摘要
地线取能是电力系统输电网络中各类传感监测设备的一种供能方式。为此,文章对典型架空地线的取电原理进行了分析,建立了等效参数模型,对取电端口的等效电压、等效阻抗进行了数学推导。选择一条220 kV线路利用ATP-EMTP软件进行了仿真,研究了取能负载对地线电流分布的影响,分析了包括导线电流、接地电阻、档距范围、取能负载等因素对取电参数的影响规律。结果显示:受感应电势和地线自阻抗的限制,地线电流不超过10 A;取电电压随着取能阻抗的增大呈现增大趋势,最终稳定在27 V左右,当取能负载为2.5Ω时,获得最大取能功率为175.03 W。这些结果为后续取能器的设计提供了数据基础。
Taking energy from the ground wire is a way of supplying energy for all kinds of sensing and monitoring equipment in the power system transmission network.In this paper,firstly,the principle of taking electricity of a typical overhead ground wire was examined.Next,its equivalent parameter model was established.Finally,the equivalent voltage and equivalent impedance of the electricity taking port were mathematically derives.Simulation of a 220 kV line with ATP-EMTP software was carried out.The influence of the energy load on the distribution of ground wire current and the influence of factors including wire current,ground resistance,span range,energy load on the electricity parameters were analyzed.The results show that limited by the induced potential and ground wire self-impedance,the ground wire current did not exceed 10 A.The voltage showed an increasing trend with the increase of impedance,and finally stabilized at about 27 V.When the energy extraction load was 2.5Ω,the maximum energy extraction power obtained was 175.03 W.These results provide a data basis for the design of subsequent energy takers.
作者
黄欢
邓钰龙
马晓红
蒋兴良
吴建蓉
胡琴
杨旗
吕乾勇
杨柳青
HUANG Huan;DENG Yulong;MA Xiaohong;JIANG Xingliang;WU Jianrong;HU Qin;YANG Qi;LYU Qianyong;YANG Liuqing(Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,P.R.China;Electrical Engineering,Chongqing University,Chongqing 400044,P.R.China)
出处
《重庆大学学报》
CAS
CSCD
北大核心
2023年第5期40-49,共10页
Journal of Chongqing University
基金
南方电网有限责任公司防冰减灾重点实验室支撑项目(GZKJXM20190748)。
