| 市域铁路牵引电缆贯通供电方案及潮流算法 |
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| 引用本文： | 刘炜,刘雪晴,王辉,李群湛,刘童童,潘卫国.市域铁路牵引电缆贯通供电方案及潮流算法[J].西南交通大学学报,2021,56(4):689-697. |
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| 作者姓名： | 刘炜 刘雪晴 王辉 李群湛 刘童童 潘卫国 |
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| 基金项目： | 国家重点研发计划（2017YFB1201002-07） |
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| 摘 要： | 研究了市域铁路牵引电缆贯通供电方案，该方案全线贯通式供电，设置一主一备两个主变电所，在主变电所内设置同相供电装置. 对贯通式供电时双边供电、单边供电下供电臂距离的设置进行了建模求解，模型以电压损失作为约束条件，通过逐渐增加列车数量的方式，求得供电臂所能承担最大列车数量，进一步得到供电臂距离的可行值，为牵引变压器位置的设置提供参考和校验. 采用基于线路的牵引供电系统建模，将牵引供电系统分为电缆层和牵引层，提出适用于牵引电缆贯通供电的分层交互迭代潮流算法. 该算法在层内进行潮流求解，同时层之间进行变量取值修正，以实现交互迭代，能够达到矩阵降阶、提高计算效率的目的. 在本文案例分析中，相较于传统供电方案，牵引电缆贯通供电方案再生制动能量利用率提升至99.15%，每年通过再生制动能量利用可以节省的电费为2 955万元，一次性投资可以节省大约13 672万元.
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| 关 键 词： | 铁路 牵引电缆贯通供电 供电距离 分层交互迭代潮流算法 再生制动 |
| 收稿时间： | 2020-03-05 |
Continuous Power Supply Scheme and Power Flow Algorithm of Traction Cables for Urban Railways |
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| LIU Wei,LIU Xueqing,WANG Hui,LI Qunzhan,LIU Tongtong,PAN Weiguo.Continuous Power Supply Scheme and Power Flow Algorithm of Traction Cables for Urban Railways[J].Journal of Southwest Jiaotong University,2021,56(4):689-697. |
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| Authors: | LIU Wei LIU Xueqing WANG Hui LI Qunzhan LIU Tongtong PAN Weiguo |
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| Abstract: | Continuous power supply scheme of traction cables is explored for urban railways, in which the power runs through the whole line, and two main substations are set with the same phase power supply devices, one for primary use and one for standby. The feeding section distance is modeled and solved in the cases of the unilateral and bilateral continuous power supply. The model takes the voltage loss as a constraint condition, and the maximum number of trains that the feeding section can supply is obtained by solving the model in a way of gradual increase in the number of trains. Further, the allowable value of the feeding section distance is calculated, which provides a reference for the position setting and checking of the traction transformer. To develop a layered power flow algorithm with interactive iteration, the line-based traction power supply system is modeled, and the traction power supply system is divided into the cable layer and traction layer. In this algorithm, the power flow is solved within the layer, and the variable values are modified between the layers to realize interactive iteration and obtain the final calculation results. This algorithm has the merits of reducing matrix order and increasing computational efficiency. The case analysis shows that in contrast to the traditional power supply scheme, the continuous power supply scheme can increase the utilization rate of regenerative braking energy by 99.15%, and reduce the annual electricity cost by 29.55 million yuan with the use of regenerative braking energy, and the non-recurring investment by 136.72 million yuan. |
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