GNSS 控制网在高海拔长距离输电线路工程中的应用分析  

Application Analysis of GNSS Control Network in High-altitude Long-distance Transmission Line Engineering

作　　者：马小虎 闫国云 张发岳 李宗洋 刘康鹏 MA Xiaohu;YAN Guoyun;ZHANG Fafeng;LI Zongyang;LIU Kangpeng

机构地区：[1]中国电建集团青海省电力设计院有限公司,青海西宁810008

出　　处：《青海电力》2024年第4期42-45,共4页Qinghai Electric Power

摘　　要：输电线路工程中为满足对高海拔长距离线路中控制点精度的要求,对全球卫星导航定位系统(Global Navigation Satellite System,GNSS)控制网进行了研究。在GNSS控制网中海拔与基线长度对平面精度的影响较小,可以满足规范要求,而高原山地区域高程拟合结果能否达到规范要求有待验证,因此通过平面拟合和曲面拟合两种方法对高程拟合结果进行验证分析。经过数据处理、分析及现场校正检查,曲面拟合精度优于平面拟合,且两种结果皆能满足规范要求。研究表明对于高海拔长距离的输电线路,应优先选择曲面拟合方法进行拟合,若起算点不足可采用平面拟合方法进行拟合,但拟合结果需经过检查方可作业。In order to meet the accuracy requirements of control points in high-altitude and long-distance transmission lines in transmission line projects,Global Navigation Satellite System(GNSS)control network has been studied.In the GNSS control network,the altitude and baseline length have little effect on the plan accuracy,which can meet the specification requirements.However,whether the elevation fitting results in plateau mountainous areas can meet the specification requirements needs to be verified.Therefore the elevation fitting results are verified and analyzed using two methods:planar fitting and surface fitting.After data processing,analysis,and on-site correction checks,the of surface fitting is better than that of planar fitting,and both results can meet the specification requirements.The research shows that for high-altitude and long-distance lines,surface fitting method should be优先chosen for fitting.If there are insufficient starting points,the planar fitting method can be used for fitting,but the results need to be checked before proceeding with the work.

关 键 词：GNSS控制网 数据处理 高程拟合 

分 类 号：TM772[电气工程—电力系统及自动化] P236[天文地球—摄影测量与遥感]