Hybrid measurement state estimation method considering adjustable load influence and load uncertainty

• Main Authors: LI CHENGDA, ZHANG JIE, LI YUXIAO, ZONG XINGCHEN, HUANG TIAN'EN, LIAO PEI, TANG JIAN, DONG HANG, SU KUNXING, MO YAJUN, SUN HAO, XU SHUANGDIE, XIA YAN, WANG YUANTAO, ZHOU YIXI, CHEN JIANING, ZHOU ZHIQUAN, WU ZHENJIE, XU PENG, ZHANG CHAO, LI XIANG, SUN SICONG, WANG YAN
• Format: Patent
• Language: Chinese; English
• Published: 18.02.2022
• 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 hybrid measurement state estimation method considering adjustable load influence and load uncertainty, and the method comprises the following steps: 1, selecting an uncertain load reference value, constructing a distribution model of uncertain loads, employing a Monte Carlo algorithm, and selecting a plurality of possible values of the uncertain loads from the distribution as initial values of uncertain loads to participate in optimal power flow (OPF) calculation; 2, regarding an adjustable load in the power network as a negative power generator node, and obtaining an initial value of the adjustable load in the current power network through optimal power flow calculation; 3, taking the optimal power flow calculation result as an actual value of the power network, and superposing the actual value of the network with normal deviation to simulate a measurement initial value of state estimation of the power system; 4, performing SCADA/PMU hybrid measurement state estimation operation bas