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| Content Provider | IET Digital Library |
|---|---|
| Author | He, Shuang Liu, Yuhao Zhao, Zheng Li, Chenjie Wang, Yifeng Ren, Ziyuan Qian, Hai Deng, Jun |
| Abstract | An accurate computational model of transformer winding for potential distribution analysis under impulse voltage is very important for the design of transformer inter-turn insulation, especially for large capacity transformers such as ultrahigh-voltage DC (UHVDC) converter transformer. Quite a lot of equivalent circuit models for transformer winding have been proposed assuming that the influence of magnetic core is negligible at frequencies >10 kHz, which is not always valid in practice. Lightning impulse or very fast transient overvoltage waveforms usually contain abundant frequency components >10 kHz. To obtain a more accurate model, here, a new equivalent circuit representation of UHVDC converter transformer winding is given taking into consideration of comprehensive frequency characteristic of core lamination stack. Taking account of the skin effect, the equivalent relative permeability of lamination stack are investigated and implemented in the calculation of frequency-dependent parameters such as resistance, self-inductance, and mutual inductance. The equivalent circuit model is realised in ATP and the surge propagation process in the winding; the winding potential distribution under transient overvoltage is studied carefully. The representation of the iron core loss in the equivalent circuit is discussed. The new proposed model may provide more accurate winding potential distribution prediction for transformer inter-turn insulation design. |
| Starting Page | 2921 |
| Ending Page | 2925 |
| Page Count | 5 |
| 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.2018.8448 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-29 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
| Subject Keyword | Abundant Frequency Component Accurate Computational Model Accurate Winding Potential Distribution Prediction ATP Comprehensive Frequency Characteristic Core Lamination Stack Equivalent Circuit Equivalent Circuit Representation Equivalent Relative Permeability Frequency 10.0 KHz Frequency-dependent Parameter Impulse Voltage Inductance Iron Core Loss Laminations Large Capacity Transformer Magnetic Core Mutual Inductance New Equivalent Circuit Model Overvoltage Photonic Integration Potential Distribution Analysis Power Transformer Insulation Self-inductance Skin Effect Surge Propagation Investigation Surge Propagation Process Transformer And Reactors Transformer Inter-turn Insulation Design Transformer Windings Transient Overvoltage UHVDC Converter Transformer Winding Ultrahigh-voltage DC Converter Transformer |
| Content Type | Text |
| Resource Type | Article |
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