Evaluation of Methodology for Lightning Impulse Voltage Distribution over High-Voltage Windings of Inductive Voltage Transformers
| Autor: | Igor Žiger, Ana Drandić, Viktor Milardić, Bojan Trkulja |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Computer science 020209 energy Energy Engineering and Power Technology 02 engineering and technology Impulse (physics) 01 natural sciences Capacitance law.invention law lightning impulse testing core influence voltage transformers numerical simulation adaptive cross-approximation 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering Transformer Engineering (miscellaneous) 010302 applied physics Renewable Energy Sustainability and the Environment High voltage Inductance Magnetic core Electromagnetic coil Equivalent circuit Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 5144, p 5144 (2021) Energies; Volume 14; Issue 16; Pages: 5144 |
| Popis: | Knowledge of lightning impulse (LI) voltage distribution over transformer windings during the design stage of the transformer is very important. Specific design differences in inductive voltage transformers make the transient analysis approach different to the approach to the power transformers. In this paper, a methodology for acquiring lightning impulse voltage distribution over high-voltage (HV) winding of inductive voltage transformers is presented and evaluated. Resistance, inductance, and capacitance matrices are calculated using the integral and boundary element methods (BEM) approach. Additionally, in order to improve the capacitance matrix solver, adaptive cross approximation (ACA) is applied. These parameters are then used to solve the equivalent circuit model in time domain. In order to evaluate the methodology, an experimental and numerical investigation of the layer discretisation, iron core influence, and accuracy of the proposed methodology is performed. The comparison of numerical results with measurements confirms the validity of the methodology. |
| Databáze: | OpenAIRE |
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