Thank you. I appreciate your help. On Thu, Nov 7, 2013 at 10:08 AM, Shri <[email protected]> wrote: > > On Nov 6, 2013, at 11:15 PM, Vincent Roberge wrote: > >> Good day all, >> >> I am a student and I am trying to fully understand the N-R method for >> power flow analysis. I wrote a C program that does it and I compare my >> output to the one generated by MATPOWER. Everything matches until I >> try case2736sp. In this case, the generator setpoint voltage and the >> initial guess for the bus voltage associated to the generator do not >> match. Instead of forcing the voltage of the bus to the generator >> setpoint, MATPOWER uses some sort of a ratio which I don't undestand >> at all. This all occurs in the file "runpf.m" at line 201: >> >> V0(gbus) = gen(on, VG) ./ abs(V0(gbus)).* V0(gbus); > > This just uses the set point voltage magnitude gen(on,VG) and the phase angle > from the bus data to form the initial guess for the complex generator bus > voltages. > You can interpret the above line as > > V0(gbus) = gen(on,VG).*exp(sqrt(-1)*angle(V0(gbus)); > >> >> How does this work? There must be something I don't understand about >> generator setpoint. What is generator setpoint? Anyone willing to help >> and explain me that line of code. Thanks in advance. >> >> >> -- >> Vincent >> > > >
-- Vincent
