[논문]Economic Assessments of LFAC and HVDC Transmissions for Large Offshore Wind Farms

Park, Taesik; Kwak, Nohong; Moon, Chaeju; Cha, Seungtae; Kwon, Seongchul

doi:10.18770/kepco.2015.01.01.073

Economic Assessments of LFAC and HVDC Transmissions for Large Offshore Wind Farms 원문보기

KEPCO Journal on electric power and energy, v.1 no.1, 2015년, pp.73 - 77

Park, Taesik (Department of Electrical Eng., Mokpo National Univ.) , Kwak, Nohong (Department of Electrical Eng., Mokpo National Univ.) , Moon, Chaeju (Department of Electrical Eng., Mokpo National Univ.) , Cha, Seungtae (KEPCO Research Institute, Korea Electric Power Corporation) , Kwon, Seongchul (KEPCO Research Institute, Korea Electric Power Corporation)

Abstract ▼ AI-Helper

Offshore wind farms extend a distance from an onshore grid to increase their generating power, but long distance and high power transmissions raise a lot of cost challenges. LFAC (Low Frequency AC) transmission is a new promising technology in high power and low cost power transmission fields against HVDC (High Voltage DC) and HVAC (High Voltage AC) transmissions. This paper presents an economic comparison of LFAC and HVDC transmissions for large offshore wind farms. The economic assessments of two different transmission technologies are analyzed and compared in terms of wind farm capacities (600 MW and 900 MW) and distances (from 25 km to 100 km) from the onshore grid. Based on this comparison, the economic feasibility of LFAC is verified as a most economical solution for remote offshore wind farms.

주제어

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문제 정의

However, economic investments are directly dependent on a power system configuration, a distance and transmission capability. Therefore, this paper proposes HVDC and LFAC power system configurations and presents an economic assessments and comparison of LFAC and HVDC transmissions for large offshore wind farms. The economic assessments of two different transmission technologies are analyzed based on the proposed power configurations and compared in terms of wind farm’s capacities (600 MW and 900 MW) and distances (from 25 km to 100 km) from the onshore grid.

가설 설정

A. Proposed Configuration of a HVDC transmission system for a remote wind farm.

대상 데이터

In this paper economic assessments of LFAC and HVDC transmission systems for a large remote wind farm are presented. The proposed power systems are analyzed and compared as 600 MW and 900 MW power transmissions with the distance range from 25 km and 200 km. The result shows that LFAC transmission system has more economical benefits than HVDC up to about 60 km for the 600 MW wind farm and 110 km for the 900 MW wind farm.

이론/모형

Cables for HVDC are cheaper than HVAC, and the cable costs of 220 MW, 350 MW and 500 MW are given in Table 1 [10]. The cable cost can be shown as (6) using a curve-fitting method.

성능/효과

The proposed power systems are analyzed and compared as 600 MW and 900 MW power transmissions with the distance range from 25 km and 200 km. The result shows that LFAC transmission system has more economical benefits than HVDC up to about 60 km for the 600 MW wind farm and 110 km for the 900 MW wind farm. However, these comparisons have no considerations about maintenances and reliability cost estimations, and their layouts cannot be exactly optimal configurations which can make a great impact on cost estimations.

참고문헌 (15)

ABB, "HVDC Transmission An economical complement to ac transmission," 2009.01
Raymundo E., "Offshore Wind Farm Grid Integration by VSC Technology with LCC-Based HVDC Transmission," IEEE Trans. On Sustainable Energy, Vol.3, No. 4, 2012. 10
Michael P. Bahrman, "The ABCs of HVDC Transmission Technologies," IEEE power & energy magazine, 2007.04
Rajat Majumder, "High -Voltage DC on the New Power Transmission Highway," IEEE power & energy magazine, 2012.11
Hualei Wang, "The advantages and disadvantages of using HVDC to interconnect AC networks," UPEC2010, 2010.09
Willis Long, "HVDC Transmission: Yesterday and Today," IEEE power & energy magazine, 2007.04
SIEMENS, "High Voltage Direct Current Transmission-Proven Technology for Power Exchange," 2011
Keeli Anupama, "Low frequency transmission for remote power generating systems", Georgia Tech., 2011
M. Zubiagal, G. Abad, "Frequency responses of AC transmission line," University of Mondragon, Ingeteam Corporation, Spain
Lazaros P. Lazaridis, "Economic comparison of HVAC and HVDC solutions for Large Offshore wind farms underspecial consideration of reliability," Royal Institute of Technology, 2005
ABB, "Middletown-Norwalk Transmission Project-Technical description of VSC HVDC Converer and cable technology," ABB power Technologies, 2004
ESS Inc, "Traqnsmission issues for offshre wind farms with specific application to sitting of the proposed cape wind project," Consultants to Cape Wind Associates, 2003
S Cole, D. Van Hertem, I. Pardon and R. Belmans, "Randstad HVDC," Research group Electa, Dept. of Electrical Engineering, KULeuven, Belgium, 2006
David Larsson, "Facts and HVDC for grid connection of Large Wind Farms," ABB, Power_Gen Europe, 2005
Lundberg S., "Configuration Study of Large Wind Parks," Chalmers University of Technology, 2003

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Economic Assessments of LFAC and HVDC Transmissions for Large Offshore Wind Farms 원문보기

Abstract ▼ AI-Helper

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가설 설정

A. Proposed Configuration of a HVDC transmission system for a remote wind farm.

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Economic Assessments of LFAC and HVDC Transmissions for Large Offshore Wind Farms 원문보기

Abstract ▼ AI-Helper

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가설 설정

A. Proposed Configuration of a HVDC transmission system for a remote wind farm.

대상 데이터

이론/모형

성능/효과

참고문헌 (15)

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원문 보기

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