Jianqiao Huang

Hi opendss, I want to ask two questions. (1) If branch admittance matrix is a 3 by 3 matrix, like Y12. Is the branch impedance matrix Z12=[Y12]^{-1} (inverse of Y12). Y12={Y12aa Y12ab Y12ac; Y12ba Y12bb Y12bc; Y12ca Y12cb Y12cc} (2) Can I get such branch impedance matrix in OpenDss? Thanks, Jianqiao Huang

Hi, I use opendss through Matlab. I run IEEE 123 node test feeder. I observe the mismatch of AllNodeNames and complex voltages. My commands are as follows, NOD_ID=DSSCircuit.AllNodeNames n2=2nbus; ineven=2:2:n2; inodd=1:2:(n2-1); V =vckt(inodd)+1ivckt(ineven); V(143)/Vbase=-0.5000 - 0.8660i, so it's phase b. But NOD_ID=68.1 Why there is a mismatch here? Thanks, Jianqiao Huang

Hi Roger, You're right. 4 among 5225 loads were defined in wrong voltage rating. It is supposed to be kv=25, but were defined as kv=0.12 mistakenly. It took me a lot of time to find out these 4 loads. But you can point out the problem at the first glance. Thanks, Jianqiao Huang

Hi Opendss, I just run opendss files. When I use load.dss which doesn't have any load data, the voltage of all buses are within [0.93, 1.09]. When I use load1.dss, the voltage is [0.4,1.2]. Almost all the lower voltage are on phase B. Power injection of substation node is as follows, ELEMENT = "Vsource.SOURCE" MAIN_NODE 1 -16754.5 +j -2055.1 16880.1 0.9926 MAIN_NODE 2 -8011.3 +j -10266.3 13022.2 0.6152 MAIN_NODE 3 -5292.1 +j 1387.6 5471.0 -0.9673 TERMINAL TOTAL ................-30057.8 +j -10933.8...

Hi Roger, Thanks very much. Is there a lot of customers (loads) connected to distribution system? What's the topology of secondary network? I searched it, but what I can find is the work in Europe, like Neitherland. I can't find the work in USA. Can you give me keywords or references? (I used as keywords low voltage network, secondary side of distribution system.) Thanks, Jianqiao Huang

Hi OpenDss, I want to mark/plot the secondary nodes of IEEE8500 feeder. I don't want to plot the primary side. Or use different color to represent primary side and secondary side. Is there any such command? Thanks, Jianqiao Huang

Hi Roger, Thanks very much. Both of my questions are solved. (1) I directly ran master file this morning which doesn't have "set maxiterations=20", so it doesn't work. (2) You're right. I just found that LoadXfmrCodes.dss defines the distribution transformers, so LoadXfmrs.dss is not commented out. Thanks very much, Jianqiao Huang

Thanks very much.