This section describes how it is calculated the availability on Neteco 1000s and what is necessary to configure.
Prerequisites
· You have logged in as the system administrator, manager, installer, or guest user who has been assigned the historical data query permissions.
· Inverters have connected to the NetEco 1000S through the SmartLogger1000&2000, and there are at least 10 inverters connected to the same SmartLogger1000&2000.
· Total string capacity has been configured for inverters.
· An environmental monitoring instrument (EMI) is connected to a plant.
· Availability parameters have been configured for a plant.
Context
Availability is a key counter for evaluating the performance and reliability of a plant or inverter. At least 10 inverters connected to the same SmartLogger are required for calculating availability.
The availability calculation formula is as follows: EA = 1 – ΣiE(i)loss/(Etotal + ΣiE(i)loss).
· Σi indicates the sum calculated by recording time.
· E(i)loss indicates the energy yield loss of an inverter during a certain period. E(i)loss = PR x H x P. You can obtain the total energy yield loss by adding the energy yield loss of all inverters together.
– PR indicates the daily average PR value that meets configured PR value range in the last 10 days.
– H indicates the radiation increment during the recording period.
– P indicates the total string capacity of inverters that are in stopped state (or the active power output is 0).
· Etotal indicates the actual total energy yield of a plant.
Availability is not calculated for the period when the PR value is outside the configured range.
Availability is not calculated for the period when the downtime rate exceeds the configured threshold.
