Diseño de un Sistema de Monitoreo de Vibraciones Mecánicas en Generadores Hidroeléctricos de Media Potencia

Translated title of the contribution: Design of a Monitoring System for Mechanical Vibrations in Medium Power Hydroelectric Generators

Carlos Andrés Maigua López, William Giovanny Quitiaquez Sarzosa, Angel Isaac Simbaña Gallardo, Rene Patricio Quitiaquez Sarsoza, Luis Fernando Toapanta Ramos, César Alejandro Isaza Roldan

Research output: Contribution to journalArticle

Abstract

The objective of the research was to elaborate a methodology aimed at monitoring and forecasting the actual condition of a medium power hydroelectric generator. The proposed procedure was based on the continuous monitoring of the energetic behavior of the vibration signals, using accelerometers with output proportional to the general speed vibration level. The variable considered is the RMS value of the vibration velocity referential to the amount of fatigue stress. Through virtual instrumentation, the signals were processed and converted into a numerical value, defining the upper and lower limits for each of the critical zones (A, B, C, D) according to the parameters described in the STN ISO 10816 standard. Measurements and historical records were made over 3 weeks, during this evaluation period the generator operated at 80% of its capacity, and a wave spectrum with constant trend within the same range of values ranging from 0.21 to 1.79 mm/s (for the axial axis) and 0.39 to 2.23 mm/s (for the radial axis) was visualized, it was concluded that these values do not exceed the RMS value of the range 0.71 to 2.80 mm/s. Defining that the real state of the rotating machine at present is within the criticality limits of zone A (new or reconditioned machine), due to the fact that two years ago the generation group was subjected to maintenance works, where several elements of the equipment were repaired, in which the change of impellers and the replacement by a turbine with more blades stands out, guaranteeing at least a normal operation in this zone during the following 6 years.
Translated title of the contributionDesign of a Monitoring System for Mechanical Vibrations in Medium Power Hydroelectric Generators
Original languageSpanish (Ecuador)
Pages (from-to)92-102
JournalRevista Técnica Energía
Volume17
Issue number17
DOIs
StatePublished - 30 Jul 2020

Keywords

  • Condition monitoring of rotating machines
  • Stn iso 10816 standard
  • Vibration acceleration measurements

CACES Knowledge Areas

  • 727A Industrial and process design

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