"get_reactive_power_limits not implemented for RenewableNonDispatch"

[GabrielKS]

Certain power flow runs fail with this message:

It looks like there is a possible solution here from @HaleyRoss.

[GabrielKS]

For reference, a quick workaround for this if you just need something to run is:

PowerSystems.get_reactive_power_limits(::RenewableNonDispatch) = (min = 0.0, max = 0.0)

[GabrielKS]

We have similars issues with get_active_power_limits, with similar workarounds that look like this:

PowerSystems.get_active_power_limits(::RenewableDispatch) = (min = 0.0, max = 0.0)

A principled solution is also needed for get_active_power_limits.

[GabrielKS]

Plan for get_reactive_power_limits(gen::RenewableNonDispatch): since the reactive power is fixed, this should return (min = get_reactive_power(gen), max = get_reactive_power(gen)).

[GabrielKS]

Plan in consultation with @jd-lara:

• Do not implement PSY.get_reactive_power_limits for RenewableNonDispatch, but insert logic into PowerFlows to behave as if the min and max were both the current reactive power setpoint
• Similarly, do not implement PSY.get_active_power_limits for the types on which it is missing, but act in PowerFlows as if:
  • for Source: infinite limits
  • for RenewableNonDispatch: min = max = setpoint
  • for RenewableDispatch: min = 0, max = rating