Phase-domain transmission circuit model for electromagnetic transient analysis-representation of characteristic impedance matrix by a passive network

Nguyen, Tien; Nguyen, Van Liem; Nguyen, Blake

doi:10.1109/pes.2010.5589574

Cited by 3 publications

(5 citation statements)

References 19 publications

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“…The interconnected RLC circuits which are synthesized are an inherently stable network. As indicated in the paper [6], very high accuracy in addition to the stability has been achieved in the synthesis.…”

Section: Discussionmentioning

confidence: 82%

“…The stability is achieved without any need for approximation as the real part of the admittance matrix of the synthesized network which comprises only passive circuit elements is always positive definite. The stability criterion in relation to the synthesis of characteristic admittance matrix function [6] is, therefore, automatically fulfilled. The synthesized network representing the characteristic admittance matrix (or impedance) is incorporated in the transmission line or underground cable model expressed in the final form in the discrete-time domain in a straightforward manner, through the application of the trapezoidal rule of integration to individual inductors and capacitors in the network.…”

Section: Linesmentioning

confidence: 99%

“…Expressed in the frequency-domain, the scattering equations in the phase-variable form for a transmission line or underground cable connected between nodes k and j are given in [6]:…”

Section: A Scattering Equations In the Frequency-domainmentioning

confidence: 99%

“…The modelling and formulation developed and presented in [6] have been implemented in software based on which switching transients study related to the energisation of the 220 kV Nhabe -Phumy transmission line in the system of Fig. 9 is carried out.…”

Section: B Transmission Line Energisationmentioning

confidence: 99%

“…9 is carried out. This configuration and basic conductor data are those in [6]. The fault level of the source in Fig.…”

Section: B Transmission Line Energisationmentioning

confidence: 99%

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Recognition and simulation of electromagnetic transients in power systems of Southern Vietnam

Nguyen

Quyen

2012

2012 10th International Power &Amp; Energy Conference (IPEC)

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This paper presents a research of electromagnetic transients in power systems based on the three issues: identification of voltage transient disturbances, analysis of power system transient, and modeling of distributed-parameter transmission lines. The first issue includes (a) recognizing the presence of power quality disturbances in supply voltage and (b) classifying any existing deviations from a particular type. Various techniques using artificial neural networks and Fuzzy associative memories, Neuro-Fuzzy systems based on Wavelet transform are used to identify power quality disturbances. The second issue is to analyze the power system transients using the wavelets technique as opposed to the trapezoidal rule method. A novel developed algorithm has the following properties: 1) it is time-domain working, so that circuit nonlinearity can be handled and numerical accuracy can be well controlled, unlike the frequencydomain method where numerical error may become uncontrollable during the inverse L a p l a c e transform; 2) the wavelets property of localization in both time and frequency domains makes a uniform approximation possible, which is generally not achieved in time-stepping methods. The last issue is to model a transmission line based on passive network synthesis for representing the nonlinear frequency dependence of the characteristic impedance matrix function. The synthesized passive network of interconnected RLC elements preserves at any frequency the inherent stability property of this matrix function for any power transmission circuits. The network parameters are identified using the constrained optimization by which the synthesized network response is matched with the actual response derived from the characteristic impedance matrix. With the trapezoidal rule of numerical integration applied to individual elements of the synthesized network, discrete time-domain recursive sequences are derived, and then included in the overall transmission circuit model. The network synthesis procedure developed is applied to a representative transmission line, and comparative studies indicate high accuracy being achieved. The research is then applied and validated to a southern of Vietnam power system in study.

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Section: Discussionmentioning

confidence: 82%

Section: Linesmentioning

confidence: 99%

“…Expressed in the frequency-domain, the scattering equations in the phase-variable form for a transmission line or underground cable connected between nodes k and j are given in [6]:…”

Section: A Scattering Equations In the Frequency-domainmentioning

confidence: 99%

Section: B Transmission Line Energisationmentioning

confidence: 99%

“…9 is carried out. This configuration and basic conductor data are those in [6]. The fault level of the source in Fig.…”

Section: B Transmission Line Energisationmentioning

confidence: 99%

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