Assessment and Performance Evaluation of a Wind Turbine Power Output

Abstract

Estimation errors have constantly been a technology bother for wind power management, often time with deviations of actual power curve (APC) from the turbine power curve (TPC). Power output dispersion for an operational 800 kW turbine was analyzed using three averaging tine steps of 1-min, 5-min, and 15-min. The error between the APC and TPC in kWh was about 25% on average, irrespective of the time of the day, although higher magnitudes of error were observed during low wind speeds and poor wind conditions. The 15-min averaged time series proved more suitable for grid management and energy load scheduling, but the error margin was still a major concern. An effective power curve (EPC) based on the polynomial parametric wind turbine power curve modeling technique was calibrated using turbine and site-specific performance data. The EPC reduced estimation error to about 3% in the aforementioned time series during very good wind conditions. By integrating statistical wind speed forecasting methods and site-specific EPCs, wind power forecasting and management can be significantly improved without compromising grid stability.

Wind-Energy-Powered Electric Vehicle Charging Stations: Resource Availability Data Analysis

“…However, the actual wind power output is usually more than the theoretically calculated power, as in Equation 2, which may produce an estimation error of about 3%. This is because the gained momentum by the rotating turbine blades sustains the continual rotation when a sudden decrease in wind speed occurs with no major change in the angular wind direction [32]. The output power P(t) quantifies the variable turbine power at each time point t (in minutes).…”

Virtual Synchronous Control Based on Control Winding Orientation for Brushless Doubly Fed Induction Generator (BDFIG) Wind Turbines Under Symmetrical Grid Faults

“…Therefore, the high penetration level of wind turbines and power electronics interfaces will decrease the total system inertia and lower the voltage/frequency stabilization compared to conventional synchronous generating units. The large voltage/frequency deviation might result in separation of the power system [1][2][3][4].…”

“…In order to improve the operation characteristics of BDFIG in the case of symmetrical grid faults, Equation (11) and (12) are utilized to calculate the compensation term i * cz, and the total reference current i * cd = i * cw + i * cz is finally obtained for the inner CW current controller. Additionally, according to the first equation in (4), E 0 can be obtained as:…”

A Comparative Computational Fluid Dynamic Study on the Effects of Terrain Type on Hub-Height Wind Aerodynamic Properties

“…Wind turbine power output has been studied under themes such as performance characterization [21][22][23], assessment and management [24], estimation/forecast errors [25], and power curves [26][27][28].…”

“…One common conclusion is the presence of deviations of the actual farm or turbine output from that of the supplied power curve using the words errors, dispersion belly and/or variations interchangeably. Abolude & Zhou [24] observed deviations of actual output from the turbine power curve for an 800 kW WT, while Villaneuva & Feijoo [29] argue for a "true power curve" to minimize estimation errors observed from WT real time performance data. In another related study, Whale et al [30] noted deviations of the actual power from manufacturer WTPC for small wind turbines at high wind speeds, and Cooney et al [21] reported similar differences during a performance characterization study for an urban-sited wind turbine.…”