PT (potential transformer) loop disconnection detection method for shutdown state generator rotating speed measuring device

The invention provides a PT loop disconnection detection method for a generator rotating speed measuring device in a shutdown state, and the method comprises the steps: adding a 20Hz low-frequency power supply to a generator in a shutdown state based on an existing injection type stator grounding pr...

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Hauptverfasser: WANG YUANHONG, ZHENG ZHISHEN, JIN WEI, LIU HONGBIN, DAI WENLONG, ZHANG XINTIAN, XIONG FEI, PI YUEYIN, QI DI, ZHANG SHUAI, LI YIGANG, LIU SENYANG, ZHANG HUIJUN, LU TAO, YANG HESHI
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creator WANG YUANHONG
ZHENG ZHISHEN
JIN WEI
LIU HONGBIN
DAI WENLONG
ZHANG XINTIAN
XIONG FEI
PI YUEYIN
QI DI
ZHANG SHUAI
LI YIGANG
LIU SENYANG
ZHANG HUIJUN
LU TAO
YANG HESHI
description The invention provides a PT loop disconnection detection method for a generator rotating speed measuring device in a shutdown state, and the method comprises the steps: adding a 20Hz low-frequency power supply to a generator in a shutdown state based on an existing injection type stator grounding protection device, and coupling the 20Hz low-frequency power supply to a generator end through a generator neutral point grounding transformer; a plurality of PT speed measurement loops and a plurality of fluted disc speed measurement loops in the generator rotating speed measurement device are controlled, and the frequency of inter-phase voltage between every two phases in the PT loops at the generator end is measured; and comparing the frequency of the inter-phase voltage between every two phases with a preset frequency difference threshold value, and determining a target phase with a broken line fault in a PT loop for the generator rotating speed measuring device according to a comparison result. According to the
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language chi ; eng
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subjects CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title PT (potential transformer) loop disconnection detection method for shutdown state generator rotating speed measuring device
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