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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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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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</abstract><oa>free_for_read</oa></addata></record> |
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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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