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All Journal International Journal of Applied Power Engineering (IJAPE)
Almoataz Y. Abdelaziz
Faculty of Engineering & Technology, Future University in Egypt, Cairo, Egypt
Electrical & Electronics Engineering

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Enhancement of power system performance with wind farm disturbances Mahmoud M. El-Sharkawy; Mahmoud A. Attia; Almoataz Y. Abdelaziz
International Journal of Applied Power Engineering (IJAPE) Vol 8, No 2: August 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (572.684 KB) | DOI: 10.11591/ijape.v8.i2.pp159-172

Abstract

This paper discussed how wind farm disturbance, especially wind speed variability, can affect the performance of the power system. Also, it discussed how blades angels of wind turbine can be controlled to increase the energy efficacy of the power system. It showed that the optimized pitch angel controller using harmony search algorithm could enhance blades angels’ adjustments performance. First part, the paper explained the advantages of doubly fed induction generator in wind turbine system. Paper also enumerated the most probable ways to tame the wind speed variability challenge focusing on the pitch angle controller technique. After that, paper compared the system parameter`s result before optimization with values after optimized pitch angle controller gain (Kp). This comparison would be held in three cases, case of variable wind speed with normal operation condition, constant wind speed with line to ground fault condition and variable wind speed with line to ground fault condition. Finally, It demonstrated the MATLAB/SIMULINK model used illustrating results appeared and conclusion.
Reactive power control to enhance the VSC-HVDC system performance under faulty and normal conditions Mohamed S. Ghayad; Niveen M. Badra; Almoataz Y. Abdelaziz; Mahmoud A. Attia
International Journal of Applied Power Engineering (IJAPE) Vol 8, No 2: August 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (834.807 KB) | DOI: 10.11591/ijape.v8.i2.pp145-158

Abstract

This paper studied the reactive power control of the voltage source converters based high-voltage direct current system (VSC-HVDC). PI (proportional & integration) controller was used in this work to enhance the dynamic response of the system. Gravitational search algorithm (GSA) and sine cosine algorithm (SCA) are used to get optimal parameters of the PI controller. GSA algorithm is based on the gravity law for Newton while SCA depends on mathematical model based on cosine and sine functions. These algorithms have an efficient global Search capability. The VSC-HVDC is exposed to different disturbances for checking the controller robustness. First disturbance was applying three phase faults on the system. While the second one was applying a step change in AC voltage. Finally, Applying step change in regulators reference values. Simulation results proved the controller superiority also verified the enhancement of the system dynamic response.
Co-Authors Mahmoud A. Attia Mahmoud A. Attia Mahmoud M. El-Sharkawy Mohamed S. Ghayad Niveen M. Badra