Cable intermediate joint insulation state evaluation method, system and device

• Main Authors: WU ZHUOJUN, LUO RONGBO, LIU SHAOHUI, LI GUOWEI, LIU YIJUN, LIANG NIANBAI, CHEN PENG, LIU HAO, QIU HAORONG, ZHANG YIN, OU XIAOMEI, HUANG JING
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to the technical field of power equipment monitoring, and discloses a cable intermediate joint insulation state evaluation method, system and device. The method comprises the following steps of: selecting a partial discharge signal of a cable intermediate joint to extract a feature vector, taking the feature vector as an evaluation index, determining a constant weight of each evaluation index by utilizing an analytic hierarchy process, correcting the constant weight according to the deterioration degree of the evaluation index, and further determining the partial discharge of the cable intermediate joint according to the corrected weight and a subsequently established membership degree function. Obtaining an insulation state evaluation result of the cable intermediate joint by using a fuzzy comprehensive evaluation method; according to the method, the measurement index of the deterioration degree is provided, the deterioration degree is used for representing the damage degree of the eval