Ground wire energy harvesting method for overhead transmission line

Abstract

The invention discloses a ground wire energy harvesting method for an overhead transmission line. The method comprises the steps that the parameter information of a target overhead transmission line is collected, and the energy harvesting parameter information is calculated; all possible ground wire energy harvesting alternatives of the target overhead transmission line are acquired; the equivalent circuits of the ground wire energy harvesting alternatives are derived; a formula for calculating the maximum power of the ground wire energy harvesting alternatives is derived; the magnitude of theenergy harvesting power of the ground wire energy harvesting alternatives is analyzed under different position relations between a ground wire and a wire; and the best ground wire energy harvesting scheme is selected as the final ground wire energy harvesting method. According to the invention, the ground wire energy harvesting scheme of the transmission line with double insulation ground wires is analyzed; the equivalent circuits of energy harvesting are derived; the energy harvesting power calculation formula is analyzed; the analysis method of the energy harvesting scheme by the spatial position relationship between the ground wire and the wire is proposed to guide the optimization of the ground wire energy harvesting scheme; the problem of selecting the energy harvesting scheme is solved; and the method has the advantages of simple principles, high operability, high reliability, scientific rationality, and easy implementation.

Description

technical field [0001] The invention belongs to the field of electrical automation, and in particular relates to a ground wire energy harvesting method for an overhead power transmission line. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. Therefore, ensuring its own stable and reliable operation has become one of the most important tasks of the power system. [0003] As the society relies more and more on electric energy, the requirements for the safe and stable operation of the power grid are getting higher and higher, and a large number of on-line monitoring devices are put into operation on the transmission line. Due to the lack of continuous and stable low-voltage power supply, on-line monitoring devices for transmission lines gen...

AI Technical Summary

Problems solved by technology

However, at present, ground wire energy harvesting can only obtain a very small power. How to obtain enough power from the ground wire to meet the power demand of the online monitoring device is a key problem that has not yet been solved by the ground wire energy harvesting technology.

[0004] At the same time, for overhead transmission lines, there are often several ground wire energy harvesting schemes. In practical applications, which energy harvesting scheme can obtain greater power is lack of theoretical method guidance.

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