Representing wind turbine electrical generating systems in fundamental frequency simulations

TLDR

Increasing numbers of wind turbines are being erected, and they may soon influence electrical power system dynamics by interacting with conventional generation and loads, making their impact a key subject of power system dynamics simulations. The paper focuses on fundamental frequency (electromechanical transient) simulations of wind turbine generating systems. The authors employ fundamental frequency simulations, representing the network as an impedance matrix and considering only the fundamental frequency component of voltages and currents to reduce computation time, primarily for voltage and angle stability studies, and present wind turbine generating system models compatible with this approach. The presented wind turbine generating system models, aligned with the fundamental frequency simulation approach, show responses that match measurements.

Abstract

Increasing numbers of wind turbines are being erected. In the near future, they may start to influence the dynamics of electrical power systems by interacting with conventional generation equipment and with loads. The impact of wind turbines on the dynamics of electrical power systems therefore becomes an important subject, studied by means of power system dynamics simulations. Various types of power system dynamics simulations exist and the approach depends on the aspect of power system dynamic behavior being investigated. In this paper, the focus is on fundamental frequency simulations, also known as electromechanical transient simulations. In this type of simulation, the network is represented as an impedance matrix and only the fundamental frequency component of voltages and currents is taken into account in order to reduce the computation time. This simulation approach is mainly used for voltage and angle stability investigations. Models of wind turbine generating systems that match the fundamental frequency simulation approach are presented and their responses are compared to measurements.