进行分析,结合额定参数及现场数据,推导出具体公式,通过公式可计算补偿单元的额定无功输出和实际无功输出容量,可作为补偿装置设计、实际工程应用的参考。Power electronic components,frequency converters and nonlinear loads as well as asymmetric transformer structure and technology result in harmonic voltage or harmonic current.In reactive power compensation devices,harmonic affects power capacitors by increasing capacitor loss,harmonic current and leading to capacitor overheat and reducing service life of capacitors.In order to reduce or avoid the harm of high-order harmonics to capacitors,measures should be taken on power quality and harmonic suppression devices.In this paper,series reactors of installation of low-voltage shunt capacitors and compensation capacity were analyzed,and a formula was derived on the basis of rated parameters and field data.The rated reactive output capacity and actual reactive output capacity of the compensation unit were figured out as a reference for compensation device design and engineering application.

关 键 词：无功功率 补偿容量 电容器 电抗器 电抗率 谐波 

分 类 号：TM744[电气工程—电力系统及自动化]