This paper highlights lessons from Mongolia on how to design a grid-connected battery energy storage system (BESS) to help accommodate variable renewable energy outputs. Contact online >>
This paper highlights lessons from Mongolia on how to design a grid-connected battery energy storage system (BESS) to help accommodate variable renewable energy outputs.
The paper suggests how developing countries can address technical design challenges, such as determining storage-capacity size, and regulatory issues to do with ownership, safety, sustainability, and commercial viability. It aims to help governments accelerate BESS solutions and expedite progress toward carbon-neutral societies.
The Asian Development Bank (ADB) is committed to achieving a prosperous, inclusive, resilient, and sustainable Asia and the Pacific, while sustaining its efforts to eradicate extreme poverty. It assists its members and partners by providing loans, technical assistance, grants, and equity investments to promote social and economic development.
[ZTT BESS Mongolia] On Tuesday, May 30ᵗʰ, 2023, ZTT New Energy successfully delivered its BESS containers to Mongolia’s first Utility-scale energy storage project.
Project Background
As predicted before, on successful completion, the project will supply 58.5 gigawatt-hours of clean peaking power annually. And support the integration of an additional 859 gigawatt-hours of renewable electricity into the CES grid annually. Thereby avoiding 842,039 tons of carbon dioxide emissions yearly by 2025.
ZTT BESS used in this project adopts the design of a 40HC high-cabin container (excluding air-conditioning), which is a weight of 45 tons, and a single-cabin capacity of 3.634MWh. In addition, the system has a 1500V voltage platform of an ingress design, an IP54 protection level, and a C3 protection level.
ZTT BESS Commitments
ZTT New Energy is a completed solution provider (from proposals to products and systems) of BESS and Solar PV, which enables us to have great control over the whole process, ensure the best quality, and make sure we can adapt to customers’ special requirements.
With dedicated account management and order follow-up, our ability to respect the production lead time, and our transparency about the quality and raw material we used to produce, ZTT New Energy always support customers with specific certificates according to their requirements.
About ZTT New Energy
ZTT started on Optical Fiber Communications in 1992, accessed Smart Grid in 2002, and commenced work on the Renewable Energy field in 2012. With over 30 years of sustainable innovation, ZTT helps make a wide variety of products across industries. Ever since it first started developing the Lithium-ion battery and BESS, ZTT has expanded a new era of focusing on power delivery and energy storage optimization.
Insist on technological innovation and respond to green double carbon. ZTT New Energy will continue to move forward with the industry and witness the development and future of energy storage.
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Sodium-sulfur (NAS) batteries made by Japanese industrial ceramics company NGK Insulators will be used at a solar PV plant in Mongolia, in a project that will receive funding and loans based on its use of low carbon technologies.
NGK will supply a 600kW / 3,600kWh NAS battery energy storage system to the project which is in Uliastai, in Mongolia’s western Zavkhan Province. It is part of a wider initiative to increase the use of renewable energy in Mongolia, which is heavily dependent on coal — for instance around 93% of total power demand in the Central Energy System, which serves major load centres including the capital Ulaanbaatar, comes from a fleet of ageing combined heat and power coal power plants.
While the new project will be sited in a separate energy system area, Altai-Uliastain, in the country overallthe energy sector is responsible for about two-thirds of national greenhouse gas (GHG) emissions and severe air pollution causes health problems for its citizens including respiratory disease.
NGK’s NAS batteries can provide long-duration energy storage with a large capacity and have already been used in 600MW / 4,200MWh of projects worldwide. They can store and discharge for six hours at rated output and between 14-18 hours at one-third of rated output, have an expected lifetime of around 15 years, or 4,500 cycles. The battery technology, of which NGK is the only manufacturer, was among a number of long-duration non-lithium-ion technologies profiled in an article for this site and the quarterly journal PV Tech Power in early 2020.
The battery houses sulfur in the positive electrode and sodium in the negative electrode, using a special ceramic component as electrolyte. Operating at a high temperature, it can be used in both warm and cold environments. The main applications it is used for include load-levelling, adjusting supply and demand imbalances on grids, stabilising renewable energy integration as well as offering backup power. In September last year, chemicals company BASF said it would use the technology to support green hydrogen production from wind power, while more recently the tech provider was picked out to supply systems to arocket and space vehicle launch station of the Japan Aerospace Exploration Agency (JAXA) to support the stable operation of electric power systems.
The Uliastai project is Mongolia's first large-scale solar-plus-battery storage project. Itwill be delivered to the Ministry of Energy of Mongolia and funded through a loan from the Asian Development Bank (ADB) as well as by the Japan Fund for the Joint Crediting Mechanism (JCM), a programme hosted by the ADB and created by Japan’s government Ministry of the Environment. NGK will work with Japanese engineering, procurement and construction (EPC) partner JGC Corporation as well as local energy sector player MCS International. The project’s scheduled completion date is Spring 2022.
The battery storage system will be paired with a grid-scale solar PV plant, and the project is part of the ADB’s Upscaling Renewable Energy Sector initiative for Mongolia, through which around 40MW of wind and solar power plants are being built.
The Asian Development Bank is also helping to progress a large-scale standalone battery energy storage system in Mongolia with 125MW rated output and 160MWh in Ulaanbaatar, which would help to fully utilise renewable energy capacity, reduce energy imports and dependence on coal generation and help develop regulations for providing ancillary services to keep the nation’s power systems operating stably as renewable energy capacity increases.
Mongolia is targeting the reduction of GHG emissions by 7.3 mtCO2 by 2030, and renewable energy’s share of total installed capacity reaching 30% by that time. This constitutes about 593.5MW of renewable energy capacity increase over 10 years. According to figures from the Asian Development Bank, Mongolia’s combined solar and wind potential is an estimated 2,600GW of installed capacity. That would meet national energy demand which stood at about 1.2GW in 2018 as well as being enough for the country to become an energy exporter to northeast Asia.
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