Capacitive equipment state evaluation method based on dielectric loss factor tg delta

• Main Authors: ZHAO JINING, ZU SHUTAO, LI LIANZHONG, WANG XU, HU WEITAO, LI QIANG, YANG SHIBO, LI JIANPENG
• Format: Patent
• Language: Chinese; English
• Published: 25.10.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC DIGITAL DATA PROCESSING; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR; TESTING

The invention relates to a capacitive equipment state evaluation method based on dielectric loss factors tg delta, which comprises the following steps of: (1) forming historical data of the dielectric loss factors tg delta of A-phase equipment, B-phase equipment and C-phase equipment into a vector form; (2) calculating a dielectric loss factor correlation coefficient rAB between the phase A and the phase B, a dielectric loss factor correlation coefficient rBC between the phase B and the phase C and a dielectric loss factor correlation coefficient rCA between the phase A and the phase C; and (3) calculating and comparing the numerical values of rAB, rBC and rCA, and judging whether the A, B and C phases are in a normal state, an attention state or an abnormal state respectively. According to the capacitive equipment state evaluation method based on the dielectric loss factor tg delta, the tg delta historical data obtained by the capacitive equipment online monitoring device form a vector form, the correlation