yunzhi cheng's profile - activity

No, I don’t think so.

Google dmview

not sure about your purpose. I know people run voltage step change tests: force the POI voltage to drop or increase and check the Q response of the test unit.

try dmview

To bring frequency back to 60Hz, you need a AGC model

https://sites.google.com/view/dmview/home

If you use DMView, the LVRT profile is at DATAs folder.

DMView can help you run model tests.

DMView can help you to run model tests. https://sites.google.com/view/dmview/home%3C/p%3E (https://sites.google.com/view/dmview/home)

Thanks. I used the similar way like this: reading log file while loading DYR data. Your way is much nicer with a defined function. However, I think there should be an API to do this. Reading log/report file is a little weird.

I use Way 2 - Secure and API use

Excellent logic. Is the same logic applicable to get the number of VARs? PSSE does not provide API to get the number of VARs in the case. I tried to apply the same logic using: ierr, rval = dsrval('VAR', indx) However, ierr is alwyas zero even indx value is bigger than the total VAR in the case.

Very interesting. Thanks for the reminding.

Either you made some mistakes or the model was poorly written.

Interesting. Psse has some api to obtain data (such as gen, line) per subsystem basis. After that, it is easy to count the number of devices by looking at length of the array.

This is right. There is maybe a physical limit. At the same time, optimizing the electrical control model of wind can probably help its stability performance

If you don’t want to use the playback model, you can still run voltage response test by write a UDM exciter model to set Efd based on the specific voltage curve that you want to achieve. Or you modify Efd in conec. The easiest way is to use playback.

Use ETRAN PLUS

https://sites.google.com/view/dmview/home

Frequency swept in psse can be done with short circuit analysis, in stead of power flow analysis. Refer to this paper: https://ieeexplore.ieee.org/abstract/document/7741951%3C/p%3E (https://ieeexplore.ieee.org/abstract/document/7741951)

Write your own python script

DC model is not good for such simulation. The voltage problem will be masked.

To simulat a frequency stability (assume it is only for frequency decay), modeling the renewables as negative loads is OK. Also when you convert the load to ZIP model, use the constant power model so the output is not affected by the voltage change. Also don’t apply frequency dependency on it to make sure its output does not affected by frequency too.

You can download and try it: https://sites.google.com/view/dmview/home%3C/p%3E (https://sites.google.com/view/dmview/home)

I have created a tool named "DMView" to run voltage response test including voltage step change test.

You need build AGC model in PSS/e as well. However, PSS/e is not designed for AGC simulation and most governors have only a primary droop control. I once tried GGOV1 model, which can receive a supervisory MW set signal. So it is possible to link your AGC output to Pmwset of GGOV1 model to achieve AGC simulation. But it is still not very convenient. MATLAB is more suitable for AGC simulation.