摘要
贯通同相供电系统可以取消全线电分相,实现牵引网不间断供电,对贯通同相供电系统进行建模和运行特性分析能够为系统的设计和优化提供理论依据。构建同相牵引变电所模型;建立能够灵活模拟不同拓扑结构和不同运行状态的贯通同相供电系统的链式电路模型;针对模型高效求解和导线载流量校验需求,提出一种改进的导体电流间接求解方法;基于构建的模型对贯通同相供电系统在空载和负载工况下的运行特性进行分析。研究结果表明,三相电压不平衡度的计算值与理论值相等,验证了模型的正确性;与既有导体电流计算方法相比,改进的导体电流间接求解方法的计算精度无差异,计算时间缩短为原来的1/3;潮流计算能够充分反映贯通同相供电系统的穿越功率以及牵引网电压、电流等特性。
The continuous co-phase power supply system can cancel the phase separation of the whole line and realize the uninterrupted power supply of the traction network.The modeling and operation characteris⁃tic analysis of continuous co-phase power supply system can provide a theoretical basis for the design and optimization of the system.The model of co-phase traction substation is constructed.The chain circuit model of continuous co-phase power supply system which can flexibly simulate different topology structures and different operation states is established.Then,an improved indirect solution method of conductor current is proposed for efficient model solving and current carrying capacity calibration.Based on the constructed model,the operation characteristics of continuous co-phase power supply system under no-load and load con⁃ditions are analyzed.The results show that the calculated value of three-phase voltage unbalance factor is equal to the theoretical value,which verifies the correctness of the model.Compared with the existing con⁃ductor current calculation method,there is no difference in the calculation accuracy of the improved indi⁃rect solution method,and the calculation time is reduced to one third.The power flow calculation can fully reflect the crossing power of continuous co-phase power supply system and the voltage and current charac⁃teristics of the traction network.
作者
次凯旋
解绍锋
王辉
隋延民
CI Kaixuan;XIE Shaofeng;WANG Hui;SUI Yanmin(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China;Chengdu Shanghua Electric Co.,Ltd.,Chengdu 610200,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi’an 710043,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2024年第10期201-207,共7页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(52277126)
四川省科技计划项目(2021YJ0028)。
关键词
贯通同相供电系统
链式电路模型
潮流计算
导体电流
运行特性
continuous co-phase power supply system
chain circuit model
power flow calculation
conductor current
operation characteristics
