Author(s)

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.

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.

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

Wen, B. , Li, S. , Zhou, C. , Luo, J. and Wang, F. (2015) A New Method for Visual Real-Time Monitoring of Low Frequency Oscillation. Smart Grid and Renewable Energy, 6, 59-66. doi: 10.4236/sgre.2015.64006.