With the large-scale integration of new energy sources and the application of new power electronic de-vices,the complexity of power system digital simulation continues to increase,and the electromagnetic transient characteristics have become increasingly complex.When conducting electromagnetic transient simulation in pow-er electronic systems,there are many discontinuous phenomena and state mutations.The variable step fine inte-gration multi-step method can achieve the required calculation accuracy by adjusting the step size during calcula-tion.To overcome numerical fluctuations caused by sudden changes in state variables in discontinuous situations and further optimize electromagnetic transient simulation,the precision integration method based on Adams lin-ear multi-step method is used,and adaptive approximation of non-uniform terms through error estimation is achieved.A study is conducted on the method of numerical simulation using theoretical analysis on the MAT-LAB/Simulink simulation platform.The results show that the proposed algorithm can effectively improve the ef-ficiency and accuracy of electromagnetic transient calculation.It can fill the gap in practical applications where the traditional critical damping adjustment (CDA) algorithm ignores the discontinuity problem.
关键词
电力电子/电磁暂态/变步长精细积分法/线性多步法/算例仿真/临界阻尼调整法
Key words
power electronic/electromagnetic transient/variable step fine integration method/linear multi-step method/example simulation/critical damping adjustment method
维普
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