Solving Multi-Objective Energy Management of a DC Microgrid using Multi-Objective Multiverse Optimization

Abstract

This paper deals with the multi-objective optimization dispatch (MOOD) problem in a DC microgrid. The aim is to formulate the MOOD to simultaneously minimize the operating cost, pollutant emission level of (NOx, SO2 and CO2) and the power loss of conversion devices. Taking into account the equality and inequality constraints of the system. Two approaches have been adopted to solve the MOOD issue. The scalarization approach is first introduced, which combines the weighted sum method with price penalty factor to aggregate objective functions and obtain Pareto optimal solutions. Whilst, the Pareto approach is based on the implementation of evolutionary multi-objective optimization solution. Single and multi-objective versions of multi-verse optimizer algorithm are, respectively, employed in both approaches to handle the MOOD. For each time step, a fuzzy set theory is selected to find the best compromise solution in the Pareto optimal set. The simulation results reveal that the Pareto approach achieves the best performances with a considerable decrease of 28.96 $/day in the daily operating cost, a slight reduction in the power loss of conversion devices from 419.79 kWh to 419.29 kWh, and in less computational time. While, it is noticing a small increment in the pollutant emission level from 11.54 kg/day to 12.21 kg/day, for the daily microgrid operation. This deviation can be fully covered when comparing the cost related to the treatment of these pollutants, which is only 5.55 $/day, to the significant reduction in the operating cost obtained using the Pareto approach.

Energy optimization management of microgrid using improved soft actor-critic algorithm

“…MGs, often incorporating renewable energy sources and energy storage, have emerged as viable solutions to address the chal-lenges of conventional centralized power systems (Ahmad et al, 2023;Mostefa et al, 2023). MGs, decentralized energy systems that can operate independently or in conjunction with the main grid, also offer a promising avenue for enhancing energy efficiency, resilience, and sustainability, which makes them well-suited for supporting peak load management on the main power grid (Mostefa et al, 2023;Lagouir et al, 2021).…”