并联Buck-Boost型多电池光伏并网逆变器的研究

Research on the parallel Buck-Boost photovoltaic grid-connected inverter with multiple batteries

随着太阳能、风能等新能源技术的发展,分布式发电技术已经广泛应用在电力系统之中,成为一种新型的发电方式。分布式发电技术具有清洁、环保、高效等特性,其并网技术成为研究的热点问题。针对太阳能光伏发电技术,设计了一套并联的Buck-Boost型多电池光伏并网逆变器,由太阳能光伏电池板、并联的Buck-Boost斩波电路、逆变电路等部分组成,并对光伏发电最大功率跟踪MPPT控制方法和逆变器并网控制策略进行研究,分别选取了电导增量法的MPPT控制方法和双闭环并网控制方式。通过在Matlab/Simulink中搭建系统仿真模型,仿真结果证明了该系统的功能。

With the development of alternative energy technologies such as solar power,wind power,etc.,the distributed generation technology,which is clean,green and efficient,has been widely used in power systems,and its grid connecting technology has become a research focus. In this study,based on solar power photovoltaic technology,we designed a parallel Buck- Boost photovoltaic grid- connected inverter with multiple batteries,which consisted of solar power photovoltaic batteries,parallel Buck- Boost chopper circuit,inverter circuit,etc. Then we analyzed the control method of the maximum power point tracking( MPPT) and the grid- connected control strategy of the inverter,and selected the conductance increment method for MPPT and double closed- loop control method for grid- connected control. By building simulation model in Matlab / Simulink,we verified the function of the system.