Özet:

Many efforts recently have been dedicated to modelling the solar photovoltaic (PV) integrated with battery energy storage system (BESS) to provide detailed insight on techno-economic benefits. However, some of the models did not consider the operation of solar PV-BESS with incentives such as compensation schemes, different electricity tariff rates structures and BESS unit cost. Since 2011, Malaysia's grid-connected solar PV compensation schemes have changed several times. The comparative and empirical analysis of solar PV compensation scheme with electricity tariff is crucial to facilitate prosumers' stable cost allocation, especially when coupled with BESS. Therefore, this paper presents three different solar PV compensation scheme models to address the techno-economic value of adopting BESS at flat and dynamic tariff rate structures such as Enhanced-Time-of-Use (ETOU)) and real-time wholesale tariff. A university building that holds prosumer role and flat tariff is simulated with the presence of BESS using existing compensation scheme in Malaysia (i.e., self-consumption (SELCO), Net-Energy-Metering (NEM) 2.0 and NEM 3.0) for 25 years lifetime. The results showed that the BESS's fast response and dispatch ability characteristics assisted in peak shaving, which minimised the peak demand. Under the ETOU tariff, about 60% savings on electricity bills were recorded annually for solar PV-BESS installation compared to grid-only condition. The adoption of BESS in energy arbitrage had created economic value especially in ETOU tariff. It was also found that the levelized-cost-of-electricity (LCOE) is declining by increasing the BESS unit cost reduction percentage. <

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