Comparison of Market Operation Strategies for Photovoltaic Power Plants with Storage Systems Providing Frequency Ancillary Services

This paper proposes an energy storage management with an advanced and optimized market participation methodology for Day-Ahead Market (DM), Intraday Market (IM) and Secondary Reserve Market (SRM), with the aim of defining the optimal trade-off between the profits and the fulfilment of SRM requirements. This paper aims to demonstrate their potential to participate not only in energy markets, but also in frequency ancillary services in order to contribute to the grid stability, as well as being an additional source of revenues. The suitable market strategy must ensure an optimal and reliable operation despite the uncertainty of solar generation, the uncertain real-time CRR signal and the limited capacity of the energy storage system.