Integrated on-line diagnosis method and system for temperature and current of high-voltage switchgear and medium

• Main Authors: MAO WENQI, YUAN PEI, PENG CHENG, WU SHUIFENG, LIANG WENWU, HAN ZHONGHUI, ZENG ZHAOQIANG, LI XIGUI, GAN SHENGLIANG, ZHOU TING, PENG JIA
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

The invention discloses an integrated on-line diagnosis method and system for the temperature and current of a high-voltage switchgear and a medium. The on-line diagnosis method comprises: measuring aload current I, an ambient temperature T0, and an actually measured temperatureTsc of a temperature measurement point of a high-voltage switchgear; calculating an actually measured temperature rise delta TSC of the temperature measurement point based on the ambient temperature T0 and the actually measured temperature Tsc of the temperature measurement point and calculating an ideal temperature rise deltaTLX of the temperature measurement point by mappingbased on the load current I; dividing the ideal temperature rise deltaTLX by the actually measured temperature rise delta TSC of the temperature measurement point to obtain a load temperature rise health degree R of the temperature measurement point; and comparing the load temperature rise health degree R with a preset state threshold range to compare and determin