How to control spefic loads by using Python API

[IN KWON PARK]

Hello there,

Would you allow me to ask this question?

In my openDSS file, a series of loads were added to a 3-phase bus (or collection of nodes) in this way:

New Load.671 Bus1=671.1.2.3 Phases=3 Conn=Delta Model=1 kV=4.16 kW=1155 kvar=660
New Load.671a Bus1=671.1 Phases=1 Conn=Wye Model=1 kV=4.16 kW=1 kvar=1
New Load.671b Bus1=671.2 Phases=1 Conn=Wye Model=1 kV=4.16 kW=1 kvar=1
New Load.671c Bus1=671.3 Phases=1 Conn=Wye Model=1 kV=4.16 kW=1 kvar=1

Then, if I run these lines through the Python interface, what would happen?

dssCircuit.SetActiveBus('671.1') 
dssCircuit.Loads.kW     = 1000.0;
dssCircuit.Loads.kvar   = 500.0;

What I wanted to do is control 'Load.671a' only, but in the codewise, I cannot find the necessary distinction between 'Load.671' and 'Load.671a'.

Best Regards,

In Kwon Park

[Davis Montenegro]

Hello,

Well, that's because you are doing it incorrectly. To select a load, you have to activate the load, not the bus, buses are not objects and are only used as a reference across the model. So, if you want to control load 671, do as follows:

dssCircuit.Loads.Name = '671'; 
dssCircuit.Loads.kW     = 1000.0;
dssCircuit.Loads.kvar   = 500.0;

To go for load 671a, do as follows:

 dssCircuit.Loads.Name = '671a'; 
dssCircuit.Loads.kW     = 1000.0;
dssCircuit.Loads.kvar   = 500.0;

Please check the COM help file.

Best regards

Davis

[IN KWON PARK]

Hello,

Thank you for your answers!
Certainly, I'll check the COM help file.

Best Regards,

In Kwon Park

[Roger Dugan]

You have the wrong voltage for the three 1-phase loads. Should be kV=2.4.

[IN KWON PARK]

Yes. You are absolutely right. It was my mistake, a result from careless copy and paste.

In Kwon Park