Three-level neutral point clamped PWM inverters overcome some limitations of two-level inverters in medium voltage applications, leading to lower device ratings and greater efficiency. However, they are burdened by an intrinsic drawback of the neutral point clamped structure, which causes, under some operating conditions, a voltage imbalance of the DC link capacitors. In this paper, such an issue is faced on a system driven by a dual-carrier PWM strategy through a simple hysteretic control. The proposed technique features a very low computational burden and does not need additional power circuits or sensors. It is first presented theoretically, then its performance is evaluated through simulations.

Foti S., Khan H.H., Testa A., Di Tommaso A.O., Miceli R., Nevoloso C. (2023). A simple DC-Link Voltage Balancing Strategy for NPC Three-level Inverters. In 2023 25th European Conference on Power Electronics and Applications, EPE 2023 ECCE Europe. Institute of Electrical and Electronics Engineers Inc. [10.23919/EPE23ECCEEurope58414.2023.10264621].

A simple DC-Link Voltage Balancing Strategy for NPC Three-level Inverters

Di Tommaso A. O.;Miceli R.;Nevoloso C.
2023-09-04

Abstract

Three-level neutral point clamped PWM inverters overcome some limitations of two-level inverters in medium voltage applications, leading to lower device ratings and greater efficiency. However, they are burdened by an intrinsic drawback of the neutral point clamped structure, which causes, under some operating conditions, a voltage imbalance of the DC link capacitors. In this paper, such an issue is faced on a system driven by a dual-carrier PWM strategy through a simple hysteretic control. The proposed technique features a very low computational burden and does not need additional power circuits or sensors. It is first presented theoretically, then its performance is evaluated through simulations.
4-set-2023
978-9-0758-1541-2
Foti S., Khan H.H., Testa A., Di Tommaso A.O., Miceli R., Nevoloso C. (2023). A simple DC-Link Voltage Balancing Strategy for NPC Three-level Inverters. In 2023 25th European Conference on Power Electronics and Applications, EPE 2023 ECCE Europe. Institute of Electrical and Electronics Engineers Inc. [10.23919/EPE23ECCEEurope58414.2023.10264621].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/624517
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