变压器中性点加装电抗及隔直装置接线设计

The Main Electrical Circuit Design of Transformer Neutral Circuit Assembling Both Reactor and Blocking DC Device

随着电网结构的不断加强和直流输电的快速发展,部分变电站需同时装设中性点电抗和隔直装置。目前关于同时加装中性点电抗和隔直装置的变压器中性点回路的接线存在争议,各设计院在实际工程中的接线各不相同,综合考虑运行灵活性、检修方便性、技术经济性对中性点加装电抗器及隔直装置主接线设计进行了分析,分别针对电阻型直流抑制装置和电容型直流抑制装置提出了推荐的主接线方案,对保障变电站在设备检修情况下的安全稳定运行具有一定的参考价值。

With the gradual strengthening of power grid structure, it is necessary to simultaneously assemble both neutral reactor and blocking DC device to ensure the safety in some substations. Currently, there are still controversies on the neutral circuit design, and the electrical circuits are different from each other. Considering the operational flexibility, the maintenance convenience and economy, Research on the main electrical circuit design of transformer neutral circuit assembling both reactor and blocking DC device is implemented. A flexible scheme is proposed to ensure that the substation could safely operate in during the period of equipment maintenance.