Optimal sizing of grid-tied hybrid renewable energy systems considering inverter to PV ratio—A case study

Abstract

In this paper, a techno-economic optimum configuration process is assessed for hybrid power systems in terms of different generation capacities. It will provide a basis for the configuration of a practical microgrid. Initially, the actual power demand in a particular university area, namely, Khulna University of Engineering & Technology in Bangladesh, is measured, and then, the process of designing the optimized model is demonstrated with an initial choice of various parameters and constraints. Its inputs are climate data, electrical loads, technical and economic parameters of the equipment used for generation, sensitivity variables, grid parameters, and project economics and constraints. The best mix of solar photovoltaics (PV) and wind power is determined considering the most profitable size of the PV's inverter for different plants. The optimization results obtained through HOMER show that a specific PV panel does not need an inverter of the same capacity and a smaller one results in a lower investment. The analysis has been carried out by considering annual increase rates of both the load and the grid power price, which makes the result more realistic. The optimal size and control strategy are determined based on the net present cost, levelized cost of energy, increased rates of load and grid price, renewable fraction, and greenhouse gas emissions. A comparative analysis between the fixed and variable data for load and cost demonstrates that an optimal inverter-PV ratio, with the best mix of PV and wind energy, provides an optimum solution for all models. An economically viable plant size of 1.5 MW for the considered case is achieved.

Feasibility Assessment of Hybrid Solar Photovoltaic-Biogas Generator Based Charging Station: A Case of Easy Bike and Auto Rickshaw Scenario in a Developing Nation

“…It is necessary to analyze the environmental benefits to obtain the optimum system configuration [42]. The proposed system considers different GHGs such as CO 2 , CO, SO 2 , and NO X to estimate environmental feasibility [43]. The average grid emission factor is considered to be 0.67 tons of CO 2 per MWh, and the lifetime is 25 years.…”

A chronological review of prospects of solar photovoltaic systems in Bangladesh: Feasibility study analysis, policies, barriers, and recommendations

“…A lot of research activities and projects are designed and planned to utilise the available renewable energy sources. Numerous hybrid power plants, like solar‐wind, solar‐wind‐diesel, solar‐wind‐biomass‐diesel, and solar‐wind‐hydro, are designed, and the feasibility of the system is analysed [67–87]. Based on the geographic and spatial data, twenty‐one feasibility study data are plotted in Figure 5.…”

“…The COE and NPC of the system vary from one to another, depending on the system size. The COE for the most optimised system of [67–82, 84, 86, 87] are plotted in Figure 8. It is seen that the COE is lower ($0.128) in Dinajpur [70] and higher ($0.75) in Comilla [76].…”

“…FIGURE 7Annual average irradiance in different locations of articles[67][68][69][70][71][72][73][74][75][76][77][82][83][84][85][86][87] …”

Technical design and optimal energy management of a hybrid photovoltaic biogas energy system using multi‐objective grey wolf optimisation

“…Moreover, Nurunnabi et al investigated a techno‐economic analysis for grid‐tied combination of PV and wind hybrid MW‐scale power plants. Optimisation results were obtained by HOMER simulator, and these results were carried out on both cost and environmental basis, with taking into consideration the annual variation of load demand and energy prices to make the system more realistic [15]. However, only a grid‐connected system was investigated with no comparison with the off‐grid case.…”