Active Impedance Reshaping for High-frequency Resonance Suppression of Renewable Energy Power Stations with STATCOM

The impedance characteristics of the renewable power station vary significantly under different operating conditions such as no-load and on-load operation of collector lines, which easily induces high-frequency resonance with the Static Synchronous Compensator (STATCOM) equipped in the station, resulting in equipment tripping and even damage. The reason is that the interaction between the negative damping characteristics of STATCOM and the collector line capacitance leads to the instability of the system at high frequencies. This paper proposes a