Loss calculations

Loss Mode

With losses production diminishing factors can be considered. The losses are multiplicative linked.

If cable- and transformer losses reduce the production by 2% and grid losses by further 3%, the Production Units have a efficiency of 95.06% = 100% x ((1 - 2%) x (1 - 3%)).

Efficiency Mode 

The efficiency sets the efficiency of the Production Units in percent.

When a facility has a guaranteed availability of 97% the Production Unit has a efficiency of 97% = 100% x 97%

Degradation Mode

Degradation is an "age discount", which defines the percentage the Production Unit decreases with increasing lifetime. Degradation is a dynamic amendment over time series. It's set in percentage per year, but the decrease occurs every month.

A facility with a yearly Degradation of 1.5% and a Production of 100 MWh/a respective 8.33 MWh in the first month has the following Production and Efficiency:

The particular Efficiency is calculated as follows:

Efficiency(t) = Efficiency x (1 - monthly Degradation)^t
Efficiency(06.2016) = 100% x (1 - (1.5%/12))⁵ = 99.38%

The displayed Efficiency for each Production Units and for the total park shows the average Efficiency over the whole Project Lifetime.

Loss Interaction

All loss modes are multiplicative linked. The Efficiency of a facility with an availability of 97%, cable- and transformer losses of 2% and a Degradation of 1.5% is calculated as follows:

Efficiency(t) = 100% x (1 - Losses_i) x Efficiency x (1 - Degradation)^t 

The Efficiency after 15 months (Start = 0) is 93.64%:

Efficiency(15) = 100% x (1 - 2%) x 97% x (1 - 1.5% / 12)¹⁵ =  93.29%