摘要
提出了考虑变压器铁磁特性的有载调压变压器无暂态切换理论。该方法用双曲函数表达式来拟和变压器的铁磁特性,采用傅立叶变换的方法得出考虑铁磁特性的激磁电流表达式。并利用激磁电流导出变压器负载运行时原副边电流的表达式。通过对这些表达式的分析可知,在该文提出的条件下进行有载调压,不会产生暂态过程。在变压器铁磁特性不明显的情况下推导出的传统有载调压变压器无暂态切换理论只是文中理论中的一个特例。仿真及实验结果证明了文中提出理论的正确性。
In this paper, we had developed a theory that can prevent transient processes during tap change, taking into account the ferromagnetic characteristics of the load-ratio voltage transformer. The ferromagnetic characteristics of the transformer were fitted by a hyperbolic function. Then we have deduced the expression of the exciting current which has considered the ferromagnetic characteristic of the transformer by using Fourier transform. We also have deduced the expressions of the primary current and secondary current. Through the analysis of these expressions, we have gotten the condition of the tap change at which there will not have any transience process in the load-ratio transformer. The traditional theory of tap change of the load-ratio transformer which has not taken the ferromagnetic characteristic into account is a special example of the theory presented in this paper. The results of the simulation and the experiment have shown the theory described in this paper is correct.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2003年第6期170-174,共5页
Proceedings of the CSEE
