摘要
简单介绍了三相Delta变换型不间断供电电源(UPS)的结构组成和其区别于传统在线式UPS的优点。依据UPS系统的电压补偿工作原理和功率因数校正工作原理,详细分析了串联Delta变换器和并联主变换器的工作状态及其在UPS系统中的重要作用。基于同步旋转坐标系下的d-q变换法,对电流增量和不对称有畸变的市电电压进行检测。进而详细研究了正弦脉宽调制(SPWM)控制器的控制策略,Delta变换器和主变换器分别受控为标准正弦波电流源和标准正弦波电压源。最后,通过详细分析系统特性仿真结果,验证了Delta变换型UPS整机运行方式,证明了该控制策略的可行性。
The structure of Delta- conversion type UPS （Uninterruptable Power Supply） and its distinguished merits from the traditional on- line UPS are presented. Based on principles of the voltage compensation and the power factor correction,the working states of the series Delta converter and the parallel main converter and their importance in the whole UPS are analyzed. By controlling the Delta converter as a fundamental sine current source and the main converter as a fundamental sine voltage source,the control strategy of SPWM（Sine Pulse Width Modulation） controller are investigated based on the d-q method. The detailed analysis of system performance simulation verifies the operation mode of Delta-conversion type UPS and its feasibility.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第4期14-18,共5页
Electric Power Automation Equipment
