| 分频输电应用于深远海风电并网的技术经济性分析 |
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| 引用本文： | 黄明煌,王秀丽,刘沈全,王锡凡,孟永庆,叶荣. 分频输电应用于深远海风电并网的技术经济性分析[J]. 电力系统自动化, 2019, 43(5): 167-174 |
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| 作者姓名： | 黄明煌 王秀丽 刘沈全 王锡凡 孟永庆 叶荣 |
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| 作者单位： | 西安交通大学电气工程学院;电力设备电气绝缘国家重点实验室西安交通大学;华南理工大学电力学院;国网福建省电力公司经济技术研究院 |
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| 基金项目： | 国家电网公司总部科技项目“大型深远海风电场高效送出与运行控制关键技术研究”；国家自然科学基金资助项目(51677142) |
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| 摘 要： | 全球海上风电发展呈现大规模化、集群化及深远海化的特点。离岸距离大于100 km的大规模深远海风电的输电与并网方式成为海上风电发展和研究的热点方向。通过分析电缆等电气设备的传输极限和损耗,采用等年值法,综合考虑设备投资成本、维护成本、损耗费用及电缆选型,建立了系统的比较各种并网方式的技术经济评价方法。以某400 MW海上风电场为例,对高压交流输电技术、高压直流输电技术和分频输电系统3种并网方式进行技术经济分析。论证说明分频输电技术通过降低频率,既可提高电缆载流量,又显著降低了交流电缆中的充电电流,因此传输距离显著增加,表明分频输电技术在远距离、大规模深远海风电并网方面具有技术经济优势。
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| 关 键 词： | 深远海风电并网；高压交流；高压直流；分频输电系统；技术经济分析 |
| 收稿时间： | 2018-07-25 |
| 修稿时间： | 2019-01-14 |
Technical and Economic Analysis on Fractional Frequency Transmission System for Integration of Long-distance Offshore Wind Farm |
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| HUANG Minghuang,WANG Xiuli,LIU Shenquan,WANG Xifan,MENG Yongqing and YE Rong. Technical and Economic Analysis on Fractional Frequency Transmission System for Integration of Long-distance Offshore Wind Farm[J]. Automation of Electric Power Systems, 2019, 43(5): 167-174 |
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| Authors: | HUANG Minghuang WANG Xiuli LIU Shenquan WANG Xifan MENG Yongqing YE Rong |
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| Affiliation: | School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China; State Key Laboratory of Electrical Insulation and Power Equipment, Xi''an Jiaotong University, Xi''an 710049, China,School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China; State Key Laboratory of Electrical Insulation and Power Equipment, Xi''an Jiaotong University, Xi''an 710049, China,School of Electric Power, South China university of Technology, Guangzhou 510641, China,School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China; State Key Laboratory of Electrical Insulation and Power Equipment, Xi''an Jiaotong University, Xi''an 710049, China,School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China; State Key Laboratory of Electrical Insulation and Power Equipment, Xi''an Jiaotong University, Xi''an 710049, China and Economic Research Institute of State Grid Fujian Electric Power Company, Fuzhou 350012, China |
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| Abstract: | Global offshore wind farm is developing towards large-scale, clustered and long-distance deep offshore. The transmission and grid connection of large-scale offshore wind farm with a distance greater than 100 kilometers has become a major focus of offshore wind energy development. A technical and economic evaluation method for systematically evaluating various grid-connected methods is established by analyzing transmission limit and loss of cable and other electrical equipment, using the uniform annual value method and considering equipment investment cost, maintenance cost, loss cost and cable selection. Taking a 400 MW offshore wind farm as an example, the technical and economic comparison of high voltage alternating current(HVAC), high voltage direct current(HVDC)and fractional frequency transmission system(FFTS)is carried out. The demonstration shows that FFTS by reducing the frequency can not only realize the growth of the ampacity of cable, but also significantly reduce the charging current in the AC cable. Therefore, the transmission distance of FFTS increases remarkably, which indicates that FFTS has both technical and economic advantages on large-scale and long-distance offshore wind farm transmission and connection system. |
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| Keywords: | long-distance deep offshore wind power high voltage alternating current(HVAC) high voltage direct current(HVDC) fractional frequency transmission system(FFTS) technical and economic analysis |
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