MMC-MG配电网系统动态冗余控制策略设计及仿真优化  

Design and Simulation Optimization of Dynamic Redundancy Control Strategy for MMC-MG Distribution Network System

作　　者：张婉明 席海阔 白明辉[1] 李莉 张新亮 ZHANG Wanming;XI Haikuo;BAI Minghui;LI Li;ZHANG Xinliang(Chengde Power Supply Company of State Grid Jibei Electric Power Co.,Ltd.,Chengde 067000,China)

机构地区：[1]国网冀北电力有限公司承德供电公司,河北承德067000

出　　处：《微型电脑应用》2023年第11期84-86,90,共4页Microcomputer Applications

摘　　要：为了提高MMC串联结构配电网系统的可靠性,研究MMC-MG系统内包含冗余微源的组成结构,设计一种通过EEMD分解方法来实现动态冗余调节的方案。通过EEMD分解技术提取功率的低频分量,确认功率排序所需的GM。EEMD分解策略不仅能够达到动态冗余的效果,同时获得了更高的微源利用率。研究结果表明,当系统处于稳定运行状态时,形成了对称分布的稳定三相线电压,线电压只发生0.35%的小幅度畸变;三相线的电压波形呈明显的不对称分布状态,使谐波畸变率提高至3.05%。由此说明采用动态冗余控制方式可以使系统达到良好的可靠性。In order to improve the reliability of MMC series structure distribution network system,the composition structure of MMC-MG system containing redundant micro-source is studied,and a scheme of dynamic redundancy adjustment is designed by using EEMD decomposition method.The low-frequency component of micro-source power is extracted by EEMD decomposition technology,and the GM required for micro-source power sequencing is confirmed.EEMD decomposition strategy not only achieves dynamic redundancy,but also achieves higher micro-source utilization.The results show that when the system is in stable operation state,the symmetrical distribution of stable three-phase line voltage is formed,and only 0.35%of the line voltage distortion occurs.The voltage waveform of three-phase line shows obvious asymmetrical distribution,which increases the harmonic distortion rate to 3.05%.The dynamic redundancy control method in this paper can make the system achieve good reliability.

关 键 词：集合经验模态分解 配电网 微源 动态冗余 功率分解 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]