Improving Transient Behavior of a Brushless Doubly Fed Induction Generator through Reactive Current Control of Grid-Side Converter

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ID: 266643
2021
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Abstract
Brushless doubly-fed induction generators have higher reliability, making them an attractive choice for not only offshore applications but also for remote locations. These generators are composed of two back-to-back voltage source converters, a grid side converter and a rotor side converter. Existing techniques use the rotor side converter for reactive current control; however, it is more suitable for stabilizing steady state behavior. In order to stabilize the voltage fluctuations at the point of common coupling (PCC) due to sudden inductive load introduction, the grid side converter may be a better choice due to faster response and higher control bandwidth. Therefore, this paper proposes a control scheme for the grid side converter to suppress the PCC voltage fluctuations when a large inductive load is suddenly connected. The proposed technique is based on an analytical model of the transient behavior of the voltage drop at the PCC. The analysis shows that reactive current control using the grid side converter introduces a double fundamental frequency component to the PCC voltage. To block this harmonic, we designed a notch filter. The simulation results in Matlab/Simulink show that the proposed technique can not only significantly reduce the voltage drop but also results in an 82% reduction in voltage distortion at the PCC.
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Authors Ahsanullah Memon;Mohd Wazir Mustafa;Muhammad Naveed Aman;Abdul Hafeez;Mukhtar Ullah;Memon, Ahsanullah;Mustafa, Mohd Wazir;Aman, Muhammad Naveed;Hafeez, Abdul;Ullah, Mukhtar;
Journal Electronics
Year 2021
DOI
10.3390/electronics10121413
URL
https://www.mdpi.com/2079-9292/10/12/1413
Keywords
renewable energy brushless low voltage ride through wind-turbines

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