Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages
Insulation resistance is a vital factor in dry DC link capacitors (DCLCs), and crucially influences their voltage equalization and energy storage performance. However, at present, there is a lack of experimental observation on the insulation resistance characteristics of DCLCs in the presence of hig...
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| Format: | Article |
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MDPI AG
2024-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/5/1147 |
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| author | Xiaowu Sun Ying Qiao Yinda Li Chongfeng Cao Shenrong Feng |
| author_facet | Xiaowu Sun Ying Qiao Yinda Li Chongfeng Cao Shenrong Feng |
| author_sort | Xiaowu Sun |
| collection | DOAJ |
| description | Insulation resistance is a vital factor in dry DC link capacitors (DCLCs), and crucially influences their voltage equalization and energy storage performance. However, at present, there is a lack of experimental observation on the insulation resistance characteristics of DCLCs in the presence of high temperatures and operating voltages. In the present study, the insulation resistance and conductivity of DCLCs are methodically analyzed. For this purpose, the corresponding test platform is appropriately fabricated, the insulation resistance measurement experiments are performed at various temperatures and operating voltages, and the factors affecting the insulation resistance and conductivity of the DCLC are carefully examined. The results reveal that the insulation resistance of the DCLC reduces exponentially with the growth in voltage and operating temperature. When the operating voltage becomes greater than 4480 V or the operating temperature reaches higher than 70 °C, the decline in insulation resistance slows down. The conductivity of metalized polypropylene film in the DCLC increases exponentially with increasing voltage and temperature. By increasing the operating voltage from 1960 V to 5600 V and the temperature from 20 °C to 90 °C, the DCLC’s insulation resistance exhibits a descending trend from 891.30 MΩ to 2.14 MΩ, while its conductivity grows from 3.49 × 10<sup>−16</sup> S/m to 1.47 × 10<sup>−13</sup> S/m. The results reveal that the key factors affecting the insulation resistance of the DCLC are the polypropylene film and the metal evaporated from the metal layer. This research is anticipated to provide a valuable reference for the further development of science and technology pertinent to the insulation resistance of DCLCs. |
| first_indexed | 2024-04-25T00:30:54Z |
| format | Article |
| id | doaj.art-2e5969584acd479db4b13dd0da8167f1 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-25T00:30:54Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2e5969584acd479db4b13dd0da8167f12024-03-12T16:43:31ZengMDPI AGEnergies1996-10732024-02-01175114710.3390/en17051147Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating VoltagesXiaowu Sun0Ying Qiao1Yinda Li2Chongfeng Cao3Shenrong Feng4Wuxi Power Filter Co., Ltd., Wuxi 214112, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing 100084, ChinaWuxi Power Filter Co., Ltd., Wuxi 214112, ChinaWuxi Power Filter Co., Ltd., Wuxi 214112, ChinaWuxi Power Filter Co., Ltd., Wuxi 214112, ChinaInsulation resistance is a vital factor in dry DC link capacitors (DCLCs), and crucially influences their voltage equalization and energy storage performance. However, at present, there is a lack of experimental observation on the insulation resistance characteristics of DCLCs in the presence of high temperatures and operating voltages. In the present study, the insulation resistance and conductivity of DCLCs are methodically analyzed. For this purpose, the corresponding test platform is appropriately fabricated, the insulation resistance measurement experiments are performed at various temperatures and operating voltages, and the factors affecting the insulation resistance and conductivity of the DCLC are carefully examined. The results reveal that the insulation resistance of the DCLC reduces exponentially with the growth in voltage and operating temperature. When the operating voltage becomes greater than 4480 V or the operating temperature reaches higher than 70 °C, the decline in insulation resistance slows down. The conductivity of metalized polypropylene film in the DCLC increases exponentially with increasing voltage and temperature. By increasing the operating voltage from 1960 V to 5600 V and the temperature from 20 °C to 90 °C, the DCLC’s insulation resistance exhibits a descending trend from 891.30 MΩ to 2.14 MΩ, while its conductivity grows from 3.49 × 10<sup>−16</sup> S/m to 1.47 × 10<sup>−13</sup> S/m. The results reveal that the key factors affecting the insulation resistance of the DCLC are the polypropylene film and the metal evaporated from the metal layer. This research is anticipated to provide a valuable reference for the further development of science and technology pertinent to the insulation resistance of DCLCs.https://www.mdpi.com/1996-1073/17/5/1147DC link capacitorinsulation resistanceconductivityvolume conductivitymetalized polypropylene filmself-discharge time constant |
| spellingShingle | Xiaowu Sun Ying Qiao Yinda Li Chongfeng Cao Shenrong Feng Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages Energies DC link capacitor insulation resistance conductivity volume conductivity metalized polypropylene film self-discharge time constant |
| title | Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages |
| title_full | Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages |
| title_fullStr | Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages |
| title_full_unstemmed | Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages |
| title_short | Insulation Resistance Characteristics of Dry DC Link Capacitors in the Presence of High Temperatures and Operating Voltages |
| title_sort | insulation resistance characteristics of dry dc link capacitors in the presence of high temperatures and operating voltages |
| topic | DC link capacitor insulation resistance conductivity volume conductivity metalized polypropylene film self-discharge time constant |
| url | https://www.mdpi.com/1996-1073/17/5/1147 |
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