Fault Ride Through and Grid Support Topology for the VSC-HVDC Connected Offshore Wind Farms - 2017


Voltage source converter (VSC) primarily based high voltage direct current (HVdc) transmission draws a lot of attention in recent years for the grid connection of enormous-scale offshore wind farms (WF). This paper proposes nine switch converter (NSC) based mostly configuration and control strategy for the VSC-HVdc connected offshore WFs to reinforce the fault ride through operation of the system. The configuration allows having both shunt and series interfaces to the onshore grid, that allows the isolation of the faulty part of the network, continuous power delivery to the healthy portion, and vital reduction of the fault current. Reduced switch count NSC is utilised at the onshore station to produce simultaneous shunt and series compensation to the electrical grid. The proposed management strategy ensures full power evacuation and the dc-link voltage regulation during network disturbances. The comparative analysis between the proposed and typical VSC-HVdc systems dole out in MATLAB/ Simulink environment revealed the former's enhanced transient performance.

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