首页> 外文会议>IEEE International Conference on Environment and Electrical Engineering;IEEE Industrial and Commercial Power Systems Europe >Calculation of Voltage Unbalance in Transmission Systems Due to AC Railway Operation: A Simplified Methodology Using Network Admittance Matrix
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Calculation of Voltage Unbalance in Transmission Systems Due to AC Railway Operation: A Simplified Methodology Using Network Admittance Matrix

机译:交流铁路运营引起的输电系统电压不平衡的计算:使用网络导纳矩阵的简化方法

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Modern AC railway is well known for introducing large asymmetrical loads which can lead to considerable levels of voltage unbalance in power transmission systems. Unbalance assessment is often limited to a single traction substation contribution and only at the connection point. However, as unbalance propagates from the railway feeding nodes through the electric network, interactions between different traction loads can be significant, and therefore should not be neglected. Three-phase power flow calculations implemented by power systems software can be used for this kind of studies. As an alternative, this paper proposes a simplified but efficient methodology for calculating voltage unbalance through the entire system due to one or multiple ac traction loads. The main idea behind this approach is the simplification of the power flow problem into a system of linear equations which can be solved using the admittance matrix of the network. The good accuracy and the straightforward application of the suggested method can make it particularly useful in planning activities of railway operators.
机译:众所周知,现代交流铁路引入了较大的不对称负载,这会导致输电系统中相当大的电压不平衡水平。不平衡评估通常仅限于单个牵引变电站的影响,并且仅在连接点进行。但是,由于不平衡从铁路馈电节点通过电网传播,不同牵引负载之间的相互作用可能很明显,因此不应忽略。由电力系统软件实现的三相潮流计算可用于此类研究。作为替代方案,本文提出了一种简化而有效的方法,用于计算由于一个或多个交流负载引起的整个系统的电压不平衡。这种方法背后的主要思想是将潮流问题简化为线性方程组,可以使用网络的导纳矩阵进行求解。所建议方法的良好准确性和直接应用性使其在铁路运营商的活动计划中特别有用。

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