一种有滤波功能的微网单相光伏系统

针对微网中非线性负载和间歇性微源引起电能质量较差的现状,提出了一种有滤波功能的微网单相光伏系统。引入电网电压前馈控制优化电气模型,消除系统扰动,通过基于最小二乘法的自适应谐波检测算法进行快速谐波检测。该系统不仅能够提供有功电能,而且能抵消负载注入的谐波电流,有效提高了并网节点的电能质量水平。搭建了仿真模型,并研制了光伏并网样机,验证了该系统及其控制方法的正确性和有效性,同时这种单相光伏对电能质量主动控制的思路也适用于微网中其他逆变型微源。

A Micro-grid Single-phase Photovoltaic System with Filtering Function

For the present situation of poor performance of the power quality in micro-gird caused by nonlinear loads and intermittent micro sources,a micro-grid single-phase photovoltaic system with filtering function is proposed.The introduction of network voltage feedforward control can optimize electrical model and effectively restrain system disturbance.The adaptive harmonic detection method based on least squares algorithm can detect the harmonics rapidly.The system provides active energy and suppresses the harm...