A Dual Cooperative Optimization for Optimal Redundancy Quantity of MMC Submodules of Flexible Controller

Shanghai Jiaotong Daxue xuebao

MA Zhoujun, WANG Yong, WANG Jie, CHEN Shaoyu¹ 

[1] 1. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210019, China;

关键词: modular multilevel converter (mmc);    redundant submodule;    nsgaii multi-objective optimization;    weight coefficient;    redundancy quantity optimization;   

DOI  :  10.16183/j.cnki.jsjtu.2021.444

来源: DOAJ

【 摘 要 】

The failure of modular multilevel converter (MMC) submodules in the flexible direct current (DC) system affects the normal operation of the system, and the mutual restriction of reliability and economy is one of the key issues of MMC redundancy configuration optimization. A multi-objective optimization function of MMC reliability and economy mathematical model with redundant submodules was established. Based on the weight coefficient and NSGAII multi-objective optimization methods, a dual collaborative optimization for redundancy quantity of flexible controller was proposed. Combining the advantages of the two methods, the intersection of the two optimization results was calculated under the same redundancy quantity selection preference. A model based on a DC project in a flexible station area of Nanjing was built in MATLAB. The simulation results prove that the proposed method can not only meet the reliability of the flexible DC system, but also significantly improve the economy. It provides ideas for redundancy quantity of MMC submodules in the actual flexible DC project.

【 授权许可】

Unknown