Energy Storage Units

Energy storage systems (ESSs) have been demonstrated to be useful assets to utilities and to others that generate, supply, or utilize electricity. Utilities, for example, have historically relied upon spinning reserves, occasionally provided by a neighboring utility, as a quickly available source of electric power to cope with a host of power-line anomalies.

Distributed generation (DG) is getting more attention in recent years. This is mainly due to the various advantages of DGs, such as an electrical energy loss reduction in the distribution system, reduction of voltage fluctuations, increasing reliability, power quality improvement, energy cost reduction, and ultimately increasing customer satisfaction.

DGs may include different forms of electrical energy generation; renewable resources, mainly wind and solar power plants, or nonrenewable resources (conventional methods). Employing most of the renewable energy resources, such as wind farms and photovoltaic (PV) systems as DGs leads to the main challenges: changeability and uncontrollability of output power. Indeed, these main features lead to additional fears in DGs application in a power system. Using an Energy Storage System (ESS) is proposed and is one of the most appropriate solutions in this area. This new category enables engineers to manage the power system optimally.

Generally, the ESS operation is categorized as follows:

A variety of ESSs can be provided in terms of technology, location, capacity, demand, and costs of investment.

Energy storage systems (ESSs) have been demonstrated to be useful assets to utilities and to others that generate, supply, or utilize electricity. Utilities, for example, have historically relied upon spinning reserves, occasionally provided by a neighboring utility, as a quickly available source of electric power to cope with a host of power-line anomalies.
Battery energy storage systems are also utilized as uninterruptible power supplies to support relatively isolated utility lines as well as dedicated loads.
Other applications include storing energy from renewable, intermittent resources such as photovoltaics, wind-driven generators, and small hydro facilities. In these applications, the BESS provides an advantageous disconnect between resource availability and exploitation of the renewable energy.