珠海“互联网+”柔性直流配电网换流站设计方案

Design of Converter Stations of Zhuhai “Internet +” Flexible DC Distribution Network

[目的]支持能源消费革命的城市-园区双级"互联网+"项目(简称"互联网+"项目)成功试点了多电压等级多端柔性直流配电网技术。[方法]介绍了"互联网+"项目的整体系统设计方案,描述了采用可故障自清除的IGCT器件交叉箝位MMC的鸡山I换流站及采用半桥拓扑MMC和直流断路器的鸡山II、唐家换流站的原理,介绍了相同换流容量的鸡山I、鸡山II换流站的平面布置,对比了其占地和造价。[结果]分析可知:鸡山I、鸡山II换流站均可满足功能要求,鸡山I换流站占地、设备造价略占优势。[结论]作为"互联网+"项目的重要组成部分,鸡山I、鸡山II、唐家换流站的实施,成功试验了具有故障自清除能力的IGCT换流阀和半桥结构IGBT换流阀,成功试验了不同原理的直流断路器,是中低压柔性直流设备标准化的重要依据。

[Introduction]The "Internet plus"Project between urban and industrial park in support of the revolution of power consumption(abbr. "Internet +" project) successfully pilots multi-voltage multi-terminal flexible DC distribution network technology. [Method]In this article, the overall design plan was discussed. The principle of JS I converter station, which applied self fault clearance MMC based on cross clamped of IGCT devices, and JS II, TJ converter station, which applied half-bridge topology MMC and DC circuit breaker were described. The layout of JS I and JS II, which shared identical converter capacity was introduced. Their covered area and costs were compared. [Result]The results show that both JS I and JS II converter station are functional available and JS I station is slightly more land-saving and cost-saving. [Conclusion]As an important part of the "Internet +" project, the implementation of JS I, JS II and TJ converter station successfully test both the IGCT converter valve with fault self-cleaning capability and the half-bridge IGBT converter valve, successfully test DC breakers with different principles, which can be regarded as an important basis for device standardization.