基于暂态响应时间分析与暂稳态模式识别的锁相环参数自适应方法

Phase-locked loop parameter adaptive method based on transient response time analysis and transient steady-state pattern recognition

锁相环的设计对保障交流网络中设备安全运行有着重要意义,锁相环实现方法与参数设计对锁相环的响应时间、抗扰能力等控制特性起到重要影响。本文通过结合小信号频域模型与大信号状态空间模型,分析同步坐标系锁相环的暂稳态响应特性,得出各参数设计对于锁相环控制特性的影响;在理论分析基础上,提出了基于响应时间与暂稳态模式识别的锁相环参数自适应框架。仿真与实验结果验证了所提出的参数自适应方法可以通过实现参数动态调节,达到对锁相环暂态快速响应与稳态抗扰的设计要求。

The design of phase-locked loops is of great importance to ensure the safety of equipment in AC power grid operation.In this paper,the transient and steady-state response characteristics of the synchronous reference frame are studied.Based on response time analysis and transient steady-state pattern recognition,an adaptive framework for phase-locked loop parameters is proposed.The parameters are tuned dynamically to make the phase-locked loop to meet the design requirements of transient fast response and steady-state immunity,and the performance is verified by simulation and experiments.