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Title:
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Capacitor voltage balancing in a three-level-converter-based energy storage system
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Author:
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Burusteta, Sendoa; Pou Félix, Josep; Ceballos Recio, Salvador; Marino, Iker; Anzola, Jose Angel; Agelidis, Vassilios
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. TIEG - Terrassa Industrial Electronics Group |
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Abstract:
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This paper discusses a grid-connected energy storage system based on two three-level (3L) converters: a DC-DC one and a neutral-point-clamped inverter. When compared to a system using standard two-level converters, the main advantages of this system are: higher efficiency, smaller reactive components allowing for a system cost reduction and its capability to handle higher voltage and power. A modulation strategy for the DC-DC converter which includes the neutral-point voltage balance control is proposed. The capability of the DC-DC converter to cancel the inverter's neutral-point voltage oscillations is also analyzed. Results are presented to illustrate the extended operation area without imbalances. Design guidelines to size the DC-link capacitors are given for a practical implementation. Experimental results taken from a 10 kW 3L DC-DC converter prototype are provided to show the capability of this particular converter to keep neutral-point voltage balance. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència
-Inductance
-Modulation (Electronics)
-Energy storage
-Electric current converters
-Energy storage
-Renewable energy systems
-Multilevel converters
-Modulation strategy
-Converter control
-MULTILEVEL CONVERTERS
-INVERTER
-Inductància
-Modulació (Electrònica)
-Energia--Emmagatzematge
-Convertidors de corrent elèctric |
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Rights:
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Document type:
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Article - Published version
Article |
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