Hi Takuya, Your power flow 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 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]
