Capacitive voltage transformer online analysis method and related device

• Main Authors: CHEN XIANXI, SONG ANQI, LIU SHAOHUI, LI XIN, TU WANJING, WANG JUNBO, LUO RONGBO, ZENG QINGHUI, MA RONGRONG, XIONG SHIBIN, LIU SONG, LI LANYIN, JIANG WEI, LIANG NIANBAI, ZHANG YIN
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a capacitor voltage transformer online analysis method and a related device. The method comprises the following steps: acquiring secondary voltage historical data of a capacitor voltage transformer to be tested online, and online monitoring historical data of capacitance and leakage current of a bushing on the corresponding side of a main transformer hung on the capacitor voltage transformer to be tested online; calculating a voltage absolute deviation ratio as a first evaluation index, and judging whether an abnormal standard is met or not; when the first evaluation index exception standard is met, starting exception alarm; when the first evaluation index abnormal standard is not met, the voltage relative deviation ratio is calculated as a second evaluation index, whether the abnormal standard is met or not is judged, and when the second evaluation index abnormal standard is met, abnormal alarm is started; and when the second evaluation index abnormal standard is not met, returning to