Efficient simulation of switched networks using reduced unification matrix

Wu, Huang-Jin; Feng, Wu‐Shiung

doi:10.1109/63.761692

Cited by 16 publications

References 31 publications

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A method for the assessment of the optimal parameter of discrete-time switch model

Razzaghi¹,

Foti²,

Paolone³

et al. 2014

Electric Power Systems Research

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a b s t r a c tThis paper proposes a novel method for the optimal parameter selection of the discrete-time switch model used in circuit solvers that adopt the fixed admittance matrix nodal method (FAMNM) approach. As known, FAMNM-based circuit solvers allow to reach efficient computation times, in particular for realtime simulation applications, since they do not need the inversion of the circuit nodal admittance matrix. However, these solvers need to optimally tune the so-called discrete switch conductance, since this parameter might largely affect the simulations accuracy. Within this context, we propose a method for the determination of the discrete-time switch conductance which is obtained by minimizing the distance between the eigenvalues of the original circuit's nodal admittance matrix with those associated with the circuit including the discrete-time switches. The method is proven to provide values of the discrete-time switch conductance that maximize the simulation accuracy and minimize the losses on this artificially introduced parameter. Additionally, the proposed method avoids the use of trial-and-error process typically required when discrete-time switch conductances need to be addressed in FAMNM approach. The performances of the proposed method are demonstrated for circuits with single and multiple switches in which passive RLC elements and transmission lines are both considered.

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A method for the assessment of the optimal parameter of discrete-time switch model

Razzaghi¹,

Foti²,

Paolone³

et al. 2014

Electric Power Systems Research

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FPGA based real time electro-thermal modeling of power electronic converters

Herrera

Yao

et al. 2013

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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In this paper, two methods are proposed and analyzed for detailed modeling of power electronic devices and converters in real time using an FPGA. First, a Thevenin equivalent switch representation is enhanced to model the on characteristics of switching devices. Using this approach, an algorithm for real time electro-thermal modeling of power converters is proposed and an example is illustrated. The accuracy of this model is validated with experimental results performed using a 4.5 kW boost converter. This method is an efficient way to perform real time electro-thermal simulations of power electronic circuits operating at high switching frequencies.

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