一种适用于架空线柔性直流输电的增强型四电平子模块拓扑

发布时间：2018-01-08 13:11

本文关键词：一种适用于架空线柔性直流输电的增强型四电平子模块拓扑　出处：《广东电力》2016年12期 　论文类型：期刊论文

【摘要】：架空线柔性直流输电技术在高压直流断路器尚未达到大规模商业化应用阶段,采用具有直流故障自清除能力的换流器拓扑具有重要的工程意义。基于改进型子模块的模块化多电平直流输电技术,提出了一种具有直流故障自清除能力的增强型四电平子模块(enhanced four level sub-module,EFLSM),可以独立控制每个电容的投切状态,任意输出3电平到0电平之间的4种电平,与现有的全桥子模块以及箝位双子模块相比,子模块在保证直流故障自清除能力的基础上,每个电容所平摊的半导体器件数有所下降,换流器损耗已接近传统的半桥子模块型模块化多电平换流器的水平。最后,应用电力系统计算机辅助设计和电磁暂态模拟程序软件(power system computer aided design and electric magnetic transient in DC system,PSCAD/EMTDC)搭建时域仿真模型进行仿真计算,验证所提拓扑的有效性。
[Abstract]:Overhead flexible DC transmission technology has not yet reached the stage of large-scale commercial application in HVDC circuit breakers. It is of great engineering significance to adopt converter topology with DC fault self-clearing capability. Modular multilevel HVDC transmission technology based on improved submodule is proposed. An enhanced four level sub-module EFLSM (enhanced four level sub-module) with DC fault self-clearing capability is proposed. The switching state of each capacitor can be independently controlled, and four levels between 3 and 0 levels can be output, compared with existing full-bridge submodules and clamped two-submodules. Based on the self-clearing capability of DC fault, the number of semiconductor devices per capacitor is reduced. The converter loss is close to the level of the traditional half-bridge modular modular multilevel converter. Finally. Application of Power system computer aided Design and electromagnetic transient Simulation Software (. Power system computer aided design and electric magnetic transient in. DC system. PSCAD / EMTDCbuilds a time domain simulation model to verify the validity of the proposed topology.
【作者单位】：国网浙江省电力公司杭州供电公司;
【分类号】：TM721.1
【正文快照】： 随着电力电子技术的发展,电压源换流器型高压直流输电(voltage source converter based highvoltage direct current,VSC-HVDC)技术已经成为目前学术研究的热点。近年来,模块化多电平换流器型高压直流输电技术(modular multilevel con-verter based high voltage direct curre

【相似文献】