Optimal energy management of a grid-connected micro-hydrokinetic with pumped hydro storage system

Abstract

This paper proposes an optimal energy management model for a grid-connected micro-hydrokinetic pumped hydro storage (MHK-PHS) system supplying the industrial load profile. The aim of the study is to investigate the behavior of model when minimizing the grid energy costs through power-flow control variables and time-of-use (TOU) tariff scheme. The optimization problem has been solved through the use of the linprog solver in the MATLAB’s optimization toolbox for a period of 192 h as a means of including week days and weekend days. The simulation results show that the developed model can assist the onsite MHK-PHS system to optimally reduce the electricity cost for the industrial load profile. An 86% grid cost saving has been achieved through the optimally managed MHK-PHS system.