Nowadays environmental concerns such as global warming and rise of fossil fuel prices have led to alterations in the configuration of power systems. New energy resources such as distributed generation (DGs), renewable energy resources (REs), and high-power batteries began to be connected to distribution grids. Electric vehicles (EVs) will charge their batteries at homes. The increasing electricity demand at home due to the increasing EVs charging load can overload and damage existing distribution grid or distribution transformer (DTR). The increasing of REs at DTR it will be reducing the utility's revenue it having to optimize the fuel cost. In this study, we focus on the optimization of the DTR load energy management system (TEMS) subject to constraints of DTR such as its loading, and cost from any sources. DTR is the utility’s transformer, call distribution transformer, to step down a medium voltage level into low voltage level suitable for connecting to customers, its install distributed in the utility distribution system. The DTR serves electrical energy to many customer loads. The optimization of DTR, the objective is to minimize the total cost, subject to base load and EVs home charger load. The total cost, including investment cost for new DTR, operation cost, maintenance cost, fuel cost, and revenue is optimized. The benefits of this study are, a cost-minimal investment and scheduling strategy for DTR and an optional stationary high-power batter, the customer can use the base load and the EVs home charger that they want at low cost. Finally, when the utilities using optimization and control algorithm at DTRs. The utilities will get benefits to connect from multiple sources, get more revenue, lower operation and maintenance cost, and less investment new DTR. The customer will satisfy the smarter distribution grid system that they can fully charge EVs at low cost at home.     «

Nowadays environmental concerns such as global warming and rise of fossil fuel prices have led to alterations in the configuration of power systems. New energy resources such as distributed generation (DGs), renewable energy resources (REs), and high-power batteries began to be connected to distribution grids. Electric vehicles (EVs) will charge their batteries at homes. The increasing electricity demand at home due to the increasing EVs charging load can overload and damage existing distributio...     »