How do energy management systems work?

Coordination of multiple grid energy storage systems that vary in size and technology while interfacing with markets, utilities, and customers (see Figure 1) Therefore, energy management systems (EMSs) are often used to monitor and optimally control each energy storage system, as well as to interoperate multiple energy storage systems.

What are the different types of energy storage applications?

Energy storage applications can typically be divided into short- and long-duration. In short-duration (or power) applications, large amounts of power are often charged or discharged from an energy storage system on a very fast time scale to support the real-time control of the grid.

What is energy management system architecture?

Energy Management System Architecture Overview Figure 1 shows a typical energy management architecture where the global/central EMS manages multiple energy storage systems (ESSs), while interfacing with the markets, utilities, and customers .

What are the components of a local EMS?

Just as an ESS includes many subsystems such as a storage device and a power conversion system (PCS), so too a local EMS has multiple components: a device management system (DMS), PCS control, and a communication system (see Figure 2). In this hierarchical architecture, operating data go from the bottom to the top while commands go top to bottom.

What are the requirements for a communication interface of an ESS?

Fundamental requirements for a communication interface of an ESS can be found in existing standards such as IEC 61850-7-420 and Modular Energy System Architecture (MESA) (see Figure 5). Commercial systems often follow standardized communication protocols.

What is a highly centralized energy management system architecture?

In a highly centralized architecture, the optimal dispatches (i.e., power commands) are calculated at the control center and sent to each local EMS. In a highly decentralized architecture, the central EMS may not exist, therefore, EMS functions are only performed at the local EMSs. Figure 2. Energy Management System Hierarchy Architecture 1.2.