A Newton solution for 3 coupled nonlinear elements has failed to converge within the iteration limit MAXZNO = 50. " Y- R$ d' F1 g# l, Y2 kThe current residual is 3.77841495E+02, which exceeds the sloppy convergence tolerance EPSTOP = 1.00000000E-01. The first of. J a+ f" e; X$ O6 N& G5 s8 o! o
the coupled, true, nonlinear elements (in order of data input) is located in row 7 of the nonlinear element table, and it; E$ b2 _. K3 |! F
connects node "X0007C" with node " ". The final coupled element is in row 9, and the matrix rank is 3. Finally, the& B" e5 d- y0 W
simulation time is T = 1.08700000E-05. Possible corrective actions include a decrease in the time-step size DELTAT, an increase ( C2 W3 b7 s& d% |in the iteration limit MAXZNO, an increase in the divergence tolerance EPSTOP, and artificial splitting of the subnetwork in . o @3 c& M; a9 x0 \, s c$ \question by distributed-parameter lines (to reduce the number of coupled elements). In addition, it is possible for the user to " w- I* ~$ }) R, K Gmake a solution impossible by unrealistically limiting the Newton corrections. The user should remember that there can be no 4 z5 @% F, Q2 {' w! s/ {# Ysolution if his bound on arrester voltage is less than the true solution voltage. The bound has a default value of 1.5 per unit,9 q A$ z3 I4 N& W- I9 X
although it can be changed by a"ZINC OXIDE" special request (columns 57-64, variable ZLIN(2)). Is this parameter involved? The5 F3 y; i# `4 W& [
number of solution variables that are being limited this way is 0. If this value is positive, think hard about ZLIN(2).