Power‐oscillation evaluation in power systems with high penetration of renewable power generation based on network virtual inertia

Abstract

With regards to the problems in which the power-oscillation characteristics of power systems with high penetration of renewable power generation are complex and difficult to effectively analyse, a novel network virtual-inertia method is proposed to evaluate the power oscillation in such systems. Firstly, the network virtual inertia is defined and developed. Secondly, the network virtual inertia is calculated and obtained based on the measurement information. Thirdly, the relationship between the network virtual inertia and generator inertia is constructed. Finally, the network virtual inertia of power systems with high penetration of renewable power generation is analysed. The evaluation method is effective and easy to implement. Simulations involving four-generator two-area containing renewable power generation were conducted under various disturbances to prove the effectiveness of the proposed method.