Coordinated Voltage Control for Offshore Wind Farm Equipped with SVG and Energy Storage

In the power system integrated with offshore wind farm, energy storage is utilized for active power balance and voltage stability. This paper proposes a coordinated voltage control method for offshore wind farm with three types of reactive power sources. The detailed mathematical model of offshore wind farm with SVG and energy storage is established. By means of reactive power requirement calculation of point of interconnection (POI), the proposed method can compensate reactive power with comprehensive utilization of reactive power sources containing offshore wind farm, static var generator (SVG) system and energy storage. The compensation priority of each reactive power source is determined according to voltage variation conditions, and the reactive power support capability of the wind farm is improved by de-loading control. Based on real offshore wind farm in Jiangsu Province, the effectiveness of proposed voltage control method is verified in PSCAD.