A high-speed grounding switch configuration method and system along a half-wavelength transmission line

Abstract

The invention discloses a method for configuring a high-speed grounding switch along a half-wavelength transmission line, which includes: according to the generation mechanism of submerged power supply arc caused by power frequency resonance of the half-wavelength transmission line, respectively obtaining when a single-phase grounding fault occurs at different positions along the half-wavelength transmission line , the distribution characteristics of the natural frequency of the system in the submerged supply current stage and the recovery voltage stage and the corresponding amplitude change with the fault location; according to the power frequency resonance condition, the half-wavelength transmission line is divided into two sections, and at the middle point and the two sections A group of high-speed grounding switches HSGS are respectively configured at the endpoints; each segment of the half-wavelength transmission line is decoupled into N segments according to the preset segmentation decoupling rules, so that each fault of the half-wavelength transmission line The suppressing effect of the latent power supply current and recovery voltage at the location is the best; according to the results of the average segmental decoupling, the final configuration scheme is determined as re- Configure a group of HSGS respectively.

Description

technical field [0001] The present invention relates to the technical field of power systems, and more specifically, to a method and system for configuring a high-speed grounding switch along a half-wavelength transmission line. 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. It has strong power transmission capacity, good economy and reliability, and can realize long-distance synchronous networking. With the advancement of the Global Energy Internet, half-wave power transmission has attracted widespread attention as a solution for large-scale intercontinental power ...

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a method and system for configuring high-speed grounding switches along half-wavelength transmission lines to solve how to install multiple sets of high-speed grounding switches along half-wavelength transmission lines to effectively solve the problem of potential current supply of half-wavelength transmission lines and ensure single-phase automatic The reliability of reclosing

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