摘要
同步逆变器能够实现大规模分布式电源友好地接入微电网,但在实际运行中,微电网逆变器出口电压质量易受非线性负荷的影响。文章在同步逆变技术控制的基础上,提出了加入分频抑制控制策略来抑制微电网中的电压谐波。首先,建立微源逆变器输出电压模型,分析孤岛运行微电网中谐波产生原因及电压质量恶化机理,进而提出使用谐波分频抑制算法抑制电压谐波;其次,搭建同步逆变器仿真模型,并结合谐波抑制方法提出将分频抑制与同步逆变器相结合的谐波抑制控制策略,既解决大量微源接入导致微电网运行不稳定的问题,也解决了非线性负荷接入引起的谐波畸变问题。文章通过仿真验证了所提控制策略的正确性和有效性。
Synchronous inverter can realize large-scale distributed power supply friendly access to micro-grid,but the output voltage quality of micro-grid inverter is vulnerable to nonlinear load in actual operation.This paper proposes to use the frequency division suppression control strategy suppresses voltage harmonics based on synchronous inverter technology control in the micro-grid.Firstly,the output voltage model of the micro-source inverter is established,and the causes of harmonic generation and the mechanism of voltage quality deterioration in the micro-grid running in islands are analyzed.Then the algorithm of harmonic frequency division suppression is proposed to suppress voltage harmonics.Secondly,the synchronous inverter simulation model is built,and combined with the harmonic suppression method.A harmonic suppression control strategy combining frequency division suppression and synchronous inverter is proposed.The control strategy solves that a large number of micro-sources are connected to the micro-grid aroused the problem of unstable operation.And also solves the problem of harmonic distortion caused by nonlinear load access.Finally,the correctness and effectiveness of the proposed control strategy are verified by simulation analysis.
作者
董雁楠
韩子娇
穆昱壮
董鹤楠
马少华
蔡志远
Dong Yannan;Han Zijiao;Mu Yuzhuang;Dong Henan;Ma Shaohua;Cai Zhiyuan(Shenyang University of Technology,Shenyang 110870,China;State Grid Liaoning Power Co.,Ltd.,Shenyang 110006,China;Sanya Power Supply Company,Sanya 572000,China;Liaoning Electric Power Company Electric Power Research Institute,Shenyang 110006,China)
出处
《可再生能源》
CAS
北大核心
2020年第12期1670-1678,共9页
Renewable Energy Resources
基金
国网辽宁省电力有限公司科技攻关项目(YF2019-01)。
关键词
微电网
电压质量
同步逆变器
分频抑制
谐波畸变
micro-grid
voltage quality
synchronous inverter
frequency division suppression
harmonic distortion
