### Abstract

This paper presents a decoupled power control method for a single-phase grid-tied inverter that uses model predictive control (MPC) to minimize the number of switch state changes required to control the output bridge while simultaneously constraining the output current harmonics. On one hand, minimizing the number of switch state changes in the output bridge of the inverter results in minimizing switching losses. On the other hand, lower switching frequencies typically result in larger harmonic currents. The proposed controller evaluates a cost function with an adjustable weight factor. Total harmonic distortion (THD) of grid side current is the constraint of the controller which seeks to minimize switch state changes to lower switching losses while meeting the THD constraint. Thus the MPC performs constrained multi-objective optimization. Because the controller is harmonic-constrained, the single-phase inverter has robust operation under pulsating dc-link voltage, which allows a smaller dc-link capacitor and higher bus ripple voltage. The weight factor can be chosen from an engineering tradeoff between the output current THD and the switching frequency. The simulation results are verified experimentally by implementing the controller using DS1007 platform by dSPACE.

Original language | English |
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Title of host publication | 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 |

Publisher | Institute of Electrical and Electronics Engineers Inc. |

Pages | 5153-5159 |

Number of pages | 7 |

ISBN (Electronic) | 9781467371506 |

DOIs | |

Publication status | Published - 27 Oct 2015 |

Event | 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada Duration: 20 Sep 2015 → 24 Sep 2015 |

### Other

Other | 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 |
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Country | Canada |

City | Montreal |

Period | 20/9/15 → 24/9/15 |

### Fingerprint

### Keywords

- adjustable weight factor
- average switching frequency
- constraints
- decoupled power control
- model predictive control
- voltage source inverter

### ASJC Scopus subject areas

- Energy Engineering and Power Technology
- Electrical and Electronic Engineering

### Cite this

*2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015*(pp. 5153-5159). [7310386] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2015.7310386