## Mapping of parameters to IEEE1547-2018

As IEEE 1547-2018 [1] has been widely adopted, Table 3 lists the mapping between the applicable properties from the standard to OpenDSS PVSystem and Storage elements.

Table 3: Mapping of Parameters between OpenDSS and IEEE1547-2018

OpenDSS |
IEEE1547-2018 |
IEEE 1547-2018 Description |
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kWRated (for Storage) |
Nameplate Active Power Rating |
Active power rating in watts at unity power factor |
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kVA |
Apparent Power Maximum Rating |
Maximum voltamperes |
apparent |
power |
rating |
in |

kvarMax |
Reactive Power Injected Maximum Rating |
Maximum injected reactive power rating in vars |
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kvarMaxAbs |
Reactive Power Absorbed Maximum Rating |
Maximum absorbed reactive power rating in vars |
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Not implemented as a specific property in the current version. Assumed equal to kWRated |
Active Power Charge Maximum Rating |
Maximum active power charge in Watts |
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Not implemented as a specific property in current version. Assumed equal to kVA |
Apparent Power Charge Maximum Rating |
Maximum apparent power charge rating in voltamperes. May differ from the apparent power maximum rating |
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kV |
AC Voltage Nominal Rating |
Nominal AC voltage rating in RMS volts |

Note that for PVSystem element, there is currently no kWRated property. However, the property can be modeled with the “Limit DER Power Function”, by specifying an appropriate value to %Pmpp. Also note that, for Storage, IEEE1547-2018 states that both the active power charge maximum rating and the apparent power charge maximum rating may differ from their discharging/generation equivalent parameters. The current version of OpenDSS accepts only a single kWRated and a single kV A, which are assumed to be the same for charging and discharging states.