Abstract
The energy sector is evolving rapidly, namely due to the increasing importance of renewable energy sources. The connection of large amounts of wind power generation poses new challenges for the dynamic voltage stability analysis of an electric power system, which has to be studied. In this paper, the traditional Doubly-Fed Induction Generator model is employed. Based on this model, a crowbar and chopper circuit is set up to protect the turbine during the short-circuit period. The EUROSTAG software package was used for the simulation studies of the system, and numerical results were obtained. Conclusions are drawn that provide a better understanding of the influence of crowbar and chopper protection on Doubly-Fed Induction Generators (DFIG), during low voltage ride through, in a system with wind power generation.
Highlights
Wind power generation is developing more and more quickly around the world.Doubly-Fed Induction Generators (DFIG) are used in many wind farms [1]
The DC voltage will rise due to the increase in the rotor current (Figure 7c1), which flows through the Rotor Side Converter (RSC)
The influence of crowbar and chopper protection on DFIG, during low voltage ride through, in an electric power system with wind power generation, considering the two doubly-fed induction generator protection devices, was studied, and the results presented in this paper
Summary
Wind power generation is developing more and more quickly around the world. Zone (1) corresponds to the fault and recovery mode when the voltage is below 90% of the nominal system voltage (0.9 p.u.), following the occurrence of a fault In this case, the wind power plant should provide the grid (with a maximum delay of 50 milliseconds after detection of the voltage dip), at any time, with a quantity of reactive energy that lies within zone (1) of Figure 2. Zone (2) corresponds to the normal operating mode, with the voltage at the terminals of the power supply being above 90% of the nominal voltage In this case, the wind power plant shall provide reactive power in accordance with the normal regime in force
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