摘要
针对现有的数字锁相环在三相电网电压不平衡下精度降低的问题,提出了一种基于双同步坐标系解耦软件锁相环(DDSRF-SPLL)的控制策略。分析了DDSRF-SPLL的数学模型,根据DDSRF-SPLL解耦控制策略,采用硬件描述语言VHDL设计了基于FPGA的各个模块。仿真结果表明,基于FPGA的锁相环抗干扰能力强,对频率波动具有很好的适应性,锁相效果稳定、准确。
Aiming at the lower precision problem of existing phase-locked loop under the condition of unbalanced three-phase grid voltage, this paper proposed a control strategy of decoupled double synchronous coordinate system software phase-locked loop（DDSRF-SPLL）. The mathematical model of DDSRF-SPLL was analyzed. According to the decoupled control strategy of DDSRF-SPLL, various modules based on FPGA were designed by using hardware description language VHDL. The simulation results show that the phase-locked loop based on FPGA has advantages of strong anti-interference capacity, good adaptability for frequency fluctuation, stable and accurate nhase-locking.
出处
《现代建筑电气》
2015年第12期49-53,共5页
Modern Architecture Electric
关键词
双同步坐标系解耦软件锁相环
电网电压
FPGA
锁相精度
decoupled double synchronous coordinate system software phase-locked loop （ DDSRF-SPLL）
grid voltage
FPGA
phase-locked precision
作者简介
李鹏飞（1969-）,男．高级工程师。从事建筑电气设计。
刘淮涛（1985-），男。工程师，从事电子技术方面的研究。
吴平志（1990-），男，从事配电网谐波治理及无功补偿技术方面的研究。
