带三相四线制二极管整流桥负载的同步发电机的等效电路模型  

Equivalent circuit model of synchronous generator with 3-phase-and-4-wire diode-bridge rectifier load

作　　者：魏克银[1] 刘德志[1] 欧阳斌[1] 翟小飞[1] 晏明[1] 

机构地区：[1]海军工程大学电力电子技术研究所,武汉430033

出　　处：《海军工程大学学报》2010年第3期11-15,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(50607020;50721063)

摘　　要：带三相四线制二极管整流桥负载的发电机始终处于非对称运行状态。为了进行系统性能的解析分析,将发电机的d、q轴变量分解为低频和高频分量分别处理,忽略了转子回路对高频电流的电阻及阻尼绕组对低频分量的作用,假定交、直轴超瞬态电抗相等,建立了同步发电机的等效电路模型,并给出了稳态时等效发电机的Park方程、相量图及稳态量的计算方法。分别通过发电机整流桥硬件系统的试验及在EMTDC软件环境下详细模型的仿真对等效电路模型进行了验证,结果证明了其正确性。所给出的等效电路模型可应用于此类系统的性能分析与小扰动稳定性研究。A synchronous generator with a 3-phase-and-4-wire diode-bridge rectifier load operates in an asymmetric mode all the time.In order to investigate the performance,the d- and q-axis variables of 3-phase generator were decomposed into low- and high-frequency components and treated respectively,neglecting the effect of high-frequency currents on the rotor resistances and that of the damper windings on low-frequency components.With the d-axis sub-transient reactance equal to the q-axis one,the equivalent circuit model of synchronous generator was established.The Park′s equations,phasor diagram and calculation method of steady variables of equivalent generator were also presented.The equivalent circuit model was validated by the experiment on a hardware system and simulation of the detailed model in EMTDC environment.The results prove that the equivalent circuit model can be used for the performance analysis and the small-signal disturbance stability assessment in such systems.

关 键 词：同步发电机 三相四线制 二极管整流桥 等效电路模型 

分 类 号：TM301.3[电气工程—电机]