绝缘子文章综述.ppt

Evaluation of 400 kV Silicone Insulators Aged under Natural Tropical Conditions
J. Ramirez
Simon Bolivar University, Baruta, Edo.
Contents
INTRODUCTION
SAMPLES UNDER EVALUATION
DIAGNOSIS TESTS
TESTS RESULTS AND DISCUSSION
CONCLUSIONS
INTRODUCTION
Some studies on transmission insulators degraded in service under coastal and/or tropical conditions are mainly focused on the late ageing period and on the hydrophobicity behavior differences.
Scarce studies have been carried out focusing the incipient ageing of SiR insulators under tropical environmental conditions.
SAMPLES UNDER EVALUATION
A. Characteristics of the insulators
SAMPLES UNDER EVALUATION
B. Aged Sample's Environmental Conditions
DIAGNOSIS TESTS
Degrading process under service conditions
Periodical evaluations are needed:
Visual inspection and electrical, mechanical or physicochemical test
Different properties must be monitored( in and offline)
To this study
Visual inspection
Electrical evaluations
Physicochemical Analysis
Mechanical Evaluation
-End –fitting
-Sheds and core
-Leakage current
-partial discharges
-Radio interference
-Electronic Microscopy
-Hydrophobicity
-Mechanical withstand
-Traction
Macro Level Evaluation
of the surface
Detailed Evaluation of the surface
Micro Level Evaluation
of the surface
End-fittings and core evaluation
Degrading process under service conditions
Periodical evaluations are needed:
Visual inspection and electrical, mechanical or physicochemical test
Different properties must be monitored( in and offline)
Degrading process under service conditions
Periodical evaluations are needed:
Visual inspection and electrical, mechanical or physicochemical test
To this study
Different properties must be monitored( in and offline)
Degrading process under service conditions
Periodical evaluations are needed:
Visual inspection and electrical, mechanical or physicochemical test
-End –fitting
-Sheds and core
To this study
Different properties must be