一种模块化组合式直流变压器及其主回路参数选择方法  

Parameter Selection Method of Modular Combined DC Transformer and Its Main Circuit

作　　者：郑眉 陈骞 宋远见 徐政[2] 张哲任[2] ZHENG Mei;CHEN Qian;SONG Yuanjian;XU Zheng;ZHANG Zheren(State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,杭州310014 [2]浙江大学电气工程学院,杭州310027

出　　处：《高压电器》2021年第8期151-158,共8页High Voltage Apparatus

基　　金：国网浙江省电力有限公司电力科学研究院科技项目(SGTYHT/19⁃JS⁃218)。

摘　　要：当前,直流变压器是解决直流输电系统互联时电压等级不一致问题的主要方法,但传统的直流变压器中含有交流变压器因而价格昂贵。对此文中提出了一种无需交流变压器的模块化组合式直流变压器(modular combined DC transformer,MCT)。文中首先分析了MCT的拓扑结构和工作原理,然后根据MCT的性能要求提出了参数的选择原则,最后在PSCAD研究了含有MCT的直流输电系统仿真模型。时域仿真结果验证了文中所提出的MCT的可行性。At present,DC transformer is the main method to solve the problem of inconsistent voltage levels in case of interconnection of DC transmission system.However,the traditional DC transformer contains AC transformer and its price is therefore very expensive.For this issue,a kind of modular combined DC transformer(MCT for short)without AC transformer is proposed in this paper.Firstly,the topological structure and operating principle of MCT are analyzed.Then,the selection principle of parameters is proposed in accordance with the performance requirements of MCT.Finally,the simulation model of DC transmission system containing MCT is studied in PSCAD.The feasibility of the MCT proposed in this paper is verified by the time⁃domain simulation results.

关 键 词：多电压等级直流电网 模块化组合式直流变压器 直流变压器拓扑 主回路参数选择 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM41