Method for correcting actual injection power of each node induction motor of power grid in dynamic power flow analysis

• Main Authors: WANG JIAJIA, LI NAN, HU YUNXU, LI SEN, YU YIPING, XU YARU, SUN BO, LANG YANSHENG, YANG XIAONAN, WU XUHAN
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2019
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention provides a method for correcting actual injection power of each node induction motor of a power grid by taking the frequency characteristics of induction motors into account in dynamic power flow analysis, which provides a precise algorithm for equating a plurality of node induction motors into one induction motor taking the frequency characteristics into account when the dynamic power flow analysis modeling of a large power grid is performed, the capacity of the induction motor is considered when parameters are aggregated, the parameters such as an inertia time constant, the proportion of motor power to bus power, a load factor, stator reactance, rotor reactance and a torque equation constant which have great influence on the frequency characteristics in the induction motorsare considered, so that a good effect is obtained in the equivalent modeling research of the dynamic power flow of the larger power grid by the induction motor taking the frequency characteristics. 本发明提供一种在动态潮流分析中计及感应电动机频率特性