ABSTRACT
Condition monitoring is state of the art in many kinds of industrial processes, e.g. power station turbines, rotating machines, etc. It is expected that this technology will also become a standard in wind energy applications. During the last years the cooperation of german manufacturer SCHENCK VIBRO GmbH and ISET has lead to a condition monitoring system, which can be applied for several types of wind turbines by software-setup 1 .
This paper will introduce the functionality of measurement routines for condition monitoring. Resulting characteristic values (e.g. global vibration levels, selective vibration frequencies and harmonics, nacelle oscillations) are described. Monitoring can be done with absolute limit values based on learned “normal values” or with various limit values with regard to the load of the monitored turbine. (Fuzzy) rules for machine diagnosis can be implemented into VIBRO-IC’s object related programming language. For evaluation of the monitoring algorithms measured data from a field test phase with VIBRO-ICs installed at several wind turbines are presented as trend plots or complex diagrams (real part over imaginary part).
