Co-frequency Regional Power System Partition Method Based on Measured Frequency Dynamics

To provide a theoretical foundation for dynamic equivalent analysis and partition control in frequency issues of modern power systems, we proposed a co-frequency region partition method based on measured frequency dynamics. First, define the co-frequency region according to the application requirements of frequency dynamic analysis and control. The quantitative co-frequency index of the measured frequency dynamics between buses is proposed with the correlation coefficient. Then, we propose a co-frequency region partition method based on spectral clustering algorithm. The method based on the constructed frequency dynamics similarity graph can effectively extract the information of measured data to realize an appreciate number of clusters for the power system without knowing the system models and parameters. The IEEE 118-bus test system is applied to verify the effectiveness of the proposed method. Finally, the application scenarios of the co-frequency region partition are further illustrated.