• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2016, Vol. 37 ›› Issue (10): 108-.doi: 10.3969/j.issn.1000-7229.2016.10.015

• 输配电技术 • 上一篇    下一篇

基于起振波形数据与相干谱的低频振荡类型识别方法

王丽馨,蔡国伟,杨德友,孙正龙   

  1. 东北电力大学电气工程学院,吉林省吉林市 132012
  • 出版日期:2016-10-01
  • 作者简介:王丽馨(1991),女,硕士研究生,主要研究方向为电力系统稳定分析与控制; 蔡国伟(1968),男,教授,主要从事电力系统运行分析方面的教学与科研工作; 杨德友(1983),男,副教授,研究方向为电力系统稳定性分析及大规模可再生能源并网; 孙正龙(1988),男,博士研究生,主要从事电力系统频率稳定方面的研究工作。
  • 基金资助:
    国家自然科学基金项目(51507028)

Low Frequency Oscillation Type Discrimination Based on Initial Oscillation Waveform Data and Coherence Method

WANG Lixin, CAI Guowei, YANG Deyou, SUN Zhenglong   

  1. School of Electrical Engineering, Northeast Dianli University, Jilin 132012, Jilin Province, China
  • Online:2016-10-01
  • Supported by:
    Project supported by National Natural Science Foundation of China(51507028)

摘要: 根据激励的不同,电力系统有功功率低频振荡主要表现为强迫功率振荡和负阻尼振荡。2种振荡表现形式相似,但控制方法不同。在深入分析电力系统有功功率振荡解析表达式的基础上,对2种振荡的外在表征及区别进行总结和概括,进而提出了基于相干谱法的低频振荡类型识别方法。该方法首先需要从安装在不同发电机组的广域相量测量系统(wide area measurement system,WAMS)中获取2组含有噪声的振荡初期数据,利用相干谱理论计算2组数据的幅值平方相干函数值,通过对幅值平方相干函数值的量化比较实现低频振荡类型的识别。4机2区域系统仿真计算与分析,验证了所提识别方法的可行性及有效性。

关键词: 电力系统, 低频振荡, 强迫功率振荡, 负阻尼振荡, 相干谱法

Abstract: According to the different excitations, the main low frequency oscillation of power system is forced oscillation and negative damping oscillation. The two kinds of oscillations are similar in form, but the control methods are quite different. We summarize the external characteristic and distinction of the two kinds of oscillations based on the deep analysis on the analytical expression of active power oscillation of power system, then put forward a oscillation type identification method on the basis of coherence method. Firstly, this method obtains two sets of initial data of oscillation which contains the noise through the wide area measurement system (WAMS) installed on the different generators, then calculates the magnitude squared coherence of the two sets of data based on coherence method. So we can identify the oscillation type by the comparison of the magnitude squared coherence. The simulation calculation and analysis of four-machine, two-area system verify the feasibility and effectiveness of the proposed identification methods.

Key words: power system, low frequency oscillation, forced power oscillation, negative damping oscillation, coherence method

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