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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Duo Hao, Zhiguo Hui, Zijia Wang, Ke Ding, Guocheng |
| Abstract | When an unloaded converter transformer is being energised, large inrush current may flow in the voltage jump side depending upon the residual flux in the core and the closing voltage angle of the power grid due to the hysteresis characteristics of the core, causing false operation of protective relays and bringing many adverse effects to the grid and primary electrical devices. Based on the analysis of the elimination of inrush current using controlled switching, the phase-to-phase electromagnetic coupling relationship which would be influenced by the core structure and winding connection mode was taken into account when considering the controlled switching strategy of three-phase transformer. With the analysis of core residual flux after de-energisation and the dynamic magnetisation of core during the energisation, a controlled switching strategy for inrush current restraining when energising converter transformer is presented in this study. Only the current arc quenching sequence during circuit breaker opening and the voltage extinguishing phase angle are asked for this strategy, and the simulation by electromagnetic transients programme and the experiment results indicate that this strategy could restrain the inrush transient efficiently. |
| Starting Page | 2391 |
| Ending Page | 2396 |
| Page Count | 6 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 16, Mar (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/conferences/cn-adc-2018 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8694 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-26 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
| Subject Keyword | Circuit Breaker Control of Electric Power System Controlled Switching Strategy Converter Transformer Energising Core Residual Flux Core Structure Current Arc Quenching Sequence Electromagnetic Coupling Electromagnetic Transients Programme EMTP Inrush Current Restraining Inrush Transient Magnetisation Phase-to-phase Electromagnetic Coupling Relationship Power Grid Power System Control Power System Protection Power Transformer Power Transformer Protection Relay Protection Switch Three-phase Transformer Transformer And Reactors Transients Voltage Extinguishing Phase Angle Voltage Jump Side Winding Connection Mode |
| Content Type | Text |
| Resource Type | Article |
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