Intelligent Hybrid Energy Resource Connected Demand Side Load Management System-Case of Pakistan

Pakistan’s power system is currently facing serious energy crisis issues as the supply of electric power is not increasing at the pace of its demand. Although conventional power system is experiencing a notable transition from the centralized supply-side energy management system to decentralized generation and demand-side load management system certainly due to the integration of hybrid energy systems to the local grids yet the shortfall in supply and energy demand gap resulted into large scale electric load-shading problem in all cities of Pakistan from last few years. This paper discusses a real-time load management system integrated with a hybrid energy system as a source i.e. grid-tied photovoltaic (PV) system, stand-alone PV system, wind-turbine, local grid and aims to have a customer control overload appliances in peak and off-peak hours, update them for hourly units consumption and also shed the unnecessary loads according to user-set priority and demand. The hybrid energy system and load end is interconnected to the programmable logic controller (PLC) and are also controlled by using PLC. According to the specified site and load demand discussed in the paper, it has been found that by implementing the proposed load management system approach average of 82 units of electricity can be saved in peak hours, and similarly the average amount of 4.875 Rs/KWh can also be saved for specified time dictating that proposed smart strategy can prove to be fruitful to combat electric load problem on large scale in Pakistan in future.