TY - GEN
T1 - Fast-processing modulation strategy for the neutral-point-clamped converter with total elimination of the low-frequency voltage oscillations in the neutral point
AU - Pou, J.
AU - Rodríguez, P.
AU - Sala, V.
AU - Zaragoza, J.
AU - Burgos, R.
AU - Boroyevich, D.
PY - 2005
Y1 - 2005
N2 - This paper presents a novel modulation strategy for the neutral-point-clamped converter. This strategy overcomes one of the main problems of this converter, which is the low-frequency voltage oscillation that appears in the neutral point under some operating conditions. The proposed modulation strategy can completely remove this oscillation for all the operating points and for any kind of loads, even unbalanced and nonlinear loads. The algorithm is based on a carrier-based PWM. Nevertheless, it can generate the maximum output voltage amplitudes attainable under linear modulation, such as space-vector modulation. Furthermore, this technique can be implemented with a very simple algorithm, and hence can be processed very quickly. A control loop for balancing the voltages on the dc-link capacitors is also proposed. This balancing strategy is designed so that it does not increase the switching frequencies of the devices when it is applied to the converter. The proposed modulation technique is verified by simulation and experiment.
AB - This paper presents a novel modulation strategy for the neutral-point-clamped converter. This strategy overcomes one of the main problems of this converter, which is the low-frequency voltage oscillation that appears in the neutral point under some operating conditions. The proposed modulation strategy can completely remove this oscillation for all the operating points and for any kind of loads, even unbalanced and nonlinear loads. The algorithm is based on a carrier-based PWM. Nevertheless, it can generate the maximum output voltage amplitudes attainable under linear modulation, such as space-vector modulation. Furthermore, this technique can be implemented with a very simple algorithm, and hence can be processed very quickly. A control loop for balancing the voltages on the dc-link capacitors is also proposed. This balancing strategy is designed so that it does not increase the switching frequencies of the devices when it is applied to the converter. The proposed modulation technique is verified by simulation and experiment.
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U2 - 10.1109/IECON.2005.1569050
DO - 10.1109/IECON.2005.1569050
M3 - Conference contribution
AN - SCOPUS:33749685782
SN - 0780392523
SN - 9780780392526
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 1054
EP - 1059
BT - IECON 2005
T2 - IECON 2005: 31st Annual Conference of IEEE Industrial Electronics Society
Y2 - 6 November 2005 through 10 November 2005
ER -