适用于架空线路的双极混合MMC-HVDC拓扑
发布时间：2018-10-19 14:23
【摘要】：为应对柔性直流输电在远距离大容量架空线输电领域应用问题,基于钳位双子模块和双晶闸管子模块拓扑构成的两种模块化多电平换流器,设计了串联双极混合直流输电系统,既提高了输电容量,又能缓解单种拓扑能耗较大或直流故障抑制时间较长问题。重点分析了双极混合拓扑在不同直流故障下等值电路和直流故障穿越机理及其抑制特性。最后,在PSCAD/EMTDC仿真环境下搭建双极混合直流输电模型,对系统稳态运行工况和直流故障穿越特性进行了对比研究。仿真结果表明,双极混合系统既体现出灵活多样的稳态运行特性,又具有直流故障穿越与快速恢复能力,较好地适用于远距离大容量架空线路输电应用领域。
[Abstract]:In order to deal with the application of flexible direct current transmission in the field of long-distance large capacity overhead transmission, a series bipolar hybrid DC transmission system is designed based on two modularized multilevel converters, which are composed of two modular multilevel converters based on the topology of clamped double submodules and double thyristor submodules. It can not only increase the transmission capacity, but also alleviate the problem of large energy consumption of single topology and long DC fault suppression time. The equivalent circuit of bipolar hybrid topology under different DC faults, the mechanism of DC fault traversing and its suppression characteristics are analyzed. Finally, a bipolar hybrid DC transmission model is built under the PSCAD/EMTDC simulation environment, and the steady-state operating conditions and DC fault traversing characteristics of the system are compared and studied. The simulation results show that the bipolar hybrid system not only embodies flexible and diverse steady-state operation characteristics, but also has the ability of DC fault traversing and fast recovery, which is suitable for long-distance and large-capacity overhead transmission applications.
【作者单位】： 新能源电力系统国家重点实验室(华北电力大学);国网唐山供电公司;
【基金】：国家高技术研究发展计划(863计划)资助项目(2015AA050603) 河北省自然科学基金资助项目(E2015502046)~~
【分类号】：TM721.1
，
本文编号：2281400
[Abstract]:In order to deal with the application of flexible direct current transmission in the field of long-distance large capacity overhead transmission, a series bipolar hybrid DC transmission system is designed based on two modularized multilevel converters, which are composed of two modular multilevel converters based on the topology of clamped double submodules and double thyristor submodules. It can not only increase the transmission capacity, but also alleviate the problem of large energy consumption of single topology and long DC fault suppression time. The equivalent circuit of bipolar hybrid topology under different DC faults, the mechanism of DC fault traversing and its suppression characteristics are analyzed. Finally, a bipolar hybrid DC transmission model is built under the PSCAD/EMTDC simulation environment, and the steady-state operating conditions and DC fault traversing characteristics of the system are compared and studied. The simulation results show that the bipolar hybrid system not only embodies flexible and diverse steady-state operation characteristics, but also has the ability of DC fault traversing and fast recovery, which is suitable for long-distance and large-capacity overhead transmission applications.
【作者单位】： 新能源电力系统国家重点实验室(华北电力大学);国网唐山供电公司;
【基金】：国家高技术研究发展计划(863计划)资助项目(2015AA050603) 河北省自然科学基金资助项目(E2015502046)~~
【分类号】：TM721.1
，
本文编号：2281400
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2281400.html
