中国电机工程学报2016，Vol.36Issue(21)：5757-5764,8.DOI:10.13334/j.0258-8013.pcsee.152506
基于MMC的直流电网分层能量平衡控制
Hierarchical Energy Balance Control for MMC-based DC Grid
摘要
Abstract
The key to maintain secure and stable operation of DC grid is to keep the instantaneous energy balance of DC system. Considering the energy balance control strategy, the literatures more focus on the energy balance control among converters while ignoring the instantaneous energy balance control inside the converter. This paper, considering the modular multilevel converter (MMC) based DC grid, investigateed the energy balance control inside MMC. Firstly, according to energy transfer in the arms, it analyzed the commutation process of the MMC. Then according the relationship between the submodule (SM) voltage and instantaneous energy flow in the arms, a control strategy to regulate the SM voltage was proposed to maintain the energy balance in the MMC. A hierarchical energy control architecture for DC grid was proposed by combining the system level energy control and internal energy balance control of MMC. The simulation results verified the effectiveness of the proposed control methodology.关键词
直流电网/模块化多电平换流器/换流过程/能量平衡控制/子模块电压控制Key words
DC grid/modular multilevel converter (MMC)/commutation process/energy balance control/sub-module voltage control分类
信息技术与安全科学引用本文复制引用
阎发友,汤广福,贺之渊,孔明,安婷..基于MMC的直流电网分层能量平衡控制[J].中国电机工程学报,2016,36(21):5757-5764,8.基金项目
国家电网公司科技项目(SGRIZLKJ[2015]457)。Project Supported by the State Grid Corporation of China (SGRIZLKJ[2015]457) （SGRIZLKJ[2015]457）
