Frequency stability in electricity networks is essential to the maintenance of supply quality and security. This paper investigates whether a degree of built-in frequency stability could be provided by incorporating dynamic demand control into certain consumer appliances. Such devices would monitor system frequency (a universally available indicator of supply-demand imbalance) and switch the appliance on or off accordingly, striking a compromise between the needs of the appliance and the grid. A simplified computer model of a power grid was created incorporating aggregate generator inertia, governor action and load-frequency dependence plus refrigerators with dynamic demand controllers. Simulation modelling studies were carried out to investigate the system's response to a sudden loss of generation, and to fluctuating wind power. The studies indicated a significant delay in frequency-fall and a reduced dependence on rapidly deployable backup generation.
- electricity networks
- electricity supply
- consumer electricity supply
- electricity supply stability
Short, J. A., Infield, D. G., & Freris, L. L. (2007). Stabilization of grid frequency through dynamic demand control. IEEE Transactions on Power Systems, 22(3), 1284-1293. https://doi.org/10.1109/TPWRS.2007.901489