摘要
为提高不间断电源(UPS,uninterruptiblepowersupply)冗余并联运行系统的可靠性和工程可实现性,提出了一种实现瞬时值均流的分布式控制新方法。基于平均电流法原理,通过连接各并联UPS模块的仅3条低频信号总线(而无需专门的控制模块)实现均流。通过均流回路与基准同步回路的解耦控制,使系统惯性大大降低。只用一个调节器,既调节输出电压、同时又实现环流抑制。并联系统在线性或非线性负载条件下都具有很好的动态响应性能和均流效果。文中分析了系统结构和工作原理,并给出了仿真和实验结果。
A distributed control scheme with instantaneous current sharing was developed for more reliable redundant parallel operation of UPS. Current sharing based upon the average current method is realized by using a shared bus to connect all the parallel modules without extra control modules. The shared bus consists of only three noise insensitive lines regardless of how many modules are in parallel. The current sharing control is decoupled from the reference synchronization control through local feedback of the averaged reference to greatly reduce system inertia. The voltage regulator also serves as the current deviation controller. As a result, the system has fast dynamic response and equal current load sharing for both linear and nonlinear loads. The system configuration and operating principle are described with simulated and experimental results.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第3期333-336,共4页
Journal of Tsinghua University(Science and Technology)
基金
江苏省应用基础基金项目(BJ97053)
关键词
逆变器
不间断电源
并联
均流
inverters
uninterruptible power supply
parallel operation
current sharing
