Greenbyte Documentation

Normalized Power

One key aspect of solar PV sites is that not all inverters have the same DC capacity connected to them. Therefore, in order to make a true comparison between inverters at a site, we must account for these DC capacity differences.

The Normalized Power signal takes the AC power output of an inverter and normalizes against the DC capacity connected to the inverter.

This is an inverter-level signal and is used as an input signal for Production-based Availability (inverter normalized).This signal requires all inverters at the site to have metadata values specified for both AC and DC capacity. These metadata fields must be set on an inverter level.

Technology

Solar

Equation

norm_pow_eq1.png

Pnorm is the normalized power

CAC is the inverter’s AC capacity (metadata field)

CDC is the inverter's DC capacity (metadata field)

Peffective is the effective power

av_ac_norm_pow.png

is the average of all site inverters' AC capacity (metadata field)

av_dc_norm_pow.png

is the average of all site inverters' DC capacity (metadata field)

Inputs

normalized_pow_inputs.png

Usage example

Here plotted in data studio together with the power AC.

norm_pow_usage.png