摘要
随着智能电网建设的提出,单一耗电设备已经无法满足其发展要求,绿色、节能、并网型用电设备成为发展趋势。提出一种具有馈电功能的新型并网不间断电源(uninterruptible power supply,UPS)系统及其拓扑结构,并将该结构拆分为4个单相全桥电路,依次组成脉宽调制(pulse width modulation,PWM)整流馈电模块、隔离双向DC/DC模块以及逆变模块,从而使系统成为一可以四象限运行的电源装置。在此基础上,设计了系统的工作模式与分层控制体系,并将核心控制层离散为7个模块化的子控制器,通过它们的分散逻辑组合实现各部分的控制策略,从而达到不同工作模式下稳态和暂态运行的控制目标。最后,搭建了仿真系统和实验样机,验证了系统拓扑和控制的正确性及有效性。
With the proposal of the construction of smart grid,the single electricity consuming equipment can no longer satisfy the need of the development of smart grid.＂Green＂,energy saving and grid-connected electrical equipment become the main development trend.The paper proposed a novel grid-connected uninterruptible power supply（UPS） system with the electricity feedback function and its circuit topology.The system can be split into four single-phase bridge converters,which,in turn,are grouped to formed pulse width modulation（PWM） rectifier and feeder module,isolated bidirectional DC-DC module and inverter module,so the system becomes a four-quadrant operation power supply device.On this basis,the operation modes of system were designed,and the control system was split into seven modular sub-controllers.With their combinational logic,the control strategy of each module were implemented,so the control targets of steady state and transient state in different modes were achieved.At last,simulation and experimental results verified the validity and effectiveness of the proposed circuit topology and control strategy.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第31期85-93,共9页
Proceedings of the CSEE
关键词
电力系统
不间断电源
馈电
并网
分散逻辑
power systems
uninterruptible power supply（UPS）
electricity feedback
grid-connected
distributed logic control
