中国电机工程学报2016，Vol.36Issue(2)：327-334,588,9.DOI:10.13334/j.0258-8013.pcsee.2016.02.002
直流配电网中高频链直流变压器的电压平衡控制策略研究
DC Voltage Balance Control Strategy of High Frequency Link DC Transformer in DC Distribution System
摘要
Abstract
DC transformer plays a significant role in DC distribution system, and it functions as changing voltage level and managing power flow between high and low DC voltage bus. The DC solid state transformer (DCSST) based on dual active bridge (DAB) with high frequency link is the most widely accepted solution of DC transformer. The DC voltage balancing characteristic of the series connected DABs was analyzed. Usually the auxiliary power supply for each DAB should be taken from the DC bus of the DAB. The effects of the auxiliary power supply on DC voltage balance were explored in particular. On the basis of the study, a minimum voltage tracking balance (MVTB) control strategy based on chopper resistor was proposed for balancing DC voltage under the standby state. Together with the auxiliary voltage balancing control loop method which is widely used on the running state, the DC voltages of series connected DABs can be effectively balanced at all possible operation states including the power up state, the standby state and the running state. The experimental results verified the proposed control strategy.关键词
直流配电网/高频链/直流变压器/固态变压器/电压平衡控制/最低电压追踪控制Key words
DC distribution system/high frequency link/DC transformer/solid state transformer/DC voltage balance control/minimum voltage tracking balance分类
信息技术与安全科学引用本文复制引用
李建国,赵彪,宋强,黄永章,刘文华..直流配电网中高频链直流变压器的电压平衡控制策略研究[J].中国电机工程学报,2016,36(2):327-334,588,9.基金项目
国家863高技术基金项目(2013AA050104). The National High Technology Research and Development of China 863 Program (2013AA050104). （2013AA050104）
