Performance Assessment of Building Integrated Photovoltaic and Battery Energy System: A Case Study of TERI-Retreat Facilty in India

Building integrated photovoltaic (BIPV) with energy storage can play an important role not only in demand side management but also in a micro-grid system in coordination with other distributed generators. The operational analysis of BIPV system and energy storage with contribution to local load profile is needed for its grid connected operation, as well as for integrating it in the micro-grid system. In this work, a typical institution has been selected, where the PV system and energy storage are operated for supplying local load in coordination with the grid. The institutional load profile has been analyzed with essential and non-essential loads for understanding the operation and contributions from the PV and battery energy storage in addition from the grid. Annual institutional load variations and PV system outputs are analyzed for evaluating the installed battery's energy throughput and energy contents. Two typical scenarios, with worst and best cases, are used for performance assessment of the considered energy system. It is observed that essential loads are fulfilled during the grid outage through batteries, but load reliability has significant impact if the grid outage is longer. It is noticed that the battery energy throughput must be maximized for effective PV output utilization to fulfil local demand. Results from this work are going to contribute for developing an institutional micro-grid with appropriate sizing of distributed generator as well as on demand side management with grid constraints.