Converter valve loss determination method of optical storage DC flexible MMC converter

• Main Authors: SONG JIAHANG, LUO YONGJIE, LI QIFEN, FAN BINGXIN, WANG QIANGGANG, ZHOU NIANCHENG, CHI YUAN, ZHENG HONG
• Format: Patent
• Language: Chinese; English
• Published: 11.10.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to the technical field of power transmission and distribution of a power system, in particular to a converter valve loss determination method for an optical storage direct flexible MMC converter, which comprises the following steps: S1, calculating on-state loss of a converter valve of the MMC converter; s2, calculating the switching loss of a converter valve of the MMC converter; s3, adding the on-state loss and the switching loss to obtain converter valve loss of the MMC converter; wherein S1 comprises the following steps: S11, calculating average on-state loss based on a fundamental frequency period between switching devices in a sub-module; s12, calculating the average on-state loss of the switching device based on the switching period; and S13, enabling the on-state fitting parameters of the IGBT and the diode to be equivalent, respectively taking a larger value as a calculation parameter, and calculating the on-state loss of the converter valve through the calculation parameter. Ac