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quency regulation services. However, modern power systems with high penetration levels of generation. Therefore, de-loading of renewable energy generations to provide frequency reg- ulation is not technically and economically viable. As such, energy storage systems, which support are the most suitable candidate to address these problems.
It is worth mentioning that BESS is presently dominant for frequency and diversity of materials used [1, 10, 11]. Among diferent battery chemistries, lithium-ion that outnumber their limitations [1, 11]. seconds [12, 13]. Hence, PFR services require continuous power for a relatively long period of time .
MW. PFR is provided by BESS with a SOC of 0.2 (Figure 5.7(a)) and 0.8 (5.7(b)), respectively. frequency rise has improved by 0.046 Hz compared with the fixed droop method.
grid frequency and is the nominal grid frequency. With the change in the SOC of batteries, and vary between 0 and Kmax. The relationship between power-frequency for charging/discharging is given in (3.1), (3.2) and (3.3) . Figure 3.1: Droop characteristics of the BESS.
In the end, a control framework for large-scale battery energy storage systems jointly with thermal power units to participate in system frequency regulation is constructed, and the proposed frequency regulation strategy is studied and analyzed in the EPRI-36 node model.
Since the battery energy storage does not participate in the system frequency regulation directly, the task of frequency regulation of conventional thermal power units is aggravated, which weakens the ability of system frequency regulation.
The battery energy storage system (BESS) is a better option for enhancing the system frequency stability. This research suggests an improved frequency regulation scheme of the BESS to suppress the maximum frequency deviation and improve the maximum rate of change of the system frequency and the system frequency of the steady state.
The results of the study show that the proposed battery frequency regulation control strategies can quickly respond to system frequency changes at the beginning of grid system frequency fluctuations, which improves the stability of the new power system frequency including battery energy storage.
The most recent update regarding BESS installations is that in Tume and Rēzekne, Latvia’s transmission system operator “Augstsprieguma tīkli” (AST) in June 2025 installed battery energy storage systems with a combined capacity of 80 MW and 160 MWh, which will undergo testing until October 2025.
Latvia’s Recovery and Resilience Plan plays a key role in the energy transition, supporting economic recovery through major investments in renewables like wind, solar, and biomass, as well as initiatives such as a 60 MW Battery Energy Storage System by 2026 and cross-border projects to synchronize with Continental Europe .
Latvia’s Energy Strategy 2050 outlines major changes in renewable energy production and storage, with significant investments planned in wind, solar, biomass, and biogas, as well as in energy storage technologies like batteries and subsurface systems to ensure supply stability .
Local authorities are responsible for municipal energy supply and renewable energy projects, with Latvia’s energy transition guided by the National Energy and Climate Plan and the Energy Strategy 2050.
The project will be completed mid-2026 when the Government of Niue under the Department of Utilities and Niue Power Corporation (NPC) will take over the ownership. We anticipate savings of 816,000 litres of fuel and 2,202 tCO2e in year one. It will support Niue to deliver on our climate goals and Nationally Determined Contributions (NDCs).
In addition to Australia’s support, the New Zealand Government contributed $2.5 million to relocate and restore Niue’s Battery Energy Storage System (BESS). This funding has allowed the Ministry to repair the grid control system, procure necessary fuel tanks, and install cabling and connections.
The Minister of Infrastructure, Hon. Crossley Tatui extended his appreciation to the Australian and New Zealand Governments, saying, “The construction of this new power station is a vital piece of infrastructure for Niue’s development and well-being. This achievement would not have been possible without the support of our regional partners.”
The Ministry of Infrastructure celebrated the so5 launch of Niue’s New Power Sta;on on the 7th November 2024. The launch marks a cri;cal milestone in Niue’s journey to strengthen and modernize its energy infrastructure.
The Southern Thailand Wind Power and Battery Energy Storage Project, funded by the Asian Development Bank (ADB) in 2020, was the first private sector initiative to support the development of 10 MW utility-scale wind power generation with an integrated 1.88 MWh BESS in Thailand.
In July 2022, the China Energy Construction Corporation began construction of the first solar thermal storage demonstration project in Xinjiang Uygur Autonomous Region of China, with 10 MW of thermal storage and 90 MW of solar power. In particular, China showcased its climate leadership in the 2022 Winter Olympics in Beijing.
Energy storage allows for the increased use of wind and solar power, which can not only increase access to power in developing countries, but also increase the resilience of energy systems, improve grid reliability, stability, and power quality, essential to promoting the productive uses of energy.
This implies a major shift in energy storage investors to state-owned enterprises (SOEs) from power grid companies such as China Energy, Huaneng, Huadian, and State Power Investment Corporation (SPIC) .
