Study on the Economic and Technical Optimization of Hybrid Rural Microgrids Integrating Wind, Solar, Biogas, and Energy Storage with AC/DC Conversion

Hu Tan; Xiaoliang Wang; Tingting Xu; Ke Zhao; Lianchao Su; Wenyu Zhang; Zheng Xin

doi:10.4108/ew.5803

Authors

Hu Tan State Grid Shandong Electric Power Company
Xiaoliang Wang State Grid Shandong Electric Power Company
Tingting Xu State Grid Shandong Electric Power Company
Ke Zhao State Grid Shandong Electric Power Company
Lianchao Su State Grid Shandong Electric Power Company
Wenyu Zhang State Grid Shandong Electric Power Company
Zheng Xin Shandong Jianzhu University

DOI:

https://doi.org/10.4108/ew.5803

Keywords:

Electricity Market, Multi-Energy Complementary System, Rural Microgrid, Integration of Generation, Grid, Load and Storage, Economic and Technical Analysis

Abstract

Under the guidance of the 'dual carbon' goals and 'rural revitalization' strategy, the development of microgrids primarily based on wind, solar, and biogas energy is rapidly advancing in rural areas. A critical and challenging area of current research is how to optimally configure the capacity of these microgrids of varying sizes, taking into account the availability of resources in the system's environment and specific climatic conditions, to maximize economic benefits. Based on this, the article constructs a model of a hybrid AC/DC microgrid system powered by wind, solar, and biogas energy. It undertakes multi-objective optimization to achieve the highest utilization of renewable energy, the most economical cost, and the minimum carbon emissions while ensuring the reliability of the system's power supply. The study explores the economically and technically optimal configuration of this microgrid energy system under certain climatic conditions. The results indicate that the optimal configuration for a rural microgrid powered by wind, solar, and biogas energy should include a 2.6 kW biogas generator, 30.00 kW solar panels, 5.24 kW wind turbines, a 2.6 kW battery storage system, and a 10.00 kW bidirectional inverter. This configuration results in the lowest total net cost of the system, achieving optimal outcomes in terms of total net cost, cost per kilowatt-hour, and supply reliability.

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