{"id":17034,"date":"2026-11-06T08:43:54","date_gmt":"2026-11-06T11:43:54","guid":{"rendered":"https:\/\/treetech.com.br\/?p=17034"},"modified":"2026-11-06T11:05:56","modified_gmt":"2026-11-06T14:05:56","slug":"strategies-for-preventing-incipient-failures-in-hv-bushings-in-renewable-energy-conversion","status":"publish","type":"post","link":"https:\/\/treetech.com.br\/en\/strategies-for-preventing-incipient-failures-in-hv-bushings-in-renewable-energy-conversion\/","title":{"rendered":"Strategies for Preventing Incipient Failures in HV Bushings in Renewable Energy Conversion"},"content":{"rendered":"
[vc_row full_width=”stretch_row” content_placement=”middle” gap=”0px” css_animation=”none” wpex_bg_color=”palette-12771″][vc_column width=”2\/3″][vc_column_text css_animation=”none” css=”.vc_custom_1793966529381{padding-top: 22px !important;padding-bottom: 22px !important;}” color=”#ffffff”]ABSTRACT<\/strong><\/p>\n

One of the greatest challenges in energy generation is ensuring that assets are always available, exhibit minimal failure rates, and maintain maximum operational output. Power transformers are among the most critical assets in wind farms, as they are particularly vulnerable due to being the connection points to Brazil’s National Interconnected System (SIN<\/em>).[\/vc_column_text][\/vc_column][vc_column width=”1\/3″]

Download Article<\/svg><\/span><\/span><\/span><\/a><\/div><\/div> [\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text css_animation=”none” css=”.vc_custom_1793966628852{padding-top: 22px !important;padding-bottom: 33px !important;}”]It is widely known that the performance of power transformers used with renewable energy sources\u2014due to the effects of harmonics, system transients, and power inverters\u2014differs from that of transformers used in traditional generation, transmission, and distribution grids. Although these transformers have evolved over hundreds of years to become reliable in conventional applications, ensuring they serve reliably for forty years in renewable energy applications presents a completely different challenge.<\/p>\n

Capacitive bushings, components of these transformers, demand close attention due to their failure rates\u2014they account for 15.6% of failures, according to 2015 statistics from Cigr\u00e9 WG A2.37.<\/p>\n

To mitigate risks associated with failures in power transformer bushings, the CPFL approach has involved the use of real-time monitoring tools and inferences. These tools are designed to preempt incipient failures by monitoring operational behavior. Through continuous online measurement, data is relayed to our Asset Monitoring Center (CMA<\/em>). Here, any emerging risk of potential failure is identified using the potential failure curve (PF<\/em>), which, if detected, can pose a significant threat\u2014potentially leading to total or catastrophic loss.<\/p>\n

This scenario necessitates a Business Impact Analysis (BIA) under ISO 31000 Risk Management and ISO55000 Asset Management standards, as well as increasing both operational costs and security risks.<\/p>\n

The monitoring tool installed on high-voltage bushings senses and records several parameters including tangent delta, leakage current, and capacitance. This is part of an integrated asset management system that employs predictive techniques to preemptively address incipient failures. The data collected provides real-time insights into the behavior of capacitive bushings, enabling timely interventions through a Predictive Maintenance Plan. This not only prevents total asset loss but also optimizes maintenance strategies.<\/p>\n

Moreover, the tool includes prognostic capabilities that predict future issues based on the progression of measurements over time. This early detection of problems in their incipient phase allows our asset management system to tailor interventions to the specific needs of wind farms in Brazil. The benefits of online monitoring include reduced risk exposure, enhanced operational health data, lower unexpected costs, and improved asset availability.<\/p>\n

Each aspect of online monitoring is underscored by real-world cases that demonstrate its impact on the management processes of power transformers and wind farms. This technology significantly boosts productivity indicators and enhances the overall operational reliability of the company.<\/p>\n

From these implementations, we have developed criteria for mapping operational risk management, which has resulted in cost savings, risk mitigation, and a more predictive approach to asset lifecycle management.<\/p>\n

\n

AUTHORS<\/strong><\/p>\n

Main Author: Afonso Cesar Tavares – afonso.tavares@cpfl.com.br<\/a>
\nDaniel Carrijo
\nClaudio Justi
\nLucas Pavan Fritoli<\/p>\n

CPFL Renov\u00e1veis
\nUniversidade de S\u00e3o Paulo – USP
\nCPFL Renov\u00e1veis
\nTreetech Tecnologia[\/vc_column_text][\/vc_column][\/vc_row][vc_row full_width=”stretch_row” content_placement=”middle” gap=”0px” css_animation=”none” wpex_bg_color=”palette-12771″][vc_column]

Download Article<\/svg><\/span><\/span><\/span><\/a><\/div> [\/vc_column][\/vc_row]\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row full_width=”stretch_row” content_placement=”middle” gap=”0px” css_animation=”none” wpex_bg_color=”palette-12771″][vc_column width=”2\/3″][vc_column_text css_animation=”none” css=”.vc_custom_1793966529381{padding-top: 22px !important;padding-bottom: 22px !important;}” color=”#ffffff”]ABSTRACT One of the greatest challenges in energy generation is ensuring that assets are always available, exhibit minimal failure rates, and maintain maximum operational output. Power transformers are among the most critical assets in wind farms, as they are particularly vulnerable due…<\/p>\n","protected":false},"author":1,"featured_media":12308,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[135],"tags":[345,344,346,349,348,347,350],"class_list":["post-17034","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-generation","tag-asset-management","tag-high-voltage-capacitive-bushings","tag-operational-risk","tag-power-transformers","tag-predictive-maintenance","tag-real-time-monitoring","tag-wind-farms","entry","has-media"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t