Economic Analysis of Fractional Frequency Transmission System for Offshore Wind Farm Based on Modular Multilevel Matrix Converter

WANG Dayang; LIU Zongye; LI Pei; HUANG Jin; CAO Jing; JI Yucong; ZHOU Ruibing

doi:10.16513/j.cnki.10-1427/tk.2018.02.003

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Distributed Energy ›› 2018, Vol. 3 ›› Issue (2) : 16-22. DOI: 10.16513/j.cnki.10-1427/tk.2018.02.003

Basic Research

Economic Analysis of Fractional Frequency Transmission System for Offshore Wind Farm Based on Modular Multilevel Matrix Converter

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Abstract

Taking the large-capacity and long-distance offshore wind farm as the research background, this paper comprehensively compares the economy of the offshore high-voltage DC (HVDC) transmission system and the fractional frequency transmission system (FFTS), and aims to provide a feasible and economically reasonable new reference technology solution for long-distance and large capacity offshore wind power integration. Firstly, through the analysis of the main equipment, the HVDC transmission system and the FFTS are compared. Secondly, based on the existing equipment cost, the discounted cash flow model method is used to analyze and compare the economy between modular multilevel converter (MMC)-based offshore HVDC transmission system and modular multilevel matrix converter (M3C)-based offshore transmission system, with considering the system investment costs, maintenance costs and equipment loss. Finally, it is concluded that the critical economic distance between the offshore HVDC transmission system and the offshore FFTS is approximately 125 km offshore.

Key words

offshore wind farm / high-voltage DC (HVDC) transmission / fractional frequency transmission system (FFTS) / modular multilevel matrix converter (M3C) / economic distance

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WANG Dayang,LIU Zongye,LI Pei,HUANG Jin,CAO Jing,JI Yucong,ZHOU Ruibing. Economic Analysis of Fractional Frequency Transmission System for Offshore Wind Farm Based on Modular Multilevel Matrix Converter[J]. Distributed Energy Resources. 2018, 3(2): 16-22 https://doi.org/10.16513/j.cnki.10-1427/tk.2018.02.003

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