Re: pf.nr.max_it

[Carlos E Murillo-Sanchez]

Russ Patterson wrote: Hi friends,   Per Table 4-2 in the manual, I want to increase the number of iterations to solve my power flow.  So, I added a line to my .m file as you see below.  But, it seems to be ignored as I only get 10 iterations.  Is this the proper place to specify?     %% MATPOWER Case Format : Version 2 mpc.version = '2'; % %% Try to run more than the default 10 iterations %pf.alg = 'NR'; pf.nr.max_it = 30;   Here was result:   Newton's method power flow (power balance, polar) did not converge in 10 iterations.   >>>>>  Did NOT converge (3.60 seconds)  <<<<<     Thank you, russ   p.s. Just fyi, when I search the pdf manual on “pf.nr.max” it works fine.  Searching on “pf.nr.max_it” finds nothing.   If I replace the underscore with a space then search will find occurences of pf.nr.max_it just fine (“pf.nr.max it”). Weird! Russ: The options structure must be passed along as an optional argument to runpf().  Something along these lines: method 1: tell mpoption to modify a specific field in the returned structure >> myoptions = mpoption('pf.nr.max_it', 20) >> mpc_out = runpf('case30', myoptions); method 2: create a default options structure and manually modify a field in it: >> myoptions = mpoption; >> myoptions.pf.nr.max_it = 20; >> mpc_out = runpf('case30', myoptions); Note that all MATPOWER functions also use the traditional MATLAB "help" documentation;  I suggest that you do these at least: >> help caseformat >> help mpoption >> help idx_bus >> help idx_gen >> help idx_brch >> help idx_cost >> help runpf carlos.