CamillusRex's profile - activity

Greetings,

I'm trying to study the effects of PV modelling on system stability. Almost all the PV in my system is distributed/small-scale, rather than large-scale "plants". I would therefore like to use the PVD1 model, which the WECC recommends for this purpose (see their Solar Plant Dynamic Modelling Guidelines). However, unlike the large-scale PV models (REGCA, REECB, REPCA) the PVD1 model is not included in the PSSe model library (I'm using PSSe 34).

Does anyone know if a PSSe-compatible PVD1 model exists somewhere, and if yes, can anyone walk me through the procedure of compiling + linking it? If not, might there be a workaround -- using another model to emulate PVD1 functionality?

Thanks in advance!

:D Thank you so much! That's exactly what I was looking for and I feel kind of stupid for not discovering it myself now.

Greetings,

The STATE_CHANNEL command lets you assign states (e.g. motor slip) to output channels for dynamic simulation. However, it requires as its input the "index" of the state you want to see -- basically, as you add models to the system, their states are appended to a single big list, and PSSe wants to know where in that list the requested state is.

Obviously, the index of a given state may change as you add or remove other models. So I was wondering, is there a way to identify a state by meaningful parameters, e.g. "give me the Nth state of model X at bus Y"? I hate having to slog through DOCU output to note the state numbers every time I change something about my modelling setup.

Many thanks in advance!

Issue fixed. I was being an idiot and forgot to change the bus type code from "load" to "generator" when I added wind machines... which understandably confused PSSe. It works as it should now.

Yeah, that's what I'm trying too, and I do have the wind control mode flags set properly... Still I'm seeing 0 everywhere. :/ Thanks for the reply though!

So I'm running a dynamic study in PSSe, trying to investigate the effects of wind farm modelling on system stability. Some of the first results I've gotten are rather counter-intuitive, so I'd like to probe a little deeper into what's going on -- for example, by looking at the P and Q infeed from the wind farms, as well as the slip (speed deviation) of induction-type wind generators (WT1 and WT3). However, PSSe refuses to cooperate.

• When I use CHSB with PELEC and QELEC as the parameters to add, it simply skips over my wind machines.
• When I explicitly try to add the parameters of specific wind machines using MACHINEARRAYCHANNEL, the channels do show up in the output .txt file, but all values are 0.
• When I try to add the generator speed deviation with STATE_CHANNEL (it's a state in both the WT12T1 and WT3T1 models), again the channels show up but with all values at 0.

Is anyone familiar with these issues and do you know a way around them? I'm using PSSe 33.9. Many thanks for any help you guys can provide!

Hello all,

As suggested in another thread I am using a GENCLS model with H = 0, D = 0 as an infinite generator (infinite inertia, i.e. constant speed and rotor angle). The PSSe Model Library description of GENCLS confirms that the model can be used in this way:

If H is 0, then DSTATE(K) and DSTATE(K+1) will always be zero.

where DSTATE(K) is the speed deviation and DSTATE(K+1) is the rotor angle.

However, when I simulate a system including such a generator, its rotor angle does vary! I have checked a hundred times -- the H constant is really set to zero.

One odd thing is that when I look up the model in the "Dynamics data" tab in the GUI, and I click "Edit Model", I get the following message when I try to save the changes (and even if I haven't changed anything):

Model data contains warnings and/or errors. This could cause simulation errors or crashes.

Perhaps this is a lead as to what's going on? I'm using PSSe 33 if that matters.

Many thanks for any help you guys can give!