The ACOPF in MATPOWER minimizes the generation cost subject to voltage, line flow, and capacity constraints. The objective function is not minimization of line losses. Please read the section on Optimal Power Flow in the manual. http://www.pserc.cornell.edu/matpower/manual.pdf
Shri From: Angie Joaqui Rendon <[email protected]> Reply-To: MATPOWER discussion forum <[email protected]> Date: Mon, 5 May 2014 01:26:59 +0000 To: MATPOWER discussion forum <[email protected]> Subject: RE: Reactive Losses Power Flow >| System Summary > | >========================================================================== >====== > >How many? How much? P (MW) Q (MVAr) >--------------------- ------------------- ------------- >----------------- >Buses 9 Total Gen Capacity 820.0 -900.0 to >900.0 >Generators 3 On-line Capacity 820.0 -900.0 to >900.0 >Committed Gens 3 Generation (actual) 320.0 34.9 >Loads 3 Load 315.0 115.0 > Fixed 3 Fixed 315.0 115.0 > Dispatchable 0 Dispatchable -0.0 of -0.0 -0.0 >Shunts 0 Shunt (inj) -0.0 0.0 >Branches 9 Losses (I^2 * Z) 4.95 51.31 >Transformers 0 Branch Charging (inj) - 131.4 >Inter-ties 0 Total Inter-tie Flow 0.0 0.0 >Areas 1 > > >The losses are listed separately, I want to know if OPF's result for the >9 nodes system ($ 5,296.69 / h), includes both losses or only a type of >losses? > > >________________________________________ >From: [email protected] >Subject: Re: Reactive Losses Power Flow >Date: Fri, 2 May 2014 16:26:22 -0400 >To: [email protected] > >Could you clarify the question? > Ray > >On May 2, 2014, at 1:12 PM, Angie Joaqui Rendon <[email protected]> >wrote: > > >Regards >OPF result for the system of nine nodes ($ 5,296.69 / h), it considers >only the missing I^2*Z? > >Thanks > >________________________________________ >Date: Mon, 28 Apr 2014 09:32:01 -0500 >Subject: Re: Reactive Losses Power Flow >From: [email protected] >To: [email protected] > >If your are running ACPF simply change that value and the limits: > >from: > >39 1000 78.4674 300 -100 1.03 100 1 1100 0 >0 0 0 0 0 0 0 0 0 0 > 0; > >to: > >39 500 78.4674 300 -100 1.03 100 1 500 0 >0 0 0 0 0 0 0 0 0 0 > 0; > > >Those 500MW will be generated by the slack bus. > > > > > >2014-04-12 12:53 GMT-05:00 Mahmoud Abdallah ><[email protected]>: > > > dear sir >I use matpower 3.2 > >I use runpf on case 39 and I wish to limit power generated at bus 39 to >certain value how can I do that ? > >first guess for power generated from generator at bus 39 = 1000 MW >I wish to make it generate only 500 MW > >thank you in advance > >Eng. Mahmoud abdallah >Teaching Assistant >Ain Shams University >Faculty of Engineering > >On Friday, April 11, 2014 6:19 AM, Ray Zimmerman <[email protected]> wrote: > >I assume you are referring to the ³System Summary² part of the MATPOWER >output? >========================================================================== >====== >| System Summary > | >========================================================================== >====== > >How many? How much? P (MW) Q (MVAr) >--------------------- ------------------- ------------- >----------------- >Buses 9 Total Gen Capacity 820.0 -900.0 to >900.0 >Generators 3 On-line Capacity 820.0 -900.0 to >900.0 >Committed Gens 3 Generation (actual) 320.0 34.9 >Loads 3 Load 315.0 115.0 > Fixed 3 Fixed 315.0 115.0 > Dispatchable 0 Dispatchable -0.0 of -0.0 -0.0 >Shunts 0 Shunt (inj) -0.0 0.0 >Branches 9 Losses (I^2 * Z) 4.95 51.31 >Transformers 0 Branch Charging (inj) - 131.4 >Inter-ties 0 Total Inter-tie Flow 0.0 0.0 >Areas 1 > > > >If so, please notice that series losses and the branch charging are >listed separately. So the total reactive loss in the line is the series >loss minus the branch charging injection. > > Ray > > >-- >Ray Zimmerman >Senior Research Associate >B30 Warren Hall, Cornell University, Ithaca, NY 14853 >phone: (607) 255-9645 > > > > > > > > >On Apr 10, 2014, at 5:59 PM, Angie Joaqui Rendon <[email protected]> >wrote: > > >Regards > >I am working with the module of power flow, and i want know if the >reactive losses that shows me the program considers the capacitive >effects of the lines?. > >I am comparing results with other malingerers and these do not coincide >with some results that gives me MATPOWER, and differ for the lines that >possess a high capacitive value. > >I appreciate the information that you can give me. > > > > > > > > > > > > > > > > > > > > > > > > > > >
