A lightning protection switching device and its method for measuring ground capacitance and line inductance

Abstract

The invention discloses a lightning protection state-transforming apparatus comprising a testing-end line and a state-transforming-end line which are respectively connected with the two ends of a testing power transmission line. The testing-end line comprises a first current line, a first voltage line, a first ground line, a discharging gap, a double-pole-double-throw switch, a first testing terminal, and a second testing terminal. The state-transforming-end line comprises a second current line, a second ground line, a single-pole double-throw switch, and a short circuit state transforming binding post. Further, the invention also discloses a method for measuring the capacitance to ground and the line inductance value of a power transmission line with the lightning protection state-transforming apparatus. Performing state-transforming operation with the double-pole-double-throw switch on the testing-end line and the single-pole double-throw switch on the state-transforming-end line, the lightning protection state-transforming apparatus may achieve various states of the line, such as ground connection, short circuit, and no connection. In addition, transformation of all states can be protected in a whole course by a grounding or lightning protection gap.

Description

Technical field [0001] The invention relates to the technical field of power system substation switching operations, in particular to a switch and switching device for lightning protection and switching line wiring that can be used in the process of parameter testing of DC single and double circuits and AC single and double circuit transmission lines, It has the functions of lightning protection and switching the transmission line between multiple states such as grounding, short-circuiting and dangling, as well as a method of measuring the ground capacitance and line inductance of the transmission line by using the switching device. Background technique [0002] At present, in the domestic transmission line parameter test process, the conversion and realization of multiple functions such as grounding, short-circuiting and floating are all realized by manually changing the wiring method on the ground or gantry. It is used to prevent lightning strikes from causing line parameter mea...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing shortcomings that equipment and personal safety cannot be guaranteed when the state is frequently switched during the line parameter test process, and the operation is time-consuming and laborious, one of the purposes of the present invention is to provide a line parameter test lightning protection switching device

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