BESS
KNOWLEDGE & FAQ

Introduction

Energy storage systems are becoming increasingly important as more renewable energy sources, such as wind and solar, are connected to the grid. Younicos’s battery solutions enable a greater share of renewable energy, while ensuring grid stability and resilience.

What are battery energy storage systems?

A battery energy storage system (BESS) is a system that stores chemical energy through a battery technology and converts that stored energy into electrical energy for use at a later time. A BESS consists of two main parts: 1. a bank of batteries and 2. a power conversion system used to connect the batteries to the grid. The batteries may come in a variety of available chemistries, with lithium-ion being a popular choice for utility-scale applications.

 

What do battery energy storage systems do?

Battery energy storage systems play an important role in integrating renewable energy deployment. They are used to store energy from renewable energy sources, such as solar or wind, for use at another time. Battery energy storage systems provide important services to the grid, such as frequency regulation and backup power. They are incorporated in microgrids to provide a supportive source of power and add resilience and flexibility.

What are the benefits of battery energy storage systems?

Battery-based energy storage systems offer many advantages in transportability and size. Their design and construction have helped manufacturers improve both the system’s efficiency and lifespan. There are many benefits of a battery energy storage system, which include: frequency regulation, backup power, grid stabilization, ramp rate control, black start and other aspects that address power quality and storage.

A real battery energy storage system example

Duke Energy is using Younicos control technology to manage operations for a 36 MW battery energy storage system (BESS) at the site of the utility’s 153 MW Notrees wind farm in West Texas. The Notrees BESS, funded in part by a U.S. Department of Energy Smart Grid award, was initially constructed by Duke Energy in 2012, and remains the largest wind-integrated storage resource in North America. The integrated facility at Notrees has been providing environmentally friendly and flexible capacity to the Electric Reliability Council of Texas (ERCOT), which operates the grid and manages about 75% of the deregulated market in the state. The BESS is in a 20,000-square-foot building adjacent to the wind farm substation. It is tied in at distribution-level to the wind farm’s 34.5kV system and connects to the ERCOT grid through the same point of interconnect as the wind farm.

How can battery energy storage systems be used?

Battery energy storage systems can be used in a variety of ways. Most importantly, they are used to manage a power supply in order to create resilience and bring cost-saving benefits to utilities and customers.

 

FAQ’s

What are the components of a battery storage system?

A battery storage system consists of two main components: a bank of batteries and a power conversion system used to connect the batteries to the grid. Younicos has designed and manufactures an energy storage system that is a key building block for small or grid-scale applications. The Y.Cube is a ready-to-install storage system, with all components inside a single enclosure. This off-the-shelf solution comprises batteries, inverter, HVAC and auxiliary components, all tested and pre-assembled by Younicos experts, and seamlessly operated by Younicos’s Y.Q operating system

Why is energy storage important?

Energy storage plays an important role in creating a more flexible and reliable grid. Excess energy can be stored in a battery energy storage system when supply is greater than demand, such as during the night. This ensures a secure and reliable electricity supply – 24 hours a day.

What is peak shaving?

Peak shaving, a key benefit of battery energy storage systems, is a technique used to lower electric power consumption when there is maximum demand on the power utility, ultimately saving money by avoiding peaking changes.

Is storage a crucial part of a microgrid?

Yes, energy storage serves as a supportive source of power for microgrids and provides other critical system functions including peak shaving, smoothing power flow, islanding and more.

How do battery energy storage systems work with sources of renewable energy?

A source of renewable energy, such as wind turbine or solar, generates electric power from the source and provides that power to the grid. When an excess of energy is produced, it can be kept in a battery energy storage system.

How do battery energy storage systems work with the grid?

During off-peak hours, such as when there’s no sunlight, the energy that is in the battery energy storage system is redistributed to the grid. This way, there is no waste of energy and the overall efficiency of the system is increased.

 

 

GET IN TOUCH!

If you have any questions or need further information, feel free to contact us. We look forward to hearing from you.

EUROPE

 

berlin@younicos.com
Call: +49 30 818 79 9010

 

Younicos GmbH
Am Studio 16,
12489 Berlin
Germany

NORTH AMERICA

 

austin@younicos.com
Call: +1 512 268 8191

 

Younicos Inc.
3100 Alvin DeVane Blvd
Austin, Texas 78741
USA