{"id":8415,"date":"2014-03-09T16:20:15","date_gmt":"2014-03-09T19:20:15","guid":{"rendered":"http:\/\/treetech.com.br\/articles\/others\/braskem-cubatao-unit-performs-complete-maintenance-in-its-plant-and-increases-the-reliability-of-its-electrical-system"},"modified":"2017-07-31T20:08:07","modified_gmt":"2017-07-31T23:08:07","slug":"braskem-cubatao-unit-performs-complete-maintenance-in-its-plant-and-increases-the-reliability-of-its-electrical-system","status":"publish","type":"post","link":"https:\/\/treetech.com.br\/en\/braskem-cubatao-unit-performs-complete-maintenance-in-its-plant-and-increases-the-reliability-of-its-electrical-system\/","title":{"rendered":"Braskem Cubat\u00e3o unit performs complete maintenance in its plant and increases the reliability of its electrical system"},"content":{"rendered":"
[vc_row][vc_column][vc_column_text]At every three years, the Braskem industrial plant of polyethylene stops its activities for general inspection and maintenance of its premises. Machines and structures are inspected, in addition to the conditions of the electrical system, which receive special attention with specific activities, especially in the electrical power substation.<\/p>\n

As the electrical power is a fundamental input for the factory production, it is necessary that all the substation assets are in perfect operation conditions. Thus, each detail is checked, including switchgears (circuit breakers and disconnecting switches), isolators (CTs and PTs), especially the power transformer.<\/p>\n

The Cubat\u00e3o plant\u2019s substation has a single transformer, 88 kV \/ 13.8 kV, 20 MVA, which should not present any inconsistency, as this may represent losses to the company. The unit produces Low-Density Polyethylene (LDPE) and its production reaches 140 tons\/year of the material.<\/p>\n

The action of the technical and maintenance team of the company has the aim of keeping the safety of collaborators, achieving higher performance from the assets, in addition to uninterrupted power supply to support the ongoing production growth.<\/p>\n

\"RGL_7643\"<\/p>\n

Modernization of the system at Braskem Cubat\u00e3o unit<\/h2>\n

In March 2011, during plant shutdown for maintenance processes, the Braskem Cubat\u00e3o unit, in partnership with Treetech Sistemas Digitais, performed the modernization of the thermal protection system of a transformer and implemented the on-line monitoring system for complete equipment management.<\/p>\n

By initiative of the Reliability Engineer, Mr. Jo\u00e3o Luiz G. Neto, interested in assuring power supply to the plant, a solution has been searched for in order to improve quality of the own system (by increasing the asset\u2019s operation reliability) and make the maintenance work more assertive and smart.<\/p>\n

The project included the utilization of a set of IEDs (intelligent sensors) for monitoring of the transformer\u2019s variables, with support of the Sigma expert software for real time diagnostics and forecasts. With these tools, the maintenance team achieves reliable information to assist the decision-making process.<\/p>\n

The designed system includes the complete monitoring of capacitive bushings, removal and replacement of old analog thermometers by digital temperature monitor, automatic voltage adjustment and monitoring of the overload switch, in addition to on-lines supervision of the gas (H2) and moisture dissolved in the insulating oil.<\/p>\n

\"\"
SS at the Braskem Polyethylene plant in Cubat\u00e3o<\/figcaption><\/figure>\n

 <\/p>\n

\"lg-sigma4net-azul\"These pieces of equipment are interconnected and send information (measurements) to a Data Center located in the substation\u2019s command room. This information will be remotely accessed by the Braskem team via asset monitoring and management software Sigma4net<\/a>\u2122 (available for the computers interconnected over the company\u2019s corporate network).<\/p>\n

\u201cWe are able to follow all the measurements taken in the main transformer of the computer, in addition to quickly viewing diagnostics and forecasts provided by the software. The system also assists us in the better maintenance of the machine, fast consultations of graphics and trends on their operation,\u201d states Eng. Jo\u00e3o Luiz Gon\u00e7alves Neto, responsible for the implementation and operation of the new system.<\/p><\/blockquote>\n

From now on, the entire maintenance team will be provided with the same information. Thus, they will be able to follow the transformer\u2019s performance, and then prepare efficient plans for its maintenance. By its turn, there was great interaction with the new system during installation, as pointed out by Jo\u00e3o, \u201cthe Treetech team has supported us with all the information required to leverage the maximum system efficiency. Our experience, combined with the support from Treetech, will place us at the forefront of predictive maintenance in power substations\u201d.
\n\"sensores\"<\/p>\n

\u201cAs this is a fundamental equipment for production continuity here at Braskem, it was very important the monitoring system installation, which evidences the concern and care with the equipment. The entire team is aware that the new tool will help both in maintenance actions and to determining new investments based on the operating conditions of this transformer,\u201d emphasizes Jos\u00e9 Moitinho, application engineer at Treetech.<\/p><\/blockquote>\n

Then, the benefits are not limited to providing corrective or preventive actions to keep the transformer operation. By using the monitoring system, the maintenance and operation teams can indicate to the finance and planning area when the replacement of purchase of new equipment will be required to meet the increasing demands of the plant.<\/p>\n

\"RGL_7668\"
\nBy using Sigma, the Braskem Cubat\u00e3o unit will be able to perform:<\/strong><\/p>\n