Re: addmitance matrix(zbus), nodal currents

2014-01-21 Thread Abhyankar, Shrirang G.
From: Alexandra Kapetanaki mailto:alexandra.kapetan...@manchester.ac.uk>> Reply-To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Date: Tue, 21 Jan 2014 23:36:23 + To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Subject: RE: addmitance matrix(zbus), noda

RE: addmitance matrix(zbus), nodal currents

2014-01-21 Thread Alexandra Kapetanaki
Dear Shri, Thank you for your response! How can I calculate the shunt addmitance of a line jk (yj->k) in pu? For instance, the 24 bus system has ysh=0-j100(MVAR) , but this is the bus(->6) shunt addmitance matrix. How can I obtain the shunt addmitance of a line? Thank you in advance, Kind Regard

Re: How to block displaying OPF messages

2014-01-21 Thread Abhyankar, Shrirang G.
Those messages are generated by MATLAB. You can turn them off by using the warning command. But I doubt if you want to suppress these warnings. Matlab's warning 'Matrix is singular to working precision' indicates the linear solver's (backslash operator) failure and as such the results obtained w

How to block displaying OPF messages

2014-01-21 Thread Abouzar Estebsari
Dear Matpower community I would like to block all the messages which are being poped out during running OPF on a case study. I could comment the logs which display the results but if my case cannot get converge, I see some messages regarding the mathematics solvers saying the matrix is singular fo

Re: addmitance matrix(zbus), nodal currents

2014-01-21 Thread Abhyankar, Shrirang G.
From: Alexandra Kapetanaki mailto:alexandra.kapetan...@manchester.ac.uk>> Reply-To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Date: Tue, 21 Jan 2014 12:37:07 + To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Subject: RE: addmitance matrix(zbus), noda

RE: addmitance matrix(zbus), nodal currents

2014-01-21 Thread Alexandra Kapetanaki
Dear Shri, Ray Thank you very much for your response. I constructed the Ybus matrix and I found the voltage bus from Vf(f,1)=results.bus(f,VM)*exp(1j*results.bus(f,VA)*(pi/180))*mpc.bus(f,10); So in order to define the nodal currents in a 4 bus system I have to do the following calculations?? I