Abstract
Renewable Energy Sources (like wind energy) minimize the demand for other types of power. Wind energy generation has become a major power in some countries, covering the essential share in the Energy Balance in Holland, Spain, Brazil, Germany, China and others. The construction of new Wind Power causes new challenges for the transmission distribution infrastructure. However, environmentally friendly Renewable Energy has recently become an important part of generation in industrial applications, worth for distributed lines expansion. A significant part of electric machines used in Wind Industry are doubly fed induction motors (DFIM) used as electric generators. They earned the leading market position over the recent decade and continue their run. The machines of this type offer operation stability along with affordable costs. The outstanding technical benefits include the ability for variable speed operation and independent control of reactive and active power. To protect the rotor side converter (RSC) from transient overcurrent during voltage dips, the crowbar circuit protection is usually used. The paper analyzes and investigates the dynamic behavior of the doubly-fed induction motor, back-to-back converter, and the rotor side converter during symmetrical voltage dips using the crowbar protection system with MATLAB/Simulink simulation. In addition, it studies the crowbar circuit affects the diodes, switches, and resistances at the low voltage ride through (LVRT) capability enhancement.
Highlights
According to the reports of World Wind Energy Association, the overall capacity of the wind turbines installed worldwide by the end of 2017 reached 539.291 Gigawatt (GW), added extra 2.6 GW in 2017
Since the wind farms consist of big wind turbines, they require being more controllable both in reactive and active power, at the same time having a low voltage ride through (LVRT) capability when a fault occurs
The shown transformations illustrate that when a voltage dip occurs, the stator flux cannot get to its steady state as fast as the stator voltage does
Summary
IMPACTS OF VOLTAGE DIPS IN DOUBLY FED INDUCTION MOTOR FOR WIND TURBINE GENERATION SYSTEMS. A significant part of electric machines used in Wind Industry are doubly fed induction motors (DFIM) used as electric generators They earned the leading market position over the recent decade and continue their run. The paper analyzes and investigates the dynamic behavior of the doubly-fed induction motor, back-to-back converter, and the rotor side converter during symmetrical voltage dips using the crowbar protection system with MATLAB/Simulink simulation. It studies the crowbar circuit affects the diodes, switches, and resistances at the low voltage ride through (LVRT) capability enhancement
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