电测与仪表2018，Vol.55Issue(5)：63-69,7.
同相牵引供电系统中无锁相环的电流检测方法研究
Single phase current detection method research in cophase traction power supply system
彭超敏 1粟时平 1张丰鸣 1陈浩 1施灵卫1
作者信息
- 1. 长沙理工大学电力系统安全运行与控制湖南省高校重点实验室,长沙410004
- 折叠
摘要
Abstract
In order to compensate the fundamental wave reactive current and harmonic current accurately in the phase railway load side for making the power factor of three-phase power supply to 1 and achieving the balance of three phase system,the traditional way is to use the characteristics of trigonometric function through the adder,multiplier,integrator and phase-locked loop to realize the fundamental active current and reactive current detection.The methods can avoid a lot of matrix and the inverse matrix calculations,making the low cost of whole operation circuit,which is simple and easy to implement.while there is the single-phase delay of PLL and and low pass filter,thus the lock voltage phase will deviation at the beginning and having a impact on the current dynamic performance of early detection.Based on the above problem,considering the average filter characteristic of rapid detection performance,this paper presents an improved method of detecting the fundamental active current and fundamental reactive current of the load under the Scott balance transformer power supply system,using the average filter with good dynamic response speed to replace the traditional low-pass filter and single-phase PLL to lock in the phase of the voltage and frequency measured.The analysis of theory and simulation verify that the method is more accurate and superior than the effects of traditional ways.关键词
相位偏差/均值滤波器/单相锁相环/Scott平衡变压器/同相牵引供电Key words
phase deviation/the mean filter/single phase locked loop/scott balanced transfer/cophase traction power supply分类
信息技术与安全科学引用本文复制引用
彭超敏,粟时平,张丰鸣,陈浩,施灵卫..同相牵引供电系统中无锁相环的电流检测方法研究[J].电测与仪表,2018,55(5):63-69,7.
