| 引用本文: | 谢晔源,姚宏洋,李海英,殷冠贤,欧阳有鹏,李钊.用于VSC-HVDC系统的模块化直串式直流耗能装置[J].电力自动化设备,2021,41(7): |
| XIE Yeyuan,YAO Hongyang,LI Haiying,YIN Guanxian,OUYANG Youpeng,LI Zhao.Modular series-connection DC energy braking device for VSC-HVDC system[J].Electric Power Automation Equipment,2021,41(7): |
|
| 摘要: |
| 柔性直流输电(VSC-HVDC)因其所具备的长距离输电损耗低而易于实现故障隔离与穿越、独立控制有功与无功等优势，使得其在海上风电并网领域具备极大的应用前景。为了实现海上风电VSC-HVDC系统的故障穿越，在对比分析现有耗能装置方案的基础上，提出一种经济型模块化直串式直流耗能装置拓扑。该拓扑结合了集中式耗能电阻户外散热和分布式模块自取能、软开关控制的优势，解决了拓扑中功率器件异步通断造成的子模块电压持续攀升的可控放电难题。详述了所提拓扑的详细工作状态与控制策略，并通过模块样机实验及等效最小系统实验验证了所提拓扑的可行性与子模块可控放电控制逻辑。通过RTDS实验验证了模块化直串式直流耗能装置能够实现系统的平滑故障穿越。 |
| 关键词: VSC-HVDC 故障穿越 直流耗能装置 模块化 直串式 |
| DOI：10.16081/j.epae.202103010 |
| 分类号:TM721.1;TM46 |
| 基金项目:国家重点研发计划项目(2017YFB0903100)；国家电网公司科技项目(5200-201956109A-0-0-00) |
|
| Modular series-connection DC energy braking device for VSC-HVDC system |
|
XIE Yeyuan, YAO Hongyang, LI Haiying, YIN Guanxian, OUYANG Youpeng, LI Zhao
|
|
NR Electric Co.,Ltd.,Nanjing 211102, China
|
| Abstract: |
| Due to the advantages of low transmission loss, VSC-HVDC(Voltage Source Converter-based High Voltage Direct Current) is easy to realize fault isolation, fault ride through and independent control of active and reactive power, which makes it have great application prospect in the field of offshore wind power integration. In order to realize the fault ride through of offshore wind power VSC-HVDC system, based on the comparison and analysis of the existing DC energy braking device schemes, an economical modular series-connection DC energy braking device topology is proposed, which combines the advantages of resistor outdoor heat dissipation, distributed module self-energy acquisition and soft switching control, and solves the controllable discharge problem of the sub module voltage rising continuously caused by the asynchronous switching on-off of power devices. The detailed operation status and control strategy of the proposed topology are ana-lyzed. The feasibility of the proposed topology and the control strategy of sub module controllable discharge are verified by the module prototype experiment and equivalent minimum system experiment. RTDS experiment verifies that the proposed modular series-connection DC energy braking device can realize the smooth fault ride through of system. |
| Key words: VSC-HVDC fault ride through DC energy braking device modular series-connection |
