不同换流站Y／Y型换流变压器置换分析与实践  

Analysis and Practice of Replacement of Y/Y Type Converter Transformers at Different Converter Stations

作　　者：张鹏 刘红太 林睿 欧开健 孙勇 

机构地区：[1]南方电网超高压输电公司广州局,广州510405 [2]南方电网技术研究中心,广州510623

出　　处：《南方电网技术》2009年第2期65-67,共3页Southern Power System Technology

摘　　要：由于±500kV肇庆换流站Y/Y型换流变压器故障丧失备用,有必要探讨用深圳站Y/Y型换流变压器与肇庆站Y/Y型换流变压器并行的可能性。对两站Y/Y型换流变压器的技术规范进行了对比分析,以及对谐波电流分布进行了EMTDC和RTDS仿真研究。结果显示,深圳、肇庆两站换流变压器技术规范具有近似性,且换流变压器替换前后,各次谐波的含量和幅值,包括被替换相(即U相)和非替换相(如V相),大体上一致。进而提出了深圳站换流变压器在肇庆站使用时将分接开关档位整体下移一档的实施办法。The Y/Y phase U converter transformer at ＋500 kV Zhaoqing Converter Station was damaged, and the station lost its spare transformer, and thus it is needed to study feasibility of the Shenzhen＇s Y/Y converter transformer being in parallel operation with that of Zhaoqing Converter Station. This paper analyzes the technique criterions of the two transformers in comparison with each other, and carries out EMTDC and RTDS simulations to the harmonic current distributions. It is concluded that the two transformers have similar techneque criterions, and the harmonic currents, including the replaced phase （phase U） and the others, are almost the same in the content and breadth for the situations without and with parallel operation. Furthermore, it is proposed that the parallel operation should be done in the way to lower one step in the on-load tad of converter transformer in Shenzhen Converter Station.

关 键 词：±500kV换流站 实时数字仿真器(RTDS) 有载分接开关档位 谐波电流 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM422