变电站3台主变压器2套10kV分段备用电源自动投入装置的配置方案

由于用电负荷日益增长,佛山地区电网的部分110 kV变电站要在已有两台主变压器的基础上扩建第3台主变压器,并在扩建的10 kV母线和相邻的10 kV母线之间增加1套10 kV分段备用电源自动投入装置以便提高供电的可靠性和连续性。针对这种情况,设计了3台主变压器2套10 kV分段备用电源自动投入装置的配置方案,并对其中的危险点进行了分析。该方案可以避免2套备自投动作范围叠加,其安全性和可靠性已在实践中得到证明。

A Configuration Scheme of Two Automatic Bus Transfer Equipments for 10 kV Sections in a Substation with Three Main Transformers

Along with the increasing of power load, part of 110 kV substations in Foshan Power Grid need to extend the third one based on the existing two main transformers. To improve power supply reliability and continuity, a 10 kV section backup power automatic switching is added between the extended 10 kV bus and its adjacent 10 kV bus. A configuration scheme of two 10 kV section backup power automatic switching is proposed in this paper to avoid superposition on their actuation range. This paper indicates its risk points, and its safety and reliability has been proofed in practice.