Thanks Doug and Electric pete. I imported all the correct modules and it seems to be working.
Good points on use of the function too electric pete. I think as long as I keep that in mind it shouldn't be difficult to work around.
Thanks!
Thanks for the link doug. It looks like they have code for finding the determinant of complex matrix, but I didn't see anything for inversion of a complex matrix. Any ideas where I might find code for that in VBA?
Thanks!
The goal is to have an application that can be run on any PC without installing any other software except the application itself so I don't want to use matlab or similar software. I was hoping to find programming libraries for building matrices, complex numbers and performing matrix math...
Hello,
I am considering taking some calculations that presently performed using MathCAD and creating an application to perform those calculations instead. The calculations involve creating a matrix of complex numbers and performing some matrix math operations to arrive at the solution. The...
Hello,
I am considering taking some calculations that presently performed using MathCAD and creating an application to perform those calculations instead. The calculations involve creating a matrix of complex numbers and performing some matrix math operations to arrive at the solution. The...
Electromagnetic Transients Programs (EMTP) can be used for this as well. There is a variety of software programs on the market. The Alternate Transients Program (ATP) is the free version:
http://www.EMTP.org
The fault tamer applies at 34.5kV in an outdoor cut-out type....also checkout Eaton's selection of CL fuses. I haven't seen anyone advertising that high of an interrupting rating for 34.5kV CL fuses though...
The resistance setting you are referring to is not the neutral grounding. The setting is supposed to be the winding resistance of the transformer. This is not used for "typical" protection elements (i.e. transformer differential or o/c elements). It can be used in thermal calculations using...
the ngr is limiting the SLG contribution from the large transformer, this will not change from what you are describing. the 4160/480 transformer will make an additional SLG contribution if you ground the HS wye. the additional contribution of the smaller transformer is going to be relatively...
If you run the model in the transient stability mode, you can choose to run a load flow to set the initial conditions. When the transient simulation begins all generators are modeled dynamically from time = 0+
In the dynamic motor start study in ETAP the exciters/governs aren't model (ref page 16-24 in manual). If you want to include the dynamic characteristics of your generators you have to run the motor start as a transient stability study.
have you tried working with your MV VFD vendor? I am assuming you have one sense it appears this is the source of your issue.
in general, I would recommend getting an accurate model of your system including modeling your harmonic injections from VFDs and then determine what you want to use to...
"Electrical power equipment maintenance and testing" By Paul Gill, has a short section on root cause analysis. In general the "ask why five times" method works pretty well. Is there a more specific subject you are looking for?
It appears that there are some security issues for the MHO ground element in this application. SEL has a good technical paper on this subject "Application Considerations for Distance Relays on Impedance-Grounded Systems".
