2016 Volume 136 Issue 5 Pages 505-514
Large error of a day-ahead forecast of aggregated power output of photovoltaic power systems (PVS) can threaten power supply-demand balance in electric power system. When the forecast error is large, the power supply flexibility such as load-frequency control (LFC) resources would be exhausted to maintain supply-demand balance. Such a situation should be taken into account in an impact assessment of a day-ahead forecast error by using UC-EDC simulation model. Based on the availability of several minutes interval data of electricity demand and spatial average irradiance, this study proposes a UC-EDC simulation model including constraints on actually required LFC resources. As a result, because power supply resources can be used as much as possible for supply-demand balancing, electricity supply shortage and surplus are smaller than those in a conventional simulation model including constraints on fixed amount of LFC resources regardless of the real fluctuation levels.
The transactions of the Institute of Electrical Engineers of Japan.B
The Journal of the Institute of Electrical Engineers of Japan