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Content Provider | IET Digital Library |
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Author | Fei, Yan Zijian, Wang Ting, Yin |
Abstract | There are no reliable measures for identifying self-healing failures in capacitors. Therefore, the high-voltage self-healing capacitor have not been widely adopted in power systems yet. It is urgent to study new scheme to protect the self-healing failure of high-voltage capacitors. Simulations tests and experiments were conducted to further assess self-healing of capacitors. The broken-down capacitor samples were connected into the test circuit with a vacuum contactor, and recorded the experimental phenomena and current wave-forms. The impedance changes were measured before and after the test, and calculated the active power dissipated by the sample. The test results showed that the insulation of self-healing failure sample temporarily restores or deteriorates rapidly. No visual defects are observed in the case of temporarily restored insulation, and the capacitor can continue to operate. However, if the insulation was deteriorated, unwanted gas generation, consisting of 85% H2, potentially lead to smoke and fire. Our study showed no obvious correlation between impedance change and occurring self-healing phenomena. It is found that the process consumes a lot of active power in case of deterioration. Therefore, a method of capacitor self-healing failure protection based on active power variation was proposed. |
Starting Page | 3371 |
Ending Page | 3377 |
Page Count | 7 |
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.2018.8775 |
Journal | The Journal of Engineering |
Publisher | The Institution of Engineering and Technology |
Publisher Date | 2018-11-20 |
Access Restriction | Open |
Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
Subject Keyword | Capacitor Capacitor Samples Capacitor Voltage Level Failure Analysis High-voltage Capacitor High-voltage Self-healing Capacitor Impedance Change Insulation And Insulating Coatings Insulation Testing Life Testing Medium-voltage Capacitor Occurring Self-healing Phenomena Power Capacitor Pressure Protection Measure Protection Method Reliability Self-healing Failure Characteristic Self-healing Failure Protection Self-healing Failure Sample Switch Vacuum Contactors |
Content Type | Text |
Resource Type | Article |
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