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May be the link below might be of some use to you http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=13321&objectType=file

I think what you need is to write your own plotting functions. C# is a good programming language for that purpose. If you are not a programmer and the requirement is not too complicated , I might do it for you (for free).

cloudaltas, As rraghunath said df/dt and maybe even dv/dt could be useful. Another method might be to use what is known as vector shift protection , which is specially geared up to detect islanding conditions.

Chatman is correct. Another way to look at it would be in vector form the resulting vector would rotate clockwise instead of anti-clockwise if you use j*2PI.K/N instead of -j 2PI.K/N. Simple way to fix this without changing too much code would be to change your imaginary coeff's , multiply all...

Nimbus, There is a simple way to do this , It is not elegant or fast but will do the job The assumption in the snippet below is that you want to calculate the magnitude and phase of all frequency components , say from 0th to 40th harmonic in a set of data sampled in real time . N is the number...

I am pasting below (From MSDN) the description of WinMain function.As given below lpCmdLine contains the arguments passed to it. WinMain The WinMain function is called by the system as the initial entry point for a Win32-based application. int WINAPI WinMain( HINSTANCE hInstance, //...

Sabap, It's best to treat the two issues separately. Power Swings : The relay should block the operation of distance elements during power swings (depends on the chosen setting)even though the impedance seen by the relay is inside the characteristic. The settings for Power swing blocking...

I know of a HORM relay which is basically diferential protection over pilot wire ( "Translay" protection). I would try Areva /ALSTOM for confirmation that it is indeed that form of protection.

RIO files for GE multilin may be hard to find if they haven't collaberated with OMICRON. I think you will find it to be same for most ALSTOM/Areva relays. But personally I don't see much of a problem because you can use the differental or the Advanced differential module in the OMICRON test...

Areva have replacements for MCHN02 , namely P42x series and P22x . But if you badly need a MCHN02 manual , you may be able to get one from the Contact centre at Stafford. +44 1785 223251

You can get a technical manual of MCHN02 but you will have to ask the AREVA AIS unit (Stafford U.K). I think it is available by request only. www.areva-td.com.

In Adobe Reader 6.0 it is under Edit->preferences->internet

In Acrobat 5.xx and 6.xx when you start up Acrobat , a dialog box will pop up asking you to enable Acrobat for Web browsing.

Alan, Areva (ALSTOM) conduct various courses in Stafford. You can contact June.Morrall@areva-td.com for more details.

WE have used OMICRON extensively and found it to be very useful. The Test Universe software has all the modules you need to test different relays. Can't give you a comparison with DOBLE as the DOBLE's I have used are very old.

There are no pro's for the relay . Depending on the type of CVT , the transient introduced by the fault has varying effects. A CVT with a passive damping circuit is normally not much of a problem for numerical relays as the transient is a decaying d.c with RC time constant of the circuit. But...

FPGA's are used in protective relays to handle signal processing and sometimes even filtering. I am not a hardware designer myself but I know that they are used in interprocessor communication. In a nutshell they take a load off the CPU by doing basic logic functions , but since they are...

I have used the code composer with TMS320C32 amd C33 without any problems(Although we had to download some patches from the web site). Could it be that the problems stem from the real time behavior in the emulator? ( data acquisition etc. falling over when break points are set)

Manv, I didn't understnad your question fully but from what I know Inter -trip signals can be sent over PLCC and fibre optic (NGC in U.K does that). But I don't think it is the PLCC signal which is converted to fibre optic but the output from the relays which is sent over the two seperate media.

I haven't done much Kalman filtering but what I have experience in is tracking. I have found Fourier based frequency tracking to be very reliable. We have been able to track changes upto 20Hz/sec by adjusting the sampling frequency every other sample (2.4 KHz sampling frequency).Fourier based...