输电线路工频动态相量模型在半波长交流输电系统机电暂态仿真中的应用研究

发布时间：2018-05-31 17:49

本文选题：半波长 + 电磁暂态　；参考：《中国电机工程学报》2017年18期

【摘要】：为了在机电暂态仿真中准确模拟半波长交流线路的波传输动态特性,提出将交流线路的动态相量模型应用于半波长输电系统仿真。动态相量模型在机电暂态仿真中得以应用的关键是仿真精度和仿真步长问题。半波长线路区外故障时,可以直接应用半周波固定步长进行机电暂态仿真;而当模拟半波长线路区内故障时,若仍采用半周波固定步长,则需应用线性插值的近似方法计算注入电流源。为保证仿真精度,并兼顾仿真速度,提出采用变步长仿真方法用于半波长线路区内故障。以电磁暂态仿真结果为基准,点对网半波长交流输电系统算例表明,动态相量模型比传统的交流线路稳态模型具有更高的仿真精度,且变步长仿真方法优于线性插值近似法。
[Abstract]:In order to accurately simulate the dynamic characteristics of half-wavelength AC transmission line in electromechanical transient simulation, the dynamic phasor model of AC line is applied to half-wavelength transmission system simulation. The key to the application of dynamic phasor model in electromechanical transient simulation is the accuracy and step of simulation. The electromechanical transient simulation can be carried out directly by using the fixed step size of half Zhou Bo when the fault is outside the half-wavelength transmission line, and when the fault is simulated in the half-wavelength line area, if the fixed step size of the half-length Zhou Bo is still used, An approximate method of linear interpolation is used to calculate the injection current source. In order to ensure the accuracy of the simulation and take into account the simulation speed, the variable step size simulation method is proposed for the fault in the half-wavelength transmission line. Based on the electromagnetic transient simulation results, a point-to-network half-wavelength AC transmission system example shows that the dynamic phasor model has higher simulation accuracy than the conventional AC line steady-state model, and the variable step size simulation method is superior to the linear interpolation approximation method.
【作者单位】：天津大学;电网安全与节能国家重点实验室(中国电力科学研究院);
【基金】：国家电网公司科技项目(JS71-16-001,XT71-16-001)~~
【分类号】：TM743

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