Abstract
Due to its many advantages such as the improved power quality, high energy efficiency and controllability, etc. the variable speed wind turbine using a doubly fed induction generator (DFIG) is becoming a popular concept and thus the modeling of the DFIG based wind turbine and improvement in the transient fault conditions is an important consideration. In this paper, Transient stability improvement has been done by using Superfluous Fault Current Limiter [SFCL]. A new design of SFCL IGBT- Bridge-type SFCL shunted with a variable resistor Rsh has been proposed. Rsh is modeled to decrease the terminal voltage deviation to minimum level by reducing the amount of current at the bus terminal. Comparison of Voltage deviation and current deviation with the resistive type SFCL and IGBT- bridge-type SFCL show considerable decrease in both quantities by using IGBT- bridge-type SFCL. The values of voltage deviation at the bus terminal is 8.223 e-8 % for proposed SFCL which is less than the resistive type SFCL that is, 14.4 e-8 %. The huge voltage sag has been considerably reduced by reduction of high level of current to 0.0004401 % in IGBT-bridge-Type SFCL from 0.0004624% in resistive type SFCL. Thus proposed SFCL has caused significant improvement in transient stability keeping the deviation in active and reactive power during faults to minimum level.
Highlights
Renewable energies have the potential to reduce pollution, slow global warming and create new industries and jobs
This study proposes the use of insulated-gate bipolar transistor (IGBT)-bridge-Type SFCL to improve the transient stability of a doubly fed induction generator (DFIG) based wind power system
Bridge-Type SFCL) is able to enhance the transient stability of the DFIG system for both the symmetrical and asymmetrical faults more efficiently than the DC Resistive type SFCL
Summary
Renewable energies have the potential to reduce pollution, slow global warming and create new industries and jobs. There are huge economic opportunities for countries that invent, produce and export clean energy technologies. The use of renewable energies has become a global research and development problem. Wind power is one of the fastest growing renewable technologies and has the potential to meet a significant portion of our electricity needs. It is considered an energy source that allows electricity to be produced with minimal environmental disturbance.
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