A Full Frequency-Dependent Cable Model for the Calculation of Fast Transients
A Full Frequency-Dependent Cable Model for the Calculation of Fast Transients
复制标题
用于计算快速瞬变的完整频率相关电缆模型
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
U. Schmidt
中科院分区：
文献类型：
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作者：
Abdullah Hoshmeh;U. Schmidt
与频率相关的电缆参数的计算对于模拟电力系统中的瞬态现象至关重要。瞬态的模拟比标称频率范围内电流和电压的计算更为复杂。该模型必须表示频率依赖性和电缆线路的波传播行为。引入的模型结合了用于确定频率相关参数的改进的子导体方法和 PI 截面波传播模型。亚导体方法考虑了频率范围高达几兆赫兹的所有导体的集肤效应和邻近效应。分导体法可产生准确的结果。电缆模型的波传播部分基于级联 PI 截面模型。模态变换技术已用于时域计算。相关模态变换矩阵的频率相关元素已用有理函数拟合。电缆参数的频率依赖性已使用矢量拟合算法再现，并已实现到每个 PI 部分的电阻-电感-电容网络（RLC 网络）中。所提出的完整模型已通过测量数据进行了验证。
The calculation of frequency-dependent cable parameters is essential for simulations of transient phenomena in electrical power systems. The simulation of transients is more complicated than the calculation of currents and voltages in the nominal frequency range. The model has to represent the frequency dependency and the wave propagation behavior of cable lines. The introduced model combines an improved subconductor method for the determination of the frequency-dependent parameters and a PI section wave propagation model. The subconductor method considers the skin and proximity effect in all conductors for frequency ranges up to few megahertz. The subconductor method method yields accurate results. The wave propagation part of the cable model is based on a cascaded PI section model. A modal transformation technique has been used for the calculation in the time domain. The frequency-dependent elements of the related modal transformation matrices have been fitted with rational functions. The frequency dependence of cable parameters has been reproduced using a vector fitting algorithm and has been implemented into an resistor-inductor-capacitor network (RLC network) for each PI section. The proposed full model has been validated with measured data.