Re: SCOPF using MATPOWER

2017-08-10 Thread Kardoš Juraj
Hello, ad 1) the most conservative approach would be that you compute a dispatch that will be secure in nominal case and in all contingency scenarios, however restrictive this might be. Considering N-1 security of line failures, you simple replicate all mismatch equations and line power flow li

SCOPF using MATPOWER

2017-08-10 Thread Brandon Eidson
List, I have been writing code to implement basic power/optimization calculations. I started with power flow, then DC power flow, then OPF. I have been using MATPOWER as a source of case systems and to check my results. I am in the process of implementing N-1 (in hopes of moving on to N-1-1). I

Error in running power flow

2017-08-10 Thread mahraz amini
Hi all, I am trying to run power flow on my power network with different load profiles, while all generators are enforced to be within their Q limits. However, sometime I face this error : Newton's method power flow did not converge in 10 iterations. Gen 17 at upper Q limit, converting to PQ bus

Re: Power Flow does not converge

2017-08-10 Thread Ray Zimmerman
Do you have a small (the smaller the better) example that exhibits this problem? It’s possible that convergence requires automatically updating the settings of other controls (like other transformer taps or something). Thanks, Ray > On Aug 9, 2017, at 7:06 PM, Chenxi Lin wrote: > > Hell

Re: CPF bug when cpf_corrector failes on first iteration

2017-08-10 Thread Ray Zimmerman
Thanks for catching this. Would you mind creating a bug report with these details the GitHub issue tracker ? Thanks, Ray > On Aug 8, 2017, at 9:06 AM, Elis Nycander wrote: > > Hi, > > I have found a small bug in the CPF function. Suppose the

Re: DCOPF not converging for large system

2017-08-10 Thread Ray Zimmerman
Is the initial power flow feasible? My guess is that the initial power flow is violating one of the generator limits, so when you enforce them with the OPF, the solution is no longer feasible. Ray > On Aug 8, 2017, at 3:45 AM, prem panigrahi wrote: > > > Dear all >I am facing