COPSE - A NEW HIGH PERFORMANCE CONTROLLER FOR DRYING AND OIL FILLING OF DISTRIBUTION POWER TRANSFORMERS

• Type: Article in International Conference Proceedings Book
• Date: 1994

Authors

QUINTAS, AR (Author) Other; CARVALHO, AS (Author) FEUP; ARAUJO, AS (Author) FEUP; MARTINS, AP (Author) FEUP; OLIVIERA, JC (Author) Other

Conference proceedings International

Title: FIFTH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND VARIABLE-SPEED DRIVES

Pages: 425-429

5th International Conference on Power Electronics and Variable-Speed Drives (PEVD94)

LONDON, ENGLAND, OCT 26-28, 1994

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-001-KQB

Resumo (PT): The drying process of distribution transformers in manufacturing process is traditionally made by indirect heating of the windings of the transformer within an oven. This drying method causes low efficiency, high drying time, and associated lower quality for voltage isolation than the new method implemented by the authors and presented in this paper. The heating process has become a direct heating process, supplying the transformer in manufacturing with a low frequency inverter and losses nominal power. The direct heating method requires a framework involving a control system for the heating current and winding temperature, handling highly nonlinear regimens in the output range of high temperature. Static operation points of temperature cause a drop down to 1% of the nominal power. The mean windings temperature is measured and controlled during all the process. This paper shows the design, implementation and results with a high performance controller for this process.

Abstract (EN): The drying process of distribution transformers in manufacturing process is traditionally made by indirect heating of the windings of the transformer within an oven. This drying method causes low efficiency, high drying time, and associated lower quality for voltage isolation than the new method implemented by the authors and presented in this paper. The heating process has become a direct heating process, supplying the transformer in manufacturing with a low frequency inverter and losses nominal power. The direct heating method requires a framework involving a control system for the heating current and winding temperature, handling highly non-linear regimens in the output range of high temperature. Static operation points of temperature cause a drop of transformer input power down to 1% of the nominal power. The mean windings temperature is measured and controlled during all the process. This paper shows the design, implementation and results with a high performance controller for this process.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5