Convergence Analysis of Capacities for Photovoltaics and Energy Storage System Considering Energy Self-Sufficiency Rates and Load Patterns of Rural Areas

Abstract

This work is a case study of 905 households, to present methods for optimizing the capacity of photovoltaic sytems (PVs)/energy storage systems (ESSs) for household to reach a desired energy self-sufficiency (70% to 90%). In order to calculate the capacity of PV and ESSs that would enhance the energy self-sufficiency of families in rural areas, the solar radiance data of the target area for the last five years and the average monthly power usage in the previous year were collected. Then, households with an average energy consumption of 250 kWh per month were chosen for this research. According to the simulation done using Solar Pro, the optimized capacities of PVs and ESSs are 2.67 kW and 7.15 kW, respectively, in order to achieve 90% energy self-sufficiency. We visualized the change in the optimum capacity of PVs and ESSs for the desired energy self-sufficiency. This study would be the base work for forming a grid-distributed energy network system by expanding the system to a national scale.

Capacity Design and Cost Analysis of Converged Renewable Energy Resources by Considering Base Load Conditions in Residential and Industrial Areas

“…In the referenced study, the capacities of solar power generation and the ESS system were designed considering the load pattern and energy independence rate of the rural area [9]. The method of designing the capacity of PV power generation and ESS devices was as follows.…”

“…Government strategies to encourage the use of various types of renewable energy to solve global warming and environmental problems are being developed around the world, and a microgrid system that supplies power to a small area has been introduced for the spread of renewable energy. Microgrids using renewable energy resources are increasingly in use, and various design techniques to optimize the facility capacity of the microgrid components (photovoltaic power generation and an energy storage system) have been proposed in many papers [1][2][3][4][5][6][7][8][9][10]. In most papers, PV (photovoltaic) power generation or wind power generation was adopted as the main energy source of the microgrid system, and an ESS (energy storage system) was added to increase the utilization rate of the renewable energy.…”

“…We had previously suggested an optimal design method for the facility capacity of microgrids using the loads and load patterns of non-isolated areas. This study aims to improve the feasibility and completeness of the proposed microgrid design by improving the technique [9]. In the referenced study, a self-contained microgrid supplied the customer's power load using only PV power generation and an ESS without receiving energy from electrical power systems.…”

“…In the referenced study, a self-contained microgrid supplied the customer's power load using only PV power generation and an ESS without receiving energy from electrical power systems. In such a self-contained microgrid, a stable power supply is the top priority [9,[13][14][15][16]]. However, PV power generation is affected by the weather and the limited daytime hours, and the stability of the power supply is relatively poor.…”

Return of Interest Planning for Photovoltaics Connected with Energy Storage System by Considering Maximum Power Demand

“…[5] Under the governmental policies, it would be difficult to achieve realistic conditions and result in over-estimated size of PV-ESS system. Study has been done to solve this problem by deriving optimized capacity of PV and ESS, while considering the power consumption of each household [6] In the recent past, the investment in PV systems and wind power has been increasing every year. This is the result of rapid growth in the PV industry in China, which has the world's biggest market economy.…”