基于几何尺寸的变压器暂态简化模型用于电网分析和故障检测研究

2009 International Conference on Power Engineering, Energy and Electrical Drives Pub Date : 2009-03-18 DOI:10.1109/POWERENG.2009.4915148

E. Rahimpour, M. Bigdeli

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引用次数: 25

摘要

关于变压器的评价和研究，已经提出了各种各样的模型，但目前文献中还没有一个包含以下所有性质的模型:1-模型的参数可以通过几何尺寸计算，因此研究故障对模型的影响是可能的，而且不需要昂贵的测量。该模型在中瞬态频域的精度令人满意。3-模型简单，因此该模型的仿真容易、快速。该模型在网络分析中作为双端口单元是可行的。本文提出了一种简化暂态模型(STM)。以一台2.5 MVA 6300/ 420v三相变压器为测试对象，验证了模型的准确性和有效性。该变压器由盘式高压绕组和分层式低压绕组组成。最后，讨论了用该模型对变压器中一些重要故障的分析。

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Simplified transient model of transformer based on geometrical dimensions used in power network analysis and fault detection studies

Various models have been presented for evaluation and study of transformers, but a model including all the following properties has not been given in literature by now: 1- The parameters of the model can be calculated through geometrical dimensions, so investigation of a fault effect on the model is possible and it needs no costly measurements. 2- The accuracy of the model in the medium transient frequency domain is satisfactory. 3- The model is simple, so simulation of this model is easy and fast. 4- It is feasible to use the model as a two-port element in network analysis. Such a model is proposed in this paper as simplified transient model (STM). Accuracy and validity of the model is verified using a 2.5 MVA and 6300/420 V three-phase transformer as a test object. This transformer consists of a disk-type high-voltage winding and a layer-type low-voltage winding. Finally, analysis of some important faults in transformers using this model is discussed.

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2009 International Conference on Power Engineering, Energy and Electrical Drives

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