Open AccessBypassing-contravariant mode switching method for UPS in economic mode based on DSP program
Author(s) -
Dawei Li,
Qiaochu Zhang,
Dan Liu,
Yue Li,
Yi Ren,
Qiming Zhuang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1633/1/012088
Subject(s) - power (physics) , mains electricity , reliability (semiconductor) , switched mode power supply , mode (computer interface) , digital signal processing , computer science , inverter , quality (philosophy) , reliability engineering , electronic engineering , voltage , engineering , electrical engineering , philosophy , physics , epistemology , quantum mechanics , operating system
Uninterrupted power supply has the highest efficiency and reliability under economic mode. When the grid power quality is qualified, the economic model UPS uses the grid power supply to supply the load directly, which achieves the highest system efficiency. However, when the voltage is too high, too low or the frequency is not normal, the large circulation will cause device damage or UPS failure, which cannot meet the requirements of load on power quality. To solve this problem, this paper proposes a switching control method of UPS system from bypass power supply state to inverter power supply state in economic mode based on DSP program. The method analyses the theoretical basis and switching time sequence of over-high detection of mains power in detail, and proves the effectiveness of the proposed method through experiments.