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8.4 Aggregations for Multi-Inverter Sites (GFEMS)

When multiple DER are being represented by one LFDI as a Generating Facility Energy Management System (GFEMS) the communications software client shall provide a representative value for the whole site as below:

DERSettings

DERCapabilities

Aggregation

setMaxVA

rtgMaxVA

Total

setMaxVAr

rtgMaxVAr

Total

setMaxVArNeg

rtgMaxVArNeg

Total

setMaxW

rtgMaxW

Total


Table 3 – Aggregation of DERSettings and DERCapabilities


DERStatus objects

Aggregation

OperationalModeStatusType

1 = Off: applies when ALL managed devices are off

2 = Operational mode: applies when at least one managed device is in operational mode

3 = Test mode: not used

ConnectStatusType

0 = Connected: applies if any device is connected but not in any of the subsequent states

1 = Available: applies if any device is available but not in any of the subsequent states

2 = Operating: applies if any device is operating but not in any of the subsequent states

3 = Test: not used

4 = Fault/Error: applies if any device is in Fault/Error state


Table 4 – Aggregation of DERStatus