Multi-infeed HVDC中混合高压直流输电对传统高压直流输电的影响  

Influence of Hybrid HVDC Transmission on Traditional HVDC Transmission for Multi-infeed HVDC

作　　者：梅永振 王海云[1] 李阳[1] 潘悦[1] 

机构地区：[1]新疆大学电气工程学院教育部可再生能源发电与并网控制工程技术研究中心,新疆乌鲁木齐830047

出　　处：《水电能源科学》2017年第5期191-194,共4页Water Resources and Power

基　　金：新疆维吾尔自治区重点实验室项目(2016D03021);教育部创新团队项目(IRT1285)

摘　　要：为分析Multi-infeed HVDC中两种结构的H-HVDC系统对LCC-HVDC系统的影响,引入换相失败免疫因子(CFII)指标定量评估了两种结构的H-HVDC系统对LCC-HVDC系统抵御换相失败能力的影响,基于PSCAD/EMTDC仿真软件建立了两种混合多馈入子系统,研究了两种混合系统在单相、三相接地故障状态下H-HVDC系统对LCC-HVDC系统暂态运行特性的影响。结果表明,VSC-LCC HVDC系统提高了LCC-HVDC系统抵御换相失败的能力;VSC-LCC HVDC系统有效地降低了LCC-HVDC系统的暂态过电压,对故障恢复时间也有一定的改善,提高了LCC-HVDC系统的暂态运行特性。The multi-infeed hybrid HVDC subsystem with LCC-HVDC and H-HVDC was taken for an example in this paper.Two topologies of H-HVDC(LCC-VSC HVDC and VSC-LCC HVDC)were analyzed in detail.Commutation failure immunity index(CFII)was introduced to quantitatively evaluate the influence of two topological structures of HHVDC on resisting commutation failure of LCC-HVDC.Calculation results show that the VSC-LCC HVDC improves the ability to resist the commutation failure for LCC-HVDC.Two kinds of dual-infeed hybrid HVDC subsystem were established based on PSCAD/EMTDC simulation software.The impacts of H-HVDC on the transient performance of LCCHVDC through single phase and three phase grounding fault were studied.Simulation results show that the VSC-LCC HVDC reduces the transient over-voltage and failure recovery time of LCC-HVDC effectively,and improves the transient operating characteristics of LCC-HVDC.

关 键 词：混合高压直流输电 换相失败免疫因子 暂态过电压 暂态运行特性 

分 类 号：TM721.1[电气工程—电力系统及自动化]