NREL works with the solar and wind industries to provide utilities and grid operators with generator models to help them analyze the impact of variable generation on power system performance and reliability. As the amount of variable generation increases, the need for such models increases. Ensuring the models are as generic as possible allows for ease of use, model validation, data exchange, and analysis. To address this need, NREL researchers are developing generic dynamic models of wind and solar power plants.
NREL's dynamic modeling efforts include:
Collecting wind plant output data with corresponding wind resource data (speed, direction, and air density) from meteorological towers and performing multivariate analysis of the data to develop an equivalent wind plant power curve
Analyzing extreme wind ramping events to identify rare events that can significantly impact system operations
Developing photovoltaic (PV) plant models that consist of PV array, inverter, protection, and control system component models
Developing PV plant models in three-phase, cycle-by-cycle electromagnetic transient program
Validating PV inverter model performance with laboratory and field test results
Examining the short-circuit behavior of wind and solar power plants.
These efforts contribute to a better understanding of how solar and wind power plants can impact grid stability and reliability.
For More Information
For more information about wind generator modeling, see the following resources. Additional publications can be found in the NREL Publications Database.
Understanding Inertial and Frequency Response of Wind Power Plants
This paper analyzes and quantifies the inertia and frequency responses of wind power plants with different wind turbine technologies.
Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator
This paper presents test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility.
Symmetrical and Unsymmetrical Fault Currents of a Wind Power Plant
This paper investigates the short-circuit behavior of a wind power plant for different types of wind turbines. Both symmetrical faults and unsymmetrical faults are investigated.
Dynamic Model Validation of PV Inverters Under Short-Circuit Conditions
This paper validates a PV inverter dynamic model against benchtesting under short-circuit conditions. The equivalent circuits and results are given in three-phase quantities and also in positive, negative, and zero sequence quantities.