Lithium Battery Pack for Utility-scale Energy Storage
The future of energy storage
There is an undeniable rise in the importance of energy storage with expected exponential growth over the next five years. The benefits of ESS are vast. They can smooth the delivery of variable or intermittent resources such as wind and solar by storing excess energy when the wind is blowing and the sun is shining and delivering it later when it is most needed. They can provide backup power during disruptions. Ultimately, ESS improve reliability and resilience, helping to integrate generation sources and helping to reduce environmental impacts.
Utility-scale battery storage systems will play a key role in facilitating the next stage of the energy transition by enabling greater shares of VRE.
For system operators, battery storage systems can provide grid services such as frequency response, regulation reserves and ramp rate control. It can also defer investments in peak generation and grid reinforcements. Utility-scale battery storage systems can enable greater penetration of variable renewable energy into the grid by storing the excess generation and by firming the renewable energy output.
Further, particularly when paired with renewable generators, batteries help providing reliable and cheaper electricity in isolated grids and to off-grid communities, which otherwise rely on expensive imported diesel for electric generation.
The growing share of VRE sources, such as solar and wind, calls for a more flexible energy system to ensure that the VRE sources are integrated in an efficient and reliable manner.
Battery storage systems are emerging as one of the potential solutions to increase system flexibility, due to their unique capability to quickly absorb, hold and then reinject electricity. According to the Energy Storage Association of North America, market applications are commonly differentiated as: in-front of the meter (FTM) or behind-the-meter (BTM). FTM batteries are connected to distribution or transmission networks or in connection with a generation asset.
They provide applications required by system operators, such as ancillary services or network load relief. BTM batteries are interconnected behind the utility meter of commercial, industrial or residential customers, primarily aiming at electricity bill savings through demand-side management (ESA, 2018). This brief focuses on how utility-scale stationary battery storage systems – also referred to as front-of-themeter, large-scale or grid-scale battery storage – can help effectively integrate VRE sources into the power system and increase their share in the energy mix.
Unlike conventional storage systems, such as pumped hydro storage, batteries have the advantage of geographical and sizing flexibility and can therefore be deployed closer to the location where the additional flexibility is needed and can be easily scaled. Deployment of pumped hydro storage, on the other hand, requires specific geological conditions (i.e. mountains and water). Utility-scale battery storage systems have a typical storage capacity ranging from around a few megawatt-hours (MWh) to hundreds of MWh.
Different battery storage technologies, such as lithium-ion (Li-ion), sodium sulphur and lead acid batteries, can be used for grid applications. However, in recent years, most of the market growth has been seen in Li-ion batteries. The increasing share of Liion technology in large-scale battery storage deployment, as opposed to other battery technologies, and the annual capacity additions for stationary battery storage. In 2017, Li-ion accounted for nearly 90% of large-scale battery storage additions (IEA, 2018).
Utility-scale battery storage systems are mostly being deployed in Australia, Germany, Japan, the United Kingdom, the United States and other European nations. Apart from these countries, several island and off-grid communities have invested in large-scale battery storage to balance the grid and store excess renewable energy. Energy storage deployments in emerging markets are expected to increase by over 40% year on year until 2025, resulting in approximately 80 GW of new storage capacity (IFC, 2017).
The JB BATTERY Utility-Scale Energy Storage is here again as leading industry practitioners share their strategies and experience on designing and engineering energy storage to harness renewable energy while achieving decarbonization and sustainability goals. In addition, understand the true value of a hybrid storage system and find the perfect balance to meet your capacity demands!
With the emergence and growing reliance on renewable energy sources as core administrators of energy and electricity, overburden by rapid decarbonizing energy systems and plummeting costs of wind, solar and nonhydroelectric technology, the race is on as electric utility scout for sustainable large scale utility energy storage, and at low cost. That said, many challenges still exist which include the technical, engineering, planning, maintenance, implementation, commercialization and project management aspects of utility scale energy storage.
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