Model Predictive Direct Power Control for Grid-Connected NPC Converters
Model Predictive Direct Power Control for Grid-Connected NPC Converters
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DOI：
10.1109/tie.2015.2410259
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发表时间：
2015-03
影响因子：
7.7
通讯作者：
James Scoltock;T. Geyer;U. Madawala
中科院分区：
文献类型：
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作者：
James Scoltock;T. Geyer;U. Madawala
提出了一种适用于大功率中性点箝位并网变流器的模型预测直接功率控制方案。控制器调节瞬时真实的和无功功率，以及中性点电位的转换器，在一组对称的界限内，而在同一时间，最小化的转换器的开关频率。所提出的方法是从以前的预测功率控制策略的不同之处在于，一个长的预测范围被使用，允许实现较低的设备开关频率。给出了系统的详细模型，并讨论了控制算法。仿真结果验证了该控制器对3kV 6.72MVA系统的适用性。实验结果，这是一个240 V的1.68 kVA的原型，显示出良好的协议与仿真中得到的，进一步验证了概念。
This paper presents a model predictive direct power control scheme for high-power grid-connected neutral-point-clamped converters. The controller regulates the instantaneous real and reactive powers, as well as the neutral-point potential of the converter, within a set of symmetrical bounds while, at the same time, minimizing the switching frequency of the converter. The proposed approach is distinct from previous predictive power control strategies in that a long prediction horizon is used, allowing lower device switching frequencies to be achieved. A detailed model of the system is provided, and the control algorithm is discussed. Simulation results validate the applicability of the controller to a 3-kV 6.72-MVA system. Experimental results, which are presented for a 240-V 1.68-kVA prototype, show good agreement with those obtained in simulation and further validate the concept.