三相光伏并网逆变器控制及其反孤岛效应  

Research on the whole control schemes and anti-islanding protection for the three-phase grid-connected photovoltaic inverter

作　　者：许颇[1] 张崇巍[1] 张兴[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2006年第9期1139-1143,共5页Journal of Hefei University of Technology：Natural Science

摘　　要：文章论述了三相光伏并网逆变器的控制系统设计及反孤岛效应策略。系统通过双闭环控制实现了并网逆变器的单位功率因数运行;对电流内环采用固定开关频率PWM控制方法,有利于滤波的设计和控制算法的实现;通过对电流内环和电压外环的典型系统设计,满足了电流跟踪的快速性要求和直流电压的抗扰性要求,结果证明了方案的合理性。This paper deals with the whole control system and anti-islanding protection strategy of the three-phase grid-connected photovoltaic inverter. The system realizes the unity power factor running through the double closed loop control. Current control with the fixed switching frequency is adopted, which is favorable to filter design and realization of the control algorithm. The inner current loop and the outer voltage loop are designed based on typical systems respectively so that rapid current tracking and anti-disturbance of the voltage are achieved. The controllability of anti-islanding protection based on the Sandia frequency shift is demonstrated. A prototype 30 kW grid-connected photovoltaic inverter is designed, and the experimental results show its feasibility.

关 键 词：光伏 并网 闭环控制 Sandia频移 反孤岛效应 

分 类 号：TM64[电气工程—电力系统及自动化]