A Benchmark Model of Grid-Connected Conversion System for Control Interaction Caused Oscillation Problems

The paper demonstrates a benchmark model to solve the latest oscillation problem that occurred in the power system with high proportion of renewable power generation. The oscillation problem is particularly related to the control interactions caused by power electronic devices. Hence, this model is simplified based on a grid-connected wind generation system. It shows the phenomena of sub-synchronous and super-synchronous oscillation under certain circumstances. The analytical techniques of the eigenvalue method and impedance-based method are both applied to this model which are demonstrated by the digital simulator (MATLAB Simulink). The model parameters are determined based on the Hami wind power system in Xinjiang, China. According to the simulation results, the model can present the sub-synchronous and super-synchronous oscillation phenomenon under certain conditions, which can be applied with different theoretical techniques.