摘要
介绍了一种新型单相串并联双变流器UPS电源系统的拓扑结构和控制策略。该UPS系统在电网停电逆变模式下两个变流器同时协调工作,并联变流器工作在50Hz低频脉冲波开关状态,其产生的谐波由工作在高频PWM状态的串联变流器补偿,系统的输出波形仍为正弦波,整体效率有所提高。仿真研究证明了该方案的可行性以及在改善UPS性能上的有效性。
A new kind of the topological structure and control strategy of single-phase series-parallel dual-inverter UPS system is analyzed.The two inverters of the UPS system can concurrently work in harmony when the electric network is service interruption in contravariant mode.The parallel inverter works in on-off state of 50Hz low frequency pulse wave,its harmonic is compensated by the series inverter which works in high frequency PWM state.The output waves of the system are still sine waves and the efficency of the UPS system is increased.The simulation study has proved feasibility of the plan and validity of improving UPS performance.
出处
《电气开关》
2010年第4期18-20,共3页
Electric Switchgear
关键词
UPS
拓扑结构
控制策略
双变流器
谐波补偿
逆变
仿真
UPS
topological structure
control strategy
dual-inverter
harmonic compensation
inverter
simulation
