Publication
Dong-Ho Choi, Jiho Ju, Jin-Hyuk Park, and June-Seok Lee, "Dead-Time Compensation Technique Reflecting the Ratio of the Polarity Based on the Current Prediction in Cascaded H-bridge Multilevel Inverter," in Proc. IECON 2023 - 49th Annual Conference of the IEEE Industrial Electronics Society, Singapore, 16-19 Oct. 2023.
2023
PEEMS
-
Dec. 1, 2023
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1. Authors: Dong-Ho Choi, Jiho Ju, Jin-Hyuk Park, and June-Seok Lee
2. Title: Dead-Time Compensation Technique Reflecting the Ratio of the Polarity Based on the Current Prediction in Cascaded H-bridge Multilevel Inverter
3. Published in: IECON 2023 - 49th Annual Conference of the IEEE Industrial Electronics Society
4. Date of Conference: 16-19 Oct. 2023
5. Conference Location: Singapore
6. Pages:
7. Abstract
: This article proposes a current-prediction-based dead-time compensation technique designed to reduce zero-current-clamping in grid-connected cascaded H-bridge multilevel inverters (CHMI) using phase-shifted PWM (PS-PWM). In general, dead-time compensation is achieved by adding an offset voltage, derived from the voltage drop during dead-time. This offset voltage formula incorporates a polarity of grid current. However, when this polarity undergoes a transition within the control period, effective compensation is hindered, leading to the zero-current-clamping phenomenon. This effect is more pronounced in practical systems that utilize the shadow register function of a digital signal processor (DSP). In CHMI systems, particularly those with a lower switching frequency, current distortion becomes more prominent. In the proposed technique, the polarity ratio of the grid current reference during a control period is determined using current reference predictions, facilitating the generation of a precise offset voltage. Consequently, there is a notable attenuation of the odd-harmonic components intrinsic to the grid current, leading to a reduction of the zero-current-clamping phenomenon. The validity of this technique is demonstrated through simulation results based on a 7-level CHMI configuration.
- Dec. 1, 2023 Joon-Seok Kim, Do-Hyeon Kim, June-Hee Lee, Young-Shin Song, and June-Seok Lee, "Synchronous PWM Pulse Number Selection for High-Efficiency Drive of Propulsion System," in Proc. IECON 2023 - 49th Annual Conference of the IEEE Industrial Electronics Society, Singapore, 16-19 Oct. 2023.
- Jun. 17, 2023 Tae-Hyeong Kim, Bum-Ryeol Yoon, June-Hee Lee, and June-Seok Lee, "Four legs Clamping Modulation Technique of Dual Inverter with Isolated DC Bus for Reduction of Switching Loss considering Power Factor," in Proc. 2023 IEEE Applied Power Electronics Conference and Exposition (APEC), Orlando, FL, USA, 19-23 Mar. 2023, pp. 257-262.
