Method for evaluating source load unbalance degree of regional power grid

• Main Authors: ZHANG RUI, LIU QING, LI LULU, TIAN JIA, LI SHENGHU, LI KUN, LI ZHIWEI, FENG PEIRU, WANG XULI, WANG JIAQING
• Format: Patent
• Language: Chinese; English
• Published: 05.05.2023
• 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; ELECTRIC DIGITAL DATA PROCESSING; 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 discloses a regional power grid source load unbalance degree evaluation method. The method comprises the following steps: 1, constructing a probability scene set of wind power, photovoltaic output and load change reflecting random characteristics; 2, enumerating the operation state of the multi-region interconnected power grid; 3, calculating load flow to judge whether the whole power grid is out of limit or not, if so, executing the step 4, otherwise, executing the step 5; 4, establishing two optimization models to adjust power, and solving by adopting a particle swarm algorithm; 5, calculating the probability of the current state and the unbalance degree of the regional power grid; 6, judging whether enumeration of all operation states is completed, if yes, executing the step 7, and if not, returning to the step 2; 7, calculating the unbalance degree of a single regional power grid by adopting a probability weighting method; and 8, analyzing the source-load balance capability of the single reg