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不平衡工况下模块化多电平变换器直流母线电流纹波最小化

Minimization of DC-Bus Current Ripple in Modular Multilevel Converter Under Unbalanced Conditions

语言:

中文摘要

在不平衡工况下,模块化多电平变换器(MMC)的二倍频及倍频零序电流会流经直流母线,导致直流侧功率波动。本文提出了一种模型预测控制策略,旨在有效抑制直流母线电流纹波,提升系统在复杂电网环境下的运行稳定性。

English Abstract

In a modular multilevel converter (MMC), the zero-sequence currents at twice the fundamental frequency and its multiples flow through the dc bus and cause dc-bus power fluctuations during unbalanced conditions. These fluctuations appear in dc-bus current, considering that the dc-bus voltage is stiff. In this paper, a model-predictive control is proposed to minimize the ripple in dc-bus current. Th...
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SunView 深度解读

MMC拓扑在阳光电源的大型地面光伏电站及高压直流输电(HVDC)场景中具有潜在应用价值。该研究提出的模型预测控制(MPC)策略能有效解决不平衡电网下的直流侧波动问题,对于提升公司大型集中式逆变器及储能变流器(如PowerTitan系列)在弱电网或故障工况下的电能质量和系统可靠性具有重要参考意义。建议研发团队关注该控制算法在复杂电网环境下的动态响应性能,并探索其在多电平储能变流器中的工程化落地,以增强产品对电网不平衡故障的适应能力。