Determination method and device of nominal voltage of lightning arrester along half-wavelength power transmission circuit

Abstract

The invention provides a determination method and device of the nominal voltage of a lightning arrester along a half-wavelength power transmission circuit. The method comprises steps of firstly, determining basic information of the lightning arrester along the half-wavelength power transmission circuit; then, determining the nominal voltage and the maximum absorption energy tolerance level of thelightning arrester along the half-wavelength power transmission circuit; and finally, judging whether the configuration requirements of the lightning arrester along the half-wavelength power transmission circuit are met so as to obtain the final nominal voltage of the lightning arrester along the half-wavelength power transmission circuit. According to the invention, the overvoltage protection level, the operation impact residual voltage, the temporary overvoltage tolerance performance and the maximum absorption energy tolerance level of the lightning arrester along the half-wavelength power transmission circuit are determined; basis is provided for the model selection of the lightning arrester along the half-wavelength power transmission circuit; and a problem of the failure to coordinateand control the power fluctuation overvoltage of the half-wavelength power transmission circuit, the restraining of the operation overvoltage and the tolerance ability of the lightning arrestor is solved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and device for determining the rated voltage of lightning arresters along half-wavelength transmission lines. Background technique [0002] Half-wave length AC transmission (half-wave length AC transmission, HWACT) refers to the ultra-long-distance three-phase AC transmission technology whose electrical distance of power transmission is close to a power frequency half-wavelength, that is, about 3000km (50Hz) or about 2600km (60Hz). Reactive power self-balancing, no need to install reactive power compensation equipment, no need to set up intermediate switch stations. HWACT has strong power transmission capacity, good economy and reliability, and can realize long-distance synchronous networking. With the advancement of the Global Energy Internet, HWACT, as a solution suitable for large-scale intercontinental power transmission, has received extensive attention. [...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of the power fluctuation overvoltage and operation overvoltage suppression of the half-wavelength transmission line in the prior art and the inability to coordinate control with the withstand capacity of the arrester and the lack of measures to determine the rated voltage of the arrester, the present invention provides a half-wavelength transmission line along the line The method and device for determining the rated voltage of the arrester first determine the basic information of the arrester along the half-wavelength transmission line; then determine the rated voltage of the arrester along the half-wavelength transmission line according to the basic information of the arrester along the half-wavelength transmission line The rated voltage of the arrester determines the maximum absorbed energy tolerance level of the arrester along the half-wavelength transmission line; finally judge the operating overvoltage, power fluctuation overvoltage, power fluctuation overvoltage duration of the half-wavelength transmission line and the absorbed energy of the arrester along the half-wavelength transmission line Whether the level meets the configuration requirements of the arrester along the half-wavelength transmission line at the same time. If the requirements are met, the rated voltage of the arrester along the half-wavelength transmission line is the final rated voltage of the arrester along the half-wavelength transmission line; Correct the rated voltage of the arrester, and finally get the final rated voltage of the arrester along the half-wavelength transmission line

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