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Title:
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Neutral-point voltage dynamic model of three-level NPC inverter for reactive load
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Author:
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Maheshwari, RamKrishan; Munk-Nielsen, Stig; Busquets Monge, Sergio
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GREP - Grup de Recerca en Electrònica de Potència |
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Abstract:
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A three-level neutral-point-c1amped inverter needs a
controller for the neutral-point voltage. Typically, the controller
design is based on a dynamic model. The dynamic model of the
neutral-point voltage depends on the pulse width modulation
technique used for the inverter. A pulse width modulation
strategy which allows modeling the neutral-point voltage as a
first-order continuous function is proposed in this paper. The
new model shows that the neutral-point current is proportional
to the reactive power drawn from the inverter. Since the model
is a first-order model, a simple proportional controller is used in
this paper to control the neutral-point voltage. Experimental
results verifying the proposed modulation strategy and the
controller are also presented in this paper. |
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Subject(s):
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-Àrees temàtiques de la UPC::Energies::Energia elèctrica
-Electric controllers
-Reguladors elèctrics |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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