【摘要】 针对复杂的锁相环控制器参数设计问题,提出了一种简单实用的控制器参数设计方法。在分析三相锁相环原理的基础上,对单同步坐标系软件锁相环控制结构进行微偏线性化处理,求出其控制器等效传递函数为典型II型系统,按照典型II型系统参数设计原则推导出连续系统下的PI参数设计公式。通过对连续系统控制器离散化处理,推导出一套简单实用的数字系统三相软件锁相环控制器参数设计公式。建模仿真结果表明,锁相环系统动静态性能优越,验证了由该公式设计PI参数的合理性与实用性。更多还原

【Abstract】 Phase- locked loop( PLL) is essential for detecting the grid phase angle in grid converters,its speed and accuracy directly affects the performance of synchronous control system relying on PLLs. Some basic principles of the single synchronous reference frame phase- locked loop( PLL) were firstly presented and analyzed. Partial differential is employed for analyzing the control scheme of the proposed PLL. As the transfer function of controller is a typical II system,parameter was designed in a typical method and its digital implementation was discussed. The performance of the proposed designing method was verified by experiments.更多还原