Availability of CHPs to provide primary frequency response in the great Britain power system

The reduction of total system inertia increases the system requirements for Primary Frequency Response (PFR). To mitigate this issue, future power system frequency stability requires response from not only the generation side, as has been the traditional method, but also from the consumer side through the use of flexible technology currently being developed. This paper investigates the availability of domestic combined heat and power (CHP) systems to provide primary frequency response in the poser system of Great Britain. This is achieved by setting a rate of change of frequency (ROCOF) as a trigger for CHP systems to provide PFR at different levels of response. The results show that domestic CHP could increase system frequency stability by providing additional PFR against frequency drops, with minimal adverse impact on the customers.