基于FPGA的光伏并网复合控制  

Photovoltaic grid-connection compound control based on FPGA

作　　者：王迷迷[1] 郑英[1] 操凤萍[1] 张立珍[1] 

机构地区：[1]东南大学成贤学院,江苏南京210088

出　　处：《电源技术》2016年第8期1665-1668,共4页Chinese Journal of Power Sources

摘　　要：光伏并网系统本质是跟随光伏功率和电网电压的可变交流电源,要求稳定性好、动态性能高。FPGA并行处理、灵活定制的特点能满足光伏并网控制器对高速度,可靠性高的要求。对基于FPGA光伏并网系统结构和控制策略进行了分析,对FPGA控制核心的实现要点进行了详细阐述,并研制了一台2 k W的光伏并网逆变器样机。并网测试表明,基于FPGA的并网电流反馈电网电压前馈复合控制方法,可以实现并网电流与电网电压同频同相,且并网电能质量满足光伏系统并网的国家标准要求。Actually, photovoltaic grid system is a variable AC power following photovoltaic power and grid voltage, requiring good stability and high dynamic performance. The characteristics of parallel processing and flexible customization of FPGA can satisfy the requirements of photovoltaic grid-connected controller for high speed and reliability. PV grid-connected system structure and control strategy were analyzed, then key points of PV grid-connected control core based on FPGA were set forth. A 2 kW PV grid-connected inverter prototype was developed. Tests show that the feed-forward compound control for power grid current feedback grid voltage based on FPGA could keep the same frequency and phase of the inverter output current with the grid voltage, and the power quality meets the national standard requirements.

关 键 词：复合控制 SPWM合成 光伏并网 相位跟踪 

分 类 号：TM615[电气工程—电力系统及自动化]