Abstract
This paper presents a finite control set model predictive strategy to control the three-phase four-leg neutral-point-clamped (NPC) inverters. The four-leg NPC inverter delivers power to the unbalanced/nonlinear three-phase loads, and it can produce three output currents independently. The proposed method uses the discrete-time model of the inverter and load to predict the load current and capacitor voltages behavior for each valid switching state of the inverter. The control method chooses a state which generates the minimum error between the output currents and their references and also between the capacitor voltages. The neutral-leg switching frequency reduction algorithm is also proposed to improve the efficiency of the converter. Through computer simulations, the feasibility of the proposed predictive control scheme is verified; it performs well, showing a clear capacity to compensate disturbances while balancing the DC-link capacitor voltages and reducing the average switching frequency.
Original language | English |
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Title of host publication | 2013 IEEE International Symposium on Industrial Electronics, ISIE 2013 |
DOIs | |
Publication status | Published - 22 Aug 2013 |
Event | 2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013 - Taipei, Taiwan, Province of China Duration: 28 May 2013 → 31 May 2013 |
Other
Other | 2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013 |
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Country/Territory | Taiwan, Province of China |
City | Taipei |
Period | 28/05/13 → 31/05/13 |
Keywords
- Diode-clamped
- Four-leg converters
- NPC inverter
- Predictive control
- Three-level converters
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Control and Systems Engineering