Reducing the modulation voltage error in MMCs by considering the capacitor voltage change within one PWM cycle for improved current control
Reducing the modulation voltage error in MMCs by considering the capacitor voltage change within one PWM cycle for improved current control
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DOI：
10.23919/epe17ecceeurope.2017.8099169
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
M. Middeke;Hendrik Pehr;A. Gensior
中科院分区：
文献类型：
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作者：
M. Middeke;Hendrik Pehr;A. Gensior
检查调制期间电容器电压变化的影响，以提高模块化多电平转换器的臂电压。使用不同的方法来预测和补偿电容器电压变化以及由此产生的臂电压误差，其中两项改进提供了轻松升级现有调制算法的可能性。仿真和测量结果表明，与调制器中忽略电压变化的情况相比，臂电压误差减小，从而环流电流减小。
The impact of capacitor voltage changes during the modulation period is examined in order to improve the arm voltage of a modular multilevel converter. Different methods are used to predict and compensate for the capacitor voltage change and the resulting arm voltage error, whereby two of the improvements provide a possibility to easily upgrade existing modulation algorithms. Simulation and measurement results demonstrate a reduced arm voltage error and thus a reduced circulating current in comparison to the case when the voltage change is neglected in the modulator.