Transient response of a localised demand control system

Electricity systems worldwide are experiencing significant change with a large push towards renewable energy generation and an intelligent grid. Increased renewables also increases forecast uncertainty and in turn makes system frequency regulation more difficult. The addition of electric vehicles (EVs) may cause further issues by increasing the evening peak and increasing distribution transformer loading. A Demand Side Management system for managing load on individual distribution transformers has previously been created. EVs and a number of typical household loads can be time shifted with little impact on the end user. In this manner these loads can become highly beneficial to the grid by being moved out of peak demand periods and controlled in response to fluctuations in supply. Additional frequency monitoring functionality has now been added to the system and the frequency keeping performance has been quantified. Initial results suggest the system has good frequency keeping capabilities and could contribute significantly to system stability if deployed on a wide scale, while still managing local distribution constraints.