引用本文: | 李 宋,叶满园,袁义生.单相UPS的单开关AC-DC/DC-DC变换电路[J].电力自动化设备,2011,31(7): |
| LI Song,YE Manyuan,YUAN Yisheng.Mono-switch AC-DC/DC-DC converter for single-phase UPS[J].Electric Power Automation Equipment,2011,31(7): |
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摘要: |
介绍了一种应用在单相UPS系统中的新型单开关AC-DC/DC-DC变换电路,该电路由1个功率开关器件和6个二极管组成,能够实现AC/DC整流和DC/DC升压2种功能。在详细分析了该电路运行模式及工作原理的基础上,采用了单周期非线性控制理论对其进行控制,利于2个低速PI调节器对直流母线上的2个电容器电压进行控制,1个高速PI调节器对输入电流进行控制。仿真结果表明,该电路简单可靠,输入功率因数高,电流谐波失真小,可以获得稳定的正负直流母线电压。 |
关键词: 功率因数校正 不间断电源 计算机仿真 变换器 电路拓扑 |
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基金项目:国家自然科学基金资助项目(51067004);江西省教育厅科技项目(GJJ09147) |
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Mono-switch AC-DC/DC-DC converter for single-phase UPS |
LI Song, YE Manyuan, YUAN Yisheng
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School of Electrical Engineering,East China Jiaotong University,Nanchang 330013,China
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Abstract: |
A mono-switch AC-DC/DC-DC converter used in single-phase UPS system is introduced,which consists of one power switch and six diodes. As both AC-DC rectifier and DC-DC booster,its operating modes and working principle are detailed. The single-cycle nonlinear control is adopted,which applies two low-speed PI regulators to control the voltage of two capacitors on DC link and a high-speed PI regulator to control the input current. Simulative results prove that,being simple and reliable,it outputs stable DC bus voltage with high input power factor and low THD. |
Key words: electric power factor correction uninterrupted power supply computer simulation electric converters electric network topology |