摘要
暂态过程中出现的电压跌路和负荷冲击会导致母线电压不稳定,从而对微电网运行造成影响。为削弱这一影响,提出基于功率前馈和双闭环控制策略的双功率变换拓扑结构。该结构结合超级电容和蓄电池进行储能,引入Buck/Boost双功率变换回路,对功率半导体器件采用双PWM控制,实现能量双向流动;建立了状态方程模型并对其进行仿真;结果表明,该结构及控制策略能有效抑制暂态过程中直流母线的电压波动,超调量几乎为零,母线电压在400 V处维持恒定。
In order to weaken the influence on micro-grid operation of dc-bus voltage instability caused by Voltage drop or shock load during transient state process, a hi-power conversion topology was presented,which adopted feed-forward and Double-closed-loop control strategy. The program combines the super capacitors and batteries, imports Buck/Boost bi-power conversion circuit, adopts complementary PWM control of the structure of two power semiconductor devices, realizes the energy hi-directional transformation. And the state equation models are built and simulated. The simulation results showed that the voltage fluctuation of the dc-bus voltage is immunized effectively by the stmcture and the technology,maximum deviation almost is zero and the bus voltage is maintained at 400 V place stationary.
出处
《电子器件》
CAS
北大核心
2014年第5期973-977,共5页
Chinese Journal of Electron Devices
基金
校级科研基金项目(00331611016)
北京市教育委员会科技计划面上项目(KM201310016002)
