Development of a new insulating cylinder to achieve corona-free operation when high voltage is applied

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04014
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21010:Power engineering-related
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: Takayanagi Tomohiro 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J－PARCセンター, 研究主幹 (10354755)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 高電圧 / 半導体スイッチ / コロナ放電 / 環境

Outline of Final Research Achievements

An insulating cylinder that does not generate corona discharges when high voltage is applied and has excellent reliability and service life has been developed for the practical application of high-voltage semiconductor switches. The insulating cylinder developed eliminates the air layer that causes corona discharges by metalizing the inner and outer surfaces to the insulating cylinder. In addition, by fixing the potential at the transmission conductor and surface of the cylinder, and by realizing a curved shape of the insulating cylinder was established that mitigates the strong electric field without relying on air insulation, insulating oil or insulating gas. Current-carrying tests were conducted using a semiconductor switch, and it was confirmed that analysis and testing confirmed a structure that mitigates the strong electric field and achieves corona-free operation.

Free Research Field

電力工学

Academic Significance and Societal Importance of the Research Achievements

技術開発が進む次世代パワー半導体の利用を促進させ、半導体スイッチの更なる高度化を実現する。また、絶縁油や絶縁ガスを使用しないため、産業廃棄物や温室効果ガスの削減を可能とする環境に優しい高機能な半導体スイッチを産業技術の多様化として提供することができる。