How to assess Bess degradation in a micro-grid?

To assess BESS degradation, an economic dispatch is carried out, which incorporates the use of a BESS inside a micro-grid. The economic dispatch is formulated as a MILP optimization problem that allows the BESS to supply the electricity demand during an eighthour period of energy autonomy per day.

What is the yearly degradation rate of Bess?

The yearly degradation rate for this case is calculated to be 3.80%. The degradation rates vary from 3.80 to 2.33% per year for every 10% increment in the BESS size from the base case. Performing a techno-economic analysis reveals that the least energy generation cost is achieved when increasing the BESS size by 20%.

What is the degradation cost function of a Bess?

The degradation cost function of a BESS can be derived from its lifetime energy throughput , number of cycles and the cost of the battery packs. First, a degradation cost coefficient, ($/MWh), is defined as follows.

What causes battery degradation in Bess optimization?

It is evident that the perspective of battery degradation in BESS optimization is getting deeper. Its factors vary, such as energy capacity fading, calendar, and cycling aging, battery lifetime, cycle battery, and temperature.

How is Bess degradation determined?

Since BESS degradation is a consequence of how the battery cells are operated (e.g.; initial and final state-of-charge (SOC) values within each cycle), we propose the use of a technique capable of estimating an equivalent degradation factor regardless of their operation.

Does Bess sizing affect energy generation cost?

This increases BESS life from 5.3 years to 7.3 years and reduces the generation cost from 35.19 ₹ kWh−1 (0.482 $ kWh −1) to 34.34 ₹ kWh −1 (0.470 $ kWh −1 ). These results provide essential insights to analyse the impact of BESS sizing on degradation and energy generation cost in a standalone PV–wind battery hybrid power system framework.