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BEGIN NEW DATA CASE
C BENCHMARK DC-32
C Artificial 6-pulse dc power supply that illustrates the simulation of
C diodes. It was concocted in July of 1977 to instruct Hughes Aircraft in
C Fullerton, California (Emory Johnson, Gene Perusse, and assoc.). Use of
C MEMSAV = 1 dumps tables for later restarting and modification (see DC-49).
C It is assumed that STARTUP has KTRPL4 < 0 and L4BYTE = 1 so that a
C C-like ".PL4" file having name DC32.PL4 will be created (used by DC-49).
PRINTED NUMBER WIDTH, 12, 2, { Request maximum precision (for 8 output columns)
.000020 .010
1 1 1 1 1 -1 1 2
5 5 10 10 50 50
C Three 2-winding saturable transformers having unity turns ratios are
C delta-connected on the source side, and grounded-Y on the rectifier
C side. The magnetizing branch is both nonlinear and lossy:
TRANSFORMER .01 .05TRANA 1.E5 1
.01 .05
.02 .06
.05 .07
.15 .08
9999
1GENA GENB .06 .01 115.
2SECA .06 .01 115.
TRANSFORMER TRANA TRANB 1
1GENB GENC
2SECB
TRANSFORMER TRANA TRANC 1
1GENC GENA
2SECC
C Small impedance branches are used (prior to "M34." generalized switch
C logic) to isolate switches from each other at "POLEA". R = 5 ohms.
C Although in theory such isolation is no longer required, do not try
C to remove these 9 resistors, since they provide necessary damping.
C Note that these resistors are not of negligible value:
CATH1 POLEA 5.0
CATH2 POLEA CATH1 POLEA
CATH3 POLEA CATH1 POLEA
C More small impedances used for switch isolation at node "POLEB", and
C also at the transformer secondary. Half the value of "POLEA" is used,
C for balance:
CATH4 SECC 2.5
CATH5 SECA CATH4 SECC
CATH6 SECB CATH4 SECC
AN4 POLEB CATH4 SECC
AN5 POLEB CATH4 SECC
AN6 POLEB CATH4 SECC
C 2-conductor distributed line connects "POLE" with "LOAD". Inductance
C parameters are 5.8 and 1.6 millihenries for the ground and sky modes,
C respectively. Length is five miles. Values are typical for 500 kV line:
-1POLEA LOADA 0.3 5.8 .012 5.0
-2POLEB LOADB .03 1.6 .019 5.0
C Large stray capacitance ties the dc side to ground:
POLEA 100.
POLEB POLEA
C Load on dc side is parallel 200 ohm R and 100 microfarad capacitance:
LOADA LOADB 200.
LOADA LOADB 100.
C One-ohm grounding resistance, for later fault (see DC-49 continuation).
LOADA FAULT 1.0
C 20 August 1998, discovery that Pi-circuits are mishandled leads to addition
C of the following radial branch off the generator (does not change answers):
1GENA 1-A 34.372457.68.15781
2GENB 1-B 35.735164.43-.031538.002451.79.16587
3GENC 1-C 35.735164.43-.031537.455151.72-.021938.002451.79.16587
BLANK card ending all branch cards
C First switch is to be the fault switch (open here, and closed in DC-49):
FAULT 1.0 2.0
C Bridge circuit consisting of 6 uncontrolled valves (i.e., diodes). Those
C numbered 1, 2, and 3 feed "POLEA", making it positive with respect to
C ground. Diodes 4, 5, and 6 feed "POLEB", making it negative.
11SECB CATH1 13
11SECA CATH2 CLOSED 13
C The following card serves to name the switch following it. To see the
C results of this activity, interactively execute the "SWITCH" command of
C SPY, sending "EXTRA" for the alternative table. Another point: note
C the exclamation point, which is needed to hold lower case within A6 name
C (assuming KINSEN = 1 within STARTUP). No such control for valve six.
NAME: Valve3 ! { Request "NAME: " of cols. 3-8 precedes A6 valve name in 9-14
11SECC CATH3 13
11AN4 CATH4 CLOSED 13
11AN5 CATH5 13
NAME: Valve6 { Request "NAME: " of columns 3-8 precedes A6 valve name in 9-14
11AN6 CATH6 CLOSED 13
BLANK card terminating the last switch card
C Balanced 3-phase source of 400 Hz is connected to transformer delta side:
14GENA 93.897 400. -30. -1.
14GENB 93.897 400. -150. -1.
14GENC 93.897 400. 90. -1.
BLANK card ending all source cards
1 { Request for all node voltage outputs
PRINTER PLOT
144 1. 0.0 10. LOADA LOADB { Axis limits: (-1.637, 1.618)
$WIDTH, 79, { Narrow output width will save paper from here on (summary stats)
BLANK card ending the last plot cards
BEGIN NEW DATA CASE
BLANK
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