| 引用本文: | 韩润,滕予非,谢剑,王晓茹,车玉龙.基于改进STD法的电力系统低频振荡辨识[J].电力自动化设备,2019,39(3): |
| HAN Run,TENG Yufei,XIE Jian,WANG Xiaoru,CHE Yulong.Identification of low-frequency oscillation in power system based on improved STD algorithm[J].Electric Power Automation Equipment,2019,39(3): |
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| 摘要: |
| 介绍稀疏时域(STD)法的基本理论并对其进行改进，给出基于该方法进行低频振荡模式参数辨识的具体实施步骤。16机系统时域仿真数据和某实际电网相量测量单元(PMU)实测数据验证了改进STD法的有效性和实用性。改进STD法与总体最小二乘-旋转不变技术(TLS-ESPRIT)及Ibrahim时域(ITD)算法辨识结果的对比表明，改进STD法在准确性和抗噪性方面均表现较好；与含低通滤波器的多通道ITD算法相对比，改进STD法无需对输入信号进行低通滤波即可实现准确辨识。 |
| 关键词: 改进STD法 自由响应 低频振荡辨识 抗噪性 |
| DOI：10.16081/j.issn.1006-6047.2019.03.009 |
| 分类号:TM712 |
| 基金项目:四川省重点研发计划项目(2017GZ0054) |
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| Identification of low-frequency oscillation in power system based on improved STD algorithm |
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HAN Run1, TENG Yufei2, XIE Jian1, WANG Xiaoru1, CHE Yulong1
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1.School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;2.State Grid Sichuan Electric Power Research Institute, Chengdu 610072, China
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| Abstract: |
| The basic theory of STD(Spare Time Domain) algorithm is introduced, and the algorithm is improved, based on which, the concrete implementation steps of parameter identification for low-frequency oscillation are given. The validity and practicality of the improved STD algorithm are verified by the time domain simulation data of a 16-generator system and the PMU(Phase Measurement Unit) data of a practical power grid. The comparison of identification results among the improved STD algorithm, the TLS-ESPRIT(Total Least Square-Estimation of Signal Parameters via Rotation Invariance Techniques) and ITD(Ibrahim Time Domain) algorithm shows that the improved STD algorithm performs well in the aspects of accuracy and anti-noise performance, and it can realize accurate identification without low-pass filtering of the input signal compared with the multi-channel ITD algorithm with low-pass filter. |
| Key words: improved STD algorithm free response low-frequency oscillation identification anti-noise |
