Method and system for calculating probabilistic load flow considering unbalanced power distribution

• Main Authors: XU DAN, DING QIANG, CUI HUI, LI XIAOLEI, ZHANG JIANNAN, HU CHAOFAN, HUANG GUODONG, LI ZHIMING, ZHOU JINGYANG, ZHANG HONGTU, CHENG XIN, MEN DEYUE, LI BO, LI LIXIN, CAI ZHI, SUN ZHEN, PAN YI, CHEN ZHI, LIU FANG, QU KEDING, YANG JUNFENG, LIU LIHUA, DAI SAI, ZHAO YUMIN, SUN YI, HAN BIN, LUO ZHIQIANG, JIANG MAN, WU KUN, GUO XIAMING, LI MIN, XIONG HUAQIANG, ZHANG JIALI, WANG BIN, DENG YONG, YAN JINGHUA, ZHOU JIEYING, ZHANG CHUANCHENG, LI PEIJUN, HU CHENXU, YAN CUIHUI, XIA SHAOLIAN, ZHENG XIAOYU, LI QIANG, ZHANG XIAOTIAN, LI WEIGANG
• Format: Patent
• Language: Chinese; English
• Published: 27.04.2018
• 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 provides a method and a system for calculating a probabilistic load flow considering unbalanced power distribution. The method comprises the following steps: acquiring basic data; calculating the half invariant of a bus load and the half invariant of new energy unit output according to the acquired basic data; and obtaining the probability distribution of voltage and branch power flow considering injection power fluctuation and unbalanced power distribution according to the half invariant of the bus load and the half invariant of the new energy unit output. Through the technicalscheme provided by the invention, the unreasonable problem that unbalanced power in the probabilistic load flow in a traditional half invariant method is undertaken by balancing bus is solved, and theaccuracy and practicability of the probabilistic load flow in the half invariant method are improved. 本发明提供了种考虑不平衡功率分配的概率潮流计算方法及系统，包括：获取基础数据；根据获取的基础数据计算母线负荷的半不变量和新能源机组出力的半不变量；根据母线负荷的半不变量和新能源机组出力的半不变量求取考虑注入功率波动、不平衡功率分配的电压和支路潮流