摘要
铁路牵引网沿线周围环境和导线电流对导线电阻影响较大,为了使牵引网潮流计算结果更准确、更符合实际,将电热耦合理论引入牵引网潮流计算,对牵引供电系统和考虑电热耦合影响的潮流计算方法进行了分析。首先分析了架空输电导线的电热耦合理论;其次在牵引供电方式基础上,建立了牵引网潮流计算的通用等效电路模型;最后提出一种考虑电热耦合影响的动态潮流计算模型与算法。该算法在传统牛顿–拉夫逊潮流计算模型的基础上增加了关于输电导线温度的微分方程,每次迭代求解后根据导线温度修正导线电阻,并更新节点导纳矩阵元素。研究结果表明:导线电流和环境参数的变化对牵引网等效阻抗及潮流计算影响较大,所提出的潮流计算方法考虑了各环境参数及电流对输电导线的影响,为进一步开展考虑电热耦合影响复杂牵引网模型下的潮流计算研究奠定基础。
The surrounding environment and the conductor current along the railway traction network have a great impact on the wire resistance.In order to obtain the more accurate and more realistic power flow calculation of the traction network,by introducing the electro-thermal coupling theory into the traction network power flow calculation,the traction power supply system and the power flow calculation method with the impact of electro-thermal coupling were analyzed.Firstly,the electro-thermal coupling theory of the overhead transmission lines was analyzed.Secondly,based on the traction power supply mode,a general equivalent circuit model for the traction power flow calculation was established.Finally,a dynamic power flow calculation model and its algorithm considering the effect of electro-thermal coupling were proposed.The results show that the proposed power flow calculation method takes into account the influence of environmental parameters and the current on transmission lines.The results lay the foundation for the further study of power flow calculation under the complex traction network model considering the influence of electro-thermal coupling.
作者
孙立军
脱长军
田铭兴
徐金阳
潘存磊
SUN Lijun;TUO Changjun;TIAN Mingxing;XU Jinyang;PAN Cunlei(Key Laboratory of Opto-technology and Intelligent Control Ministry of Education(Lanzhou Jiaotong University),Lanzhou730070,Gansu Province,China;Rail Transit Electrical Automation Engineering Laboratory of Gansu Province(Lanzhou Jiaotong University),Lanzhou 730070,Gansu Province,China;School of Automation&Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2020年第7期2665-2672,共8页
Power System Technology
基金
国家自然科学基金项目(51367010)
甘肃省科技计划项目(17JR5RA083)
甘肃省重点研发计划项目(18YF1FA058)
兰州交通大学优秀科研团队项目(201701)
兰州交通大学青年科学基金项目(2017038)。
关键词
牵引供电
电热耦合
潮流计算
热平衡方程
牛顿–拉夫逊法
traction power supply
electro-thermal coupling
power flow calculation
heat balance equation
Newton-Raphson method
