SamehKozman's profile - activity

Thank you so much

I truly appreciate your generosity, as always. Can I ask about the 3.7513 value. What does it express? To make the fault current outputs in KA, I tried to use the command: psspy.ierr = short_circuit_units(1) but it seems not correct. Could you please help.

Thank you so much

Hello

What is the appropriate Python syntax which can calculate and provide only "Three-Phase (symmetrical) short circuit" at a certain bus. The "psspy.scmu" calculates additionally line to ground and double line to ground faults but I need only 3-Phase SC current and to be output it to a txt file by using this syntax: psspy.report_output(2, r"""SC-3PH.txt""", [0, 0])

Thanks in advance.

So grateful, thank you dear ❤️ it is completely solved

Words cannot adequately express my gratitude. I only have one step left.. psspy.branch_p_and_q_channel([202,1018,1]) python command will not make the PSSE plotting the P & Q So how can I solve for this? Also there is something strange .. the .out file is almost empty with less than 1KB!

Ok thank you so much. I modified it and also reduced the gain to only 5 and it initializes correctly. I have another question now if possible: Can I plot the MVAR output from this Switched Shunt (SVC) during dynamic simulation. HOW?

Thank you for your answer. What will be the effect or why we have to do this?

Hello, I'm trying to model a SVC using "Switched Shunt" in both Steady State and Dynamic. The SVC is calculated to be +/- 100MVAR. Accordingly, I adjusted the parameters of Switched Shunt Data Record to be as follow: Bus Number : 202 Control Mode: (2) Continuous Cntrl Voltage Adjustment Method: Nearest Combination Vhi (pu) = 1.05 Vlo (pu) = 0.95 Block 1 steps = 1 , Block (1) Bstep (MVAR) = -100 Block 2 steps = 1 , Block (2) Bstep (MVAR) = 100

These settings work very good in load flow with base case & contingency conditions and in each case the SVC inject or absorb reactive power maintaining the voltage on busbar # 202 = 1 pu.

However, when I modeled the SVC in .dyr file with the following parameters: 202, 'CSSCST', 0, 3000.0, 0.00, 0.00, 2.4, 0.00, 0.00, 100.0, -100.0, 0.50 /

The dynamic does not initialize INITIAL CONDITIONS SUSPECT: I DSTATE(I) STATE(I) MODEL STATE BUS# X-- NAME --X BASKV ID 868 19.548 -10.444 CSSCST K 202 ZOZOCAIRE225 225.00

The -10.444 MVAR is the Initial MVAR (Base Case) in load flow solution.

PLEASE ADVISE WHAT COULD BE THE MISTAKE AND HOW CAN I SOLVE IT.

Thank you so much for your valuable answer.

Concerning this Python script: psspy.report_output(2,r"""results.csv""",[0,0])

What preparations to the Excel file should I do prior using it? Because when I'm using the script the output file "results.csv" is empty (0 kB). I need that it contains the power flow outputs e.g. voltages on all buses.

Here is the complete code I wrote: psspy.case(r"""savnw""") psspy.fnsl([0,0,0,1,1,0,0,0]) psspy.report_output(2,r"""results.csv""",[0,0])

Thank you so much. It succeeded. I have PSSE Ver. 33.4 The options available were checking Scan for generators exceeding angle threshold I selected Angle Threshold 180 & MBASE threshold. So if needed now to trip by under frequency? I have to add ’FRQDCAT’ to my DYR file or other solution?

Hello,

What is the tool in PSSE which trips the generator in case the generator is subjected to a rotor angle instability? How to implement it?

Thanks in advance for all of you.

I get the following message when trying to initialize the model and sure I get INITIAL CONDITIONS SUSPECT: Out of file data--switch to terminal input mode

The message is written just under the Swing Bus summary

What is the mean of this message and how I can solve it?

Hello

I am beginner in PSSE. I need a Python code to draw QV curves for base case in addition to contingency cases for a certain bus number or group of buses and export the results (Figures) or even tabulated results to Excel. I am using PSSE Ver 33.4

With many thanks.

I am beginner in PSSE. Could you please explain how can I use this code?

Simple question.. How to add a comment or a message that appears when opening the PSSE model for example: Network Year 2025 - Peak Scenario

This message appears just after the below part: SIEMENS POWER TECHNOLOGIES INTERNATIONAL

  50000 BUS POWER SYSTEM SIMULATOR--PSS(R)E-33.4.0

         INITIATED ON THU, MAR 13 2025   9:19

Thank you so much for your valuable answer.

Could you please advise generic dynamic models for Wind Farms, one with 100MW and another with 30MW output power? Also generic models for PV Plants with 40MW and 15MW Peak? These renewable power plants are not sharing reactive power (Q) with the network.

Many thanks in advance

Thank you so much @abdul for your valuable answer.