A Newton solution for 3 coupled nonlinear elements has failed to converge within the iteration limit MAXZNO = 50. : R4 Y. E9 s9 ?$ n, pThe current residual is 3.77841495E+02, which exceeds the sloppy convergence tolerance EPSTOP = 1.00000000E-01. The first of 6 Y' d8 t' q" _% ~8 u2 Gthe coupled, true, nonlinear elements (in order of data input) is located in row 7 of the nonlinear element table, and it! Q0 {3 P" v/ ~, R1 n* C0 b
connects node "X0007C" with node " ". The final coupled element is in row 9, and the matrix rank is 3. Finally, the $ r' ^! d m U$ [/ Xsimulation time is T = 1.08700000E-05. Possible corrective actions include a decrease in the time-step size DELTAT, an increase* Z) S- \1 V0 ?7 j0 O
in the iteration limit MAXZNO, an increase in the divergence tolerance EPSTOP, and artificial splitting of the subnetwork in 7 `0 Y# W) H q0 d5 U* k% Xquestion by distributed-parameter lines (to reduce the number of coupled elements). In addition, it is possible for the user to ! }4 ?/ f8 I8 T, \% D1 Fmake a solution impossible by unrealistically limiting the Newton corrections. The user should remember that there can be no " A. f/ x2 G# O3 H$ T. ^6 r6 Rsolution if his bound on arrester voltage is less than the true solution voltage. The bound has a default value of 1.5 per unit,6 Q7 I# G( a2 [# ^7 U
although it can be changed by a"ZINC OXIDE" special request (columns 57-64, variable ZLIN(2)). Is this parameter involved? The 3 M) @/ ]; R6 n) bnumber of solution variables that are being limited this way is 0. If this value is positive, think hard about ZLIN(2).
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发表于 2015-4-29 20:50:20
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