A multi-objective model for optimal operation of a battery/PV/fuel cell/grid hybrid energy system using weighted sum technique and fuzzy satisfying approach considering responsible load management

The hybrid renewable energy system is a promising and significant technology for clean and sustainable island power supply. Among the abundant ocean energy sources, tidal current energy appears to be very valuable due to its excellent predictability and stability, particularly compared with the intermittent wind and solar energy. In this paper, an island hybrid energy microgrid composed of photovoltaic, wind, tidal current, battery and diesel is constructed according to the actual energy sources. A sizing optimization method based on improved multi-objective grey wolf optimizer (IMOGWO) is presented to optimize the hybrid energy system. The proposed method is applied to determine the optimal system size, which is a multi-objective problem including the minimization of annualized cost of system (CACS) and deficiency of power supply probability (DPSP). MATLAB software is utilized to program and simulate the hybrid energy system. Optimization results confirm that IMOGWO is feasible to optimally size the system, and the energy management strategy effectively matches the requirements of system operation. Furthermore, comparison of hybrid systems with and without tidal current turbines is undertaken to confirm that the utilization of tidal current turbines can contribute to enhancing system reliability and reducing system investment, especially in areas with abundant tidal energy sources.

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Hydrogen fuel and electricity generation from a new hybrid energy system based on wind and solar energies and alkaline fuel cell

Energy Reports ◽

10.1016/j.egyr.2021.04.060 ◽

2021 ◽

Vol 7 ◽

pp. 2594-2604

Author(s):

Zhanlei Wang ◽

Xiaoqiang Zhang ◽

Ali Rezazadeh

Keyword(s):

Fuel Cell ◽

Electricity Generation ◽

Energy System ◽

Alkaline Fuel Cell ◽

Hydrogen Fuel ◽

Hybrid Energy System ◽

Hybrid Energy

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Modeling, Control and Power Management Strategy of a Grid connected Hybrid Energy System

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v8i3.pp1345-1356 ◽

2018 ◽

Vol 8 (3) ◽

pp. 1345 ◽

Cited By ~ 3

Author(s):

Sujit Kumar Bhuyan ◽

Prakash Kumar Hota ◽

Bhagabat Panda

Keyword(s):

Fuel Cell ◽

Power Management ◽

Storage Tank ◽

Power Flow ◽

Management Strategies ◽

Energy System ◽

Pv System ◽

Hybrid Energy System ◽

Hybrid Energy ◽

Load Demand

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.

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