基于高海拔地区大型光伏电厂GPS控制网投影变形问题的应用研究

The Research of GPS Control Network Projection Deformation of Large-scale Photovoltaic Power Plants in High Altitude Localities

在高海拔地区大型光伏电厂的建设过程中,高精度的GPS控制网是工程质量的重要保障。高海拔地区,GPS控制网存在投影变形的问题,当长度变形大于2.5 cm/km时,如何通过选择合理的投影面和投影带建立坐标系,从而控制投影变形是问题的关键。本文从理论上分析了长度变形的影响规律,提出了合理的解决方法并通过工程案例验证了该方法在实际工程中应用的可行性。

In the course of construction of large-scale PV power plants in high altitude areas,high-precision GPS control network is an important guarantee for quality of the project.In High altitude localities,there is a problem of GPS control network projection distortion.When the length of the deformation is more than 2.5cm/km,it is the key point that how to choose the reasonable projection surface and the projector to establish a coordinate system for controlling the projection distortion.The principle of affecting the length of deformation has been theoretically analyzed in this paper.It also has proposed a reasonable way to solve it and the way is tested to be feasibility in practical engineering applications by project cases.