农村光伏逆变器的研究与应用

Research and Application of Rural Photovoltaic Inverter

以农村分布式光伏发电系统为研究对象,设计了一种低成本实用的逆变器。为了提升电网末端电能质量,采用PQ控制策略,借鉴坐标变换的思想,在旋转坐标(d-q)下建立模型,通过参数的设计实现有功无功输出的解耦控制。结合SVPWM调制技术,最后在Matlab/Simulink平台下搭建系统模型进行仿真。结果表明:所采用的控制方式能较好地实现分布式光伏电源的并网运行,抗干扰能力强,对农村光伏发电系统的发展具有一定的现实意义。

A low cost and practical inverter is designed for the rural distributed photovoltaic system.In order to improve the power quality at the end of the grid,PQ control strategy is adopted,and the concept of coordinate transformation is used to establish a model under the rotating coordinate(d-q).The decoupling control of active and reactive power output is achieved through the design of parameters,and SVPWM modulation technology is combined.Finally,a system model is built under the Matlab/Simulink platform for simulation.The results show that t he control method can realize the network operation of distributed photovoltaic power supply well,and has strong anti-interference ability,which has a certain practical significance for the development of rural photovoltaic power generation system.