What is a charge/discharge system?

While charge/discharge actions originate with higher level control decisions in battery management systems, energy management systems, or exogenous operator commands, it is the power electronic system that controls the real-time exchange of stored energy.

What is a power electronic conversion system?

Power electronic conversion systems are used to interface most energy storage resources with utility grids. While specific power conversion requirements vary between energy storage technologies, most require some form of energy conversion and control.

What is a fully discharged power supply (SoC)?

The amount of energy stored in a device as a percentage of its total energy capacity Fully discharged: SoC = 0% Fully charged: SoC = 100% Depth of discharge (DoD) The amount of energy that has been removed from a device as a percentage of the total energy capacity K. Webb ESE 471 6 Capacity

What is the difference between rated power capacity and storage duration?

Rated power capacity is the total possible instantaneous discharge capability (in kilowatts [kW] or megawatts [MW]) of the BESS, or the maximum rate of discharge that the BESS can achieve, starting from a fully charged state. Storage duration is the amount of time storage can discharge at its power capacity before depleting its energy capacity.

What is a battery energy storage system?

A battery energy storage system (BESS) is an electrochemical device that charges (or collects energy) from the grid or a power plant and then discharges that energy at a later time to provide electricity or other grid services when needed.

How will Power ratings affect energy storage?

As power ratings increase, it will eventually become necessary to move storage from the edges of the grid into distribution systems at MV and beyond. It is easy to envision a future in which energy storage systems are trusted utility assets tasked with grid support functions that directly affect system stability.