hello
I'm student of electrical engeenearing.Ihave some questions about opf at 
matpower.at"poewer system analysis" by Johnj.grainger
and WilliamD.Stevenson- i understood for computation lambda we have gencost 
function (Quadratic function like   C= aP^2 +bP+c)
and lambda=dc/dp , and for optimal power flow all the lambdas must be  
equal.but at matpower when we run the opf ,for each  bus
we earn one lambda.i want to know  what function we use and how it compute.(for 
example for PQ buses.)  
another question , at help IDX_BUS it said :" bus(:, VMIN) = 0.95;   % set the 
min voltage magnitude to 0.95 at all buses"
but when you type it at matlab prompt it never influence our computation.please 
help me about this .(have can i set the min voltage magnitude to 0.95 at all 
buses)
Best regards



      
  • opf matpower hamid tahery2009

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