摘要
谐波电流注入电网会在系统中感应出谐波阻抗,获取谐波阻抗是一世界性难题,本文针对上海地区0.4 k V配电网的特点,采用了傅里叶级数展开法及叠加定理论证了电能质量分析仪的现场实测结果,尝试分析基于配电网的各种运行方式下及无功补偿电容器各种投切方式下的三相谐波正序、负序、零序阻抗,并由谐波序阻抗进一步分析谐波对配电网电能质量的污染程度。
Injection of harmonic current system and the acquisition of harmonic into power grid will induce harmonic impedance in the power impedance is a worldwide problem. In this paper, the site experimental result of power quality analyzer,according to the feature of 0.4 kV distribution grid in Shanghai ,is demonstrated by the use of Fouries sequence,negative sequence and zero sequence series expansion and superposition theorem. The positive impedance of three-phase harmonics based on various operation modes of distribution grid and various switching modes of reactive power compensation cap- acitor are analyzed. And the pollution level of harmonic to the power quality of distribution grid is ana- lyzed further by the harmonic sequence impedance.
出处
《电力电容器与无功补偿》
北大核心
2016年第6期70-75,共6页
Power Capacitor & Reactive Power Compensation
关键词
谐波序阻抗
励磁阻抗
无功补偿
容抗
harmonic sequence impedance
exciting impedance
reactive power compensation
cap- acitive impedance
