Design of Main Connection Scheme for Zhoushan Flexible Multi-Terminal HVDC Transmission Project
Design of Main Connection Scheme for Zhoushan Flexible Multi-Terminal HVDC Transmission Project
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作者：
Fangji Wu
输电工程主接线设计是工程设计的前提，在确定主接线方案的前提下进行主回路计算和设备选型。与传统的高压直流输电工程不同，柔性直流输电工程没有确定的主接线形式，但可以根据工程需要采用灵活的主接线方案。研究了柔性直流输电工程的主接线方案和接地方案，详细比较了不同主接线方案的特点，讨论了不同接地方案的优缺点及其适用范围，并对多端柔性直流输电系统换流站间的接线方式及其运行方式进行了研究。以舟山五端柔性直流输电示范工程为例，根据舟山直流输电工程的实际情况和换流站选址情况，对换流站内主接线方案的设计进行了系统的研究，给出了换流站内典型的主接线方案，可供后续多端柔性直流输电工程主接线方案的研究参考。
The main connection design is the premise for then engineering design of transmission project, and both the calculation of main circuit and the type-selection of equipment should be carried out under the premise of determining the main connection scheme. Otherwise than traditional HVDC transmission projects there is not determinate main connection forms for the flexible HVDC transmission project, but a flexible main connection scheme can be adopted according to the engineering requirement. The main connection schemes and the grounding schemes for the flexible HVDC transmission project are researched, and the features of different main connection schemes are compared in detail; the advantages and defects of different grounding schemes as well as their scopes of application are discussed; besides, the connection modes among converter stations of multi-terminal flexible HVDC transmission system and its operating modes are researched also. Taking the five-terminal Zhoushan flexible HVDC transmission demonstration project for example, according to actual conditions for Zhoushan HVDC transmission project and the sites for converter stations, the design of the main connection scheme is systemically researched, and the typical main connection scheme inside the converter station, which is available for reference to the follow-up research on the main connection scheme for multi-terminal flexible HVDC transmission project, is given.