大容量海上双馈风电场的高压直流输电技术概述

基于双馈机组的风电场不同于基于同步发电机的传统的发电厂，其高压直流输电技术具有一定的特殊性。本文对用于大容量双馈风电场的高压直流输电技术进行了概述。首先介绍了高压交流和直流输电技术针对海上风电应用的优缺点。然后对比了传统电力系统中的两种经典高压直流输电技术，即相控换流高压直流输电与轻型直流输电技术，并对二者应用于双馈风电场后的优缺点进行了分析。为克服其中存在的弊端，最后介绍了一种结合了静止同步补偿器（STATCOM）、相控换流器以及全控电流源型逆变器的混合型高压直流输电拓扑。

Review on the High-voltage DC Transmission Technology for Offshore Doubly-fed Induction Generator-based Wind Farms

The characteristics of doubly - fed induction generator （DFIG） - based on wind farms substantially is different from those synchronous machine - based on power plants. Due to this reason, the high - voltage DC （HVDC） transmission technology that can be applied is limited. This paper gives an overview on this kind of HVDC technology. Firstly, the cons - and - pros of high - voltage ac and high - voltage dc technology for offshore wind farms are briefly described. Then the two typical HVDC technologies, i.e. Line - Co mmutated Converter - HVDC （ LCC - HVDC） and Voltage Source Converter - HVDC （ VSC - HVDC） used in conventional power system are introduced. Their adaptations for connecting DFIG - based on wind farms are also analyzed and the respective drawbacks are pointed out. Finally, a new hybrid HVDC technology specifically designed for DFIG -based on wind farm is mentioned, which incorporates the STATCOM （Static Synchronous Compensator）, LCC and current source inverter （CSI） technologies.