摘要
分布式发电系统出力具有波动性和间歇性,且含有大量的电力电子开关器件,并网后会对配电网的电能质量产生一定影响。建立了光伏发电系统和风力发电系统数学模型,并利用IEEE30节点标准系统搭建了含分布式电源的配电网谐波模型进行仿真分析。结果表明:含分布式电源的配电网节点电压谐波特性与电压等级有关,电压等级越高其总谐波畸变率越小;支路电流的谐波特性与支路电流的大小有关,电流越大其总谐波畸变率越小。仿真结果为分布式电源并网、配电网规划以及配电网谐波治理提供了理论参考。
Since the output of distributed generation system is volatile and intermittent,and contains a large number of power electronic switching devices,the power quality of distribution network will be affected after grid connection.The mathematical models of photovoltaic power generation system and wind power generation system are established,and the harmonic model of distribution net-work including DG is constructed with IEEE30-node standard system for simulation analysis.The results show that the voltage harmon-ic characteristics of distribution network nodes with DG are related to the voltage level.The higher the voltage level is,the lower the to-tal harmonic distortion(THD)rate is.The harmonic characteristics of the branch current are related to the magnitude of the branch current,and the higher the current,the smaller the total harmonic distortion rate.The simulation results provide theoretical reference for grid connection of distributed power supply,distribution network planning and harmonic control of distribution network.
作者
王佼
WANG Jiao(Baoding Power Supply Branch of State Grid Hebei Electric Power Co.,Ltd.,Baoding,Hebei 071000,China)
出处
《山西电力》
2024年第5期10-13,共4页
Shanxi Electric Power
关键词
配电网
分布式电源
谐波特性
总谐波畸变率
distribution network
distributed power supply
harmonic characteristics
total harmonic distortion(THD)rate
