Multiple WAMS-Based Coordinated Analysis and Monitoring of Low Frequency Oscillations

doi:10.11930/j.issn.10.11930.2015.4.101

Abstract

Abstract: For low frequency oscillation spanning several control areas, local WAMS cannot identify the oscillation mode if only according to the information obtained in its own control area. A coordinated analysis and monitoring method for low frequency oscillations is proposed based on the information from several wide Area Measurement Systems (WAMS). For the power system with several WAMS control centers, one of the control centers is selected as the master WAMS, the others are treated as slave WAMS. In case that one of the WAMS detects a dangerous low frequency oscillation occurring in its control area, it will trig the coordinated analysis of low frequency oscillation based on the data from all WAMS. The slave WAMSs make frequency analysis of their own measurements respectively, and send the results to the master station. The master station synchronizes the analysis results from different WAMS and different frequency analysis methods, and then makes coherent group of the buses and calculate the relative contributions of key buses to the power oscillation. The analysis result is then returned to the slave WAMS. By this method, each control center can clearly understand its role in a wide area when low frequency oscillation involves several control centers, which will help to control the low frequency oscillation.

Key words: wide area measurement system, phasor measurement unit, low frequency oscillation, coherent grouping, frequency analysis, coordinated analysis, integrated alarm

CLC Number:

TM854

DUAN Gang, ZHAN Qingcai, YANG Dong, XIE Xiaodong, WU Jingtao, XIAO Xiaogang,WANG Jian, LIU Tao. Multiple WAMS-Based Coordinated Analysis and Monitoring of Low Frequency Oscillations[J]. Electric Power, 2015, 48(4): 101-106.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.4.101

https://www.electricpower.com.cn/EN/Y2015/V48/I4/101

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