Re: AC OPF Convergence Issue

2018-03-13 Thread Ray Zimmerman
Making Vm = 1 means that the voltage is equal to its nominal value specified in the BASE_KV column of the bus matrix. Regarding relaxing line limits, first this is the one case where setting them to zero is interpreted as completely unconstrained. That is a reasonable thing to try in the proces

MOST and ramp rates (was Re: Ramp AGC)

2018-03-13 Thread Ray Zimmerman
That’s basically true. To be more specific, RAMP_10 is used to determine the amount that a contingency dispatch can deviate from the corresponding base case, or to limit the reserve supplied by a unit when using fixed zonal reserve requirements. And RAMP_30 is used to determine how much a base c

Re: AC OPF Convergence Issue

2018-03-13 Thread Aakanksha Dubey
Thank you for the guidance! The main issue was with the values I assumed for Vm. My case is converging now. sincerely, Aakanksha *Dubey* On Tue, Mar 13, 2018 at 9:52 AM, Ray Zimmerman wrote: > Making Vm = 1 means that the voltage is equal to its nominal value > specified in the BASE_KV column

RE: MOST and ramp rates (was Re: Ramp AGC)

2018-03-13 Thread Bainan Xia
Thanks for the explanation! I’ve figured out which constraint is actually binding in my case. Best, Bainan From: bounce-122375618-80810...@list.cornell.edu [mailto:bounce-122375618-80810...@list.cornell.edu] On Behalf Of Ray Zimmerman Sent: Tuesday, March 13, 2018 7:11 AM To: MATPOWER discussio