【作者】 李旭；

【导师】 陈道炼；

【作者基本信息】 南京航空航天大学 ， 电力电子与电力传动， 2005， 硕士

【摘要】 本文论述了并联逆变器电路结构和控制技术的现状与发展。逆变器并联运行可以提高供电的可靠性、易于扩容。三态DPM电流滞环控制高频脉冲直流环节静止变流器,可以方便的实现共用电压环的并联系统。 共用电压外环并联逆变器,由三个相同的三态DPM电流滞环控制高频脉冲直流环节逆变器模块构成,每个逆变器模块由占空比扩展有源箝位正激式高频脉冲直流环节电路与DC/AC逆变桥级联而成,前级采用电压型PWM前馈控制技术,后级采用三态DPM电流滞环控制技术。本文论述了共用电压外环三态DPM电流滞环控制高频脉冲直流环节并联逆变器的工作原理,分析了并联逆变器的均流问题。并进行了仿真。 设计并研制成功了3kVA 27VDC/115V400HzAC共用电压外环三态DPM电流滞环控制并联高频脉冲直流环节航空静止变流器样机。试验结果表明,该并联逆变器具有体积重量小、变换效率高、静态精度高、动态响应快、输入电压变化范围宽、输出波形质量高、均流效果好、过载与短路能力强、带不同性质负载能力强等优良的综合性能。更多还原

【Abstract】 The circumstance and the development of the parallel inverters on circuit construction and control technology are discussed in this paper. The parallel of inverters provides a reliable AC power supply and a flexible capacity. The static inverters parallel using a common voltage regulator with three-state discrete pulse modulation (DPM) hystersis current control is an easy way to realize parallel system.The parallel inverter system using a common voltage regulator is made of three inverter modules with high frequency pulse DC link and DPM current control. Each inverter module is cascaded by a circuit with duty cycle extended active clamp forward style high frequency pulse DC link and a DC/AC inverting bridge. The control strategy of voltage mode PWM forward-back is adopted by the former, and the control strategy of three-state DPM hystersis current control is adopted by the later. The operation principle of the inverters parallel using a common voltage regulator with three-state DPM hystersis current control is discussed, and current-sharing of the parallel inverter is analyzed with the simulation.A prototype for 3kVA 27VDC/115V400HzAC parallel aviation static inverter system using a common voltage regulator with three-state DPM hystersis current control is designed and successfully developed. The test results demonstrate that this prototype has excellent comprehensive performances such as small bulk, lower weight, high efficiency, high steady precision, fast dynamic response, wide range input voltage, good output waveforms, good effect on current-sharing strong over-load and short-circuit ability, and strong function with different nature load and non-linear load.更多还原