AI 中文总结
针对山区牵引供电系统与电网耦合问题，现有研究不足。本文提出集成PFC模型及线性化方法，通过构建节点导纳矩阵、解决功率注入问题等步骤建立相关方程和模型，经数值模拟验证了其对耦合系统的必要性、准确性和效率。
AI 中文摘要
在山区，牵引负荷在含可持续能源的长链弱电网中占比显著，牵引供电系统与电网的相互作用愈发明显。集成潮流计算（PFC）方法及其线性化模型对电网 - 牵引网络联合规划很重要。但现有研究对动车组端口负载特性和牵引变压器连接角特性不足，耦合系统中缺乏有效PFC或线性化PFC方法。本文提出AT牵引网络 - 电网耦合系统的集成PFC模型及线性化方法。先构建耦合系统节点导纳矩阵，通过合并接触线节点和轨道节点解决功率注入方程无法处理动车组端口负载问题，建立耦合系统集成PFC方程，开发混合相线性解耦潮流模型。特定区域的数值模拟证明了耦合系统集成PFC的必要性，验证了线性化模型的准确性和效率。
英文摘要
In mountainous regions where traction loads constitute a significant portion of a long-chain weak power grid (PG) with sustainable energy, the interaction between the traction power supply system and the PG becomes increasingly evident. The integrated power flow calculation (PFC) method and its linearized model are quite important for the PG - traction network (TN) joint planning. However, existing research on the port load characteristics of the EMUs and the connection angle characteristics of traction transformers is insufficient, and there is a lack of effective methods for PFC or linearized PFC in systems that couple the PG with the traction network. To fill this gap, this paper proposes an integrated PFC model for the AT TN - PG coupled system, along with a linearized method. Firstly, according to the relationship of the phases between the PG and the AT traction network, the node admittance matrix of the coupled system has been constructed. Then, the issue of power injection equations being unable to deal with the EMUs port load is resolved by merging the contact line node and the rail node. Subsequently, the integrated PFC equations for the coupling system are established. Next, a hybrid phase linear decoupled power flow model for the coupling system is developed, employing the correspondence between the phases of the PG and the TN, as well as the phase angle differences among various nodes and branches. Numerical simulations conducted in a specific region demonstrate the necessity of an integrated PFC for the coupled system and validate both the accuracy and efficiency of the linearized model.
Comments26 pages. Accepted by CSEE Journal of Power and Energy Systems
DOI：10.17775/CSEEJPES.2025.10350
