摘要
在分布式电源并网系统中,通过获取电网侧的瞬时相位信息,使逆变器输出与电网保持同频、同相。文章分析了单同步坐标系软件锁相环算法和双二阶广义积分器锁相环算法的性能特点,根据优势互补的方法,通过检测电路检测三相电路的状态,正确地对锁相环进行切换,以快速精确的检测出正序电压和相位,保证系统中的逆变器正常工作。同时通过利用单纯形法对其锁相环的控制器参数进行优化。研究结果表明,根据电网侧的工作状态,合理地切换锁相环的工作模式,可以快速精确地追踪电网相位和频率信息。
Distributed power system obtains the instantaneous phase information of the grid, and controls its inverter output matching the frequency and phase of the grid. The characteristics of SSRF SPLL and DSOGI- SPLL performance are analyzed in this paper. According to the complementary advantages principle, a proper phase-locked loop（PLL） is switched for quick and accurate detection of the positive sequence voltage and phase to implement the normal working of converter based on detected three-phase circuit state. At the same time, the simplex method is used to optimize the PLL controller parameters. The research results show that reasonable switch of the PLL operation mode can track grid phase and frequency information quickly and accurately according to the working state of the grid.
出处
《可再生能源》
CAS
北大核心
2015年第5期725-730,共6页
Renewable Energy Resources
