远海岸海上风电输电方式技术经济分析  

Techno-Economic Analysis of Far Coast Offshore Wind Power Transmission Modes

作　　者：吴倩 薄鑫 吴杨勇 郑宇超 WU Qian;BO Xin;WU Yang-yong;ZHENG Yu-chao(State Grid Jiangsu Electric Power Co.,Ltd.Economic Research Institute,Nanjing 210008,China;State Grid Anhui Electric Power Co.,Ltd.Qimen County Electric Power Supply Company,Qimen 245600,China)

机构地区：[1]国网江苏省电力有限公司经济技术研究院,江苏南京210008 [2]国网安徽省电力有限公司祁门县供电公司,安徽祁门245600

出　　处：《电工电气》2024年第1期1-9,15,共10页Electrotechnics Electric

基　　金：国网江苏省电力有限公司科技项目(J2022037)。

摘　　要：全球海上风电呈现远海化、规模化、集群化趋势,远海风电输电方式选择至关重要。考虑海上风电场规模、离岸距离等因素,采用等年值法,结合14种远海风电典型场景,从技术性、经济性两个维度,对高压工频交流、柔性直流、低频交流等3种海上风电输电方式进行对比分析。研究表明,工频交流输电技术在中小容量、中远距离海上风电送出应用场景具有技术、经济优势,柔性直流输电技术应用于大容量、远距离海上风电送出场景时经济优势凸显。同时,对35、66 kV交流汇集-柔直送出两种方案进行比较,指出66 kV汇集无海上升压站-柔直方案更具经济性,进一步缩短了交直流输电方式等价距离,并给出典型场景海上风电输电方式选择建议,提出了远海岸海上风电送出方式选择指导意见。The global offshore wind power shows the trend of far coast,large-scale and cluster,and the choice of offshore wind power transmission mode is very important.Considering the factors such as the scale of offshore wind farms and the offshore distance,this paper adopts the equal annual value method and combines 14 typical scenarios of offshore wind power.From the two dimensions of technology and economy,makes a comparative analysis of three types of offshore wind power transmission methods,including high-voltage power frequency AC,flexible DC and low-frequency AC.The results show that the power frequency AC transmission technology has technical and economic advantages in the application scenarios of small and medium-capacity,medium-and long-distance offshore wind power transmission,and the economic advantages of flexible DC transmission technology are prominent when applied to large-capacity and long-distance offshore wind power transmission scenarios.At the same time,the comparison of the 35 and 66 kV AC convergence-flexible direct transmission schemes is carried out,and it is pointed out that the 66 kV convergence without oversea booster station-flexible direct transmission scheme is more economical,which further shortens the equivalent distance of AC and DC transmission modes.Then,suggestions on the selection of offshore wind power transmission methods in typical scenarios are given,and guidance on the selection of offshore wind power transmission methods in far coast is proposed.

关 键 词：远海岸 海上风电 高压工频交流 柔性直流 低频交流 输电方式 技术经济分析 

分 类 号：TM614[电气工程—电力系统及自动化] TM722