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| Content Provider | IET Digital Library |
|---|---|
| Author | Almenweer, Reem A. Yixin, Su Xixiu, Wu |
| Abstract | Very fast transient over voltage (VFTO) is a unique electromagnetic transient phenomenon occurring in Gas Insulated Substation (GIS), which determines the insulation level of the GIS (above 330 kV). Unfortunately, up to the present, there is no standard VFTO waveform to test the high voltage equipment to ensure the safety of power grid. For this reason, this paper focuses on obtaining the standard VFTO waveform through finding a method to fit the curve of VFTO. Hence, a UHV disconnector operation experiment of GIS was carried out on the UHV GIS test platform. The representative waveform of VFTO generated by a single SF6 gas discharge was extracted from the measured data. Furthermore, The Fast Fourier Transformer is applied to analyze the frequency features of VFTO. As one of the switchgear operation voltage, VFTO can be concluded to be a superposition of the power-frequency waveform with the non-periodic impulse waveform. Thus, it is found that The Squares Method is convenient for fitting the expression of VFTO according to its transient characteristics. Then the standard VFTO waveform can be obtained from the fitting expression, which coincides well with the measured waveform. The simulation results using ATP-EMTP software are compared with the calculation results and the measured results. |
| Starting Page | 2053 |
| Ending Page | 2057 |
| 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.2018.8753 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-24 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-No Derivs License (http://creativecommons.org/licenses/by-nd/3.0/) |
| Subject Keyword | ATP-EMTP Software Curve Fitting Discharges (electric) Electromagnetic Transient Phenomenon EMTP Fitting Method Gas Insulated Switchgear GIS Insulation Level High-voltage Equipment Inorganic Insulation Interpolation And Function Approximation Mathematical Expression Non-periodic Impulse Waveform Numerical Analysis Overvoltage Protection Power Grid Power Grid Safety Power–frequency Waveform SF6 Gas Discharge Standard VFTO Waveform Switch Transients UHV Disconnector Operation UHV GIS Test Platform VFTO Impulse Test |
| Content Type | Text |
| Resource Type | Article |
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