Integration of batteries in PV plants
High penetration of PV power into the electrical networks leads Transmission System Operators to establish some restricting norms to assure the stability of the grid, such as power ramp rate limitation or frequency regulation. These norms oblige PV promoters to integrate batteries in the PV plants to fulfil them. Although the state of the art of batteries is evolving very fast, their high cost pushes to research on optimal solutions looking for feasibility.
Our research group has a long trajectory analyzing the battery requirements for PV power ramp rate limitation. The first step was to characterize PV power fluctuations, depending on the size and distribution of PV plants, recording 1-second PV power data from a wide set of operational PV plants. This allows us to establish a method to size the battery able to absorb every PV power fluctuations to fulfill a certain ramp rate.
Nowadays, we are researching on methods to reduce the battery size without impact in the fulfillment of regulations but reducing dramatically the system cost.
Contact person: Prof. Eduardo Lorenzo