'test_PMSG_windturb.glm' - Connection topology

[Abo]

Hello,

I am testing 'test_PMSG_windturb.glm' from current release and trying to understand how wind turbine is connected to load meters (triplex meters).

The way I see, two step down transformers ( transformer_configuration:500 and transformer_configuration:400) which are connected to my_meter1 via xfmr24 transformer.

Wind turbine with constant load is also connected to single transformer (name IEEE13_SPCT_CONFIG;) via inverter in between.

I wonder if visual represenation can be drawn sch as

WIND_TURBINE--->Inverter--->Transformer--->my_meter1--->triplexLoad

And

Transformer:500--->Transformer:400--->xfmr24--->my_meter1--->triplexLoad

Any Thoughts?

Thank you

GridLAB-D 3.1.0-4884 (Hatwai) 64-bit LINUX RELEASE

[Abo]

Hello Again,

Attaching script file for rference.

Thanks

[Jason Fuller]

Abo,

I'm sorry, but I don't understand what your question actually is. I'm not really sure what you want thoughts on.

[Abo]

Hi Jason,

Thanks for response.

I am newbee to gridlabd and basically trying to understand how test_PMSG_windturb.glm works. I have attached GLM file in previous post with slight changes. Let say, I want to draw a block diagram of this example. See attached image file for provided GLM script. Here is online version of image file https://awwapp.com/b/ufkjhdqra/

Have I got test_PMSG_windturb.glm correct to illustrate logical blocks in image?

Thanks, and apologies in advance if its too off topic!

[Jason Fuller]

Abo,

For a PMSG, you will need to use an inverter-rectifier combination. See attached figure.

If you are trying to connect a large WT (like the Vestas V82 - 1.65 MW), you won't be able to connect it through a triplex system. You will need to attach it to a primary node (via a transformer).

[Abo]

Hi Jason,

That was helpful!

1) I understand that coupling of rectifier and inverter allows flow in both directions; AC/DC and DC/AC. However, only inverter object is specified in test_PMSG_windturb.glm

2) In current settings, I wonder if that would be possible to calculate WT generation from triplex-meter attached to direct transmission line of inverter. And I also assume that power consumption from main grid (Center--Tapped: Transformer) at loads (house objects) can be calculated from triplex-meter attached to these devices. Please, see the figure.

3) Where does single phase my_meter1 fit in this whole picture?

object transformer {
name xfmr24;
phases "ABCN";
from node2;
to my_meter1;
configuration transformer_configuration:500;
}

object meter {
name my_meter1;
phases ABCN;
nominal_voltage 350;
}

Thanks,

[Jason Fuller]

Abo,

1. When I look at the model, it has both:

object triplex_meter {
    name inv_meter;
        ...
}

object inverter {
    name inv1;
    parent inv_meter;
        ...
}

object rectifier {
    name rect1;
    parent inv1;
    ...
}

object windturb_dg {
    parent rect1;
    name windturb1;
        ...
}

1. Yes. You could also connect the triplex_line to the house's triplex_meter, then child the WT triplex_meter to the house triplex meter. This would allow for net metering plus generation sub-metering.

2. I'm not sure what my_meter1 is supposed to be or what you want it to do.