Comparison between Hardware and Programming Solutions to Alleviate Influence of Voltage Dips on Wind Energy Systems
- Resource Type
- Conference
- Authors
- Ali, Samar; Elkholy, E. E.; Hegazy, Hosam; Awad, Hilmy
- Source
- 2021 22nd International Middle East Power Systems Conference (MEPCON) Middle East Power Systems Conference (MEPCON), 2021 22nd International. :45-50 Dec, 2021
- Subject
- Power, Energy and Industry Applications
Resistors
Resistance
Voltage fluctuations
Wind energy
Power system dynamics
Rotors
Low-pass filters
Crowbar
Series Dynamic Resistor
Voltage dips
- Language
The main objective of this paper is to study the influence of severe utility voltage dips on the wind-energy-based system. The system comprises a doubly-fed induction generator (DFIG), which allows for both stator and rotor control during unavoidable events such as voltage dips. Two different techniques have been applied to keep the wind system connected to the grid during faults. The first technique implements new crowbar protection by controlling the Rotor-Side Converter (RSC) switches so that either all the upper or lower switches are on. Doing so avoids the need for hardware components such as external resistors and switches. The second technique is to modify the applied control system of the DFIG to alleviate the influence of dips on the system quickly and accurately. The main applied modification is adding a low-pass filter to ensure the steadiness of the reference current of the RSC. Both applied techniques are validated via MATLAB/Simulink simulations. A thorough comparison is presented to illuminate the merits and demerits of each technique.