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2020-08-07 06:18:43 -0500	commented answer	How to simulate 2 systems with different frequency in one file? Hi Perolofl, Thank you for your feedback. I get the idea but I couldn't comprehend completely. I am familiar with per unit system for power, current, voltage and impedance. But I never knew that frequency can be stated in per unit.
2020-08-07 01:44:10 -0500	asked a question	How to simulate 2 systems with different frequency in one file? I want to simulate 2 systems (50 Hz and 60 Hz) connected by back-to-back HVDC link. How to set different frequency to different buses?
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2018-10-24 02:29:55 -0500	received badge	● Popular Question (source)
2018-10-21 23:18:22 -0500	asked a question	How to simulate unbalanced load flow in untransposed transmission line? If a transmission line is untransposed, there will be unbalance. How to simulate this in PSSE?
2018-03-11 20:12:12 -0500	answered a question	Genetic Algorithm - Python Yes you can. I once coded GA to optimize fault current limiter location and size. There are several GA libraries available out there. My recommendation is pyeasyga (https://pypi.python.org/pypi/pyeasyga). It's easy to use and it has several examples of implementation.
2017-11-07 20:05:53 -0500	asked a question	Changing transformer bus number Hello, I'm new to psspy. I want to change a transformer bus number (move it to another bus). How to do it? I read about twowindingdatachng4 API but still doesn't grasp the idea about changing bus number. As I understand, i and j as inputs are the original bus number. Where do I put the new bus number? Thank you.