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DC-link voltage control of HVDC for offshore wind farm using improved de-loading method
- Authors
- Huh, J.-S.; Moon, W.-S.; Park, S.-I.; Kim, D.-H.; Kim, J.-C.
- Issue Date
- 2015
- Publisher
- Korean Institute of Electrical Engineers
- Keywords
- DC-link voltage control; De-loading method; High Voltage Direct Current(HVDC); Low Voltage Ride Through(LVRT); Offshore wind farm
- Citation
- Transactions of the Korean Institute of Electrical Engineers, v.64, no.3, pp.399 - 404
- Volume
- 64
- Number
- 3
- Start Page
- 399
- End Page
- 404
- ISSN
- 1975-8359
- Abstract
- This paper presents the DC voltage control method in DC link of High Voltage Direct Current(HVDC) for an offshore wind farm in Low Voltage Ride Through(LVRT) situation. Wind generators in an offshore wind farm are connected to onshore network via HVDC transmission. Due to LVRT control of grid side inverter in HVDC, power imbalancing in DC link is generated and this consequentially causes rising of DC voltage. A de-loading scheme is one of the method to protect the wind power system DC link capacitors from over voltage. But the flaw of this method is slow control response time and that it needs long recovery time to pre-fault condition after fault clear. Thus, this paper proposes improved de-loading method and we analyze control performance for DC voltage in LVRT control of HVDC for an offshore wind farm. Copyright © The Korean Institute of Electrical Engineers.
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Related Researcher
- Kim, Jae Chul
- College of Engineering (School of Electrical Engineering)