This paper presents the analysis of an on-line fault detection method for proportional directional hydraulic valves applied on speed governors of hydroelectric power plants. This application area is very sensitive for unexpected maintenance or long duration stops since most of power plants are interconnected on an electrical power grid. A plant stop must be programmed previously and approved by a regulatory agency. Consequently, the implementation of a fault detection and monitoring system can reduce maintenance and operational costs as well as safety risks of equipment and operators. The developed method is based on monitoring both the valve supply current and spool position related to an input control signal. Therefore, it is applicable for so called servoproportional valves, it means, those including spool position measurement and with embedded electronics. Valve static and dynamic behaviour depends on spool friction, flow forces, solenoid force and valve closed loop controller. Such characteristics are influenced by the spool size, overlapping and manufacturing tolerances. In this paper, the effectiveness of the method to monitor and detected faults in valves with different sizes and constructive parameters is demonstrated experimentally using five proportional valves.
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9th FPNI Ph.D. Symposium on Fluid Power
October 26–28, 2016
Florianópolis, SC, Brazil
Conference Sponsors:
- Fluid Power Net International (FPNI)
- Federal University of Santa Catarina (UFSC), Brazil
ISBN:
978-0-7918-5047-3
PROCEEDINGS PAPER
Evaluation of an On-Line Fault Detection Method for Proportional Hydraulic Valves
Henrique Raduenz,
Henrique Raduenz
Federal University of Santa Catarina, Florianópolis, Brazil
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Fábio José Souza,
Fábio José Souza
REIVAX S/A Automation and Control, Florianópolis, Brazil
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Pedro P. C. Bastos,
Pedro P. C. Bastos
REIVAX S/A Automation and Control, Florianópolis, Brazil
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Desyel Ferronatto,
Desyel Ferronatto
REIVAX S/A Automation and Control, Florianópolis, Brazil
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Victor J. De Negri,
Victor J. De Negri
Federal University of Santa Catarina, Florianópolis, Brazil
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João Marcos Castro Soares
João Marcos Castro Soares
REIVAX S/A Automation and Control, Florianópolis, Brazil
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Henrique Raduenz
Federal University of Santa Catarina, Florianópolis, Brazil
Fábio José Souza
REIVAX S/A Automation and Control, Florianópolis, Brazil
Pedro P. C. Bastos
REIVAX S/A Automation and Control, Florianópolis, Brazil
Desyel Ferronatto
REIVAX S/A Automation and Control, Florianópolis, Brazil
Victor J. De Negri
Federal University of Santa Catarina, Florianópolis, Brazil
João Marcos Castro Soares
REIVAX S/A Automation and Control, Florianópolis, Brazil
Paper No:
FPNI2016-1569, V001T01A043; 8 pages
Published Online:
November 30, 2016
Citation
Raduenz, H, Souza, FJ, Bastos, PPC, Ferronatto, D, De Negri, VJ, & Soares, JMC. "Evaluation of an On-Line Fault Detection Method for Proportional Hydraulic Valves." Proceedings of the 9th FPNI Ph.D. Symposium on Fluid Power. 9th FPNI Ph.D. Symposium on Fluid Power. Florianópolis, SC, Brazil. October 26–28, 2016. V001T01A043. ASME. https://doi.org/10.1115/FPNI2016-1569
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