Fonte: ANEEL

CLIC Energua publishes the ninth of the 30 projects selected for Revista de P&D 4^th Edition, released on 08/17 during the Sixth Congress of Technological Innovation in Electric Power (CITENEL) and the Second Seminar on Energy Efficiency in the Electricity Sector (SEENEL), held in Fortaleza (CE).The goal is to provide society with the results achieved with the R&D projects. The publication on site accompanies the order of insertion in the magazine.

The sixteenth article, by Companhia Energética de Pernambuco (CELPE) with the implementation of the Research and Development Center (CPqD), Federal University of Campina Grande (UFCG) and the Federal University of Pernambuco (UFPE), describes the use of a series to study the life of the line insulators by non-invasive methods. Through (coast and interior) field testing and in the laboratory, using ultrasound, x-ray imager and high voltage electrical testing, we found peculiarities and characteristic weak points to detect degraded insulators. According to the researchers, the project contributed to the development of an effective means of evaluating the condition of insulators, as well as to detect the performance requirements necessary for the proper functioning of the equipment. 

The full text of all articles can be found here (Revista de P&D 4^th Edition). (BT/DB) 
Read what has been published so far. 

ANEEL launches the 4th edition of Revista de R&D on the first day of the CITENEL  

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R&D Magazine: Light studies measures to energy supply in UPP 

R&D Magazine: Digitalized model reveals thermal limits of transformer

R&D Magazine: Light controls the underground defects through sound  

R&D Magazine: Ampla creates system for remote cut in high voltage

R&D Magazine: Measurement of gases helps transformer maintenance

Ultrasound, X-ray imager and thermal imaging assist in evaluation of polymeric insulators 

Aiming to study the degradation of polymeric insulators line by noninvasive methods such as X-rays, thermal imaging and ultrasound, we have developed the technical work of Companhia Energética de Pernambuco (CELPE), of the Research and Development Center (CPqD), of the Federal University of Campina Grande (UFCG) and of the Federal University of Pernambuco (UFPE). The degradation of these devices in various environments was compared: coastal region, hinterland and in the laboratory. The research allowed to list functional and performance requirements for insulators, preparing specifications, determining routine inspection, replacement and new deployments. To develop the study, researchers took samples of insulators and forwarded to the laboratory where they were subjected to an accelerated aging process. Later, there were high voltage electrical tests to evaluate changes in mechanical properties and physical-chemical properties. Leakage current measurements also became effective in the field with various (coastal and interior) climatic conditions and in the laboratory. Thereafter, inspections were performed with ultraviolet and infrared cameras for observation during inspections. The results obtained showed the dependence of the intensities of the currents of insulators with respect to levels of salinity and humidity in each environment. Inspections and ultraviolet imager showed hot spots along the surface discharges, which indicated a correlation with measurements of leakage current. According to the researchers, this may signal that these methods could also be used to detect degraded insulators. The researchers concluded that the project contributed to the studies on the development of an effective means of evaluating the condition of insulators and review of performance requirements for equipment specifications.

Specifications 
Company: Companhia Energética de Pernambuco (CELPE) 
Title: Estudo para Avaliação da Degradação de Vida Útil de Isoladores Poliméricos através de Sensor por Corren­te de Fuga, Técnicas não-Invasivas e Experimentação Laboratorial 
Cycles: 2005/2006 and 2006/2007 
Investment: BRL 822,718.03 
Implementation: Research and Development Center (CPqD), Federal University of Campina Grande (UFCG) and Federal University of Pernambuco (UFPE)