3-VECTOR MODEL PREDICTIVE CURRENT CONTROL OF SINGLE-PHASE NPC INVERTER

Xu Anfei; Cai Yuhua; Yuan Lei; Mei Jiawei

doi:10.19912/j.0254-0096.tynxb.2023-1712

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 175-183. DOI: 10.19912/j.0254-0096.tynxb.2023-1712

3-VECTOR MODEL PREDICTIVE CURRENT CONTROL OF SINGLE-PHASE NPC INVERTER

Xu Anfei, Cai Yuhua, Yuan Lei, Mei Jiawei

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Abstract

Aiming at the drawbacks of finite constraint set-model predictive current control （FCS-MPCC） for single-phase neutral point clamped （NPC） three-level inverters without modulator, unfixed frequency, and high switching frequency, an optimized 3-vector multi-objective predictive current control is proposed in this paper. The method divides the voltage vector into a number of sectors with fixed switching action by calculating the duty cycle, thus achieving pulse modulation with fixed switching frequency. The cost function applies multi-objective predictive control to achieve the balance of neutral point potential and reduce the switching frequency. In addition, the paper considers delay compensation. The effectiveness of the method is verified by implementing the proposed strategy on a single-phase NPC inverter experimental platform using a DSP-TMS320F28374D.

Key words

three level NPC inverter / model predictive current control / fixed switching frequency / neutral-point voltage balance / delay compensation

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Xu Anfei, Cai Yuhua, Yuan Lei, Mei Jiawei. 3-VECTOR MODEL PREDICTIVE CURRENT CONTROL OF SINGLE-PHASE NPC INVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 175-183 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1712

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