基于光伏微网的储能变流器设计与实现

Design and realization of energy storage converter for solar photovoltaic system

储能装置作为微网的重要组成部分之一,对微网的安全稳定运行起到了重要的作用。基于太阳能光伏发电系统,设计了具有并离网切换功能的储能变流器样机。该样机采用Power PC与FPGA协同配合作为核心元件,使用PQ控制及V/f控制策略,具备并离网切换功能,能够向电网提供有功、无功支撑,稳定电网电压和频率,同时可以配合多种储能设备。使用主被动相结合的孤岛检测方法,快速准确地切换并网离网模式。样机在多种工况下,进行了并离网实验,很好地满足了设计要求,达到工业应用的标准,具有良好的推广价值。

Energy storage device is an important part of the micro-grid and plays an important role in the safe and stable operation of the micro-grid.Its core component is the battery energy storage converter.A prototype of energy storage converter was designed with the mode of grid and off-grid,based on the solar photovoltaic systems.Using power PC and FPGA as the main controller,the converter could provide support for active and reactive power and match different energy storage device.The prototype adopted a hybrid method to switch between the mode of grid and off-grid accurately.In a variety of conditions,the prototype gave a good performance.So the energy storage converter has good popularization value.