And the last question is [how to use Transformers in MATPOWER?] If there is any explanation related to the above question, could you provide me the explanations?
On 1 March 2017 at 07:54, Abdulgader Alsharif <abdelkaderalsha...@gmail.com> wrote: > Thanks a lot Dr.Ray, > > Indeed, i made a printing mistake while i was writing an email, the > meaning of [reluctance] is (reactance*) is referring to branch reactance. > > But the one thing that i would know is , when i change the values of > reactance what i will get, Do i have to implement the same code?, an > example(0,0.01,0.02,0.03....1) which the changes should be incremental. > > Best wishes. > > On 28 February 2017 at 20:47, Ray Zimmerman <r...@cornell.edu> wrote: > >> [image: Boxbe] <https://www.boxbe.com/overview> This message is eligible >> for Automatic Cleanup! (r...@cornell.edu) Add cleanup rule >> <https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Fkey%3DSy8C1rcnbw%252Ft1f1GMSd9Q2UQ7DPgfvMwQB4x%252BB94c7E%253D%26token%3DDlar1G6Phas%252Bn1AXRB3YxbrynIOm5%252BvF5%252FjAOuZnL%252BtFJ%252FGcNkuDe79c97wrql1McjU8eD01W3hfR9zNO0mf44ITNZxlSUmHe8buDR1J8hZk%252F1%252Bn1Vu2IldXkrqCwNFQ7fHI1zd43TA%253D&tc_serial=29102031072&tc_rand=1966739810&utm_source=stf&utm_medium=email&utm_campaign=ANNO_CLEANUP_ADD&utm_content=001> >> | More info >> <http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=29102031072&tc_rand=1966739810&utm_source=stf&utm_medium=email&utm_campaign=ANNO_CLEANUP_ADD&utm_content=001> >> >> I’m not sure what you mean by “reluctance voltage” and “reactance >> voltage”, but if you are referring to the branch reactance, then setting it >> to zero causes the Ybus matrix to become singular and the power flow fails. >> See the example below. >> >> Ray >> >> >> >> define_constants >> >> mpc = loadcase('case14'); >> >> mpopt = mpoption('out.all', 0); >> >> r = runpf(mpc, mpopt); >> >> MATPOWER Version 6.1-dev, 21-Feb-2017 -- AC Power Flow (Newton) >> >> Newton's method power flow converged in 2 iterations. >> >> sum(real(get_losses(r))) >> >> ans = >> >> 13.3933 >> >> >> mpc.branch(14, BR_X) = 1e-5; >> >> r = runpf(mpc, mpopt); >> >> MATPOWER Version 6.1-dev, 21-Feb-2017 -- AC Power Flow (Newton) >> >> Newton's method power flow converged in 4 iterations. >> >> sum(real(get_losses(r))) >> >> ans = >> >> 13.4047 >> >> >> mpc.branch(14, BR_X) = 0; >> >> r = runpf(mpc, mpopt); >> >> MATPOWER Version 6.1-dev, 21-Feb-2017 -- AC Power Flow (Newton) >> >> Newton's method power flow did not converge in 10 iterations. >> >> sum(real(get_losses(r))) >> >> ans = >> >> NaN >> >> >> >> On Feb 28, 2017, at 12:07 PM, Abdulgader Alsharif < >> abdelkaderalsha...@gmail.com> wrote: >> >> Dear all >> >> I am Master student and a new in MATPOWER, using Matpower to find the >> losses in transmission lines (runpf) and how to change the reluctance >> voltage value in case14 as an example. >> >> Also, to find the daily PV load profile. >> >> Could you please help in writing Matlab code that change the reactance >> voltage values. >> >> I have tried with one but cannot working.. >> >> NOTE: >> (r.branch(14,4)=0) >> when (14,4) is the position of the reactance value that i want to change, >> (0) is the initial changes will be incrementally. >> >> CODE >> for reactance (i) = Branchdata >> r.branch(14,4)=0 >> end >> >> >> Already appreciated ..thanks to all >> >> -- >> ABDULGADER H. ABDULGADER ALSHARIF >> MASTER STUDENT AT ISTANBUL KEMERBURGAZ UNIVERSITY >> LIVE IN ISTANBUL-TURKEY >> Mobile phone Viber & whatsapp no. 00905454567238 <0545%20456%2072%2038>. >> Skype: abdelkader88...@skype.com >> >> >> >> > > > -- > ABDULGADER H. ABDULGADER ALSHARIF > MASTER STUDENT AT ISTANBUL KEMERBURGAZ UNIVERSITY > LIVE IN ISTANBUL-TURKEY > Mobile phone Viber & whatsapp no. 00905454567238 <0545%20456%2072%2038>. > Skype: abdelkader88...@skype.com > -- ABDULGADER H. ABDULGADER ALSHARIF MASTER STUDENT AT ISTANBUL KEMERBURGAZ UNIVERSITY LIVE IN ISTANBUL-TURKEY Mobile phone Viber & whatsapp no. 00905454567238. Skype: abdelkader88...@skype.com
