Performance analysis of a large-scale hybrid offshore wind and marine-current farm connected to a power grid via an HVDC link

Abstract

This paper presents both steady-state ad transient analyzed results of a hybrid large-scale offshore wind and marine-current farm connected to an onshore power grid via a high-voltage direct current (HVDC) link. The performance of the studied offshore wind farm (OWF) is simulated by an equivalent aggregated 80-MW doubly-fed induction generator (DFIG) while the operating characteristics of the studied marine-current farm (MCF) are simulated by an equivalent aggregated 40-MW squirrel-cage induction generator (SCIG). Both frequency-domain approach based on a linearized system model using eigenvalue analysis and time-domain scheme based on a nonlinear system model subject to a disturbance condition are carried out. It can be concluded from the simulated steady-state ad transient results that the proposed HVDC link can effectively stabilize the studied hybrid OWF and MCF under various disturbance conditions.