基于派克变换的改进型鉴相器设计与实现  

Design and implementation of improved phase detector based on PARK transform

作　　者：邢震震 苏淑靖[1] 梁文科 梁东飞 Xing Zhenzhen;Su Shujing;Liang Wenke;Liang Dongfei(Key Laboratory of Instrumentation Science&Dynamic Measurement,Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《电子测量技术》2021年第12期18-23,共6页Electronic Measurement Technology

基　　金：国家自然科学基金(51875534)项目资助。

摘　　要：针对准确获取电网电压相位信息的锁相环中,当频率突变时引入较大相位偏差影响相位跟踪性能问题,在二阶广义积分器SOGI输出分量的基础上引入比例环节对其进行了改进,提出了一种基于改进SOGI和PARK变换的改进型数字鉴相器结构,详细说明了PARK变换的工作原理,分析了改进型锁相环的控制结构,在Simulink里对其进行建模和仿真,并且用FPGA进行数字化实现。仿真实验表明由改进型鉴相器组成的锁相环与传统锁相环相比在频率突变时相位锁定性能好,锁相精度高以及具有快速的时间响应。Aiming at the problem of phase-locked loop(PLL) which can accurately obtain the voltage phase information of power network, when the frequency changed suddenly, the large phase deviation affected the phase tracking performance, the second-order generalized integrator(SOGI) was improved by introducing a proportional component, and proposed an improved digital phase detector structure based on the improved SOGI and PARK transform, and explained the working principle of PARK transform in detail, the control structure of the improved PLL was analyzed, then it is modeled and simulated in Simulink and realized digitally with FPGA. The simulation results show that the PLL composed of the improved phase detector has better phase-locked performance, high phase-locked precision and fast time response compared with the traditional PLL.

关 键 词：PARK变换 二阶广义积分器 坐标变换 鉴相器 频率突变 锁相环 

分 类 号：TM761[电气工程—电力系统及自动化]