Stabilization Control of Power System with Large-Scale Wind Farm by HVDC Interconnection Line

Renewable energy such as wind energy has attracted special interest from the viewpoint of stability of energy supply nowadays. However, power system including large-scale wind farm (WF) can become unstable during a fault condition because of the instantaneous voltage drop and frequency fluctuations when WF is decoupled in accordance with the grid code of Fault Ride Through (FRT) requirement. This paper presents a new control strategy by High Voltage Direct Current (HVDC) transmission line. The proposed system controls active power and reactive power delivered to the grid from HVDC line during a fault condition. The effectiveness of the proposed method is confirmed by simulation analyses.