Combining Droop Curve Concepts with Control Systems for Wind Turbine Active Power Control: Preprint

Conference · Fri Jun 01 04:00:00 EDT 2012

DOI:https://doi.org/10.1109/PEMWA.2012.6316403· OSTI ID:1046315

Buckspan, Andrew; Aho, Jacob; Pao, Lucy; Fleming, Paul A.; Jeong, Yunho

Wind energy is becoming a larger portion of the global energy portfolio and wind penetration has increased dramatically in certain regions of the world. This increasing wind penetration has driven the need for wind turbines to provide active power control (APC) services to the local utility grid, as wind turbines do not intrinsically provide frequency regulation services that are common withtraditional generators. It is common for large scale wind turbines to be decoupled from the utility grid via power electronics, which allows the turbine to synthesize APC commands via control of the generator torque and blade pitch commands. Consequently, the APC services provided by a wind turbine can be more flexible than those provided by conventional generators. This paper focuses on thedevelopment and implementation of both static and dynamic droop curves to measure grid frequency and output delta power reference signals to a novel power set point tracking control system. The combined droop curve and power tracking controller is simulated and comparisons are made between simulations using various droop curve parameters and stochastic wind conditions. The tradeoffs involvedwith aggressive response to frequency events are analyzed. At the turbine level, simulations are performed to analyze induced structural loads. At the grid level, simulations test a wind plant's response to a dip in grid frequency.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy Wind and Water Power Program
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 1046315
• Report Number(s): NREL/CP-5000-55211
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
AGC
CONTROL
CONTROL SYSTEMS
DIAGRAMS
DYNAMICS
ENERGY
GRIDS
IMPLEMENTATION
POWER
PRODUCTION
WIND POWER
WIND TURBINES
active power controls
droop curve
inertial response
primary response
wind turbine