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Modeling, Control and Power Management Strategy of a Grid connected Hybrid Energy System Sujit Kumar Bhuyan; Prakash Kumar Hota; Bhagabat Panda
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 3: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1141.622 KB) | DOI: 10.11591/ijece.v8i3.pp1345-1356

Abstract

This paper presents the detailed modeling of various components of a grid connected hybrid energy system (HES) consisting of a photovoltaic (PV) system, a solid oxide fuel cell (SOFC), an electrolyzer and a hydrogen storage tank with a power flow controller. Also, a valve controlled by the proposed controller decides how much amount of fuel is consumed by fuel cell according to the load demand. In this paper fuel cell is used instead of battery bank because fuel cell is free from pollution. The control and power management strategies are also developed. When the PV power is sufficient then it can fulfill the load demand as well as feeds the extra power to the electrolyzer. By using the electrolyzer, the hydrogen is generated from the water and stored in storage tank and this hydrogen act as a fuel to SOFC. If the availability of the power from the PV system cannot fulfill the load demand, then the fuel cell fulfills the required load demand. The SOFC takes required amount of hydrogen as fuel, which is controlled by the PID controller through a valve. Effectiveness of this technology is verified by the help of computer simulations in MATLAB/SIMULINK environment under various loading conditions and promising results are obtained.
Modeling and Simulation of Grid Connected Hybrid Energy System and its Fault Analysis Sujit Kumar Bhuyan; Prakash Kumar Hota; Bhagabata Panda
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 2: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (478.72 KB) | DOI: 10.11591/ijpeds.v9.i2.pp775-783

Abstract

This paper represents a hybrid energy system (HES) consisting of photovoltaic (PV), Solid Oxide Fuel Cell (SOFC), electrolyzer system and a storage tank. In this proposed system a fuel cell controller is used where a PID controller is utilized to control the flow of hydrogen (H2) through the valve to the SOFC to fulfill the load requirement. In this model a supervisory controller is used to regulate the whole system according to load requirement. So, when PV power is more than load requirement, then PV power fulfill the required load demand as well as the extra power of PV is utilized to generate the hydrogen (H2) by the help of electrolyzer, further this hydrogen is used as a fuel of SOFC. Also in this proposed model different types of faults are considered and verified their effect on the load as well as in distribution network. The computer simulations are done for the purpose technology and verified its effectiveness. Hence the appropriate results are obtained.