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

Background:
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.

Scope:

  • 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)