【摘要】 针对电网电压出现频率偏移时,传统锁相环精度差、响应速度慢等问题,提出一种基于双二阶广义积分器正交信号发生器的新型锁相环,分析了新型锁相环工作原理,并建立基于新型锁相环的三相三电平电压型SVPWM整流器模型.通过MATLAB/Simulink对模型进行分析验证,结果表明:该新型锁相环能够在频率突变情况下实现频率跟踪,实现有功、无功分量独立控制以及较高功率因数运行.更多还原

【Abstract】 Conventional phase-locked loop(PLL) is characterized by low detection accuracy and response speed under frequency offset of grid voltage conditions. A novel digital PLL based on Doubled Second Order Generalized Integrator-Quadrature Signal Generator(SOGI-QSG) is proposed with its working principles analyzed,the model of three-phase three level voltage SVPWM rectifier built, and the framework of control strategy given.Besides, simulation results show that the new PLL has better precision and adaption under frequency mutation, and it can realize active, reactive power respectively control with high power factor.更多还原