A novel two-parameter modulation and neutral point potential control method for the three-level neutral point clamped inverter

Date

2007-05-05

Author

Uestuentepe, Buelent
Hava, Ahmet Masum

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In this work, the Neutral Point Potential (NPP) drift/fluctuation of the three-level Neutral Point Clamped (NPC) inverter is analyzed and a novel control algorithm, the two-parameter PWM method is proposed to confine the NPP variation to a very small range. The two-parameter PWM method provides superior NPP control performance even with small DC bus capacitors. The method is based on PWM pulse pattern modification and requires no additional hardware. Detailed analytical models of the neutral point current and NPP as a function of the modulation parameters are established and the NPP behavior is thoroughly investigated. Based on the study, the deficiency of the known methods is illustrated and the two-parameter PWM method is developed and its superior performance is demonstrated. The performance of the two-parameter PWM method is verified by means of computer simulations utilizing both the per-PWM-cycle average model and the detailed model of the inverter. The results are supported by laboratory experiments involving both an R-L load and an induction motor drive.

Subject Keywords

Pulse width modulation, Pulse width modulation inverters, Fluctuations, Algorithm design and analysis, Capacitors, Space vector pulse width modulation, Hardware, Analytical models, Computer simulation, Laboratories

URI

https://hdl.handle.net/11511/42625

DOI

https://doi.org/10.1109/iemdc.2007.382760

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

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A novel two-parameter modulation and neutral point potential control method for the three-level neutral point clamped inverter Üstüntepe, Bülent; Hava, Ahmet Masum; Department of Electrical and Electronics Engineering (2005) In this thesis, the neutral point potential drift/fluctuation of the three-level neutral point clamped inverter is analyzed and a novel control algorithm, the two-parameter PWM method is proposed to confine the neutral point potential variation to a very small range. The two-parameter PWM method provides superior neutral point potential control performance even with small DC bus capacitors. The method is based on PWM pulse pattern modification and requires no additional hardware. Detailed analytical models ...
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A Near-State PWM Method With Reduced Switching Losses and Reduced Common-Mode Voltage for Three-Phase Voltage Source Inverters Uen, Emre; Hava, Ahmet Masum (2009-03-01) The near-state pulsewidth modulation (NSPWM) method, which reduces the common-mode voltage/current, is proposed for three-phase pulsewidth modulation (PWM) inverter drives. The method is described, its optimal voltage vectors are found, and the sequence that these vectors are applied is determined. Its voltage linearity and de bus and ac output PWM current ripple characteristics are studied. Its output line-to-line voltage pattern is carefully studied with regard to switching transients that may cause overv...

Citation Formats

B. Uestuentepe and A. M. Hava, “A novel two-parameter modulation and neutral point potential control method for the three-level neutral point clamped inverter,” 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42625.