发明名称 |
PARTIAL DISCHARGE CHARGE AMOUNT MEASURING METHOD AND DEVICE |
摘要 |
A partial discharge charge amount measuring method includes generating a partial discharge in a sample by applying a voltage from a voltage impressing device connected to the sample, the voltage being higher than a partial discharge inception voltage, continuously measuring and recording terminal voltages of a capacitor connected in series between the sample and a ground at least until a breakdown of the sample occurs by alternately operating at least two data loggers connected to the capacitor at intervals of a predetermined time, calculating an amount of electric charge discharged from the sample and remaining in the capacitor by multiplying a difference in the recorded terminal voltages of the capacitor by a capacitance of the capacitor, and calculating an accumulated discharge amount by accumulating the discharged amount of electric charge at earliest until the breakdown of the sample occurs. |
申请公布号 |
US2014159755(A1) |
申请公布日期 |
2014.06.12 |
申请号 |
US201314088209 |
申请日期 |
2013.11.22 |
申请人 |
Hitachi Metals, Ltd. |
发明人 |
SUMI Yosuke;Chiwata Naofumi;Kikuchi Hideyuki |
分类号 |
G01R31/02 |
主分类号 |
G01R31/02 |
代理机构 |
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代理人 |
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主权项 |
1. A partial discharge charge amount measuring method, comprising:
generating a partial discharge in a sample by applying a voltage from a voltage impressing device connected to the sample, the voltage being higher than a partial discharge inception voltage; continuously measuring and recording terminal voltages of a capacitor connected in series between the sample and a ground at least until a breakdown of the sample occurs by alternately operating at least two data loggers connected to the capacitor at intervals of a predetermined time; calculating an amount of electric charge discharged from the sample and remaining in the capacitor by multiplying a difference in the recorded terminal voltages of the capacitor by a capacitance of the capacitor; and calculating an accumulated discharge amount by accumulating the discharged amount of electric charge at earliest until the breakdown of the sample occurs.
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地址 |
Tokyo JP |