Repositorio
Institucional

Villalobos, Rodrigo J.,

Moran, Luis A.

Huenupan, Fernando

Vallejos, Francisco

Moncada, Roberto

Pesce, Cristian G.

A New Current Transducer for On-Line Monitoring of Leakage Current on HV Insulator Strings

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

IEEE ACCESS

en

Leakage current measurement and its harmonics have been widely used for the pollution level estimation of HV insulator strings. However, the solutions available to applications into transmission lines and substations are few and it reduces the creepage distance (mm/kV), must be installed by de-energizing the electrical power system or do not allow the characteristic harmonics of the leakage current to be obtained. This paper presents the design, implementation, testing, and experimental validation of a transducer for measuring and online monitoring of leakage currents on high-voltage insulator strings. The transducer is composed of a clamp-type current transformer with a supermalloy material core. The leakage current is reconstructed from the transducer output voltage by applying the Fast Fourier Transform (FFT) and its own inverse transfer function, which allows it to obtain the leakage current with its characteristic harmonics and reduces the electromagnetic noise present in power systems. The output voltage of the transducer was acquired, processed, and transmitted using a dedicated device installed in the HV tower. The proposed transducer was first tested on an insulator inside an artificial fog chamber according to the IEC 60507 standard. The transducer was experimentally validated on an insulator string in a 220 kV substation. The results showed that the designed transducer measured the leakage current and its harmonics with an average error less than 1.76%. With these results the transducer can be used for the on-line monitoring of pollution levels of insulator strings without reduces the creepage distance.

artículo original

This work was supported in part by the Conicyt Fondef/Cuarto Concurso IDeA en Dos Etapas del Fondo de Fomento al Desarrollo Cientifico y Tecnologico, Fondef/Conicyt 2017, under Grant ID17I20421, and in part by the Direccion de Investigacion, Universidad de La Frontera.

10.1109/ACCESS.2022.3191349

PDF

Insulators

Transducers

Leakage currents

Current measurement

Pollution measurement

Transmission line measurements

Pollution

Current transducer

HV insulator strings

leakage current

on-line monitoring

pollution level estimation

CONTAMINATION LEVEL

FLASHOVER PROCESS

CURRENT INDEX

VOLTAGE

POLLUTION

PORCELAIN

Ciencias de la Computación

Sistemas de Información

Ingeniería Eléctrica y Electrónica

Telecomunicaciones

Aisladores

Transductores

Corrientes de fuga

Medición de corriente

Medición de contaminación

Medidas de líneas de transmisión

Contaminación

Transductor de corriente

Cadenas de aisladores de alta tensión

corriente de fuga

monitoreo en línea

estimación del nivel de contaminación

NIVEL DE CONTAMINACIÓN

PROCESO DE FLASHOVER

ÍNDICE DE CORRIENTE

TENSIÓN

CONTAMINACIÓN

PORCELANA

A New Current Transducer for On-Line Monitoring of Leakage Current on HV Insulator Strings

78818

78826

artículo original

version publicada

CC BY-NC-ND 4.0

CC BY-NC-ND 4.0

acceso abierto

acceso abierto

ANID-FONDEF ID17I20421

ANID FONDEF ID17I20421

WOS:000836204600001