基于CZT算法的锁相环技术

he phase-locked synchronization technology is an important factor to protect the power supply, and also is a common technique for many electrical devices. The quality of the phase-locked loop (PLL) affects directly the performance of the power electronic devices.This paper presents phase-locked synchronization technology basis on CZT algorithm. It introduces the basic principles of CZT algorithm.And through comparing with FFT algorithms, it proves the CZT algorithm that can obtain high accuracy signal parameters. At the same time, through theoretical analysis and simulation, and comparing with the simulation of the mathematic phase model of the single-phase PLL, it illustrates the application of CZT algorithm can track the signal frequency and phase within a short period of time, and achieve a good phase-locked technology.