三次谐波磁场调制机理及其在变压器节能中的应用

The Fundamental Principles of Third-harmonic Flux Modulation and Its Application in Energy Saving in Transformers

本文对变压器节能提出了一个崭新的观点,即通过三次谐波磁场调制机理来降低变压器的铁耗和励磁电流。文中认为当在变压器基波磁通中加入某一幅值的三次谐波磁通后,能显著地降低铁耗和励磁电流。作者对在变压器中加三次谐波滤波器和三次谐波电源分别进行了实验研究。为便于比较,还分别绘出了实测的铁耗和励磁电流曲线,同时对将来实际应用的可能性作了乐观的展望。

A new method for reducing core loss and excitation current in transfor- mers that utilizes the fundamental principles of third-harmonic flux modulation is proposed in this paper. The study shows that the third-harmonic flux with a certain value added to the fundamental flux can obviously reduce both core loss and excitation current. Experimental study with third-harmonic filters as well as with third-harmonic power sources were conducted. For comparison the experi- mental curves of core loss and excitation current are given respectively, The possi- bility of its application in the near future is prospected optimistically.