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Model Predictive Direct Power Control of DC Micro Grid Rectifier Based on Neutral Point Potential Balance

Author

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  • Lu Xiaojuan
  • Wang Xinju
  • Dong Haiying

Abstract

Aimed at the problem of DC micro grid rectifier control delay and the DC bus voltage stability, the method of two-step model predictive direct power control (TMPDPC) combined with neutral point potential control is proposed. Model predictive direct power control (MPDPC) is designed for rectifier. A cost function is then used to evaluate the active and reactive power ripples, from which the vector that generates the lowest power ripple will be applied during the next sampling interval. Two-step predictive control is designed to compensate for the delay of one-step predictive control. On the basis of this, the two-capacitor voltage unbalance problem in DC side is considered, and the neutral point potential control is added. In the Matlab/Simulink simulation, compared with control effect of direct power control (DPC) and one-step model predictive direct power control (OMPDPC), the control strategy of neutral point potential added to TMPDPC can make the system stability and control accuracy better. The validity of this scheme was validated by physical simulation at last.

Suggested Citation

  • Lu Xiaojuan & Wang Xinju & Dong Haiying, 2017. "Model Predictive Direct Power Control of DC Micro Grid Rectifier Based on Neutral Point Potential Balance," Mathematical Problems in Engineering, Hindawi, vol. 2017, pages 1-10, June.
    • Handle: RePEc:hin:jnlmpe:6571659
    DOI: 10.1155/2017/6571659
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