Generalized Synchronous Stabilization Control for Large-Scale Offshore Wind Power Plants During Severe AC Faults

Abstract

This paper provides a generalized synchronization stabilization control method for offshore wind power transmission systems, which can be used to maintain synchronization during severe AC faults. The proposed method introduces the dynamics of phase-locked loop into the active current loop, so as to trigger the negative feedback between active current and power angle in the power circuit stage to stabilize the phase tracking of wind power plants under complex operating conditions, e.g., including dynamic coupling between multiple wind power plants and considering voltage-dependent current injection specified by the fault ride-through codes. Comparing with the classic Lyapunov methods and equal-area methods, the proposed method does not require either detailed analytical expressions of the entire system or real-time fault detection and high-speed communication, which fundamentally creates a novel idea for distributed synchronous stabilization control. Finally, the feasibility of the proposed method is demonstrated by Matlab/Simulink results.