Abstract
This paper attempted to control a hybrid DC microgrid in islanded operation mode using decentralized power management strategies. Proposed adaptive I/V characteristic for hybrid photovoltaic (PV) and battery energy storage system (BESS) and wind turbine generator (WTG) adapts the distributed energy resources (DER) behavior independently in accordance with the load demand. Hence, the PV module can spend its maximum power on load demand and spend the extra power for charging the BESS, which will regulate DC bus voltage and maintain the power balance within the microgrid. When load demand is beyond the maximum generation power of PV unit, WTG will supply the energy shortage. The proposed control system was applied on the DC microgrid in order to achieve control objectives through a decentralized procedure, without telecommunication links. In order to validate the proposed strategies, the control system was implemented on a DC microgrid within MATLAB/SIMULINK, where the simulation results were analyzed and validated.
Highlights
Microgrid refers to an integration of loads and distributed generation (DG) sources in low or medium voltage levels functioning as a power system for power generation and, if possible, as combined heat and power (CHP) [1,2,3,4]
A DC microgrid composed of a PV/battery energy storage system (BESS) hybrid module, wind turbine generator (WTG) and linear load was simulated in MATLAB/SIMULINK so as to evaluate the performance of proposed control strategy
This paper proposed a decentralized control strategy for power management of DC microgrid composed of a hybrid PV/battery unit and WTG in isolated mode
Summary
Microgrid refers to an integration of loads and distributed generation (DG) sources in low or medium voltage levels functioning as a power system for power generation and, if possible, as combined heat and power (CHP) [1,2,3,4]. Electrical energy generation sources used in microgrids can be micro-turbines, fuel cells, PV solar cells, WTG or other forms of distributed generation along with any storage devices such as super-capacitors and batteries [5,6]. Due to population growth and increased demand for electrical energy, there have been great challenges in increasing environmental pollution, depleting fossil fuels, limited construction of new transmission lines, greater reliability as well as changes and economic developments in the electricity market, all of which requiring higher level of DGs. With the progress made in distributed generation technology, there have been many advantages together with numerous problems in terms of network operation and protection. One of the problems arising due to the growth and development of power systems is the aggravated level of fault current and short circuit because to the presence of DGs within a microgrid. It is crucial to coordinate DG and BESS units in order to avoid that the power generated by DG may collapse the system when BESS are full of the charge and there is a power unbalance in the microgrid
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
