±500kV同塔双回直流输电工程系统研究

Systematic Research on ±500 kV Double-circuit Direct Current Power Transmission Line on Same Tower Project

文中在总结研究国内外直流输电工程设计经验基础上,对±500 kV溪洛渡右岸电站送电广东同塔双回直流输电工程换流站内换流变压器、交直流侧滤波器及绝缘配合等方面的内容进行了研究和计算。给出了换流变压器的推荐型式和关键参数,滤波器的配置方案和元件参数,同时,基于高压直流输电换流站绝缘配合原则,提出了换流站避雷器配置方案,并计算了关键设备的绝缘水平。文中的研究结果可为以后直流输电工程的系统研究和换流站关键设备设计提供参考。

According to the design experiences of DC power transmission projects in the world, the converter transformer, AC filter, DC filter and insulation coordination in the converter station are analyzed and calculated for the ±500 k V double-circuit DC power transmission line on same tower project from Xiluodu Right Bank Power Station to Guangdong. The recommended type and key parameters of converter transformer, as well as the allocation scheme and component parameters of filters, are given. In addition,the lightning arresters allocation scheme for the converter station is proposed based on the rule of converter station insulation coordination of high-voltage DC power transmission, and the insulation grades of the key equipments are calculated. This study may provide a reference for systematic research of other DC transmission projects and design of key equipments in their converter stations.