变压器绕组快速暂态仿真的分裂算法

Diakoptics-based Algorithm for Fast Transient Simulation of Transformer

在高频激励源作用下,变压器应采用分布参数模型.准确而高效的变压器快速暂态仿真方法是目前研究的重点问题.基于变压器的分布参数电路模型,研究了变压器快速暂态仿真的分裂算法.在一段时间间隔内,将变压器集中参数电路分解成若干个子电路,根据各独立子电路在该时间段内的暂态过程及其外端子冲激响应函数,建立了子电路的动态等效电源模型,并以此建立了变压器的离散时域动态等效电路模型.对该模型变量进行合理的编号,可以利用三对角线方程组的追赶法求解仿真模型,从而提高了仿真效率.仿真结果表明:提出的方法具有较高的准确性,且计算量少.

The transformer distributed parameter model should be adopted when inspired by high frequency source.Accurate and efficient fast transient simulation method of transformer is the focal problem.The aim of the paper is to study diakoptics used in Transformer Fast Transient Simulation,based on the distributed parameter circuit model of the transformer.In an interval,the lumped parameter circuit of transformer is divided into several sub-circuits.In the period,according to the independent transient process of sub-circuit and the impulse response function of outside terminal,the dynamic equivalent source model is established,and thus dynamic equivalent circuit model of transformer is formed.Model variable is generated properly,simulation model is solved by three diagonal equation method,which improve the simulation efficiency.Simulation results show that the proposed method has higher accuracy and less calculation.