摘要
基于模块化多电平换流器的高压直流(MMC-HVDC)输电技术已成为大规模、远距离风电场并网的理想解决方案。在风电渗透率较高时,风电场经MMC-HVDC并网系统呈现低惯量特性,增加储能系统并辅以适当的控制策略是提高系统惯量的方法。文中提出了一种基于复用桥臂的储能型模块化多电平换流器类全桥子模块拓扑,研究了该拓扑的调制和控制策略,并通过类全桥子模块和半桥子模块的混合,降低系统的成本和损耗。与单级式半桥子模块拓扑相比,所提拓扑对电池电压的要求显著降低,可以平滑电池电流;与两级式半桥子模块相比,所提拓扑具有直流故障阻断能力。最后,仿真和实验结果验证了所提拓扑和调制及控制策略的有效性。
The modular multilevel converter based high voltage direct current(MMC-HVDC) transmission technology has become an ideal solution to the integration of large-scale and remote wind farms. When the penetration rate of wind power is high, the MMC-HVDC system for wind farm integration presents low-inertia characteristics. A possible solution to improving system inertia is adding the energy storage system and the appropriate control strategy. This paper proposes a quasi-full-bridge submodule topology for the MMC with energy storage based on the multiplexing arm and studies its modulation and control strategy. The quasi-full-bridge submodule is mixed with the half-bridge submodule to reduce the cost and loss of the system. Compared with the single-stage half-bridge submodule topology, the proposed topology has significantly lower requirements on battery voltage and can smooth the battery current. Compared with the two-stage half-bridge submodule, the proposed topology has DC fault blocking capability. Finally, the simulation and experimental results verify the effectiveness of the proposed topology and the modulation and control strategies.
作者
曾武
李睿
蔡旭
ZENG Wu;LI Rui;CAI Xu(Energy Development Research Institute of China Southern Power Grid,Guangzhou 510700,China;Wind Power Research Center,School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2023年第3期177-186,共10页
Automation of Electric Power Systems
基金
国家重点研发计划资助项目(2018YFB1500702)
国家自然科学基金资助项目(52177187)。
关键词
柔性直流输电
风电场
模块化多电平换流器
类全桥子模块
直流故障阻断
电池储能
复用桥臂
flexible DC transmission
wind farm
modular multilevel converter(MMC)
quasi-full-bridge submodule(QFBSM)
DC fault blocking
battery energy storage
multiplexing arm
