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Greenbyte Documentation

Time-based Contractual Availability (Inverter)

This signal calculates the ratio between Available time and Total time, based on the status categories defined in the inverter's availability contracts.

A contract determines whether the categories should be allocated to Available time or Unavailable time or, in some cases, Excluded from the calculation.

Technology

Solar

Remarks

Allocation of available time and unavailable time is based on contract categories. Each category specifies whether the time of a status event should be allocated to Available time, Unavailable time, or Excluded. Contractual categories have a priority, which is used to determine how to allocate the period when statuses from multiple categories are active at the same time.

Optional metadata field:

  • Availability Irradiance Cut-In (W/m2) (Inverter metadata 8)

Time-based_Contractual_Availability__Inverter__-_Remarks.png
Equation

For each period, the inverter will be seen as Available, unless I < = Cut-inIA, alternatively:

  • If I or Cut-inIA is undefined, where the Irradiance below cut-in setting in the contract will define, if the period is seen as Available, Unavailable, or Excluded.

  • If there exists a categorized status, where the contract category for the status decides, if the period is seen as Available, Unavailable, or Excluded.

  • If there is an uncategorized Stop status and P < = 0, it means that the period will be seen as Unavailable.

  • If there is no status or the status is uncategorized and not a stop, and P and I have a value, it means that the period will be seen as Excluded.

  • If there is no status and P < = 0, where the No status event and no power output setting in the contract will define, if the period is seen as Available, Unavailable, or Excluded.

Where:

P

is the Power with fallback

I

is the Solar Irradiance Reference

Cut-inIA

is the Availability Irradiance Cut-In (W/m2) (Inverter metadata 8)

The Time-based contractual availability is calculated as the sum of periods, as per the following resolution:

Time-based_Contractual_Availability__Inverter__-_Equation.png

Where:

AT,contract

is the Time-based contractual availability

Ta

is the amount of time where data is Available

Tu

is the amount of time where data is Unavailable

Inputs
Time-based_Contractual_Availability__Inverter__-_Inputs.png
Usage Example
Time-based_Contractual_Availability__Inverter__-_Usage_Example_1.png

In this example, you can see that there is a shortstop status for the inverter. The status is set as Unavailable according to the contract, so the availability goes down during the same period.

Contract settings:

Time-based_Contractual_Availability__Inverter__-_Usage_Example_2.png