Energy storage systems for ancillary services

What are long-term ancillary services?

The long-term ancillary services are reviewed for peak shaving, congestion relief, and power smoothing. Reviewing short-term ancillary services provides renewable energy operators and researchers with a vast range of recent BESS-based methodologies for fast response services to distribution grids.

What are ancillary services?

The review is divided into short-term and long-term ancillary services. The short-term ancillary services for future distribution grids are reviewed for voltage control, frequency regulation, and black start. Long-term ancillary services are for congestion management, peak shaving, and power smoothing.

Do ancillary services improve the efficiency of transmission and distribution grids?

BESS in transmission and distribution grids are operated over a long period for ancillary support to improve the system’s efficiency and reduce the costs of producing and delivering electricity Mexis and Todeschini  (2020). Congestion relief, peak shaving, and power smoothing are reviewed for long-term ancillary services in this paper.

Do large-scale power plants provide ancillary services?

Large-scale power plants are traditionally used to provide ancillary services to maintain stable operation of the distribution networks Islam et al.  (2017b); Prakash et al.  (2020); Islam et al.  (2017a). However, the recent increase in renewable energy sources (RESs) has affected the operational schemes of the power grids.

Why do ancillary services use balancing capacity?

In many ancillary service markets, balancing capacity and balancing energy are jointly procured. Balancing capacity gives TSOs the possibility of activating a certain amount of balancing energy in real time.

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.