Operating closely with NGT Frequency Service is the NGT Reserve Service. Participants include owners of small diesel (in the range 0.25-5MW) or open-cycle gas turbine generators (in the range of 25MW to 100MW) who are paid to start up and connect to the grid within 20 minutes at the same time as Frequency Service customers are called upon to disconnect. Participants must be reliable and able to stay connected and running for an hour or so. Substantial fees can be earned simply for making generating capacity available under complex contracts that specify levels of reliability, response times, frequency of use and so on.
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