电力系统保护与控制2016，Vol.44Issue(14)：142-146,5.DOI:10.7667/PSPC151434
光伏电站多逆变器并网系统输出谐波研究
Study on output harmonic of multi-inverter grid-connected in photovoltaic plant
张战彬 1翟红霞 1徐华博 1赵辉 1赵丽霞2
作者信息
- 1. 国网河北省电力公司邢台供电分公司，河北 邢台 054001
- 2. 燕山大学电气工程学院，河北 秦皇岛 066004
- 折叠
摘要
Abstract
The harmonic problem caused by the multi-inverters grid-connected to the power grid in point of common coupling is studied. Small-signal circuit model for single inverter and multi-inverters is established. The equivalent impedance of transfer function of the inverter, PWM switching harmonic source and power grid are derived. The equivalent output impedance of amplitude-frequency characteristic and phase frequency characteristics of the inverter and PWM switching harmonic source are analyzed by Bode diagram. The harmonic of 35 kV photovoltaic power station multi-inverters grid-connected system under the different conditions is analyzed in Matlab/Simulink. The simulation results show that if the grid-connected inverters are more, the current harmonic distortion rate of PCC will be greater. It mainly contains low-order harmonic but less high harmonic. The effectiveness of small-signal circuit model is verified.关键词
光伏电站/逆变器并网/小信号模型/谐波分析/频域分析Key words
photovoltaic plant/inverter grid-connected/small signal model/harmonic analysis/frequency domain analysis引用本文复制引用
张战彬,翟红霞,徐华博,赵辉,赵丽霞..光伏电站多逆变器并网系统输出谐波研究[J].电力系统保护与控制,2016,44(14):142-146,5.
