During periods of high demand, the National Grid aim to increase supply to maintain a 20% supply margin which is essential in eliminating, as far as possible, the risk of power shortages and blackouts, when there is an unexpected change in demand, or a sudden loss of supply.
Historically, conventional centralised power stations could be operated to fulfill this role. However, as the UK moves towards a more environmentally sustainable energy supply system, with an increase in renewable energy sources, there is an increased risk of electricity supply fluctuations, depending on prevailing weather conditions. Therefore, an increased need for facilities to store energy, in order to try and match the supply to the demand are required. Due to the technological advancements, one of the best solutions to address such a problem is deploying Battery Energy Storage Systems (BESS).
BESS do not emit Carbon Dioxide or generate electricity but provide a balancing mechanism drawing electricity (charging) when levels on the Network are above that of demand. When levels of electricity on the grid are below that of demand the electricity stored in the batteries can be fed back (discharged) onto the network to meet the demand so that there is no loss of power to end users.
BESS provides sub-second response times, so offer a reliable solution to a number of the Grid’s balancing issues thus supporting the development and deployment of low carbon intermittent energy technologies upon which society must increasingly rely on to satisfy its energy and environmental requirements.
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