三相多芯柱变压器暂态仿真新模型

摘要

在变压器等效电路基础上提出了新的三相多芯柱变压器暂态仿真模型.仿真模型由基本的电路元件构成,不需要编写接口程序,应用方便；模型结构简单,所使用的电感参数少；新的模型中漏感参数和反应铁心磁路的励磁电感参数互相独立,不涉及病态矩阵的运算,计算更为稳定.通过三相三柱式和三相五柱式变压器的磁等值回路,讨论了模型中各参数的确定方法.通过与UMEC模型的比较验证了所提模型的准确性.%A new transient simulation model of three-phase multi-legged transformer based on its equivalent circuit is proposed. The model is composed of basic circuit elements; no interface is needed and is convenient to use; it has a simple structure and less inductance for magnetic flux circuit representation. The leakage inductance is independent of excitation inductance in the proposed model, and ill-conditioned matrix is not involved in the computation, making the simulation more stable. Based on the magnetic equivalent circuit of three-phase three-limb and three-phase five-limb transformer, the method for determining parameters of new model is discussed. The proposed model is verified through comparison between the transient performance of UMEC model and the proposed model.