两级式光伏并网逆变器的无差拍控制算法研究  

Algorithm research of deadbeat control for double-stage photovoltaic grid-connected inverter

作　　者：刘胜荣[1] 杨苹[1] 肖莹[1] 刘栋[1] 

机构地区：[1]华南理工大学电力学院,广东省绿色能源技术重点实验室,广东广州510640

出　　处：《电力系统保护与控制》2010年第8期26-29,共4页Power System Protection and Control

基　　金：广东省科技计划项目资助(2005A10505005);广东省科技计划项目资助(2007B010400080)

摘　　要：同步锁相是光伏并网逆变器一项关键的技术,直接影响到整个并网系统的性能,而传统的并网锁相技术存在锁相速度或者稳定性上的不足。在无差拍控制算法的基础上,给出一种无差拍电流控制锁相策略,并将该控制策略用于两级式单相光伏并网逆变器的控制中。仿真结果表明,在光照导致光伏电池功率波动或者电网频率变化的情况下,该控制方法能最大限度地输出能量,并使逆变器的输出电流准确、快速地跟踪电网电压,功率因数接近为1。Abstract： Genlock is a key technology of photovoltaic grid-connected inverter, which can impact the entire system performance directly, but traditional genlock technology is lack of speed or stability. On the basis of the deadbeat control algorithm, a deadbeat control genlock strategy is given in this paper, which is used in single-phase and double-stage photovoltaic grid-connectedinverter. The simulation results show that when the sunlight leads to power fluctuations or the frequency of power grid changes, the control method can transport the energy of PV cells as much as possible, and the output current can track the power system voltage fastly and accurately, the power factor is closed to 1.

关 键 词：光伏并网 逆变器 无差拍控制 太阳能发电 

分 类 号：TM464[电气工程—电器]