Method and system for comprehensively evaluating electric energy quality of low-voltage power distribution network

• Main Authors: TANG ZONGSHUN, QIU YONG, ZHAO YIJUE, LI WENJUAN, ZHANG YUNYAN, YE QIGE, ZHANG LINNA, YANG FAN, ZHANG YUAN, ZHANG XU, YUE JIAN
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention provides an electric energy quality comprehensive evaluation method of a low-voltage power distribution network, which adopts a method of combining improved grey clustering and combined weighting to carry out comprehensive evaluation on electric energy quality, and obtains whitening weight coefficients of each index belonging to each evaluation grade by introducing an exponential whitening weight function. And calculating the weight of each electric energy quality evaluation index according to a combined weighting mode, and finally calculating a comprehensive clustering coefficient to carry out comprehensive evaluation on the electric energy quality of the sample to obtain the membership degree of the evaluation object to different electric energy quality grades and the electric energy quality grades. The method can reflect the membership degrees of the samples to different electric energy quality grades, can distinguish the electric energy quality of the samples of the same grade, and provides