A new procedure for wind energy systems maintenance design

Abstract

The present study introduces a new procedure to analyze and design wind farms maintenance plans, based on analysis of variance, that can be directly implemented by the own operator. This methodology, based on a one-way analysis of variance study of weather variables and wind turbine working conditions, allows to define the exact operating range at which each of the most frequent errors in wind farms used to happen. Typically, most frequent errors, like freezing of anemometers, excessive orientation time errors, brake shoe excessive temperature, emergency stop, and asymmetric currents, appear under certain weather, temperature, and wind velocity conditions, in such a way that they can be modeled as a function of wind velocity and wind direction. In a similar way, other analyzed errors, such as starting problems and errors in current phase sequence, showed a tendency to appear under specific wind orientations.

The Influence of Climate Parameters on Maintenance of Wind Farms—A Galician Case Study

“…This research work aims to determine the existence of a relation between the climatic variables that usually occur in a wind farm and the occurrence of the failure at the time each of them happens. This study, despite the fact it was initially analyzed in previous studies [ 6 , 11 , 25 ], is a more detailed analysis of the relationship between a nonfailure and a failure has been attempted according to each of the climatic variables present at the time of the failure, as shown in Table 5 . This table shows the errors that, compared to the nonfailure, show for each of the climate variables a significance level close to 0.000, that is, they are different from the condition’s climate failure.…”

Analysis of systems and methods of emergency braking of wind turbines

“…Continuous loads of resonant vibrations will lead to the destruction of the structure. As a rule, the vibration effect leads to an increased decrease in the durability of the unit, the destruction of bearings, cracking of the foundation, radial runout occurs -these negative effects lead to the destruction of the wind turbine and create a danger during its operation [7,8].…”