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树形双边贯通供电方案及其应用研究
晏寒1, 解绍锋1, 王辉1, 刘炜1, 张继雄2, 冯文杰2
1.西南交通大学 电气工程学院,四川 成都 611756;2.神华新朔铁路有限责任公司,内蒙古 鄂尔多斯 010300
摘要:
树形双边贯通供电方案能够取消牵引变电所出口和分区所处的电分相,提高系统的供电能力和再生制动能量利用率。介绍了树形双边供电方案的构造;针对树形双边贯通供电方案,以复线直接供电方式为例,推导了牵引网双边供电区间在复线牵引网上下行不并联、末端并联、全并联,以及端头供电臂单边供电等情况下的牵引网阻抗模型;以牵引变电所为单元,构建了树形双边贯通供电系统的全线链式电路模型,给出了潮流迭代方法;将树形双边贯通供电方案应用于某重载铁路贯通供电改造,对既有供电方案和树形双边贯通供电方案的牵引网等值阻抗和方案设计等进行了仿真及对比分析。仿真结果表明,相较于既有方案,树形双边贯通供电方案能够减小牵引网阻抗,提高供电能力,再生制动能量利用率提高至100%,每年通过利用再生制动能量节省的电费约为460. 58万元。
关键词:  电气化铁路  树形双边贯通供电  等值阻抗  链式电路模型  再生制动能量
DOI:10.16081/j.epae.202201028
分类号:TM922.3
基金项目:国家自然科学基金资助项目(51877182);四川省科技项目(21YYJC3324)
Research on tree bilateral continuous power supply scheme and its application
YAN Han1, XIE Shaofeng1, WANG Hui1, LIU Wei1, ZHANG Jixiong2, FENG Wenjie2
1.School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, China;2.Shenghua Xinshuo Railway Company Limited, Erdos 010300, China
Abstract:
Tree bilateral continuous power supply scheme can eliminate the electrical phase separation at the exit and section of traction substation, and enhance the power supply capacity and the utilization rate of the regenerative braking energy. The construction of tree bilateral continuous power supply scheme is introduced. For the tree bilateral continuous power supply scheme, the equivalent circuits of double cable direct power supply traction network in the cases of no-parallel, terminal-parallel and all-parallel, and unilateral direct power supply traction network in the case of terminal power supply arm are derived. Taking each traction substation as a unit, the chain circuit model of the tree bilateral continuous power supply system is constructed, and the power flow iteration algorithm is given. The proposed tree bilateral continuous power supply scheme is applied to the transformation design of an actual heavy-haul railway. The traction network equivalent impedance and scheme design of the existing scheme and the proposed scheme are simulated, compared and analyzed. The simulative results show that, compared with the existing power supply scheme, the tree bilateral continuous power supply scheme can reduce the traction network impedance parameters, improve the power supply capacity, increase the utilization rate of regenerative braking energy to 100%,and save annual electricity cost by about 4.605 8 million yuan through using the regenerative braking energy.
Key words:  electrified railway  tree bilateral continuous power supply  equivalent impedance  chain circuit model  regenerative braking energy

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