284 citations · 604 across the 18 of their papers we have counts for
11 papers · 1 filter
Extension of the Langevin power curve analysis by separation per operational state
Christian Wiedemann, Henrik M. Bette, Matthias Wächter +3
In the last few years, the dynamical characterization of the power output of a wind turbine by means of a Langevin equation has been well established. For this approach, temporally…
Short term fluctuations of wind and solar power systems
M. Anvari, G. Lohmann, M. Wächter +5
Wind and solar power are known to be highly influenced by weather events and may ramp up or down abruptly. Such events in the power production influence not only the availability o…
The Langevin Approach: An R Package for Modeling Markov Processes
Philip Rinn, Pedro G. Lind, Matthias Wächter +1
We describe an R package developed by the research group Turbulence, Wind energy and Stochastics (TWiSt) at the Carl von Ossietzky University of Oldenburg, which extracts the (stoc…
Langevin power curve analysis for numerical WEC models with new insights on high frequency power performance
Tanja A. Mücke, Matthias Wächter, Patrick Milan +1
Based on the Langevin equation it has been proposed to obtain power curves for wind turbines from high frequency data of wind speed measurements u(t) and power output P (t). The tw…
Parameter-free resolution of the superposition of stochastic signals
Teresa Scholz, Frank Raischel, Vitor V. Lopes +4
This paper presents a direct method to obtain the deterministic and stochastic contribution of the sum of two independent sets of stochastic processes, one of which is composed by…
Stochastic modeling and performance monitoring of wind farm power production
Patrick Milan, Matthias Wächter, Joachim Peinke
We present a new stochastic approach to describe and remodel the conversion process of a wind farm at a sampling frequency of 1Hz. When conditioning on various wind direction secto…
Capturing rogue waves by multi-point statistics
Ali Hadjihosseini, Matthias Wächter, Norbert P. Hoffmann +1
As an example for complex systems with extreme events we investigate ocean wave states exhibiting rogue waves. We present a statistical method of data analysis based on multi-point…
Fatigue Loads Estimation Through a Simple Stochastic Model
Pedro G. Lind, Matthias Wächter, Joachim Peinke
We propose a procedure to estimate the fatigue loads on wind turbines, based in a recent framework used for reconstructing data series of stochastic properties measured at wind tur…
Reconstructing the intermittent dynamics of the torque in wind turbines
Pedro G. Lind, Matthias Wächter, Joachim Peinke
We apply a framework introduced in the late nineties to analyze load measurements in off-shore wind energy converters (WEC). The framework is borrowed from statistical physics and…
Stochastic method for in-situ damage analysis
Philip Rinn, Hendrik Heißelmann, Matthias Wächter +1
Based on the physics of stochastic processes we present a new approach for structural health monitoring. We show that the new method allows for an in-situ analysis of the elastic f…
Principal axes for stochastic dynamics
V. V. Vasconcelos, F. Raischel, M. Haase +4
We introduce a general procedure for directly ascertaining how many independent stochastic sources exist in a complex system modeled through a set of coupled Langevin equations of…