Research on high voltage DC transmission system optimal control based on MMC
Research on high voltage DC transmission system optimal control based on MMC
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DOI：
10.1016/j.ijepes.2016.02.050
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发表时间：
2016-11
影响因子：
5.2
通讯作者：
X. Xia;Yun Zhou;Chunhui Fu;Zhengxin Zhou;Yusheng He
中科院分区：
文献类型：
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作者：
X. Xia;Yun Zhou;Chunhui Fu;Zhengxin Zhou;Yusheng He
在高压直流输电系统中，模块化多电平变换器（MMC）不能很好地维持电容器电压的平衡，也不具备直流侧故障通过能力。提出了由半桥模块和夹紧双子模块串联而成的MMC桥臂，可以减少稳态运行的损耗和元件的数量。基于MMC的拓扑结构，提出了循环电流抑制和电容电压平衡的重复预测控制。在PASAD/EMTDC软件环境下建立了相关模型，并开发了一种重复预测控制策略。仿真结果表明，该系统不仅具有直流侧故障通过能力，而且能够完成电容电压平衡任务，使循环电流最小化。
In high voltage direct current (HVDC) transmission system, modular multilevel converter (MMC) is not satisfactory to maintain the balance of the capacitor voltage and doesn’t have the DC side fault ride-through capability. This paper presents that the MMC bridge arm consisting of half bridge module and clamping double sub module in series can reduce the loss of steady state operation and the amount of components. The repetitive predictive control is proposed to suppress the circulation current and balance the capacitor voltage based on the topology of MMC. A related model is built in the PASAD/EMTDC software environment and a repetitive predictive control strategy is developed. The simulation results show that the proposed system not only has the DC side fault ride-through capability, but also carries out the capacitor voltage balancing task and minimizes the circulating currents.