Search results for query: *

I once had to do this for a project. I gathered a fair amount of sample data and let Excel curve fit an equation that tells you how many ceramic bells (i.e. weather sheds) are required at a given voltage level, see below: Empirically derived equation (curve fit)where: kV is voltage (line to...

I am trying to find out what the typical number of open/close/open/close operations is possible for a high voltage circuit breaker (>69 kV). Many of the higher voltage circuit breakers are blast type breakers and are limited to just a few operations until the compressor can recharge. In my...

Ok, here is waht I need to provide: Primary Winding (i.e. H Winding): Winding Resistance in ohms Impedance in Percent MVA Base Tested Taps Secondary Winding (i.e. X Winding): Winding Resistance in ohms Impedance in Percent MVA Base Tested Taps The actual data sheet to be filled out is...

Hi Everyone, Perhaps I a bit rusty but in any case here is my situation: I am trying to complete a generation interconnection data sheet for submission. I have a project that will be using a 27/230 kV step-up transformer. It will be rated at 150 MVA. Now, given that the client has actually...

The Saks Power problem was caused by the loss of a 345 kV line in Minnesota (one phase ended up on the ground). That line loss caused another line to trip off sympathetically. David, the "western grid" mentioned here is the western part of the eastern grid. Always confusing when it is...

Your best bet is to us what you have--you say you have a large case in hand, presumably it is a PSLF *.sav or *.epc case. Open it in PSLF, go to the TRANS table, and start looking at the data. I would suggest exporting that data to Excel so you can perform some calculations, sorting...

Tuning of a Power System Stabilizer is something that requires a fair amount of studying, and then some testing of the generator. Typically you will need to simulate the proper PSS model in a transient stability program like PTI or GE's transient stability programs. This presumes you have a...

Blown up, or diverged cases in power flow solutions are fairly common. The step by step method for "fixing" these runs like follows: 1. Identify what caused the divergence--i.e. did you add a new line, change a generation pattern, paste in a new sub system, etc. It helps to know where the...