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Greenbyte Documentation

Denormalized Power

The Denormalized Power signal calculates how much Power DC an inverter should have produced if it was performing to the standard of the best inverters. This is a Potential Power value. Two things happen at this stage:

  1. The power is denormalized, that is, the reverse of the normalization sum, with the nominator and denominator in the equation, switched.

  2. The power is calculated in DC to give a figure for how much the inverter should have produced, compared to the other inverters.

Denormalized_Power_-_Description.png
Technology

Solar

Remarks

The Denormalized Power will be clamped so that it does not exceed the inverter’s AC capacity.

For this signal to have a value, it must follow the Rules for Referencing Devices that concerns Primary meter mapping and that the following metadata values are defined:

  • AC Capacity (kW) (Inverter metadata 30) – Must be defined for the inverter

  • DC Capacity (kWp) (Inverter metadata 7) – Must be defined for all inverters mapped to the same Primary meter

Equation
Denormalized_Power_-_Equation.png

Where:

Pdenorm

is the Denormalized power

CDC

is the DC Capacity (kWp) (Inverter metadata 7)

DC

is the average of the DC Capacity (kWp) (Inverter metadata 7) of all inverters with the same primary meter

CAC

is the AC Capacity (kW) (Inverter metadata 30)

DCPnorm,ref

is the Reference Normalized Power

Inputs
Denormalized_Power_-_Inputs.png
Usage Example

Here, Denormalized Power is plotted against the other Production-based Availability helper signals. In this site, all the inverters have the same DC Capacity, and so they all show the same values for Denormalized Power:

Denormalized_Power_-_Usage_Example_1.png

Denormalized Power is plotted against Effective Power and Power DC here. This shows that there is a significant difference between how this inverter has performed (Effective Power (AC) and Power DC) and how it should have performed compared to the top 50% of inverters - Denormalized Power:

Denormalized_Power_-_Usage_Example_2.png