Accurate Electromagnetic Transient Simulations of HVDC Cables and Overhead Transmission Lines
Accurate Electromagnetic Transient Simulations of HVDC Cables and Overhead Transmission Lines
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高压直流电缆和架空输电线路的精确电磁瞬态仿真
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
L. M. Wedepohl
中科院分区：
文献类型：
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作者：
H. D. Silva;A. Gole;L. M. Wedepohl
本文介绍了提高架空线路和地下电缆时域仿真模型低频精度的三种不同方法。在前两种方法中，对相域模型曲线拟合过程中逼近的有理函数的函数形式进行了适当的修改，使模型在直流频率下具有很好的精度。通过与分析结果的比较，量化了低频拟合不准确时的仿真误差。这些程序在数值上是高效和稳健的。这两种方法还与第三种精度较低的方法进行了比较，该方法只是在模型中添加串联直流电阻来校正直流响应。给出了地下电缆系统的仿真结果。本文所做的改进有望用于高压直流输电系统的仿真。
This paper introduces three different procedures for improvements in the accuracy at very low frequencies of time domain simulation models for overhead lines and underground cables. In the first two methods, a suitable modification is introduced to the functional form of the rational function approximated in the curve fitting procedure for the phasedomain model, such that the model is perfectly accurate at dc frequency. By comparing with analytical results, the paper also quantifies the errors made in simulation when the fitting at very low frequencies is inaccurate. These procedures are numerically efficient and robust. These two methods are also compared against a third less accurate method which simply adds a series dc resistor in the model to correct the dc response. Simulation results are presented for underground cable systems. The modifications introduced in the paper are expected to be useful in the simulation of High Voltage Direct Current (HVDC) transmission systems.