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基于对偶原理的三相五柱式Sen变压器准稳态模型
周超, 韩松, 卜亮, 潘宇航
贵州大学 电气工程学院,贵州 贵阳 550025
摘要:
为了进一步研究不同铁芯结构的Sen变压器(ST)的外部特性,提出了一种基于对偶原理的三相五柱式ST准稳态模型。首先,通过分析三相五柱式ST的磁路模型,采用对偶原理建立了考虑铁芯涡流效应和磁路耦合效应的等效计算模型。其次,根据三相五柱式ST与外接系统的电气连接关系,推导了其各绕组电压和电流的电气解析模型。综合上述模型,可得磁路与电路耦合的三相五柱式ST准稳态模型。将该模型在潮流控制方面与已有文献进行比较,在故障分析方面与MATLAB/Simulink仿真模型进行比较,结果均表明了所提模型的有效性。此外,在不平衡负载功率下比较不同铁芯结构的ST的输出电流不平衡度,结果表明三相五柱式ST更适用于不平衡负载工况。
关键词:  对偶原理  三相五柱式Sen变压器  准稳态模型  潮流控制  模型
DOI:10.16081/j.epae.202202032
分类号:TM41
基金项目:贵州省普通高等学校科技拔尖人才支持计划 (2018036);贵州省科学技术基金资助项目([2019]1100,[2021]277);贵州省优秀青年科技人才项目([2021]5645)
Quasi steady-state model of three-phase five-limb ST based on duality principle
ZHOU Chao, HAN Song, BU Liang, PAN Yuhang
The Electrical Engineering College, Guizhou University, Guiyang 550025, China
Abstract:
In order to further study the external features of ST(Sen Transformer),the quasi steady-state model of three-phase five-limb ST based on the duality principle is proposed. Firstly, by analyzing the magnetic circuit of the three-phase five-limb ST, the duality principle-based equivalent calculation model considering the eddy current effect of iron-core and the magnetic-circuit coupling effect is established. Then, according to the electrical connection between the three-phase five-limb ST and the external system, the electrical analysis model of the voltage and current of each winding is deduced. Combining the above models, the quasi steady-state model of three-phase five-limb ST with magnetic-circuit coupling is obtained. The proposed model is compared with the existing literature in terms of power flow control, and compared with the MATLAB/Simulink simulation model in terms of fault analysis, both of the results can verify the effectiveness of the proposed model. Besides, the output current unbalance degree of ST with different core structures is compared under unbalanced load conditions, the result shows that the three-phase five-limb ST is more suitable for the unbalanced load conditions.
Key words:  duality principle  three-phase five-limb Sen transformer  quasi steady-state model  power flow control  models

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