Measurement-based parameter identification of non-linear polynomial frequency domain model of single-phase four diode bridge rectifier

Mirz, Markus; Uhl, Robert; Vandeplas, Tom; Barford, Lee; Monti, Antonello

doi:10.1109/i2mtc.2017.7969758

Cited by 7 publications

(1 citation statement)

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“…Finally, frequency-domain Volterra models represent the straightforward extension of the conventional frequency response function (FRF) to nonlinear time invariant (NTI) systems. This approach can be employed to model power electronics converters [23], but the main drawback is that its complexity rapidly increases with the number of input harmonics and the considered nonlinearity degree. The models can be effectively adapted to power systems applications by introducing the so-called quasi-sinusoidal simplification, thus exploiting the fact that electrical signals are made of a strong fundamental component and harmonics that are much smaller in magnitude.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Domain Nonlinear Modeling Approaches for Power Systems Components—A Comparison

et al. 2020

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Harmonic simulations play a key role in studying and predicting the impact of nonlinear devices on the power quality level of distribution grids. A frequency-domain approach allows higher computational efficiency, which has key importance as long as complex networks have to be studied. However, this requires proper frequency-domain behavioral models able to represent the nonlinear voltage–current relationship characterizing these devices. The Frequency Transfer Matrix (FTM) method is one of the most widespread frequency domain modeling approaches for power system applications. However, others suitable techniques have been developed in the last years, in particular the X-parameters approach, which comes from radiofrequency and microwave applications, and the simplified Volterra models under quasi-sinusoidal conditions, that have been specifically tailored for power system devices. In this paper FTM, X-parameters and simplified Volterra approaches are compared in representing the nonlinear voltage –current relationship of a bridge rectifier feeding an ohmic-capacitive dc load. Results show that the X-parameters model reaches good accuracy, which is slightly better than that achieved by the FTM and simplified Volterra models, but with a considerably larger set of coefficients. Simplified Volterra models under quasi-sinusoidal conditions allows an effective trade-off between accuracy and complexity.

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Section: Introductionmentioning

confidence: 99%