摘要
提出了一种基于改进锁相环 ( PLL)系统的电能质量扰动检测方法。该改进 PLL系统是一个稳定的相位反馈控制系统 ,产生的多个输出信号可用于多种电能质量扰动的检测 ,而且对于检测系统的内部参数和电力系统频率的变化是鲁棒的。在叙述了它的基本特性以及电能质量扰动检测的基本原理后 ,重点阐述了该系统对多种电能质量扰动检测的实现 ,包括谐波、电压波动、频率偏差、电压下跌、电压上升、过电压、欠电压、瞬时脉冲、低频、高频振荡和无功功率等进行检测和分析 ,并为此做了大量的计算机仿真。仿真结果证明了结论的正确性 ,同时也表明 。
A novel detection method of power quality disturbance based on an improved phase-located loop (PLL) system is brought forward in this paper. The PLL system is a stable phase feedback control system with many useful outputs, and it is robust to its inner parameters and small change of input's basic frequency. After describing basic characteristics of the system and its detection principle, the realizations and effects of detection of many kinds of power quality disturbances, such as harmonics, voltage fluctuations, frequency deviation, sags, swells, over-voltage, under-voltage, transient pulse, low-frequency oscillation, high-frequency oscillation, and reactive power, are analyzed in emphases. The simulation results prove the conclusion above, and also show that the detection method is a real time one.
出处
《电力系统及其自动化学报》
CSCD
2004年第5期20-25,46,共7页
Proceedings of the CSU-EPSA
基金
全国高等学校优秀青年教师教学科研奖励计划资助项目
关键词
电能质量
扰动检测
改进的锁相环系统
鲁棒
计算机仿真
power quality
disturbance detection
improved PLL system
robust
computer simulations
