Method and device for determining parameters of high-speed grounding switches along half-wavelength transmission lines

Abstract

The invention provides a method and device for determining the parameters of a high-speed grounding switch along a half-wavelength transmission line. Parameters for the switch. The invention provides the action control process of the high-speed grounding switch arranged along the half-wavelength transmission line when a single-phase grounding fault occurs at different positions along the line, so that the high-speed grounding switch can operate reliably, and avoids the submerged power supply arc caused by the high-speed grounding switch due to misoperation The phenomenon that the arc cannot be reliably extinguished, and can effectively reduce the submerged current and recovery voltage during the single-phase reclosing process of the half-wavelength transmission line, ensuring the success rate of reclosing. The invention obtains different breaking working conditions of the high-speed grounding switch and the rated induced voltage and rated induced current of the high-speed grounding switch during the breaking process, and provides a technical basis for the type selection of the high-speed grounding switch.

Description

Method and device for determining parameters of high-speed grounding switch along half-wavelength transmission line technical field The present invention relates to the technical field of power systems, in particular to a high-speed grounding switch along a half-wavelength transmission line Parameter determination method and apparatus. Background technique Half-wavelength AC transmission (half-wave length AC transmission, HWACT) refers to the electrical The distance is close to a power frequency half wavelength, that is, about 3000km (50Hz) or about 2600km (60Hz) ultra-long-distance three-phase AC transmission Technology, the whole line of reactive power self-balancing, no need to install reactive power compensation equipment, no need to set up an intermediate switch station. Transmission Capability of HWACT Strong, economical and reliable, it can realize long-distance synchronous networking. With the advancement of the Global Energy Internet, HWACT will It has r...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned key points such as the misoperation of the high-speed grounding switch along the half-wavelength transmission line in the above-mentioned prior art, the submerged arc cannot be reliably extinguished and the lack of rated induced voltage and rated induced current during the breaking process of the high-speed grounding switch along the half-wavelength transmission line. Defects in the process of determining technical parameters, the present invention provides a method and device for determining the parameters of a high-speed grounding switch along a half-wavelength transmission line. Then according to the action sequence and action command of the high-speed earthing switch, the high-speed earthing switch required to act is activated, and finally the breaking condition is determined according to the action sequence of the high-speed earthing switch, and the rated induced voltage and The parameters of the high-speed grounding switch with rated induction current, through the action control of the high-speed grounding switch, the determination of the parameters of the high-speed grounding switch along the half-wavelength transmission line is realized

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