电网技术2011，Vol.35Issue(12)：26-32,7.
溪洛渡－浙西±800kV／7500MW特高压直流输电工程主回路参数设计
Study and Design of Main Circuit Parameters for ±800 kV/7 500 MW DC Power Transmission Project From Xiluodu to Zhexi
摘要
Abstract
The calculation of main circuit parameters is an important constituent part in the design of HVDC transmission projects. Each pole of the ±800 kV 7 500 MW DC power transmission project from Xiluodu to Zhexi is composed of two sieries connected 12-pulse converters, thus the operation modes of the DC transmission project can be flexibly regulated. According to the theory of UHVDC power transmission and the features of DC system, main circuit parameters of the DC transmission project is studied and designed. Following main design parameters of converter stations at both ends of the DC transmission project are obtained from the calculation results： inductance of smoothing reactor for each pole of each station is 4×75 mH, this 4×75mH inductance is splitted into two equal parts, one part is connected to pole bus and the other is connected to neutral bus; the converter transformers are composed of single-phase two-winding tranformers, at Xiluodu side the rated capacity of each single-phase tranformer is 378.5 MVA and its rated phase voltage is 171.3 kV and at Zhexi side the rated capacity of each single-phase tranformer is 358.4 MVA and its rated phase voltage is 162.2 kV, the short-circuit impedances of converter transfomer are 19% for both ends of the project while the tap changer is not adjusted; the number of transformer taps is set to ＋21/-6 at Xfluodu side and ＋24/-4 at Zhexi side, and voltage difference between two adjacent taps is 1.25% of the rated votlage at both sides; the absolute maximum no-load DC votlage 239.0 kV at Xiluodu side and 227.0 kV at Zhexi side. These data can be used as the foundation for subsequent research item of this project and is available for reference to other UHVDC transmission projects.关键词
特高压直流输电/主回路参数/换流变压器Key words
UHVDC power transmission/main circuitparameters/converter transformer分类
信息技术与安全科学引用本文复制引用
陈锡磊,周浩,沈扬,丁健,钱锋,周志超,陈稼苗..溪洛渡－浙西±800kV／7500MW特高压直流输电工程主回路参数设计[J].电网技术,2011,35(12):26-32,7.基金项目
国家重点基础研究发展计划项目（973项目）（2011CB209405）. （）
