JWG A1/C4.52 Wind generators and frequency-active power control of power systems

As wind generation is becoming a significant component of the generation portfolio in many power systems, provision of frequency-active power control is being required of this technology in many regions. This joint working group between A1 and C4 will document the state-of-art in developing such capabilities for wind turbine generators and both the system technical performance aspects of such controls and the impact of such controls on equipment design and performance.


  • Impact of wind generators on frequency and active power control of power systems, including:
    • Inertial based controls, which rely primarily on manipulation of electrical parameters (e.g. torque, power, excitation) and the energy balance between inertial energy of turbine-generator drive-train.
    • Governor-like controls, which substantively alter the mechanical power from the interaction of the turbine blades with the wind while manipulating electrical parameters
    • Curtailment, ramp-rate control, in which wind generator power production is limited in response to instruction by a supervisory control, including but not limited to, a wind plant control
    • Primary and secondary regulation with wind plants, using these controls
    • Systemic impacts and interaction between these controls, and controls on other generation and resources on the power grid, and general impact/improvement in power system dynamic performance
  •  State of the art of frequency-active power control of wind generators
    • Characteristics and implementation of present wind turbine-generator controls
    • Characteristics and implementation of present wind power plant controls, and the interaction between individual wind generators and plant supervisory controls
    • Examples and measurements from wind generators and wind plants
  •  Impact of frequency-active power control on wind generators
    • Impact on stator and rotor winding stress and design, including thermal, insulation, mechanical design
    • Impact on wind turbine-generator drive-train stress and design, including torsional and bearing stress, thrust and bedplate stress, tower stress
    • Impact on wind generator electrical design, including excitation/power converter rating and design
    • Impact of wind generator auxiliary design, including pitch actuators,
  •  Grid code and Standards requirements
    • Illustrative examples of language used in grid codes and standards to define specific requirements and expectations
    • Observations of the impact on stator and rotor winding stress and design, including thermal, insulation, mechanical design. Recommendations on applicable standards.

Convener: Nicholas Miller (USA)

Progress Report 2016 (pptx, 97kB)