Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage
The total current of dielectrics under DC voltage consists of relaxation current and conduction current, which contains the information about the relaxation polarization and conduction. The time-domain spectrum (TDS) is an effective method to study the dielectric properties of insulating dielectrics...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/21/8227 |
| _version_ | 1797468365322715136 |
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| author | Yucui Xue Wenmin Guo Yunlong Sun Zhonghua Li Yongsen Han |
| author_facet | Yucui Xue Wenmin Guo Yunlong Sun Zhonghua Li Yongsen Han |
| author_sort | Yucui Xue |
| collection | DOAJ |
| description | The total current of dielectrics under DC voltage consists of relaxation current and conduction current, which contains the information about the relaxation polarization and conduction. The time-domain spectrum (TDS) is an effective method to study the dielectric properties of insulating dielectrics. In this paper, the TDS method is also used to study the dielectric properties of the compressed inorganic hexagonal boron nitride (BN) and magnesium oxide (MgO) insulating powders. It is interestingly found that these inorganic insulating powders shows an abnormal TDS, where the current decreases monotonically to a certain level at first and then increases with time while in normal TDS the current decreases monotonically with time and finally reaches a steady value which is conduction current. The experiments verify that the abnormal phenomenon is attributed to the moisture absorption of powders during the testing process, which causes an increase in conductivity and leads to the increasing current at the end of testing time. The insulating powder cannot be regarded as a time-invariant system during the measurement, and the time-varying characteristic is mainly manifested in conduction. A time-domain least squares fitting method is presented and is effective to eliminate the deviation from normal TDS. The results of this paper provide a reference for dealing with abnormal TDS. |
| first_indexed | 2024-03-09T19:06:23Z |
| format | Article |
| id | doaj.art-65c8edbba7394bae8ff995031bd2c92b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T19:06:23Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-65c8edbba7394bae8ff995031bd2c92b2023-11-24T04:33:50ZengMDPI AGEnergies1996-10732022-11-011521822710.3390/en15218227Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC VoltageYucui Xue0Wenmin Guo1Yunlong Sun2Zhonghua Li3Yongsen Han4Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaThe total current of dielectrics under DC voltage consists of relaxation current and conduction current, which contains the information about the relaxation polarization and conduction. The time-domain spectrum (TDS) is an effective method to study the dielectric properties of insulating dielectrics. In this paper, the TDS method is also used to study the dielectric properties of the compressed inorganic hexagonal boron nitride (BN) and magnesium oxide (MgO) insulating powders. It is interestingly found that these inorganic insulating powders shows an abnormal TDS, where the current decreases monotonically to a certain level at first and then increases with time while in normal TDS the current decreases monotonically with time and finally reaches a steady value which is conduction current. The experiments verify that the abnormal phenomenon is attributed to the moisture absorption of powders during the testing process, which causes an increase in conductivity and leads to the increasing current at the end of testing time. The insulating powder cannot be regarded as a time-invariant system during the measurement, and the time-varying characteristic is mainly manifested in conduction. A time-domain least squares fitting method is presented and is effective to eliminate the deviation from normal TDS. The results of this paper provide a reference for dealing with abnormal TDS.https://www.mdpi.com/1996-1073/15/21/8227abnormal time-domain current spectruminorganic insulating powderpolarizationconductivityleast squares fitting |
| spellingShingle | Yucui Xue Wenmin Guo Yunlong Sun Zhonghua Li Yongsen Han Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage Energies abnormal time-domain current spectrum inorganic insulating powder polarization conductivity least squares fitting |
| title | Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage |
| title_full | Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage |
| title_fullStr | Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage |
| title_full_unstemmed | Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage |
| title_short | Abnormal Time-Domain Current Spectrum of Inorganic Insulating Powder under DC Voltage |
| title_sort | abnormal time domain current spectrum of inorganic insulating powder under dc voltage |
| topic | abnormal time-domain current spectrum inorganic insulating powder polarization conductivity least squares fitting |
| url | https://www.mdpi.com/1996-1073/15/21/8227 |
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