Publicação: A comparative analysis of FBD, PQ and CPT current decompositions - Part II: Three-phase four-wire systems
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This paper investigates the major similarities and discrepancies among three important current decompositions proposed for the interpretation of unbalanced and/or non linear three-phase four-wire power circuits. The considered approaches were the so-called FBD Theory, the pq-Theory and the CPT. Although the methods are based on different concepts, the results obtained under ideal conditions (sinusoidal and balanced signals) are very similar. The main differences appear in the presence of unbalanced and non linear load conditions. It will be demonstrated and discussed how the choice of the voltage referential and the return conductor impedance can influence in the resulting current components, as well as, the way of interpreting a power circuit with return conductor. Under linear unbalanced conditions, both FBD and pq-Theory suggest that the some current components contain a third-order harmonic. Besides, neither pq-Theory nor FBD method are able to provide accurate information for reactive current under unbalanced and distorted conditions, what can be done by means of the CPT. © 2009 IEEE.
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Current decomposition, FBD-theory, Harmonics, Homo-variables, Power theory, Pq-theory, Balanced signals, Comparative analysis, Current component, Non-linear, Nonlinear load, Power circuit, Reactive currents, Third-order, Three phase four wire systems, Three-phase four-wire, Unbalanced condition, Computational simulation, Instrumentation technologies, Power conditioning, Power measurement, Three-phase three-wire, Wave forms, Charge trapping, Electric converters, Electric current measurement, Harmonic analysis, Wire, Decomposition
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Inglês
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2009 IEEE Bucharest PowerTech: Innovative Ideas Toward the Electrical Grid of the Future.
