A real-time identification scheme of coherent generators based on the WAMS information

With the fast development of WAMS system, we can obtain the real-time information of power system, which makes it possible to realize the real-time transient stability analysis and close-loop control. The coherent generators identification plays an important role in the transient stability analysis on power system. It is the first step to study the stability of a multi-machine power system. So research on a coherent generators identification scheme based on the real-time information is necessary and vital important. This paper proposes an identification scheme of coherent generators which can be applied online based on the WAMS information. The scheme has advantages of little computation, fast identification speed and high accuracy. Besides, a coherency index is also proposed to evaluate the clustering result. The simulation on IEEE standard 39-bus-10-unit system verifies the speed and accuracy of the scheme.