Thanks for reply, Idris. I'm sorry for replying to be late. Today, I'll try column 3 and 4.
Before trying these, is base MVA 0.01MVA? In journal which I read, here is base KVA = 10KVA, so I rewrite 0.01MVA. After trying clumun 3,4 ,I report to you. Takauya Koyanagi [email protected] ----- Original Message ----- > Hi Takuya, > Your power did not converged because the line parameters (R and X)you entered in column 3 and 4 of the branch matrix (mpc.branch) are in ohms instead of p.u. > > Solution: > 1. Select the right base MVA; 10MVA for an example > 2. the operating voltage of the network is 12.66KV. this should be your base KV > 3. Calculate the your base impedance based on 1 & 2 above > 4. compute the equivalent per unit impedances for the R and X in column 3 and 4 respectively > Then run your load flow again. It should converge. > On the alternative, add the expression below before the bus matrix ( mpc.bus) > > mpc.baseMVA = 10; > mpc.baseKVA = 12.66; > Baseimpedance=(mpc.baseKVA)^2/mpc.baseMVA; > > Then after the branch matrix (mpc.branch) add > > mpc.branch(:,3:4)=mpc.branch(:,3:4)/Baseimpedance; > > Then run your load flow again. It should converge. > > Idris > >-----Original Message----- > >From: [email protected] [mailto:bounce- > >[email protected]] On Behalf Of ???? > >Sent: 12 September 2013 11:02 > >To: [email protected] > >Subject: 69 bus distribution system > > > >I want 69 bus distribution system, so I make that. > > > >I collect 69 bus distribution datas. I referred to journal of attachment. > > > >I modify 'case_ieee30', and input branch and bus datas of 69 bus > >distribution system. > > > >After makeing 69 distribution system, I implement 'runpf'. But 'runpf ' > >didn't converged. > > > >I attach 69 distribution system which I made. What is wrong? > > > >If 69 distribution system will be completed, let's use it together. > > > >So I want advise. Please lend me your strength. > > > >Takuya Koyanagi > >[email protected] > > >
