DC-link voltage control of HVDC for offshore wind farm using improved de-loading method

被引：1
|
作者：
Huh, Jae-Sun [1 ]
Moon, Won-Sik [1 ]
Park, Sang-In [1 ]
Kim, Doo-Hee [1 ]
Kim, Jae-Chul [1 ]
机构：
[1] Dept. of Electrical Engineering, Soongsil University, Korea, Republic of
来源：
Transactions of the Korean Institute of Electrical Engineers | 2015年 / 64卷 / 03期
关键词：
Electric machine control - Electric power system control - Onshore wind farms - Voltage control - Loading - HVDC power transmission - Electric power system interconnection - Electric utilities;
D O I：
10.5370/KIEE.2015.64.3.399
中图分类号：
学科分类号：
摘要：
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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页码：399 / 404
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