Belectric’s ‘Energy Buffer Unit’ provides balancing service to grids with high renewable energy

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Belectric’s Energy Buffer Unit (EBU) has been successfully prequalified for 1.3MW frequency response by a German transmission network operator (TNO) that provides frequency response balancing for reliable grid operation when taking into account large quantities of renewable energy being connected to grid. Belectric’s EBU system delivers a state-of-the-art battery based energy storage system in a container solution.

Problem

With increased adoption of renewable energy, grid operators have to better manage fluctuations in the transmission network. Large-scale battery storage improves the safety of transmission network operation, even during heavy fluctuations like a generator or interconnector trip. 

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Solution

Belectric’s EBU system can be prequalified for frequency response on the German transmission network with up to 650kW, taking into account reserve capacity required by the German TNOs. The advanced lead-acid batteries were developed for a long service life and high cycling stability for high performance applications. EBU system standardization enabled Belectric to offer a cost-effective utility scale energy storage system. Services from the EBU will be offered on the frequency response market on a weekly basis. Due to rising prices in this market over the last three years, attractive business models are now appearing for the use of energy storage.

Applications

Energy Buffer Unit is for frequency response and other cyclic grid applications.

Platform

The EBU is shipped with power inverter and medium voltage transformer and features a nameplate power between 800kW and 1400kW, depending on configuration. It has a storage capacity of 948 kWh and is available starting at €560,000. BELECTRIC UK is also collaborating with UK’s National Grid to demonstrate frequency and voltage stability of distribution networks — protecting the UK from power blackouts and instability — and so reduce the grid’s reliance on spinning reserve. The Enhanced Frequency Control Capability (EFCC) project is using grid monitoring and control system that identify potential problems as they arise and uses the EBU unit and management technology to rectify them.

Availability

May 2015 onwards. 

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