基于准比例谐振控制的并网逆变器研究  

Research on grid-connected Inverter based on quasi-proportional resonant control

作　　者：王金玉[1] 王思航 WANG Jinyu;WANG Sihang(Daqing Petroleum Institute,School of Electrical and information engineering,Daqing,Heilongjiang 163318,China)

机构地区：[1]东北石油大学电气信息工程学院,黑龙江大庆163318

出　　处：《自动化与仪器仪表》2024年第9期87-91,共5页Automation & Instrumentation

摘　　要：传统的比例积分(Proportional Integra, PI)控制方法无法实现对正弦量无稳态误差的跟踪控制,且在电网逆变器应用中其抗干扰能力不强,导致光伏系统效率下降。因此,为了提高光伏并网逆变器的效率和性能,采用了一种基于准比例谐振(Quasi-Proportional Resonance, QPR)控制器的策略。该方法在比例谐振控制的基础上进行改进,针对三相无功电流,采用了高速模型预测控制器,同时处理谐波扰动,使并网逆变器能够快速响应电网变化。通过变量法对QPR控制参数进行设计,对逆变器采取的空间矢量脉宽调制(Space Vector Pulse Width Modulation, SVPWM)方式。最后在Matlab Simulink环境下进行仿真分析,与PI控制策略做对比,结果表明了准PR控制器在消除稳态误差和抗电网干扰方面的优越性。The traditional proportional integral(PI)control method can not realize the tracking control of sinusoidal steady-state error,and its anti-interference ability is not strong in the application of power grid inverter,which leads to the decrease of photovoltaic system efficiency.Therefore,in order to improve the efficiency and performance of grid-connected photovoltaic inverters,a strategy based on quasi-proportional resonance(PR)controller is adopted.The method is improved on the basis of proportional resonance control.For the three-phase reactive current,a high-speed model prediction controller is adopted to deal with harmonic disturbance at the same time,so that the grid-connected inverter can quickly respond to changes in the power grid..PR control parameters are designed by variable method,and SVPWM modulation is adopted for inverter.Finally,the simulation analysis is carried out in the Matlab Simulink environment,and the PI control strategy is compared.The results show that the quasi-PR controller has advantages in eliminating steady-state error and resisting grid interference.

关 键 词：光伏发电 并网逆变器 稳态误差 准PR控制 

分 类 号：TM464[电气工程—电器] TP202[自动化与计算机技术—检测技术与自动化装置]