With the expansion of the scale and complexity of the distribution network,the electromechanical transient simulation of the distribution network based on the traditional quasi-steady state assumption can no longer meet the current demand,and more accurate electromagnetic transient simulation calculation is needed.In order to improve the efficiency of electromagnetic transient simulation for large-scale distribution system,a new method based on the Homotopy-Padé algorithm is proposed in this paper.Firstly,the electromagnetic transient model of distribution system is established,including transformer electromagnetic transient model,distribution line electromagnetic transient model and induction motor electromagnetic transient model considering connection mode.Then,a numerical algorithm based on Homotopy-Padé approximation is proposed,which has the advantages of high precision,strong stability and explicit format,and is more suitable for large-scale electromagnetic transient simulation than the traditional implicit ladder method.Finally,a framework for electromagnetic transient simulation of distribution network system based on Homotopy-Padé algorithm is constructed.An actual distribution network example is used for comparing the results of the proposed algorithm with the conventional algorithm.It is verified the proposed algorithm has the advantages of high precision,good stability and explicit integral class method,so it is easy to deal with discontinuity problem,the calculation efficiency is improved,and is more suitable for large-scale electric power electronic electromagnetic transient simulation calculation.
维普
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