Method of Stability Boundary Construction for Offshore Wind Power Integration System

With large scale offshore wind power integration in recent years the grid operation department put forward need for risk assessment of oscillation for offshore wind power integration system. Based on analysis of typical oscillation scenario of offshore wind power integration system using eigenvalue method, this paper first suggest that stability boundary should be constructed for each specified mode according to its relevant oscillation scenario. Using sub and super synchronous oscillation mode dominated by current control of PMSG as example it was proposed to construct stability boundary using wing power output and short circuit ratio as parameters. The boundary could be generated by offline eigenvalue analysis of the system. 10 machines and 39 buses case system was applied for validation of the proposed method. Results showed that the proposed method was feasible for engineering application.