摘要
以单相工频不间断电源(UPS)为对象,针对直流母线电压宽范围变化,提出一种双环控制策略的设计方法。通过建立单相工频UPS的数学模型,分析了直流母线电压宽范围变化对双环控制器稳定性的影响,推导得到前级不控整流输出母线电压与后级逆变器负载的关系。在此基础上,根据系统幅相特性曲线,推导得到双环控制器的设计方法。仿真和实验证明了该设计方法在直流母线电压宽范围变化时UPS仍具有较优的性能。
A design method of dual-loop control for the single phase power frequency uninterrupted power supply （UPS） is proposed to deal with the wide variation of the DC bus voltage.By establishing the mathematical model of the topo- logy, the influence on stability of dual-loop control due to the DC bus voltage changing wide is analyzed.And the rel- ationship between the uncontrolled rectifier output voltage of front stage and the inverter load is derived in detail.On the basis of this, the design method of dual-loop control is clarified according to the amplitude and phase characteris- tic curve of the system.The simulation and experiments show the proposed method can still have a better performance in applications of wide range DC bus voltage.
出处
《电力电子技术》
CSCD
北大核心
2017年第10期63-65,共3页
Power Electronics
基金
国家自然科学基金(51377082
51407153)
江苏省"青蓝工程"项目
研究生创新基地(实验室)开放基金(KYLX16_0361)~~
关键词
不间断电源
双环控制
宽范围变化
uninterrupted power supply
dual-loop control
wide variation
