Abstract
In order to reduce the load demand of buildings in Japan, this study proposes a grid-tied hybrid solar–wind–hydrogen system that is equipped with a maximum power point tracking (MPPT) system, using a fuzzy logic control (FLC) algorithm. Compared with the existing MPPTs, the proposed MPPT provides rapid power control with small oscillations. The dynamic simulation of the proposed hybrid renewable energy system (HRES) was performed in MATLAB-Simulink, and the model results were validated using an experimental setup installed in the Chikushi campus, Kyushu University, Japan. The techno-economic analysis (TEA) of the proposed system was performed to estimate the optimal configuration of the proposed HRES, subject to satisfying the required annual load in the Chikushi campus. The results revealed a potential of 2% surplus power generation from the proposed HRES, using the FLC-based MPPT system, which can guarantee a lower levelized cost of electricity (LOCE) for the HRES and significant savings of 2.17 million yen per year. The TEA results show that reducing the cost of the solar system market will lead to a reduction in LCOE of the HRES in 2030.
Highlights
IntroductionThe earth faces a significant environmental problem, which is global warming
To overcome the drawbacks mentioned on the existing tracking systems, such as the perturbation and observation (P&O) method, this study aims at introducing a maximum power point tracking (MPPT) system based on fuzzy logic control (FLC), which provides rapid control, and small oscillations once it reaches the maximum power point (MPP), under varying weather conditions
The simulation results reveal that the output power based on the FLC-based MPPT is significantly higher than the P&O-based MPPT on cloudy days
Summary
The earth faces a significant environmental problem, which is global warming. Renewable energy is one of the best ways to solve this problem. Earthquake, the share of nuclear electricity in Japan has decreased significantly [1]. This is because the public’s concern about nuclear power plants has risen due to the nuclear accident. The dependence on thermal power generation has increased. Japan lacks energy resources; its energy self-sufficiency rate is meager compared to that of other OECD countries [2,3]
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