How to get a PTDF matrix in PSS/E... Please Help.

asked 2017-01-27 13:38:09 -0500

abhishek_t
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updated 2017-01-28 14:59:19 -0500

jconto
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I was trying to find the PTDF matrix in PSS/E but wasn't able to figure it out. The Dfax function calculates the OTDFbut not the PTDFs. I have tried differenct things from the manual like trying to run TLTG, SPIL. Please direct me in the appropriate direction.

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answered 2018-01-18 13:10:26 -0500

Jesse
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Not sure what your end goal for a PTDF matrix is, but the pssarrays.sensitivityflowto_mw API calculates the flow impact of machines and loads to a specified branch.

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answered 2017-03-28 03:29:15 -0500

yaya
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can you be generous and explain the meaning of PTDF and OTDF? what is their purpose.

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The following posting "https://www.powerworld.com/files/TrainingI11LinearAnalysis.pdf" discusses those two concepts. You can also search the net for "ptdf calculation"

jconto ( 2017-03-28 14:03:53 -0500 )edit

thank you, can we say that the output pf PTDF is the sameas the activity TLTG inPSSE

yaya ( 2017-03-29 04:54:29 -0500 )edit

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answered 2017-03-24 17:00:43 -0500

Khristopher
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I'm afraid you may have to make a routine your self in Python to build PTDF matrix, extracting the data from PSS/E. The PTDF is based on Ybus matrix, reactance >> resistance, so all resistance in "R" column to zero "0". Then extract Ybus from PSS/E and work with it in Python to build the PTDF matrix. There could be other parameters than affect the construction of the Ybus, take care of it. I remember you can't build the PTDF matrix directly from PSS/E but the LODF. LODF can be build directly with a command.