Title: Robust hydro-thermal power system controller considering energy capacitor system and wind power source

Authors: Thongchart Kerdphol; Yaser Soilman Qudaih; Khairudin H. Basri; Yasunori Mitani

Addresses: Department of Electrical and Electronics Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka, 804-8550, Japan ' Department of Electrical and Electronics Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka, 804-8550, Japan ' Department of Electrical and Electronics Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka, 804-8550, Japan ' Department of Electrical and Electronics Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka, 804-8550, Japan

Abstract: This paper presents the method to design the robust controller for the hydro thermal system considering interconnection of two areas. The feasibility of using the automatic generation control with energy capacitor system is implemented to both areas. Wind turbines are considered to be one of the most used alternative sources of energy to solve global warming worldwide. The output of wind turbines depends on the weather condition which causes large fluctuation in the power output when WTs connect to the system. So, the system should be capable of handling uncertainties caused by the wind turbines and load variations. H_∞ loop-shaping method is designed as the proposed controller which is used to regulate and improve system stability in the hydro thermal power system. Results demonstrate that the hydro thermal system with CS-based H_∞-controller gives higher system stability and more robustness than the hydro thermal system with ECS-based PID controller.

Keywords: energy capacitor systems; ECS; H-infinity control; LSDP; loop-shaping design procedure; power system oscillation; robust control; wind energy; wind power; controller design; hydro-thermal power; uncertainties; wind turbines; load variations.

DOI: 10.1504/IJPSE.2015.071430

International Journal of Process Systems Engineering, 2015 Vol.3 No.1/2/3, pp.90 - 109

Received: 27 Aug 2014
Accepted: 01 Mar 2015
Published online: 27 Aug 2015 *

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