A New Method for Visual Real-Time Monitoring of Low Frequency Oscillation

Bo-Jian Wen¹, Shi-Ming Li¹, Chong-Wen Zhou², Jun Luo², Fang-Zong Wang²

¹Guangdong Power Grid Co., Ltd., Power Dispatching Control Center, Guangzhou, China.
²College of Electrical Engineering and Renewable Energy, China Three Gorges University, Yichang, China.

DOI: 10.4236/sgre.2015.64006                

Abstract

Visual real-time monitoring is the premise of low frequency oscillation control in power grids. This paper showed a visual method for the control center of power grids to monitor low frequency oscillation. It processed the PMU real-time data with incomplete S-transform, and converted the waveforms to two-dimensional time-frequency figures which showed the initial time, frequency and amplitude of each low frequency oscillation mode directly. GPU was used to show figures and calculate FFT with the purpose of improving calculation efficiency. The results of practical cases show that the real-time characters of low frequency oscillation can be identified availably by this visualization real-time monitoring method which is helpful and suitable for practical application.

Keywords

Low Frequency Oscillation, Incomplete S-Transform, Real-Time Monitoring, Visual, GPU

Conflicts of Interest

The authors declare no conflicts of interest.

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