三相电压对称跌落时无刷双馈发电系统研究  

Research on Brushless Doubly Fed Power Generation System With Three-phase Voltage Symmetrical Drop

作　　者：董猛 王群京[2,3] 张茂松[1,4] 胡存刚[1,3] DONG Meng;WANG Qun-jing;ZHANG Mao-song;HU Cun-gang(Anhui University,Hefei 230601,China;不详)

机构地区：[1]安徽大学电气工程与自动化学院院,安徽合肥230601 [2]安徽大学高节能电机及控制技术国家地方联合实验室,安徽合肥230601 [3]安徽大学教育部电能质量工程研究中心,安徽合肥230601 [4]安徽大学安徽省工业节电与用电安全实验室,安徽合肥230601

出　　处：《电力电子技术》2022年第7期32-36,共5页Power Electronics

基　　金：国家自然科学基金(51637001)。

摘　　要：针对无刷双馈发电机(BDFG)在三相电压对称跌落时的控制问题,提出了一种解决方案。首先,根据发电机特点建立了简化降阶模型,分析常规控制策略下控制绕组电压与反电动势之间的不平衡关系,进而提出了一种改进的控制策略。在改进的控制策略中,将电网电压暂降视为一种扰动,并将电压指令值的变化趋势作为扰动补偿项添加到控制绕组指令值中,从而抵消了惯性环节的影响,使系统平稳运行。并通过实验验证了改进控制策略的可行性与有效性。Aiming at the control problem of brushless doubly fed generator(BDFG) when three-phase voltage drops symmetrically,a solution is proposed.Firstly,a simplified reduced order model is established according to the characteristics of the generator,the unbalanced relationship between the control winding voltage and the back electromotive force under the conventional control strategy is analyzed,and then an improved control strategy is proposed.In the improved control strategy,the grid voltage sag is regarded as a disturbance,and the change trend of the voltage command value is added to the control winding command value as a disturbance compensation item,so as to offset the influence of the inertia link and make the system run smoothly.The feasibility and effectiveness of the improved control strategy are verified by experiments.

关 键 词：无刷双馈发电机 三相电压对称跌落 扰动补偿 

分 类 号：TM31[电气工程—电机]