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Microgrids rely on energy management levels to optimally schedule their components. Conventionally, the research in this field has been focused on the optimal formulation of the generation or the demand side management separately without considering real case scenarios and validated only by simulation. This paper presents the power scheduling of a real site microgrid under a price-based demand response...
In this paper, a lineal mathematical model is proposed to schedule optimally the power references of the distributed energy resources in a grid-connected hybrid PV-wind-battery microgrid. The optimization of the short term scheduling problem is addressed through a mixed-integer linear programming mathematical model, wherein the cost of energy purchased from the main grid is minimized and profits for...
In this paper, a droop control based state-of-charge (SoC) balancing method in autonomous DC microgrids is proposed. Both charging and discharging process have been considered. In particular, in the charging process, the droop coefficient is set to be proportional to SoCn, and in the discharging process, the droop coefficient is set to be inversely proportional to SoCn. Since the injected/output power...
Multi-port DC/DC converters have been widely employed in stand-alone renewable power systems to provide stable and continuous power to the electrical loads. A full-bridge three-port converter (FB-TPC) interfacing a renewable source, a storage battery, and a load is proposed. The proposed FB-TPC integrates two Buck-boost converters into the primary side of the full-bridge topology, and the magnetizing...
In order to involve multiple different renewable energy sources and balance power flow, a four-port full-bridge converter (FPFBC) with distributed maximum power point tracking (DMPPT) is proposed for renewable power systems. This converter, featuring two input ports, one bidirectional port and one isolated output port, is derived by integrating two Buck-Boost converters and a full-bridge converter...
The thermoelectric generator (TEG) system is a dc power source based on Seebeck effect of TEG modules, which utilize the temperature difference between the hot side and the cold side to generate electric power. The output voltage of the TEG system is highly dependent on the temperature difference between the two sides of the thermoelectric modules and varies with a wide range. In this paper, a step-up...
With the progress of distributed generation nowadays, microgrid is employed to integrate different renewable energy sources into a certain area. For several kinds of renewable sources have DC outputs, DC microgrid has drawn more attention recently. Meanwhile, to deal with the uncertainty in the output of microgrid system, distributed energy storage is usually adopted. Considering that the state-of-charge...
The thermoelectric generation (TEG) system has its special charactristics of high stablility, low voltage and high current output, which is different from PV modules. The power conditioning system and control schemes used in PV applications cannot be directly applied to TEG applications. A power conditioning system for TEG based on interleaved Boost converter with maximum power point tracking (MPPT)...
DC microgrid is an effective solution to integrate renewable energy sources with conventional utility grid, especially for photovoltaic generation. A DC microgrid configuration based on modular photovoltaic generation system and energy storage devices, which features good redundancy and high efficiency, is investigated in this paper. In order to optimize energy utilization, a power management scheme...
A review of the literature about the types of battery models was presented. Development of the research on battery models was reviewed. Various types of battery models were described, and the characteristics of these battery models were discussed. Moreover, advantages and the problems need to be solved on battery models were summarized. Finally, the paper calls for an efficient model of the battery...
Due to the stochastic characteristic of photovoltaic (PV) generation, energy storage devices are indispensable to smooth the power flow and provide the electric energy with high quality. In this paper, an integrated DC/DC converter is proposed to realize high performance interfaces for PV array, battery and load. This converter consists of a boost converter for the PV array and a buck/boost converter...
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