摘要
随着大规模新能源的并网以及新型电力电子器件的应用,电力系统数字仿真的复杂性不断提高,电磁暂态特性也变得日趋复杂。电力电子系统在进行电磁暂态仿真时,会遇到很多不连续现象和状态突变现象。在计算时,变步长精细积分多步法可以通过对步长的调节,使每一段步长达到要求的计算精度。为克服在不连续情况下由状态变量突变引起的数值波动,进一步优化电磁瞬态模拟,拟利用基于Adams线性多步法的精细积分法,并通过误差估计实现对非均匀项的自适应逼近。在MATLAB/Simulink仿真平台利用理论分析法进行数值模拟,结果表明,所提算法可以有效地提高电磁暂态计算效率和计算精度。该方法弥补了实际应用中传统的临界阻尼调整算法“忽略”不连续问题这一漏洞。
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.
作者
李娜
LI Na(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China)
出处
《电力学报》
2024年第3期221-230,共10页
Journal of Electric Power
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
power electronic
electromagnetic transient
variable step fine integration method
linear multi-step method
example simulation
critical damping adjustment method
