Development of High Performance Damped Capacitive Divider

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420221
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Utsunomiya University
• Principal Investigator: SATO Shuji 宇都宮大学, 工学(系)研究科(研究院), 教授 (10215759)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 雷インパルス電圧 / 高電圧分圧器 / 制動容量型分圧器 / Ayrton-Perry Winding

Outline of Final Research Achievements

We have developed a high performance damped capacitive voltage divider and evaluated its response after measuring unit step response. The developed voltage divider significantly differ from the conventional same type divider in high voltage arm. Whilst 70kV class ceramic capacitors are piled up in the conventional type, newly developed divider's main column consists of strings of 4kV capacitors. The strings are wound spirally in opposite direction so that magnetic field generated by each string cancels each other. Divider's standard lightning impulse responses were evaluated by numerical convolution using measured unit step response. It was confirmed that T1-error was around 0.2% which is the level almost impossible to measure by today's technology.

Free Research Field

高電圧工学