感应滤波对新型换流变压器换相电抗的影响

摘要

针对感应滤波技术是否影响新型换流变压器换相电抗的问题,简要论述了新型换流变压器感应滤波的基本原理,在此基础上分析了新型换流变压器换相电抗的特征,并建立全新的计算新型换流变压器换相电抗的数学模型和仿真模型.结果表明,采用感应滤波技术后换相电流的基波及各次谐波分量流通回路不完全相同,因此传统的计算方法不再适用于计算新型换流变压器换相电抗.全新的换相电抗求解方法,不仅可以正确求解新型换流变压器的换相电抗,也适用于传统换流变压器换相电抗的计算;感应滤波技术能够使新型换流变压器换相电抗减少三分之二左右.%This paper firstly introduced the basic principles of the induction filtering technology. Then, it analyzed the characteristics of the commutation reactance of the novel converter transformer, to answer whether the induction filtering technology impacted on the commutation reactance. A mathematic model and a simulation model were built to calculate the commutation reactance. The results show that the fundamental wave and the harmonics of the commutation current have not identical circuit owing to the inductive filtering technology, and thus traditional calculation methods may not be applicable any longer. This mathematic model not only applies to the novel converter transformer, but also applies to the traditional converter transformer. The inductive filtering technology can help reduce the commutation reactance of the novel converter transformer by about two-thirds.