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Clarifications on the Behavior of Alternative Gases to $SF_{6}$ in Divergent Electric Field Distributions Under AC Voltage
| Content Provider | MDPI |
|---|---|
| Author | Nechmi, Houssem Michelarakis, Michail Haddad, Abderrahmane Wilson, Gordon |
| Copyright Year | 2021 |
| Description | Negative and positive partial discharge inception voltages and breakdown measurements are reported in a needle-plane electrode system as a function of pressure under AC voltage for natural gases (N2, CO2, and O2/CO2), pure Novec TM gases (C4F7N and C5F10O) and Novec TM in different natural gas admixtures. For compressed 4% C4F7N–96% CO2 and 6% C5F10O–12% O2–82% CO2 gas mixtures, the positive-streamer mode is identified as the breakdown mechanism. Breakdown and negative partial discharge inception voltages of 6% C5F10O–12% O2–82% CO2 are higher than those of 4% C4F7N–96% CO2. At 8.8 bar abs, the breakdown voltage of 6% C5F10O–12% O2–82% CO2 is equal to that of 12.77% O2–87.23% CO2 (buffer gas). Synergism in negative partial discharge inception voltage/electric field fits with the mean value and the sum of each partial pressure individually component for a 20% C4F7N–80% CO2 and 6% C5F10O–12% O2–82% CO2, respectively. In 9% C4F7N–91% CO2, the comparison of partial discharge inception electric fields is Emax (CO2) = Emax(C4F7N), and Emax (12.77% O2–87.23% CO2) = Emax(C5F10O) in 19% C5F10O–81%(12.77% O2–87.23% CO2). Polarity reversal occurs under AC voltage when the breakdown polarity changes from negative to positive cycle. Polarity reversal electric field EPR was quantified. Fitting results show that EPR (CO2) = EPR(9% C4F7N–91% CO2) and EPR(SF6) = EPR (22% C4F7N–78% CO2). EPR (4% C4F7N–96% CO2) = EPR (12.77% O2–87.23% CO2) and EPR (6% C5F10O–12% O2–82% CO2) PR (4% C4F7N–96% CO2) PR (CO2). |
| Starting Page | 1065 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en14041065 |
| Journal | Energies |
| Issue Number | 4 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-02-18 |
| Access Restriction | Open |
| Subject Keyword | Energies Energy and Fuel Technology O2/co2 C4f7n C4f7n/co2 C5f10o C5f10o/o2/co2 Gaseous Breakdown Divergent Electric Fields Partial Discharge Inception Voltage/electric Field Polarity Reversal Pressure/electric Field |
| Content Type | Text |
| Resource Type | Article |
