Main and distribution network integrated state estimation method based on multi-source measurement

• Main Authors: FANG XIN, XIAO XIAOLONG, XIA TAIBAO, LI YONG, MAO WANGQING, SUN JIAN, GE XUAN, WANG XIURU
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; GENERATION; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention relates to a main and distribution network integrated state estimation method based on multi-source measurement, and the method achieves the cooperative use of PMU measurement data, SCADA measurement data and AMI measurement data under different observation conditions based on the global convergence characteristic of a state estimation algorithm of a dynamic system. According to the invention, in order to effectively realize state estimation of hybrid measurement, a local refresh extremely fast state estimation model and a global robust state estimation model are provided to cope with a local refresh scene of PMU measurement and a hybrid refresh scene of different types of measurement. Through the effective combination and coordination of the two models, the invention further provides a state estimation method for the integration of the main and distribution networks, thereby achieving the measurement interaction iteration solution of the main and distribution networks, and effectively improving