500 kV变电站扩建改造二次接线注意事项及措施

主要介绍500 kV南宁变电站扩建改造工程概况，针对保护的二次接线进行难点分析及交待注意事项。此类改造难点在于考虑主变压器保护接线与母线保护接线，特别与失灵回路相关联的二次接线，在改造工程开始前应认真核对图纸并充分理解二次回路的设计思想。经过改造后的南宁变电站有效提高了对南宁地区的供电可靠性。

Secondary wiring notes and measures in 500 kV substation extension and reconstruction

This paper introduces a general situation of extension and reconstruction project of Nanning 500 kV transformer substations and analyzes the secondary wiring of protection and confessed notes. The difficulty is that it needs considering transformer protection secondary wiring and bus protection secondary wiring in such a reconstruction project,particularly the secondary circuit wiring associated with the failure. Before the start of the reconstruction project,engineers should carefully check the drawings an...