三相V/V接线牵引变压器的应用

The Application of three phase V/Vconnection traction transformer

介绍了三相V/V接线新型牵引变压器的特点:该牵引变压器结构简单,两套绕组容量可灵活配置。与YN,d_(11)接线相比,变压器容量利用率高,抗短路能力强,分相有载调压方便。与单相V/V接线相比,易实现固定备用,提高了对牵引网和三相动力负荷供电的可靠性。为新建电气化铁路及其技术改造、牵引变压器的选型提供了新的方案。还详细介绍了电气化铁路采用这种变压器在工程设计中应注意的一些问题:如换相接入电力系统的方法、继电保护接线、短路电流计算及其它设计配套问题。

A new type of three phase V/V connection traction transfomer has been introduced, which has simple struture and two sets of coil volume to be arranged flexibly. Compared with YN, d11 connection, it has high efficency, anti short current, easy voltage modula- tion. Compared with single phase V/V connection, it is easy to realize equipment backup and to improve reliability of supply for traction electric network and other three phase load. Meanwhile it provides new scheme not only for electrical railway building and rebuilding, but also for selection of new traction transformer. Some problems being noticed on this transformer in project designment have been also introduced in details such as phase commutation, relay protection, computation of short current and other related dessiging problems.