摘要
不间断电源(uninterrupted power supply,UPS)是电力系统电能质量问题的重要解决方案,环流抑制问题是目前多台UPS并联技术中的研究重点与难点.基于CAN总线的模块化UPS并联控制策略,应用虚拟多回路输出阻抗下垂控制,并采用CAN总线通信实现各并联UPS模块间的同步和均流控制.实验结果表明,提出的方法在抑制子模块环流的同时解决了分布式系统的信号稳定性问题,保证了模块化UPS并联系统数据传输的准确性和实时性.
UPS is an important solution to power quality problems in power systems.The problem of circulation suppression is the focus and difficulty in the study of multiple UPS parallel technology.Based on the above problems,the parallel control strategy of modular UPS based on CAN bus is proposed.The method uses virtual multi-loop output impedance droop control and CAN bus communication to realize synchronization and current sharing control among parallel UPS modules.The experimental results show that the proposed method not only inhibits the circulation of sub-modules,but also resolves the signal stability problem of distributed system,and ensures the accuracy and real-time data transmission of modular UPS parallel system.
出处
《西安工程大学学报》
CAS
2018年第6期691-696,共6页
Journal of Xi’an Polytechnic University
基金
国家高技术研究发展计划(863计划)项目(2012AA053604)
福建省科技计划项目(2018H4019)
关键词
UPS
均流
环流抑制
CAN总线
虚拟多回路
并联控制
UPS
current equalization
circulation suppression
CAN bus
virtual multi-loop
parallel control
