正弦激励下铁磁材料的损耗分离与预测的研究

发布时间：2018-06-25 18:22

本文选题：铁磁材料 + 变压器　；参考：《华北电力大学》2017年硕士论文

【摘要】：我国能源分布和经济发展不均衡,需要将经济相对落后的西部地区的电力经过远距离的传送到达东南经济比较发达的地区,这也推动了我国电力行业的发展。随着大容量高压传输技术的发展,大量的电力设备需要投入到输电线路中。上述电力设备中大量的使用了铁磁材料,例如特别是硅钢片,而硅钢片的损耗、磁化特性等对变压器、电抗器的电磁特性及温升有着十分重要的影响。对铁磁材料的损耗进行损耗分离研究,将变压器的铁耗进行细化分析可以为变压器的设计制造提供重要的参考性。在国家自然科学基金项目“非正弦周期激励下硅钢的损耗和磁化特性研究”(51577066)和国家自然基金项目“基于材料性能工程模拟与定点谐波平衡法的电力变压器直流偏磁数值仿真及有效性验证”(51307057)的资助下,本文在Bertotti的经典损耗模型的基础上通过改变频率和改变磁通密度对铁心损耗进行分离研究。并且根据Bertotti的损耗模型进行提出了一种新的损耗分离方法,并基于该方法进行了损耗的预测。此外,为了验证损耗分离方法的正确性,通过直流磁特性测试系统测试样本硅钢片的纯磁滞损耗。最后对产品级叠片铁心模型进行相关的实验测量,基于Bertotti的损耗模型对才产品级变压器的铁心损耗进行分离,并与相对应的材料的损耗分离结果进行对比。最后,根据材料的损耗以及变压器铁心模型的损耗关系,对变压器的损耗系数进行了相关的分析。
[Abstract]:The energy distribution and economic development of our country are not balanced, it is necessary to transfer the electric power of the western region which is relatively backward in economy to the more developed area of the southeast economy through the long-distance transmission, which also promotes the development of the electric power industry in our country. With the development of high-voltage transmission technology, a lot of power equipments need to be put into transmission line. Ferromagnetic materials, such as silicon steel sheet, are widely used in the above-mentioned power equipment, and the loss and magnetization characteristics of silicon steel sheet have a very important effect on the electromagnetic characteristics and temperature rise of transformer and reactor. The loss separation of ferromagnetic materials is studied, and the detailed analysis of iron loss of transformers can provide important reference for the design and manufacture of transformers. Study on loss and magnetization characteristics of Silicon Steel under Non-sinusoidal Periodic excitation under National Natural Science Foundation (51577066) and Power Transformer DC based on material performance Engineering Simulation and Fixed-point Harmonic balance method in National Natural Science Foundation Project (51577066) Magnetic bias numerical Simulation and validation "(51307057), On the basis of Bertotti's classical loss model, the separation of core loss is studied by changing the frequency and flux density. Based on Bertotti's loss model, a new loss separation method is proposed, and the loss is predicted based on this method. In addition, in order to verify the correctness of the loss separation method, the pure hysteresis loss of the sample silicon steel sheet was measured by the DC magnetic characteristic test system. Finally, the core loss of the product grade transformer is separated based on Bertotti's loss model, and the results are compared with those of the corresponding material. Finally, according to the loss of material and the loss of transformer core model, the loss coefficient of transformer is analyzed.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM271

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