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What is State of charge (SOC)

Handbook of Research on New Solutions and Technologies in Electrical Distribution Networks
It is the level of charge of an electric battery relative to its capacity.
Published in Chapter:
Energy Storage System and Its Power Electronic Interface
Baseem Khan (Hawassa University, Hawassa, Ethiopia), Samuel Degarege (Hawassa University, Hawassa, Ethiopia), Fsaha Mebrahtu (Hawassa University, Hawassa, Ethiopia), and Hassan Alhelou (Tisheen University, Syria)
DOI: 10.4018/978-1-7998-1230-2.ch016
Abstract
This chapter examines the modeling and simulation of energy storage (battery, flywheel, etc.) systems interfaced to the power grid by using power electronic device, like chopper module, Rectifier module, and filter circuits, which are essential to the load balance between supply and demand, and to eliminate harmonics and to ensure efficient, cost effective, and reliable operations. Energy storage system in power grid is the same as memory in computer system. Energy efficiency is a key performance indicator for energy storage system. The energy storage system is the most promising component to enhance the system reliability and flexibility.
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