Hello Matpower friends,
I have a question over similar sign of flows at both nodes of a branch. I have performed PF with PG=0, PD=0 BRANCH_R=0; means total reactive power model (reactive power generation and reactive demand exist) and I got successful convergence. When I observed reactive power flows in branches I got some surprising results in branch field which I would like to share- [ 2 44 0 0.00103 0.1179 501.0822 0 0 0 0 1 -360 360 0 2.53088 0 -14.8590] [ 2 44 0 0.001491 0.16406 501.0822 0 0 0 0 1 -360 360 0 -2.53088 0 -14.6211] So in above two branches (2 to 44) I can understand first branch flow, but in second one both flows (QF and QT) have same negative sign. I didn’t understand why this happened? Is this due to more charging susceptance of second line or what? Another question is how can I estimate MVAr losses in these scenarios? By simply adding both flows in first transmission line gives Q loss = -12.3281 MVAr or by using average power formula >From = sqrt(result.branch(:, 14).^2 + result.branch(:, 15).^2); To = sqrt(result.branch(:, 16).^2 + result.branch(:, 17).^2); Losses = (To + from)./2 = 8.6949 MVAr; ? >From my point of view simple addition will give me MVAr loss value but I’m confused how to calculate MVAr loss in second line? Thanks in advance. Regards Mirish.
