A Retrofitting-based Supplementary Controller Design for Enhancing Damping Performance of Wind Power Systems
It addresses the stability challenge of integrating high levels of wind power into existing power grids, offering a controller that requires only local measurements.
The paper proposes a retrofit controller for doubly-fed induction generators in wind power plants that cancels adverse impacts of wind power flow on power system dynamics, enhancing damping performance even at high wind penetration levels as demonstrated on a 4-machine Kundur system.
In this paper we address the growing concerns of wind power integration from the perspective of power system dynamics and stability. We propose a new retrofit control technique where an additional controller is designed at the doubly-fed induction generator site inside the wind power plant. This controller cancels the adverse impacts of the power flow from the wind side to the grid side on the dynamics of the overall power system. The main advantage of this controller is that it can be implemented by feeding back only the wind states and wind bus voltage without depending on any of the other synchronous machines in the rest of the system. Through simulations of a 4-machine Kundur power system model we show that the retrofit can efficiently enhance the damping performance of the system variable despite very high values of wind penetration.