摘要
目前在谐波分析与计算中,有多种变压器模型供选择,但各种模型适应于哪种情况,且哪种模型更为准确,并没有公认的结论。文中根据变压器谐波有功损耗与谐波有效电阻之间的对应关系,同时考虑到绕组导线内涡流的去磁效应对漏抗的影响,提出一种建立变压器谐波模型的方法。以此为参考模型,对常用的六种变压器谐波模型进行理论分析,并对两类变压器实例进行计算,验证目前常用变压器谐波模型的适用性,并根据计算结果推荐模型5和模型6作为谐波分析与计算时的变压器模型。
Many transformer models are used in power system for harmonic calculation and analysis, but no one is widely accepted considering accuracy and applicability. In this paper, by analyzing the relationship between the har- monic real power loss and harmonic resistance, a novel transformer model for harmonic analysis is proposed. The influ- ences of demagnetization effect on leakage reactance are taken into account in the proposed transformer model. In order to study the validity and applicability of transformer models for harmonic analysis in power system, two case studies are conducted to compare the proposed transformer model with the other six existing ones. As a result, two transformer models are recommended to be used in harmonic analysis and calculation due to their accuracy.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2013年第2期103-108,共6页
Proceedings of the CSU-EPSA
关键词
变压器模型
谐波分析
频率特性
有功损耗
transformer model
harmonic analysis
frequency characteristics
active loss
