增加合解环功能的备自投在110kV内桥式主接线变电站中的应用

Application of back-up switching equipments with the new function of closing or opening loops in 110 kV inner-bridge-connected substations

随着技术和经济的发展,用户对供电的质量,连续性和可靠性的要求越来越高,备用电源自动投入装置在保证供电质量方面取得了较好的成效,目前在电力系统中被广泛使用。内桥式接线是变电站较为普遍的主接线方式,其优点是设备比较简单,运行灵活性好。通过对110kV内桥式主接线变电站主要运行方式的分析,给出了110kV进线桥备自投逻辑的解决方案,本方案考虑了各种运行方式下主变动作和开关偷跳时对备自投的逻辑要求,给出了改进后的备自投逻辑。另外在备自投装置中增加了合解环功能,为110kV电网合解环操作提供了新的思路。

With the development of technology, the quality, continuity and reliability of the power supply are required higher. Buck-up switching equipments have been widely applied to meet this demand of customers. The inner-bridge connection has been widely used in substations, with the advantage of simple equipment and flexible operating modes. In this paper, the main operation modes in 1 lOkV inner-bridge-connected substation are analyzed. The operating principle of the back-up switching equipments are described in the situation of protection actions of the main transformers or in switchgear accidents. In addition, the new function of the operation of closing or opening of the loop in distribution network is added to the back-up switching equipments, which provides a new method to solve corresponding problems.