SUN Zilan,XIONG Liansong,XIE Yihan.Low-voltage and Small-capacity Converter Based Startup Strategy for Offshore Wind Power Transmission System Using Phase-shifted Diode Rectifier[J].Automation of Electric Power Systems,2026,50(20):156-165.
SUN Zilan,XIONG Liansong,XIE Yihan.Low-voltage and Small-capacity Converter Based Startup Strategy for Offshore Wind Power Transmission System Using Phase-shifted Diode Rectifier[J].Automation of Electric Power Systems,2026,50(20):156-165.DOI: 10.7500/AEPS20251103018.
Low-voltage and Small-capacity Converter Based Startup Strategy for Offshore Wind Power Transmission System Using Phase-shifted Diode Rectifier
The phase-shifted diode rectifier (PSDR) transmission topology can achieve harmonic self-cancellation through its topological structure
thereby reducing or even eliminating the need for filtering devices. Compared with conventional diode rectifier transmission schemes
the PSDR transmission scheme has certain cost advantages and shows potential for the application in the field of deep-sea offshore wind power (DSOWP). However
due to the inherent uncontrollability and unidirectional conduction characteristics of the diode rectifier
PSDR converter stations cannot supply power for offshore wind farm startup. Based on the low-voltage and small-capacity auxiliary converter
this paper proposes a low-cost autonomous startup scheme for the DSOWP transmission system using PSDR. By configuring a tapped transformer at two discrete voltage levels in the onshore converter station and paralleling a low-voltage and small-capacity auxiliary converter on both AC and DC sides of the PSDR in the offshore converter station
the system achieves staged operation with low-voltage startup and high-voltage transmission. The main circuit topology and staged operating process of the system are presented sequentially
the control strategy is elaborated
and the control objectives and implementation methods of the auxiliary converter at different stages are detailed. The selection of auxiliary converter capacity and its reactive power compensation effect are analyzed. Finally
full-time-domain simulation is conducted to verify the effectiveness of the proposed scheme and control strategy.
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