摘要
电网相量的异地实时同步测量 ,对于电力系统状态估计、稳定控制、故障识别及继电保护等都具有重要意义。文中提出一种基于全球定位系统 (GPS)与锁相技术的电网相量实时异地同步测量方法 ,采用硬件逻辑电路产生既能自适应跟踪电网频率变化、又能实现异地同步的等间隔采样脉冲序列 ,并由它启动A/D转换器自动完成对输入模拟信号的同步采样 。
Real-time and synchronous measurement of power network phase parameters at different site is very important to system state estimation, stability control, fault identification and relay protection etc. A new measurement method based on global position system (GPS) and phase locked loop (PLL) technique is discussed. An equal phase interval sampling pulse sequence which formed by the hardware logic circuit is used to self-adaptively follow system frequency variance, and makes the different site synchronous sampling achievable. These sampling pulses start up A/D converter to complete the synchronous sampling of input analog signal automatically. It effectively solves the problem of how to measure different site power system phase parameters with high precision synchronously.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第15期40-44,共5页
Automation of Electric Power Systems
关键词
电力系统同步相量测量
异地同步采样
全球定位系统
锁相技术
synchronized phasor measurement of electric power systems
different site synchronous measurement
GPS
phase locked loop(PLL)
