基于Dymola及Modelica语言的带均衡电抗器的12脉波变压整流器的建模与仿真
2018-08-09徐晨
摘 要:现今,整流技术已在航空航天技术中得到广泛应用,故此对带均衡电抗器的 12 脉波变压整流器进行了主要研究,并且详细分析了均衡电抗器在 12 脉波整流电路中的作用和工作原理,利用可支持各种物理系统建模的Dymola 软件所提供的各类元件以及Modelica语言建立了带均衡电抗器的 12脉波变压整流器的仿真模型,对该系统进行建模及仿真仿真。仿真结果表明,该模型可以使两组整流桥负载达到均衡,正确反映出均衡电抗器在系统中的作用,并且体现出12脉波整流的优越性。
关键词:均衡电抗器;12脉波整流;变压整流器;Dymola;Modelica
Modeling and Simulation of 12-pulse transformation rectifier with equilibrium reactor Based on Dymola and Modelica language
(1.China COMAC Shanghai Aircraft Design and Research Institute,ShangHai,201210,China
2. College of Automation,NorthwesternPolytechnicalUniversity,Xi'an Shanxi 710072,China)
Abstract: Now, multi-pulse rectifier has been widespread used in aerospace field. The paper introduces 12-pulse transformation rectifier with equilibrium reactor. The effect and principle of equilibrium reactor in rectifying circuit was analyzed. The simulation model of 12-pulse transformation rectifier with equilibrium reactor was modeled in Modelica language and Dymola software which can be applicated in a variety of physical systems. The result indicates that the model can keep the loads of two sets of rectifying bridge equilibrium, it reflect the effect of equilibrium reactor in the system and the advantage of 12-pulse transformation rectifier.
Key words: equilibrium reactor; 12-pulse rectification; transformation rectifier; Dymola;Modelica
0.引言
多脈波整流电路指的是将两个或多个三相桥式整流电路进行移相多重联接,使直流侧输出电压脉波数多于6个的整流电路,该电路在降低输出电压纹波的同时能够抑制输入电流谐波。根据整流输出电压脉波数不同,多脉波整流可以分为 12 脉波、18 脉波、24 脉波等;根据交直流侧是否隔离,可以分为基于隔离变压器式和基于自耦变压器式。图1给出了一种多脉波整流技术的简单分类方法[1]。多脉波整流技术的主要优势在于通过变压器的移相作用,将原来的三相供电转化为多相供电,增加直流侧输出电压的脉波数,降低其纹波,并且增加交流侧输入电流的阶梯数,使其更加接近正弦波,谐波降低到可接受水平,提高功率因数。因此多脉波整流技术在电机调速系统、航空电源系统、电化学加工等工业场合得到了广泛应用。……
