Multi-level micro-grid intelligent operation method and device based on Lagrange relaxation

• Main Authors: YAN GUANGYING, LIU DONGLIANG, YAO WEI, ZHANG YUQI, PEI XINYAN, XU LIANG, ZHAO JIN, GUO DONGYAN, WANG JIANXIAO, HE SHENG, GONG JIFENG, WANG ZHONGGUAN, XU JING, ZHAN HONG, GUO ZIQIANG, HAN HAI'AN, LI WEI, MENG QINGLIN, ZHAO LEI, GUAN SHAOQING
• Format: Patent
• Language: Chinese; English
• Published: 26.12.2023
• 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 discloses a multi-level micro-grid intelligent operation method and device based on Lagrange relaxation. The method comprises the following steps: defining an equation of three-stage state variables of an AC/DC micro-grid; and based on the equation of the three-stage state variables, defining the three-stage state variables of the AC/DC micro-grid. Through the design of an AC/DC micro-grid three-stage state estimation model based on a Lagrange relaxation method, the stability of the AC/DC micro-grid is ensured, the three-stage state of the AC/DC micro-grid can be estimated, and each state quantity of the operation of the AC/DC micro-grid is judged; the method changes a centralized calculation operation mode of a traditional AC/DC micro-grid three-stage state estimation model, simplifies the calculation process, is simple and convenient in calculation, improves the calculation efficiency to a certain extent, and meets the requirements of power grid management. 本发明公开了基于拉格朗日松弛的多层级微电网智慧运行方法及设备，定义交直流