Stabilization of Power System including Wind Farm by Cooperative Operation Between HVDC Interconnection Line and Battery

The penetration level of renewable energies, for example, wind power and solar power, into the existing grid has been increasing significantly, which has impact on the power system stability during transient period. Especially, the power system with large scale wind farm (WF) may not be stabilized during transient period due to a disconnection of WF caused by a network fault. In this paper, a new cooperative PID Fuzzy Logic Control (FLC) based Virtual Synchronous Generator (VSG) control method by High Voltage Direct Current (HVDC) line and the battery is proposed. The presented strategy consists of the active and reactive power controls to support the stability of the power system with large scale wind farm during transient period. To confirm the effectiveness of this proposed strategy, simulation analyses are performed on PSCAD/EMTDC.