中国电机工程学报Issue(23)：6075-6082,8.DOI:10.13334/j.0258-8013.pcsee.2015.23.014
基于时频信息的动态同步相量测量算法
Time-Frequency Information-based Dynamic Phasor Estimator
摘要
Abstract
The dynamic phasor estimation algorithm based on the frequency-domain information obtains short delay but heavy computational burden, while that based on the time-domain information obtains light computational burden with long delay. The algorithm for dynamic phasor estimation based on the time-frequency information was proposed to balance the tradeoff of time delay and computational burden. Firstly, the Discrete Fourier Transform (DFT) based phasor estimations from different data windows and at different frequency bins were calculated with Taylor-series phasor model. Then, the time-frequency information of the DFT based phasor estimations were analyzed in detail, and modified phasor estimation was provided. Finally, phasor estimation at the report time was obtained by phase shift operation. Test results of both ideal signals and PSCAD/EMTDC generated signals shows that the proposed algorithm can provide accurate phasor estimations under conditions of power oscillations and frequency deviations. The time delay and the computational burden can be optimized by selecting the number of data window and frequency bin to meet the requirement of practical application.关键词
时频信息/动态相量测量/泰勒模型/低频振荡/频率偏移/运算量优化Key words
time-frequency information/dynamic phasor estimation/Taylor model/low frequency oscillation/frequency deviation/computation optimization分类
信息技术与安全科学引用本文复制引用
符玲,韩文朕,麦瑞坤,何正友..基于时频信息的动态同步相量测量算法[J].中国电机工程学报,2015,(23):6075-6082,8.基金项目
国家自然科学青年基金项目(51307146，51407150)。 Project Supported by National Natural Science Fund for Young Scholars (51307146,51407150) （51307146，51407150）
