Test method for electric endurance of switching capacitor set beaker of extra-high voltage project

Abstract

The invention provides a test method for electric endurance of a switching capacitor set beaker of the extra-high voltage project. The method passes the Acceptance Test Procedure (ATP) simulation verification, test results meet the standard and all requirements of the extra-high voltage project for the switching capacitor set test, a synthetic loop and an inductance-capacitance (LC) oscillating loop are used for testing, the loading investment of a test station for test devices is reduced, and the device safety hazards caused by long-time and large-quantity electrical endurance tests can be reduced.

Description

technical field [0001] The invention belongs to the field of switchgear testing for extra-high voltage engineering, and in particular relates to a method for testing the electric life of a switching capacitor bank circuit breaker for extra-high voltage engineering. Background technique [0002] The transmission power of the UHV grid varies greatly, and the problem of reactive power and voltage control is very prominent. Switching the capacitor bank on the tertiary side of the main transformer is an important means to control the system voltage. The reactive power compensation capacitor bank of the UHV AC test demonstration project has high voltage and large capacity. The system calculation proposes that Jingmen and Jindongnan UHV substations require switching capacitor bank circuit breakers with a rated voltage of 145kV and a rated capacitor bank breaking current of 1600A. In addition, the UHV system capacitor bank circuit breaker is the main means of switching capacitor ban...

AI Technical Summary

Problems solved by technology

[0012] The recovery voltage of the switching capacitor bank circuit breaker is high during the process of breaking the capacitor bank current, and the duration is long, which is prone to heavy breakdown and overvoltage, which poses a serious threat to the reactive power compensation device and system insulation. Due to the action of the switching capacitor bank circuit breaker Relatively frequent, so a ve

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