Online monitoring device for inter-turn short-circuit fault of dry-type air-core power reactor and monitoring method thereof

Abstract

The invention discloses an online monitoring device for an inter-turn short-circuit fault of a dry-type air-core power reactor and a monitoring method thereof, and relates to an online monitoring device for an inter-turn short-circuit fault of a reactor and a monitoring method thereof. The invention provides an online monitoring device and a monitoring method thereof that can accurately measure, have high sensitivity, and have a small workload even for small turn number faults. In the invention, collected data are transmitted to an upper computer for storage, and an initial loss factor of a monitored reactor system is calculated; an online monitoring system performs real-time sampling on signals of the reactor system; a current loss factor is divided by the initial loss factor, and if thequotient is less than a preset threshold, the current loss factor is repeatedly calculated; if the quotient is greater than the preset threshold, the current reactor has an inter-turn short-circuit fault, and the upper computer stores and displays the current data. The online monitoring device and the monitoring method thereof in the invention are mainly used for online monitoring of the inter-turn short-circuit fault of the dry-type air-core power reactor.

Description

technical field [0001] The invention specifically relates to an on-line monitoring device and a monitoring method for an inter-turn short circuit fault of a reactor. Background technique [0002] With the increase of power transmission distance and capacity, more and more power reactors are installed in the power system. The shunt power reactor is installed at the head end of the transmission line. When the transmission line is in the no-load or light-load state, the shunt power reactor is put into the grid to provide inductive reactive power to the transmission line to improve the voltage rise at the end of the transmission line. ;The series power reactor is installed at the end of the transmission line after being connected in series with the capacitor. When the capacitive reactive power at the end of the line is insufficient, the capacitor bank is put into the grid to provide capacitive reactive power to the system, so as to improve the power transmission efficiency and t...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the defects that the existing dry-type air-core power reactor on-line monitoring method at the substation site cannot accurately measure insulation faults between turns with a small number of turns, has poor sensitivity and poor reliability, and provides a reactor package that is difficult to find. On-line monitoring device with high sensitivity and high reliability and monitoring method thereof, which can still accurately measure insulation faults between turns with few turns occurring inside the seal

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