动态相量估计算法特征分析及比较.pdfVIP

第45 卷 第3 期 电力系统保护与控制 Vol. 45 No. 3 2017 年2 月1 日 Power System Protection and Control Feb. 1, 2017 DOI: 10.7667/PSPC160160 动态相量估计算法特征分析及比较 卢 达，林繁涛，赵 莎，白静芬 (中国电力科学研究院，北京 100192) 摘要：电力系统的实际应用对相量估计算法的动态性能有很高要求。首先，分析了动态向量估计算法应具有基频 附近频率响应幅值平坦的频域特征，和采样时间窗尽可能短的时域特征。其次，提出了一种带通滤波的四分之三 周期最小二乘相量估计算法，这种算法符合上述时域和频域特征。第三，对提出算法的计算复杂度进行了定量计 算，对提出的算法在各种类型的动态信号下的估计效果进行了仿真。与通用的离散傅里叶相量估计算法、估计效 果较好的泰勒-傅里叶变换向量估计算法比较后说明，所提出的算法是一种能够在计算复杂度和相量动态效果间取 得较好平衡的动态相量估计算法。 关键词：相量估计；最小二乘法；动态性能；傅里叶变换；泰勒傅里叶变换 Analysis and comparison of dynamic phasor estimation algorithms LU Da, LIN Fantao, ZHAO Sha, BAI Jingfen (China Electric Power Research Institute, Beijing 100192, China) Abstract: The dynamic performance of a phasor estimation algorithm is highly expected by electric power applications. Firstly, the paper analyzes the frequency domain feature and time domain feature which a good dynamic phasor estimation algorithm should have. The frequency domain feature is that the frequency response of the algorithm near the fundamental frequency should be flat and the time domain feature is that the sample window should be as short as possible. Secondly, this paper proposes a three-quarter fundamental period least squares with band-pass filter (TQLSBF) phasor estimation algorithm which has the features mentioned above. Thirdly, the computational complexity of the proposed algorithm is analyzed and the estimation performance in various dynamic situation is