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首页> 外文会议>Computers in Railways X: Computer System Design and Operation in the Railway and other Transit Systems; WIT Transactions on Built Environment; vol.88 >A mixed AC/DC model for railway power systems
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A mixed AC/DC model for railway power systems

机译：铁路电力系统的AC / DC混合模型

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摘要

A method to study railway power supply systems with AC power distribution networks and DC power feeding is presented in this paper. The aim of this work is to obtain a DC model of the whole system in which AC networks are converted into equivalent DC ones.rnRelationships between AC and DC quantities on both sides are set using the equations of multiple bridge rectifiers as described in the literature. Particular DC models for transformers and 3-phase lines are used to represent the corresponding voltage drops. Specific base quantities are used for AC and DC parts of the circuit in order to obtain a simplified circuit.rnThis model is used to solve a DC load flow problem. Real values of voltages, intensities and power flows can be obtained by using the proper base quantities. Additionally a correction has to be made to improve the power flow results calculated previously, due to pure resistive representation of transformers and AC lines, so a fine approximation is achieved.
机译：提出了一种研究具有交流配电网和直流供电的铁路供电系统的方法。这项工作的目的是获得将交流网络转换为等效直流网络的整个系统的直流模型。使用文献中描述的多桥整流器方程式，设置两侧交流和直流量之间的关系。变压器和三相线路的特定DC模型用于表示相应的电压降。为了获得简化的电路，将特定的基本数量用于电路的交流和直流部分。该模型用于解决直流潮流问题。电压，强度和功率流的实际值可以通过使用适当的基本数量获得。另外，由于变压器和AC线的纯电阻表示，必须进行校正以改善先前计算的潮流结果，因此可以实现精细的近似。

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