Dynamic modeling of doubly fed induction generator wind turbines

Abstract

It is now recognized that many large wind farms will employ doubly fed induction generator (DFIG) variable speed wind turbines. A number of such wind farms are already in operation and more are planned or under construction. With the rising penetration of wind power into electricity networks, increasingly comprehensive studies are required to identify the interaction between the wind farm(s) and the power system. These require accurate models of doubly fed induction generator wind turbines and their associated control and protection circuits. A dynamic model has been derived, which can be used to simulate the DFIG wind turbine using a single-cage and double-cage representation of the generator rotor, as well as a representation of its control and protection circuits. The model is suitable for use in transient stability programs that can be used to investigate large power systems. The behavior of a wind farm and the network under various system disturbances was studied using this dynamic model. The influence of the DFIG control on the stability of the wind farm was also investigated by considering different control gains and by applying network voltage control through both stator side and rotor side converters.

Dynamic modeling and control of doubly fed induction generators driven by wind turbines

“…As in [3], [5], [7], [10], the shaft system is simply modeled as a single lumped-mass system with the lumped inertia constant H m , calculated by. …”

“…Much research effort has gone into modeling the DFIG wind turbines and studying their impact on the dynamic performance of the power system [2]- [10]. In these works, the power electronic converter models are simplified as controlled ideal voltage-sources or current-sources.…”

Shutdown of an offshore wind power plant without using a brake to meet the required ramp rate in various storm-driven conditions

“…INTRODUCTION general characteristic of wind generators (WGs) is that their output power depends on the wind speed, commonly specified by what is denoted a power curve. The power curve of a WG describes the steady-state relationship between wind speed at the WG hub-height and its output power [1,2]. The WG starts producing at cut-in wind speeds, typically around 4−5 m/s, and then the power increases with about the cube of the wind speed until rated power is reached at the rated wind speed, typically around 12−15 m/s.…”

Transient Behavior of Doubly Fed Induction Generator Using Simulink Model in Wind Energy Conversion System

“…Luna et al [1] presented a deducted mathematical model of DFIG along with simulations & experimental results using PSCAD/EMTDC software. They simplified the modelling of DFIG in stator voltage, active & reactive power, stator current Liserre and Molinas [2] presented the most-adopted wind-turbine systems, the adopted generators, the topologies of the converters, the generator control and grid connection issues, as well as their arrangement in wind parks Ekanayake et al [3] presented an accurate model of DFIG wind turbines and their associated control & protection circuits. A dynamic model had been prepared, to simulate the DFIG wind turbine using a single -cage and double -cage representation of the generator rotor, as well as a representation of its control and protection circuits.…”