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There are not any real benefits to selecting a high number of buses to initialise PSSE with

I wanted to know if initalising PSSE with a low number of buses would cause a crash, or give incorrect results. I wrote a small program that initialises PSSE with 10 up to 200,000 buses and observed the memory usage, and whether PSSE crashed.

The small program then loads a saved case with 1600 buses and solves it.

None of the tests crashed, not even when I had initialised with 10 buses then loaded a case with 1600 buses.

Here is a chart showing the memory usage that I observed for each number of initialised buses:

image description

I advise to select a low number of buses like 8000, PSSE will automatically scale up for you if you get it wrong.

There are not any real benefits to selecting a high number of buses to initialise PSSE withmust be initialised with sufficient bus numbers

I wanted to know if initalising PSSE with a low number of buses would cause a crash, or give incorrect results. I wrote a small program that initialises PSSE with 10 up to 200,000 buses and observed the memory usage, and whether PSSE crashed.

The small program then loads a saved case with 1600 buses and solves it.

None The tests crashed when the initialised bus number was less than the number of the tests crashed, not even when I had initialised with 10 buses then loaded in a case with 1600 buses.raw file.

Here is a chart showing the memory usage that I observed for each number of initialised buses:

image description

I advise to select a low number of buses like 8000around 10,000 buses, PSSE which seems to be adequately sized, unless you know there will automatically scale up for you if you get it wrong.be more than that many in your system.

PSSE must be initialised with sufficient bus numbers

I wanted to know if initalising PSSE with a low number of buses would cause a crash, or give incorrect results. I wrote a small program that initialises PSSE with 10 up to 200,000 buses and observed the memory usage, and whether PSSE crashed.

The small program then loads a saved case with 1600 buses and solves it.

The tests crashed crashed when the initialised bus number was less than the number of buses in a raw file.

Here is a chart showing the memory usage that I observed for each number of initialised buses:

image description

I advise to select around 10,000 buses, which seems to be adequately sized, unless you know there will be more than that many in your system.

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Fixed link to memory usage chart.

PSSE must be initialised with sufficient bus numbers

I wanted to know if initalising PSSE with a low number of buses would cause a crash, or give incorrect results. I wrote a small program that initialises PSSE with 10 up to 200,000 buses and observed the memory usage, and whether PSSE crashed.

The small program then loads a saved case with 1600 buses and solves it.

The tests crashed when the initialised bus number was less than the number of buses in a raw file.

Here is a chart showing the memory usage that I observed for each number of initialised buses:

image descriptionimage description

I advise to select around 10,000 buses, which seems to be adequately sized, unless you know there will be more than that many in your system.

click to hide/show revision 5
information about dynamics studies

PSSE must be initialised with sufficient bus numbers

I wanted to know if initalising PSSE with a low number of buses would cause a crash, or give incorrect results. I wrote a small program that initialises PSSE with 10 up to 200,000 buses and observed the memory usage, and whether PSSE crashed.

The small program then loads a saved case with 1600 buses and solves it.

The tests crashed when the initialised bus number was less than the number of buses in a raw file.

Here is a chart showing the memory usage that I observed for each number of initialised buses:

image description

I advise to select around 10,000 buses, which seems to be adequately sized, unless you know there will be more than that many in your system.

(edit)

Thanks to @EBahr for pointing out, but PSSE actually limits the number of CONs VARs, STATEs and ICONs available to the dynamics case depending on the bus limit.

So if you are doing some dynamics work, it would pay to have as many dynamic variables available to you as possible and you should set your bus limit at 150,000 buses which is the maximum number of buses.