摘要
根据三相四线制发电机整流桥系统的等效电路,应用状态空间平均法推导了四线制二极管整流桥在连续导通模式下的动态平均值模型,给出了换相角的解析表达式。分别应用整流桥的开关模型在Matlab/Simulink软件环境中对平均值模型进行了仿真验证,并应用发电机三相四线制二极管整流桥负载系统对平均值模型进行了实验验证。仿真与实验结果表明,文中的平均值模型能够描述整流桥的主要稳态和瞬态特征,相应直流电压的误差较小,从而验证了模型的有效性。文中给出的平均值模型可以用于此类发电机(变压器)整流桥系统的建模、阻抗特性分析及小扰动下稳定性分析。
Based on the equivalent circuit of a 3-phase 4-wire generator-rectifier system, this paper presents the dynamic average-value model (AVM) of 4-wire diode-bridge rectifier under continuous conduction mode (CCM) using state-space averaging method. The AVM is validated by the corresponding switching model of rectifier by simulations in the Matlab/Simulink environment, and by a hardware test system composed of a synchronous generator and its 3-phase 4-wire diode-bridge rectifier load. The results show that the AVM can captures the key steady-state and transient characteristics of the rectifier, and the agreement of DC voltage between the AVM, the switching model, and the hardware circuit are well. The model presented herein can be used for modeling, impedance mapping, and stability assessment with small disturbance of such generator (transformer) -rectifier systems.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第11期102-107,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金委员会创新研究群体科学基金(50721063)
国家自然科学基金(50737004
50607020)资助项目
关键词
三相四线制
二极管整流桥
状态空间平均法
动态平均值模型
3-phase 4-wire system, diode-bridge rectifier, state-space averaging method, dynamic average-value model