摘要
本文提出一种精确测量电力系统绝对正序相角和稳态频率的计算方法,首先利用DFT算法得到相对于1PPS-GPS的绝对正序相角,再从绝对相角可直接推算出稳态频率的偏移量Δf。该方法不仅可得到整个电力系统的绝对相角和高精度的频率测量,而且能减少或消除由于晶振误差和电子元器件不一致性造成的时钟误差。试验结果证实了该方法的正确性。
A precise calculation method of absolute phase angles and stable power frequency is presented in this paper.Firstly,the absolute phase angle of positive sequence voltages/currents relative to 1PPS(1 Pulse per Second) from GPS is calculated by using Discrete Fourier Transforms(DFT).Then a most direct precise measurement of power frequency excursion ?f is proposed by using the absolute phase angles every 1PPS directly.The method here not only obtains high accurate frequency and absolute phase angles of entire...
出处
《继电器》
CSCD
北大核心
2007年第S1期268-271,共4页
Relay
关键词
频率测量
绝对正序相角
PMU
GPS
Frequency Measurement
Absolute Positive Sequence Phase Angle
PMU
GPS
