Set Qmin = -20 and Qmax = 0. MATPOWER will then create an extra constraint to ensure that QG/PG for that unit is always equal to 0.4, even if the load is curtailed from its nominal 50 MW.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Apr 26, 2013, at 5:30 AM, Jiashen Teh <[email protected]> wrote: > Dear Dr Ray, > > In your manual, it was mentioned that, if we were to have dispatch able load, > then, the load will be represented as negative generator with 0 Pmax and Pmin > with capacity of negative load. As this is intended for DCOPF, it is > sufficient. > > Now, I am interested to run ACOPF and take into consideration load reactive > power demand. > I realize that the manual do explained about this but I do not understand. > Maybe you can help me by responding to the example below: > > Example: > real power demand = 50 Mw > Reactive power demand = 20 Mvar > > The setting for negative generator will be: > Pmax = 0 Pmin = -50 > How about the Qmax and Qmin? > > > Yours sincerely, > > Jiashen Teh > PhD Student > Electrical Energy & Power Systems Group, School of Electrical & Electronic > Engineering > Ferranti Building (B18), The University of Manchester, M13 9PL, United Kingdom > Tel: +44 (0) 161 306 2263; Mobile: +44 (0) 792 322 4864
