Optimal Control of DFIG Wind Energy System in Multi-machine Power System using Advanced Differential Evolution

Abstract

The Vector controlled doubly fed induction generator (DFIG) wind energy system in a multi-machine power system is very sensitive to faults on transmission lines and thus affects the stability of the system. The performance of vector controlled DFIG highly depends on PI controller parameters. The objective of this paper is to optimize the performance of vector controlled DFIG in multi-machine power systems under faulty conditions by tuning the parameters using advanced differential evolution algorithm. An objective function is formulated, which drives the system with good voltage profile, reduced power oscillations under faulty conditions. The parameters of PI controller are tuned using Composite Differential Evolution algorithm. Simulations are performed on a two area benchmark problem in Matlab/Simulink. The simulation results of the optimized DFIG wind energy system are compared with the actual existed system. The simulation results show that the overall performance and stability of the optimized system are enhanced.

KEYWORDS:

• DFIG
• Differential evolution
• Multi-machine system
• Vector control

Additional information

Notes on contributors

Ayyarao S. L. V. Tummala

Ayyarao S L V Tummala received BTech degree in electrical & electronics engineering from JNTU, Andhra Pradesh, India in 2005 and MTech degree from JNTUK, Andhra Pradesh, India in 2009. At present, he is working as an assistant professor in the department of Electrical & Electronics Engineering from GMR Institute of Technology, Rajam, India and pursuing PhD from Acharya Nagarjuna University.

Hemanth K. R. Alluri

Hemanth K R Alluri received BTech degree in electrical & electronics engineering from JNTU Kakinada, Andhra Pradesh, India and received his MTech degree in power & industrial drives in the department of Electrical & Electronics Engineering from GMR Institute of Technology, Rajam, India. Currently, he is working in SRKR Engineering College, India.Email: [email protected]

P. V. Ramanarao

P V Ramanarao is working as a professor in the department of Electrical & Electronics Engineering, Acharya Nagarjuna University. His areas of research include power system stabilizers, DFIG controller for wind power generation, wavelet-based protection of power system, application of conventional PID and fractional order PID and intelligent-based controller.Email: [email protected]