The generation of electricity,considering environmental and eco-nomic factors is one of the most important challenges of recent *** this article,a thermoelectric generator(TEG)is proposed to use the thermal energy of ...
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The generation of electricity,considering environmental and eco-nomic factors is one of the most important challenges of recent *** this article,a thermoelectric generator(TEG)is proposed to use the thermal energy of an electric water heater(EWH)to generate electricity *** improve the energy conversion efficiency of the TEG,a fuzzy logic con-troller(FLC)-based perturb&observe(P&O)type maximum power point tracking(MPPT)controlalgorithm is used in this *** EWH is one of the major electricity consuming household appliances which causes a higher electricity price for ***,a significant amount of thermal energy generated by EWH is wasted every day,especially during the winter *** recent years,TEGs have been widely developed to convert surplus or unused thermal energy into usable *** this context,the proposed model is designed to use the thermal energy stored in the EWH to generate *** addition,the generated electricity can be easily stored in a battery storage system to supply electricity to various household appliances with *** proposed MPPT controlalgorithm helps the system to quickly reach the optimal point corresponding to the maximum power output and maintains the system operating point at the maximum power output *** validate the usefulness of the proposed scheme,a study model was developed in the MATLAB Simulink environment and its performance was investigated by simulation under steady state and transient *** results of the study confirmed that the system is capable of generating adequate power from the available thermal energy of *** was also found that the output power and efficiency of the system can be improved by maintaining a higher temperature difference at the input terminals of the ***,the real-time temperature data of Abha city in Saudi Arabia is considered to analyze the feasibility of the proposed system for practical implementation.
This work presents an improved phase-locked loop (IPLL)-based control for grid-integrated photovoltaic (PV) system (GIPVS). It is used to extract amplitude, frequency, and phase angle of distorted load currents to con...
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This work presents an improved phase-locked loop (IPLL)-based control for grid-integrated photovoltaic (PV) system (GIPVS). It is used to extract amplitude, frequency, and phase angle of distorted load currents to control PV-grid-interfaced voltage source converter (VSC). The VSC controls active and reactive powers at unbalances and distortions in the grid voltages. The controlalgorithm of VSC includes power feed-forward term, DC-link voltage, and grid voltages. The feed-forward term improves the dynamic performance of a GIPVS and enhances the utilisation of VSC. Three-phase IPLLs extract the in-phase components of three-phase load currents at utility frequency. Further, these in-phase components of load currents are used for estimation of reference-grid currents. The proposed IPLL-based controlalgorithm offers good dynamic response even under unbalanced load condition. The efficient working of IPLL-based controlalgorithm is realised by extracting maximum power from PV-grid system and through its power-quality improvement. The perturb and observe (P & O) controlalgorithm is used for optimum utilisation of a PV array. A developed prototype of PV-grid system is used to implement an IPLL-based controlalgorithm under different operating conditions.
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