The Development and Practical Use of A New 24 kV Dry Air Insulated Switchgear
| Autor: | Tomotaka Yano, Naoaki Inoue, Tadahiro Yoshida, Toshie Takeuchi, Shinji Sato, Nobumoto Tohya, Masahiro Arioka |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | IEEJ Transactions on Power and Energy. 126:359-364 |
| ISSN: | 1348-8147 0385-4213 |
| DOI: | 10.1541/ieejpes.126.359 |
| Popis: | We have developed a new environmentally fitted 24kV cubicle-type gas insulated switchgear (C-GIS) applying our dry air insulation technology and the electromagnetic actuation technology. Firstly, we clarified the relationship between the breakdown field strength at the tip/edge of high-voltage electrode in dry air and the field utilization factor expressing non-uniformity of the insulation gap. Based on the relationship, we designed the most suitable configuration and arrangement of the parts such as high-voltage conductors, disconnecting blades and some mechanical parts in a gas vessel. We succeeded in reducing both the number of insulation barriers and their size, compared with the former product. To reduce them, we produced some sample gaps simulated a practical insulation gap in the C-GIS and investigated its breakdown voltage dependence on the barrier height. Secondly, to apply the electromagnetic actuators for the operation mechanisms of the vacuum circuit breaker, we developed a new coupled analysis method that estimates the movement of a plunger inside the electromagnetic actuator and the electric current flowing through a closing/opening coil. Based on the analysis method, we could reduce both the number of the parts and close/open energy 45% and 80%, respectively, compared with the former spring-charged mechanism. |
| Databáze: | OpenAIRE |
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