摘要
传输线模型是电力系统电磁暂态计算的重要组成部分,近几年的研究中提出了几种新的模型,其中A-Line模型是一种基于特征线法的双诺顿模型,相比于J.Marti和ULM模型,由于其计算过程中不需要对传播常数进行拟合,使架空线暂态计算更为简单。然而,该模型在处理频变参数的时域卷积计算中,采用端口电流代替沿线电流,将会产生一定的误差,且该误差与线路参数密切相关,然而现有文献并没有对该模型进行详细的误差分析和适用范围研究。通过对A-Line模型进行特征阻抗和传播常数误差公式推导及线路参数对特征阻抗和传播常数影响的讨论,对A-Line模型的误差及适用范围进行了分析,并通过算例验证了所得分析结论的正确性,为该模型的工程应用提供了理论依据。
The transmission line model is an important part of electromagnetic transient calculation of power system. Several new models have been proposed in recent years. A new model, called A-Line model, is a double Norton model based on the method of characteristics. In the calculation process of this model, it is not necessary to fit the propagation constant, which makes the calculation of overhead lines transient calculation simpler compared to the J. Marti and ULM models. However, when it deals with time domain convolution of frequency-dependent parameter, port currents of the lines are used instead of the currents along the lines, so there is a certain error for this model and such error relates to the parameters of lines. There are no detailed error analysis and application scope of this model in the existing papers. In this paper, the error formula of characteristic impedance and propagation parameter are deducted and the influence of line parameters on characteristic impedance and propagation constant are studied. So the error of A-Line model and its application scope are analyzed. The result of analysis was verified by some cases, which lays theoretical foundation for engineering application of this model.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2017年第3期22-29,共8页
Journal of North China Electric Power University：Natural Science Edition
基金
国家自然科学基金资助项目(51407073)
关键词
传输线
A-Line模型
特征线法
卷积计算
误差分析
transmission line
A-Line model
method of characteristics
convolution calculation
error analysis
