跟踪锁相技术在电力电量交流采样中的应用  

Application of pll tracking technology in electric energy AC sampling

作　　者：李正军[1] 

机构地区：[1]山东工业大学

出　　处：《电力系统及其自动化学报》1998年第1期32-38,共7页Proceedings of the CSU-EPSA

摘　　要：在电力电量测量中，目前多以微处理器为核心，根据交流采样原理设计，对电力线上的电流、电压进行瞬时采样，由电工基本原理公式进行计算，求出电力线上各种电量的数值并进行显示和记录，同时可以经过ＲＳ－２３２Ｃ通讯口远传，实现电量的数据测量。本文从一电量数据采集仪的工作原理、频率测量与锁相电路、采样电路几个方面对跟踪锁相技术在电量交流采样中的应用加以分析。Microprocessor is often used as the core of electric energy measuring at present.The instrument is designed according to AC sampling principle.It samples the curent and voltage on the power line instantaneously,then calculates according to electrical engineering basic principles and formulas,so that it obtains the value of all kinds of electric energy on the power line.After that it displays and records them and makes longdistant seeding by using RS-232 interface.In this paper we describe the date acquisition instrument's work principle,hardware designing,frequency measuring and pll circuit,and sampling circuit,and sampling circuit,and Sampling Circuit to analyse the application of pll tracking technology in electric energy AC sampling.

关 键 词：跟踪锁相 交流采样 电量 微机 电力电量测量 

分 类 号：TM930.9[电气工程—电力电子与电力传动] TM930.12