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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 ...
A High Performance PWM Algorithm for Common Mode Voltage Reduction in Three-phase Voltage Source Inverters
Uen, Emre; Hava, Ahmet Masum (2008-06-19)
A high performance PWM algorithm with reduced common mode voltage (CMV) and satisfactory overall performance is proposed for three-phase PWM inverter drives. The algorithm combines the near state PWM (NSPWM) method which has superior overall performance characteristics at high modulation index and MAZSPWM, a modified form of the active zero state PWM method (AZSPWM1), which is suitable for low modulation index range of operation. Since AZSPWM1 has line-to-line voltage pulse reversals with small zero-voltage...
A DC Bus Capacitor Design Method for Various Inverter Applications
Hava, Ahmet Masum; Aban, Vahap Volkan (2012-09-20)
This paper involves the selection and sizing of the appropriate type of dc bus capacitor for various applications utilizing PWM operated three-phase voltage source inverters, such as battery operated systems, PV (photovoltaic) systems, UPSs, and motor drives. It classifies the power converter topologies based on dc bus ripple current frequency characteristics. A general approach for ripple current characterization is provided. Based on these characteristics, the two capacitor types suitable for this purpose...
A Near State PWM Method With Reduced Switching Frequency And Reduced Common Mode Voltage For Three-Phase Voltage Source Inverters
Un, Emre; Hava, Ahmet Masum (2007-05-05)
The Near State PWM (NSPWM) method, which reduces the common mode voltage/current, is proposed for three-phase PWM inverter drives. The optimal voltage vectors and their sequences are determined. The voltage linearity and DC bus and AC output PWM current ripple characteristics are studied. The method is thoroughly investigated and its performance is compared to conventional methods. Theory, simulations, and experiments show that NSPWM exhibits superior common mode and satisfactory PWM ripple performance char...
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...
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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.