摘要
针对现行牵引变电所倒闸操作存在的供电中断、耗时长等缺陷,探讨了牵引变电所短时并网倒闸的可行性及技术条件。结合牵引供电系统的运行机理和拓扑结构,搭建了Simulink仿真模型,分析了系统并网运行过程中的电流特性。阐述了并网倒闸现场实施流程,并对比分析了现场测试结果与仿真结果,验证了并网倒闸方案的可实施性及仿真模型的精确性。在此基础上,建立了牵引变电所并网运行等效模型,分析了并网时系统电流的计算方法,并应用敏感度指标探明了其关键影响因素。分析结果表明,2路进线电源的电压幅值差是最关键因素,且当2路进线电源的电压偏差满足国家电压偏差标准时,短时并网产生的电流不会影响系统的安全运行。最后,归纳了并网倒闸的技术条件,为牵引变电所并网倒闸的工程应用提供理论和技术支撑。
Aiming at the drawbacks of the existing switching operation scheme,such as time-cost,power supply interruption,the feasibility and the technical conditions of short-time grid-connected switching operation technology for traction substation are studied.Based on the operating mechanism and topology of traction substation,a detailed simulation model is established with Simulink,and the current characteristics in gridconnected process are analyzed.Then,the detailed procedure for the field test of grid-connected switching is elaborated,and the comparison results between field test and simulation verify the feasibility of the pro⁃posed scheme and the accuracy of the established simulation model.Furthermore,the equivalent model of grid-connected operation for traction substation is built,the calculation method of grid-connected current is analyzed,and a sensitivity index is applied to identify the critical influencing factors.The analysis results show that the voltage amplitude deviation between the two utility power supplies is the most critical factor,and the current caused by grid-connected switching does not affect the normal operation of system when the voltage deviation meets the requirements of the national voltage deviation standard.Finally,the technical conditions for grid-connected switching are listed,which can provide theoretical and technical support for the engineering application of grid-connected switching for traction substation.
作者
孙文静
王科
胡海涛
陈劲草
何正友
SUN Wenjing;WANG Ke;HU Haitao;CHEN Jincao;HE Zhengyou(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;High-speed Rail Operation and Maintenance Technology Centre,Shanghai Railway Administration,Shanghai 200071,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2020年第6期184-190,共7页
Electric Power Automation Equipment
基金
上海铁路局科研开发计划项目(JS15-004)。
关键词
牵引变电所
短时并网倒闸
电流特性
现场试验
技术条件
traction substation
short-time grid-connected switching
current characteristics
field test
technical condition
