Battery storage on Hanoi's grid
Unlike conventional uninterruptible power supplies (UPS), battery energy storage systems (BESS) are large-scale energy storage systems connected directly to the power grid. These systems can charge and store electricity at appropriate times and feed it back into the grid when needed. BESS can be understood as bidirectional electricity storage facilities. When conditions in the system fluctuate, electricity flows from the grid into storage; when support is needed, the systems supply electricity back to the grid. In this way, BESS can help flatten load curves, reduce the load burden during peak hours and increase flexibility in power system operations.
With electricity demand rising and loads varying significantly with weather and time of day, improving the operational efficiency of Hanoi's power system requires not only investment in generation and the grid but also the introduction of new technological solutions. Anticipating developments in energy storage technology, EVNHANOI has completed installation, commissioning and trial operation of five battery energy storage systems at the Bac Thang Long, Quang Minh, Sai Dong 2, Phung Xa and Thanh Oai 110 kV substations. Each system has a capacity of 10 MW/20 MWh, for a total of 50 MW/100 MWh. This is the first application of large-scale energy storage technology on Hanoi's power grid, marking progress in modernizing power infrastructure and developing a smart grid.
Hanoi Power Corporation employees inspect the battery energy storage system at the Sai Dong 2 110 kV substation.
Substations for the pilot project were selected based on the load characteristics and operational requirements of Hanoi's grid. Battery energy storage systems are an entirely new technology for the grid. From installation, testing and commissioning through to official operation, EVNHANOI's departments worked closely together to ensure that the systems fully met technical requirements and could operate reliably and safely. During operation, technical personnel continuously monitored battery condition, charging and discharging capacity, temperature, protection systems and technical alerts. Each inspection shift followed strict procedures, with close coordination among switchboard personnel, the technical management department and on-site substation personnel to keep all parameters within safe limits. Through this practical operating experience, EVNHANOI was able to accumulate data, improve technical procedures, assess equipment reliability and gain management experience with a technology that is still very new in Vietnam.
Operational experience and future evaluation
According to Pham Huu Man, deputy head of the Hanoi Power Development Project Management Board, the introduction of battery energy storage systems is not intended to replace existing generation sources. Instead, it adds a technical tool to help the power system respond more proactively to load fluctuations, while establishing a basis for research into future models of modern grid operation. When combined with data acquisition, monitoring, control and energy management systems, grid automation and digital technology, BESS becomes more than an energy storage system and serves as an important component of smart grid architecture.
EVNHANOI will continue to monitor and evaluate operational efficiency, improve technical procedures and study appropriate applications. This will provide a basis for meeting socioeconomic development needs and delivering higher-quality electricity to Hanoi residents, while gradually building a smarter, more flexible, safer and more modern grid for the capital.
https://www.qdnd.vn/kinh-te/cac-van-de/bess-mat-xich-moi-trong-luoi-dien-thong-minh-thu-do-1063840
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Original Korean article: vietnam.vn
English brief by Korea Wind Intelligence, koreawindintel.com
