What is Energy Management System (EMS) in a microgrid control strategy?

In a microgrid control strategy, an energy management system (EMS) is the key component to maintain the balance between energy resources (CG, DG, ESS, and EVs) and loads available while contributing the profit to utility. This article classifies the methodologies used for EMS based on the structure, control, and technique used.

What are the objectives of EMS in microgrid operation?

Optimization in cost minimization, operation control, reliability, energy scheduling, emission control, and load forecasting is the objective functions of the EMS in both the modes of microgrid operation for sustainable development.

How different is a microgrid energy management scheme from a conventional power system?

Depending on the characteristics and penetration of distributed energy resources (DERs) and DES nodes within a particular microgrid, the desired energy management scheme can be significantly different from a conventional power system.

What is the difference between Des and microgrid-level EMS?

The detailed operations on DES are performed by the embedded local regulators within DES while the microgrid-level EMS will control when to dispatch the stored energy and how much. The overall energy management objective for DES varies depending on the microgrid operational modes.

What is an example of an EMS in a decentralized microgrid?

For example, an EMS in a decentralized microgrid exchanges energy price information with the DNO and MO and is able to take over the control of the local regulator from the system level in the event of serious contingencies and equipment failure.

What are the objectives of microgrid energy management?

The microgrid energy management objectives depend on its mode of operation, whether it is centralized, decentralized, or distributed operation, several economical constraints, and the dynamic nature of dispatchable energy sources.