Abstract
In this paper the dynamic behavior of different wind turbine generator configurations including doubly fed induction generators (DFIG), squirrel cage induction generator (SCIG), wound rotor induction generator (WRIG), and permanent magnet synchronous generator (PMSG) under ferroresonant conditions of energization and de-energization was investigated using Simulink/MATLAB (version 2017B, MathWorks, Natick, MA, USA). The result showed that SCIG had the highest overvoltage of 10.1 PU during energization, followed by WRIG and PMSG, while the least was DFIG. During de-energization, PMSG had the highest overvoltage of 9.58 PU while WRIG had the least. Characterization of the ferroresonance was done using a phase plane diagram to identify the harmfulness of the ferroresonance existing in the system. It was observed that for most of the wind turbine configurations, a chaotic mode of ferroresonance exists for both energization and de-energization scenarios. Although overvoltage during energization for wind turbine generator configurations was higher than in the de-energization with an exception of PMSG, their phase plane diagrams showed that de-energization scenarios were more chaotic than energization scenarios. The study showed that WRIG was the least susceptible to ferroresonance while PMSG was the most susceptible to ferroresonance.
Highlights
IntroductionDuring the last six decades, power produced from wind turbines has grown from 20 kW to
During the last six decades, power produced from wind turbines has grown from 20 kW to Gedser wind turbine concept developed in 1957, which was the first wind turbine to produce 20 kW [1].One such modification was the introduction of the variable pitch blade; another modification was the introduction of asynchronous generators with wound rotors
The behavior of different wind turbine configurations was investigated during the ferroresonant conditions to determine their level of overvoltage and the mode of ferroresonance existing in each wind turbine configuration
Summary
During the last six decades, power produced from wind turbines has grown from 20 kW to. Different technological concepts of the wind turbine generators obtained were from different combinational configurations of generators, power electronics, and control strategies These have provided solutions to contingencies that arose from grid connected wind energy resulting in improved system efficiency and effectiveness [1,2]. In this paper, the dynamic behavior of four wind turbine types namely: DFIG, SCIG, WRIG and PMSG, were analyzed during ferroresonant events. Neto et al carried out a dynamic analysis of a grid connected wind farm using ATP software They considered three configurations: DFIG, SCIG, and PMSG, while evaluating their behavior during the occurrence of disturbances on the wind farm. Erlich and Shewarega carried out simulations of system dynamics on wind turbines They observed the response of the control system to a three phase grid fault on DFIG and PMSG.
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