free html templates

Scenario 1

The proposed hybrid combination model

5 MW PV + 1 MWh lithium ion battery hybrid system

The Isle of Cumbrae already has a approval from the government to install the 5MW PV and 5MW inverter combination with a 1MWh lithium-ion battery hybrid system. Hence, in our first scenario, we established the same combination. Later, we analysed the effectiveness of this hybrid combination in Cumbrae. The result is evaluated in terms of the renewable fraction, decrease in Cost of electricity(COE), and % of CO2 emission reduction. We find out the performance of this combination by compared with the current situation. As per our analysis, the current COE is estimated as 9.88 pence/kWh, and current CO2 emission is calculated as 6000 tonnes/year. Also, currently the Cumbrae doesn't have any renewable generation, hence, the renewable fraction is zero. To know more about our baseline values, please click here.  

We have used 'HOMER Pro' software to design this combination. The circuit diagram that we developed to calculate the output from the proposed Hybrid combination model is given in figure 1.                                                    

Mobirise

To know more about the circuit components please click on the respective buttons:

Load PV & Inverter Grid Battery Generator

Results

As a result of the above simulation model, the renewable fraction is increased to         39.6 % from the current 0% at the Cumbrae. Also, the COE is decreased to 9.44 pence/kWh from 9.88 pence/kWh. Moreover, the CO2 emission is decreased by           28.3 % compared with the current situation in the island. These results are highlighted in figure 2.  

Mobirise

Typical Periods in a year

Mobirise


Figure 3 shows the typical period on a summer day. Here, we used PV as the renewable generating source. During the summer periods as the sunlight is high (therefore, high solar horizontal irradiance), the generation from the photovoltaic is high. Hence, we got higher peaks during this period. So, the periods of deficit energy during the summer season are less. As a result, comparatively lesser grid purchase to meet the demand during the summer period.

Mobirise



Figure 4 shows the typical period on a winter day. In contrast to the summer periods, as the sun output is less, we got lower peaks during the winter period. Hence, the frequency of deficit energy periods is high. So, in order to meet with demand, the energy is purchased from the central period more often.


In total, the overall percentage of grid sales, grid purchase, and PV outputs for a year is given below:

Grid sales : 15.8%
Grid purchase: 59.2 %
PV output: 40.8 %

Address

Department of Mechanical & Aerospace Engineering,  James Weir Building, Level 8,  
75 Montrose Street
Glasgow G1 1XJ
Scotland, UK




Reach us at : 

Contact us