A Newton solution for 3 coupled nonlinear elements has failed to converge within the iteration limit MAXZNO = 50. 3 {) r/ o' ?. t- W1 DThe current residual is 3.77841495E+02, which exceeds the sloppy convergence tolerance EPSTOP = 1.00000000E-01. The first of ! L9 S A: M! [6 {the coupled, true, nonlinear elements (in order of data input) is located in row 7 of the nonlinear element table, and it 9 [0 |# N1 u3 X# q( N9 lconnects node "X0007C" with node " ". The final coupled element is in row 9, and the matrix rank is 3. Finally, the& @) Z/ {3 L8 {
simulation time is T = 1.08700000E-05. Possible corrective actions include a decrease in the time-step size DELTAT, an increase $ I- |8 P9 Q% g- h6 iin the iteration limit MAXZNO, an increase in the divergence tolerance EPSTOP, and artificial splitting of the subnetwork in 5 W1 z. \4 v4 _1 {. q' j& |2 X4 ]question by distributed-parameter lines (to reduce the number of coupled elements). In addition, it is possible for the user to0 v/ N0 ~- V5 r8 C4 d; [2 C9 l
make a solution impossible by unrealistically limiting the Newton corrections. The user should remember that there can be no u) ~6 [- S/ J' Y3 \solution if his bound on arrester voltage is less than the true solution voltage. The bound has a default value of 1.5 per unit,7 f) m; p' H2 M% }' z9 v f
although it can be changed by a"ZINC OXIDE" special request (columns 57-64, variable ZLIN(2)). Is this parameter involved? The; ~% ^ K0 y" w9 ~. u
number of solution variables that are being limited this way is 0. If this value is positive, think hard about ZLIN(2).