准比例谐振与电压前馈控制的并网系统研究  

Research on Grid Connected System Based on Quasi Proportional Resonance and Voltage Feed-forward Control

作　　者：赵涛[1] 朱爱华 季宁一 张成 ZHAO Tao;ZHU Ai-hua;JI Ning-yi;ZHANG Cheng(Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京工程学院,自动化学院,江苏南京211167 [2]南京工程学院,电力工程学院,江苏南京211167 [3]无锡三新供电服务有限公司宜兴分公司,江苏无锡214200

出　　处：《电力电子技术》2021年第5期96-100,共5页Power Electronics

基　　金：国家自然科学基金(51707091);江苏省科研与实践创新计划(SJCX20_0717)。

摘　　要：针对传统光伏并网逆变器跟踪交流信号存在静态误差及抗干扰性较差的缺点,设计了一种电流准比例谐振(QPR)与电网电压前馈复合控制的控制策略。首先建立T型三电平并网逆变器的数学模型,然后分析控制器的原理及引入QPR控制器后系统的稳定性,并给出参数整定方法,最后通过仿真和实验证明所提策略在抑制尖峰谐振的同时,克服了传统比例积分(PI)控制和比例谐振(PR)控制的缺点,在电流无静差跟踪、提升电能质量及电网电压抗扰动方面表现出良好的效果。In view of the shortcoming of traditional photovoltaic grid connected inverter in tracking alternating current signal,such as static error and poor anti-interference,a compensation control strategy of current quasi proportional resonance(QPR)and grid voltage feed-forward composite control is designed.Firstly,the mathematical model of Ttype three-level grid connected inverter is established.Then,the principle of the controller and the stability of the system after introducing the QPR controller are analyzed,and then the parameter setting method is given.Finally,the simulation and experimental results show that the proposed strategy overcomes the shortcomings of traditional proportional integral(PI)control and proportional resonance(PR)control while suppressing peak resonance,and has good effect on current tracking without static difference,improving power quality and grid voltage anti disturbance.

关 键 词：光伏并网逆变器 三电平 无静差 

分 类 号：TM464[电气工程—电器]