Single-Carrier Phase-Disposition PWM Techniques for Multiple Interleaved Voltage-Source Converter Legs
| Autor: | Salvador Ceballos, Georgios Konstantinou, Josep Pou, Gabriel J. Capella |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. TIEG-P - Terrassa Industrial Electronics Group -Power, School of Electrical and Electronic Engineering, Electrical Power Systems Integration Lab, Energy Research Institute @ NTU (ERI@N) |
| Rok vydání: | 2018 |
| Předmět: |
multilevel converters
Computer science 02 engineering and technology Electric inductors Inductor Pulse width modulation Harmonic analysis Interleaving Multilevel Converters (MMC) 0202 electrical engineering electronic engineering information engineering Electronic engineering Inductors Convertidors de corrent elèctric Voltage source Electrical and Electronic Engineering Locomoció Enginyeria elèctrica [Àrees temàtiques de la UPC] Sorting 020208 electrical & electronic engineering Anàlisi harmònica Feedback loop Electric current converters voltage source converters Control and Systems Engineering parallel legs Electrical and electronic engineering [Engineering] multilevel waveforms Power system harmonics Harmonic Legged locomotion 020201 artificial intelligence & image processing Inductors elèctrics Switches Locomotion Pulse-width modulation |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 1557-9948 0278-0046 |
| Popis: | Interleaved converter legs are typically modulated with individual carriers per leg and phase-shifted PWM (PS-PWM) as it facilitates current balancing amongst the legs. Phase-disposition PWM (PD-PWM), despite the better harmonic performance, cannot be directly used due to the resulting current imbalance that may damage the converter. This paper addresses the current sharing issue and proposes a single-carrier PD-PWM technique for multiple leg two-level converters based on a hierarchy scheme derived from current sorting algorithms. An extension of the proposed algorithm through a switching state feedback loop, limiting the average switching frequency, is also developed. In both cases, the load current is shared amongst the legs and the high-quality of the output voltages and currents is maintained while the circulating currents amongst the converter legs are kept to a minimum. Simulation results demonstrate the method for multiple interleaved legs as well as its current sharing capabilities for high-power applications. Experimental results from a low-power laboratory prototype validate the operation of the proposed approach. |
| Databáze: | OpenAIRE |
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