Method and device for evaluating stability of multi-converter direct current power supply system

• Main Authors: LI QINGYING, ZHANG BO, DIAO LIJUN, DONG KAN, LI YANLEI, WANG XIAOFAN, LIU WEIZHI, WANG YONGXIANG, YANG WEIJUN, LIU BING, YANG NING, QIU YU, LIU DONGHUI, MA YINGTAO, CAO HONGFA, ZHAO HONGWEI, WANG CHAO, LIU JING, ZHAO YU
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2023
• 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 provides a multi-converter DC power supply system stability evaluation method and device, and relates to the technical field of rail transit vehicles. The method comprises the following steps: randomly generating multiple groups of load disturbance quantities; the disturbance range of each group of load disturbance quantity is within a preset interval range, and the limit value of the preset interval range is doubled; performing time domain simulation on the multi-converter direct current power supply system model into which the multiple groups of load disturbance quantities are substituted; and evaluating the time domain simulation result based on a preset stability evaluation condition to obtain a stability evaluation result of the multi-converter DC power supply system. The device executes the method. According to the multi-converter direct current power supply system stability evaluation method and device provided by the embodiment of the invention, accurate evaluation of the stability of th