一种具备直流故障阻断能力的混合型桥臂拓扑
A Hybrid Bridge-leg Topology with DC Fault Blocking Capability
何星柱 1张旭 1张文鹏 1花依男 1杨丹1
作者信息
- 1. 国网新疆电力有限公司超高压分公司,新疆 乌鲁木齐 830002
- 折叠
摘要
为使模块化多电平换流器具有直接阻断故障电流的能力,提出一种由钳位双电容子模块与半桥子模块混合的模块化多电平换流器桥臂拓扑设计方案.首先,介绍了钳位双电容子模块的结构和运行特性,进一步提出混合型桥臂拓扑的桥臂设计方案;其次,考虑成本及损耗,对钳位双电容子模块与混合型桥臂设计方案的经济性进行了对比分析;最后,在MATLAB仿真平台上构建柔性直流输电模型,验证了所提混合型桥臂设计方案的可行性.
Abstract
The flexible DC transmission scheme of modular multilevel converters based on half-bridge sub-module is widely a-dopted,yet it lacks direct fault current blocking capability.The clamp double-capacitor sub-module topology,equipped with bidi-rectional switches,can block the fault current but entails high operation losses and investment costs.A design scheme integra-ting clamp double-capacitor sub-modules and half-bridge sub-modules within the modular multilevel converter arm topology is proposed.This scheme introduces the design structure and principles of the hybrid modular multilevel converter bridge arm to-pology,and compares it with fault current-blocking sub modules in terms of cost and loss.Finally,the rationality and effective-ness of the hybrid bridge arm design scheme are validated by constructing a model on the MATLAB simulation platform,and compared with the clamp double-capacitor sub-module topology.
关键词
模块化多电平换流器/混合型桥臂拓扑/故障阻断/子模块拓扑Key words
modular multilevel converter/hybrid bridge arm topology/fault blocking/sub-module topology引用本文复制引用
出版年
2024
NETL
NSTL
万方数据