A Method for Measuring and Calculating the Electric Field Intensity Near the High-Voltage Transmission Line on the Hillside

Abstract

The invention relates to a method for measuring and calculating electric field intensity nearby high voltage transmission lines on a hillside, and belongs to the field of electromagnetic field intensity measuring and calculating. Under the kth span, a standard coordinate system XYZ is established in a high voltage transmission line plane; under the kth span, a coordinate system X'Y'Z' is established in a high voltage transmission line plane; thus a high voltage transmission line catenary equation model is obtained, and a transformational matrix model between the coordinate system X'Y'Z' and the standard coordinate system XYZ is also obtained; through utilization of a Maxwell potential coefficient method, the charge Q=[q1, q2, q3]<T> of a unit length of three equivalent conductive wires under the Kth span is obtained; the electric field intensity of the high voltage transmission line at any point in standard coordinate system XYZ in the kth span is obtained (according to the symbols as described in the description); and electric field intensity of three continuous spans are superposed to obtain the electric field intensity of any point in the space of the high voltage transmission line in the kth span (according to the symbols as described in the description). Compared with methods in the prior art, the method in the invention gives consideration to sag factors of the high voltage transmission line, electric field intensity measuring and calculating of any point nearby the high voltage transmission line which is not in a same plane can be realized.

Description

technical field [0001] The invention relates to a method for measuring and calculating electric field intensity, in particular to a method for measuring and calculating electric field intensity near a high-voltage transmission line on a hillside. Background technique [0002] The development of electric power is an important guarantee for the modernization of human society. With the improvement of people's safety awareness, the issue of safe power transmission has gradually become the focus of people's attention. Therefore, it is of great significance to study the distribution of electric field near high-voltage transmission lines for the design of high-voltage transmission lines and for the safety of workers. [0003] In the existing calculation methods of electric field strength, factors such as sag and span of high-voltage transmission lines are mostly ignored, and the height from the ground at the lowest point of sag or the average height of the line is used as the condu...

AI Technical Summary

Problems solved by technology

However, the specific load of the high-voltage transmission line is relatively large, the cross-section is large and the erection is high, resulting in relatively large wind and ice loads, which are significantly affected by the weather. These characteristics determine that the sag of the high-voltage transmission line is relatively large, and the electric field intensity is measured using two-dimensional Simplifying the model will produce a large error

There are a few other patents or documents that consider the sag factor of high-voltage transmission lines, but only consider the electric field distribution near the high-voltage transmission lines built on the horizontal plane. For some high-voltage transmission lines built on complex terrain, such as hillsides, now There is no detailed description in the prior art; at the same time, the calculation of the electric field strength in the prior art only considers the situation that the high-voltage transmission line is in the same vertical plane, and there is an included angle for the vertical plane where each span of the high-voltage transmission line is located. The situation was not discussed

Images