Power grid risk assessment method and system

• Main Authors: WANG WEILONG, GU NIU, JIA NAN, TIAN CHONGFENG, HU RUIJIA, MA QINGWEI, CHEN WEN, HOU LIANGXIAO, ZHANG YIXU, JIANG XUENING
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2023
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRICITY; GENERATION; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention belongs to the technical field of risk assessment of power systems, and particularly relates to a power grid risk assessment method and system, and the method comprises the steps: obtaining power transmission line information and landform information; dividing the power transmission line into a plurality of adjacent tower sections; calculating the average lightning trip-out rate of each tower section according to the meteorological data, the power transmission line information and the landform information in each tower section; calculating a comprehensive lightning trip-out rate according to the average lightning trip-out rate of each tower section and the landform weight of the tower section; according to the comprehensive lightning trip-out rate, the permanent failure rate of the power transmission line is judged by combining the automatic reclosing failure rate and the manual forced transmission failure rate of the power transmission line subjected to lightning trip-out; and evaluating a safe