FAULT CONTROL AND RESTORATION SCHEME OF DC COLLECTION NETWORK FOR ALL-DC OFFSHORE WIND FARM

Ding Huaxing; Zou Guibin; Wang Fenglian; Ding Ning

doi:10.19912/j.0254-0096.tynxb.2023-0997

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (10) : 616-624. DOI: 10.19912/j.0254-0096.tynxb.2023-0997

FAULT CONTROL AND RESTORATION SCHEME OF DC COLLECTION NETWORK FOR ALL-DC OFFSHORE WIND FARM

Ding Huaxing¹, Zou Guibin¹, Wang Fenglian¹, Ding Ning²

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Abstract

This paper focuses on addressing the network fault handling problem in all-DC offshore wind farms. Firstly, fault control strategies for DC wind turbine units are investigated to enhance the safety of the units using the machine-side converter and unloading chopper circuits. Secondly, an improved topology of the grid-side DC/DC converter for DC wind turbines is proposed, which utilizes pulsed discharge of the grid-side capacitor in the DC/DC converter to perform traveling wave-based fault location. Finally, a fault control and restoration scheme based on DC circuit breakers is presented for the DC collection network. An all-DC wind farm model is built in PSCAD/EMTDC, and the effectiveness of the proposed fault control and restoration strategies is verified through simulations in various fault scenarios.

Key words

all-DC offshore wind farms / DC-DC convertor / fault location / fault control / fault restoration

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Ding Huaxing, Zou Guibin, Wang Fenglian, Ding Ning. FAULT CONTROL AND RESTORATION SCHEME OF DC COLLECTION NETWORK FOR ALL-DC OFFSHORE WIND FARM[J]. Acta Energiae Solaris Sinica. 2024, 45(10): 616-624 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0997

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