A Norton equivalent model for nonlinear loads

Abdelkader, Sobhy M.; Abdel-Rahman, Mansour H.; Osman, Mohamed

doi:10.1109/lescpe.2001.941628

Cited by 23 publications

(26 citation statements)

References 2 publications

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“…4. Similarly, (5) and (6) are derived for the case when the shunt impedance is applied on the negative side of the LISN. Note that when the shunt is applied, the EMI voltage changes at the LISN.…”

Section: Fig 3 Nominal Case For Model Extractionmentioning

confidence: 99%

“…As expected, system level simulations with physics-based models of semiconductor devices are even more complex and may be impractical as systems grow larger. In recent years, behavioral models have been shown to provide a promising alternative [3][4][5][6][7][8][9][10][11][12]. These models usually have a simple topology and can be used to study system-level EMI behavior.…”

Section: Introductionmentioning

confidence: 99%

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EMI modeling of half-bridge inverter using a generalized terminal model

Bishnoi

Baisden

Mattavelli

et al. 2011

2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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A generalized terminal model has been proposed to predict the conducted electromagnetic interference (EMI) from a boost converter. The results of conducted emissions have shown a good agreement up to 50 MHz. The same technique was also successfully applied to extract a terminal model of buck converter. This paper extends the generalized terminal modeling approach to a larger class of power converters by attempting to model a dc-ac converter from the dc terminal side. Modeling the terminal behavior of an ac system is more challenging than it is for dc-dc converters because of the timevarying converter operating point. The proposed technique is applied to a single-phase half-bridge inverter to show its versatility in modeling conducted emissions from ac systems. Measured and predicted conducted emissions from a half-bridge inverter are in a good agreement within 6 dB up to 30 MHz.

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Section: Fig 3 Nominal Case For Model Extractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

EMI modeling of half-bridge inverter using a generalized terminal model

Bishnoi

Baisden

Mattavelli

et al. 2011

2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

View full text Add to dashboard Cite

show abstract

“…Some have applied this circuit to power system and load flow analysis [55][56][57] and common nonlinear loads in power electronics [58][59]. Others have looked into simulation and simplified solving of non-linear systems [60][61] and many applications outside of power electronics or electrical engineering [62][63].…”

Section: Equivalent Circuitmentioning

confidence: 99%

Generalized Terminal Modeling of Electromagnetic Interference

Baisden

Boroyevich

Wang

2010

IEEE Trans. on Ind. Applicat.

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Terminal models have been used for various power electronic applications. In this work a two-and three-terminal black box model is proposed for electro-magnetic interference (EMI) characterization. The modeling procedure starts with a time-variant system at a particular operating condition, which can be a converter, set of converters, sub-system or collection of components. A unique, linear equivalent circuit is created for applications in the frequency domain. Impedances and current / voltage sources define the noise throughout the entire EMI frequency spectrum. All parameters needed to create the model are clearly defined to ensure convergence and maximize accuracy.The model is then used to predict the attenuation caused by a filter with increased accuracy over small signal insertion gain measurements performed with network analyzers. Knowledge of EMI filters interactions with the converter allows for advanced techniques and design constraints to optimize the filter for size, weight, and cost. Additionally, the model is also demonstrated when the operating point of the system does not remain constant, as with AC power systems.Modeling of a varying operating point requires information of all the operating conditions for a complete and accurate model. However, the data collection and processing quickly become unmanageable due to the large amounts of data needed. Therefore, simplification techniques are used to reduce the complexity of the model while maintaining accuracy throughout the frequency spectrum.The modeling approach is verified for linear and power electronic networks including: a dcdc boost converter, phase-leg module, and a simulated dc-ac inverter. The accuracy of the model is confirmed up to 100 MHz in simulation and at least 50 MHz for experimental validation.

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“…References [9]- [12] demonstrate the representation of the power system loads and extended networks. Nonlinear loads are commonly represented by ideal current source at their characteristic frequencies.…”

Section: Harmonic Modelingmentioning

confidence: 99%

“…1. In [12], a new model for the distribution system, including nonlinear loads, is introduced. The model is based on measurements, where current and voltage measurements at two different operating conditions are used to derive an equivalent Norton model for the distribution system…”

Section: Harmonic Modelingmentioning

confidence: 99%

LC Compensators Based on Transmission Loss Minimization for Nonlinear Loads

Zobaa

Aziz

2004

IEEE Trans. Power Delivery

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Abstract-This paper presents a method employing the penalty function search algorithm to determine the LC compensator value for the optimal power factor correction in nonsinusoidal systems. The objective of the proposed method is to minimize the transmission loss while the power factor and efficiency are taken as constraints and utilized in order to solve the multiobjective optimization problem by transforming it into a single objective one. Examples show that the load nonlinearity can have a significant impact on optimal compensator sizes.

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A Norton equivalent model for nonlinear loads

Cited by 23 publications

References 2 publications

EMI modeling of half-bridge inverter using a generalized terminal model

EMI modeling of half-bridge inverter using a generalized terminal model

Generalized Terminal Modeling of Electromagnetic Interference

LC Compensators Based on Transmission Loss Minimization for Nonlinear Loads

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