Permata, Diah (2015) Modeling Method of Fast Transient for Unsymmetrical Stray Capacitance to Ground. Modeling Method of Fast Transient for Unsymmetrical Stray Capacitance to Ground, 10 (S1). S28-S33. ISSN 1931-4981

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Transient characteristic of power system apparatus in a high-frequency region should be modeled with stray capacitors. Pi-type circuit is commonly used to represent the stray capacitors between terminals and those to the ground. A modeling method for the pi-type circuit with unsymmetrical stray capacitances to ground is proposed in this paper. To obtain the unsymmetrical stray capacitances to ground, a couple of differential-mode measurements are interchangeably applied. The parameters of the pi-type circuit can be determined by the measurements with a common-mode measurement. A nonlinear least-squares method is used to estimate the capacitances. The method is applied to compose an equivalent circuit of a miniature circuit breaker (MCB), which has unsymmetrical stray capacitances to ground. The application is not only for the MCB but also for a scaled model of a high-voltage circuit breaker. A gas-filled arrester is used as a voltage sensor for the test because the voltage across the stray capacitor cannot be directly measured due to the input capacitance of a voltage probe. A transient response of the MCB with the gas-filled arresters is numerically simulated to show the usefulness of the equivalent circuit.

Item Type: Article
Uncontrolled Keywords: stray capacitance, unsymmetrical impedance, nonlinear fitting, miniature circuit breaker, gas-filled arrester (GA), flashover
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Fakultas Teknik (FT) > Prodi Teknik Elektro
Depositing User: Dr. Eng Diah Permata
Date Deposited: 11 Nov 2016 01:08
Last Modified: 11 Nov 2016 06:21

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