IEEE PSAP PTI data format

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Partial Description of the IEEE Common Data Format for the   
Exchange of Solved Load Flow Data
5 @& @, W% c0 W/ B: K* {6 ~The complete description can be found in the paper "Common Data
+ B* U; b, Q$ z( D3 S2 u" lFormat for the Exchange of Solved Load Flow Data", Working Group on a
Common Format for the Exchange of Solved Load Flow Data, _IEEE
Transactions on Power Apparatus and Systems_, Vol. PAS-92, No. 6,
9 W& r, h7 h+ S0 yNovember/December 1973, pp. 1916-1925.
' i9 w8 t2 v% O- N! MThe data file has lines of up to 128 characters. The lines are grouped
into sections with section headers. Data items are entered in specific
) I/ w* s4 U, ?2 `1 Wcolumns. No blank items are allowed, enter zeros instead. Floating point
) u# k3 N2 T- s$ W) T( ~items should have explicit decimal point. No implicit decimal points
are used.
& }" v" B) b# [; ?; i' tData type codes: A - Alphanumeric (no special characters)
7 m2 M( ?2 y# T' S% x5 }9 z0 J- \                 I - Integer
                 F - Floating point
/ R# h2 ]( p4 n6 I( S, }) q( j3 x2 C                 * - Mandatory item
Title Data
==========
' O1 G, a8 q; k, H8 F  A  ~First card in file.
Columns  2- 9   Date, in format DD/MM/YY with leading zeros. If no date
# W$ a3 \1 E$ |& ~! d5 D                provided, use 0b/0b/0b where b is blank.
Columns 11-30   Originator's name (A)
+ _+ j3 \3 a$ p2 V7 CColumns 32-37   MVA Base (F*)
Columns 39-42   Year (I)
+ I8 q+ Z' `4 wColumn  44      Season (S - Summer, W - Winter)
1 m' q! ?# }$ H- f  xColumn  46-73   Case identification (A)
+ W+ W9 U7 g1 ]9 GBus Data *
2 S& a. T% Y, C9 O9 F2 n2 X==========
Section start card *:
---------------------
Columns  1-16   BUS DATA FOLLOWS (not clear that any more than BUS in
; a2 d) @! @$ e# F/ O7 k+ P* H# g                1-3 is significant) *
) _5 p) _+ `+ z% o. vColumns  ?- ?   NNNNN ITEMS (column not clear, I would not count on this)
: r6 v; s& S! x0 E# A1 EBus data cards *:
-----------------
Columns  1- 4   Bus number (I) *
Columns  7-17   Name (A) (left justify) *
Columns 19-20   Load flow area number (I) Don't use zero! *
Columns 21-23   Loss zone number (I)
Columns 25-26   Type (I) *
* O6 I/ d- p+ L& o0 z% I# {$ `' E# f                 0 - Unregulated (load, PQ)
                 1 - Hold MVAR generation within voltage limits, (PQ)
                 2 - Hold voltage within VAR limits (gen, PV)
! _  s# d0 [1 f                 3 - Hold voltage and angle (swing, V-Theta) (must always
                      have one)
Columns 28-33   Final voltage, p.u. (F) *
Columns 34-40   Final angle, degrees (F) *
Columns 41-49   Load MW (F) *
Columns 50-59   Load MVAR (F) *
$ c( u' o' t0 W& A2 mColumns 60-67   Generation MW (F) *
Columns 68-75   Generation MVAR (F) *
Columns 77-83   Base KV (F)
* A5 C0 X% p3 D. X0 R9 \Columns 85-90   Desired volts (pu) (F) (This is desired remote voltage if
                this bus is controlling another bus.
% i1 C( C) @+ s1 Q; U9 _Columns 91-98   Maximum MVAR or voltage limit (F)
Columns 99-106  Minimum MVAR or voltage limit (F)
4 w/ B2 @8 V4 q5 @8 _9 yColumns 107-114 Shunt conductance G (per unit) (F) *
Columns 115-122 Shunt susceptance B (per unit) (F) *
9 l: _6 A' m6 t1 W0 A/ u! e9 ^  a3 fColumns 124-127 Remote controlled bus number
4 r6 x2 A. u% M/ b) C; pSection end card:
+ {7 E* q# D9 f; c' w-----------------
1 v1 K1 {: |# S, eColumns  1- 4   -999
! B) g; M& R: \2 ~/ f/ T! \- |Branch Data *
=============
5 r8 L. N. K: I  T3 x% [Section start card *:
---------------------
Columns  1-16   BRANCH DATA FOLLOWS (not clear that any more than BRANCH
2 j3 p8 @! d7 w  J! Q                is significant) *
Columns 40?- ?  NNNNN ITEMS (column not clear, I would not count on this)
* [$ P; e( k0 Z+ q% TBranch data cards *:
1 _7 }% B' V7 d6 N+ e8 w--------------------
& B3 I+ g4 Q9 N, |) nColumns  1- 4   Tap bus number (I) *
! ~8 u; \7 Y5 N  a/ u* I                 For transformers or phase shifters, the side of the model
                 the non-unity tap is on
# @0 b( Y5 g% @3 eColumns  6- 9   Z bus number (I) *
                 For transformers and phase shifters, the side of the model
) k+ w2 y1 `% T8 t  G4 y/ [                 the device impedance is on.
$ ~- Y' `. Y; D" @& W8 eColumns 11-12   Load flow area (I)
Columns 13-14   Loss zone (I)
Column  17      Circuit (I) * (Use 1 for single lines)
Column  19      Type (I) *
                 0 - Transmission line
# C9 Q2 }/ H* q( [$ X& b: @                 1 - Fixed tap
                 2 - Variable tap for voltage control (TCUL, LTC)
7 e# X( m# X6 f2 A7 ]) d                 3 - Variable tap (turns ratio) for MVAR control
1 u) q1 f" P1 S                 4 - Variable phase angle for MW control (phase shifter)
Columns 20-29   Branch resistance R, per unit (F) *
Columns 30-40   Branch reactance X, per unit (F) * No zero impedance lines
- c  D* ]2 y3 ]% l) s8 jColumns 41-50   Line charging B, per unit (F) * (total line charging, +B)
Columns 51-55   Line MVA rating No 1 (I) Left justify!
$ F3 {9 D0 E$ i" I6 o# b! [Columns 57-61   Line MVA rating No 2 (I) Left justify!
Columns 63-67   Line MVA rating No 3 (I) Left justify!
Columns 69-72   Control bus number
Column  74      Side (I)
                 0 - Controlled bus is one of the terminals
                 1 - Controlled bus is near the tap side
                 2 - Controlled bus is near the impedance side (Z bus)
9 _, v+ |2 y( FColumns 77-82   Transformer final turns ratio (F)
- n( V6 v" @4 @4 l5 F( G! ?: QColumns 84-90   Transformer (phase shifter) final angle (F)
Columns 91-97   Minimum tap or phase shift (F)
Columns 98-104  Maximum tap or phase shift (F)
Columns 106-111 Step size (F)
Columns 113-119 Minimum voltage, MVAR or MW limit (F)
' g! _# h5 p3 }: `; K/ M  jColumns 120-126 Maximum voltage, MVAR or MW limit (F)
Section end card:
-----------------
Columns  1- 4   -999
Loss Zone Data
) K5 K: M2 }- w  y; R' s. D==============
Section start card
$ @: o& Q/ h8 R------------------
: z2 E' J1 A9 O# ^! I' @Columns  1-16   LOSS ZONES FOLLOWS (not clear that any more than LOSS
  Y& o* M) N  t4 w$ t                is significant)
Columns 40?- ?  NNNNN ITEMS (column not clear, I would not count on this)
Loss Zone Cards:
5 O* g8 A0 f: o5 q' t----------------
Columns  1- 3   Loss zone number  (I)
% l( j0 g) l2 v2 O+ y4 OColumns  5-16   Loss zone name (A)
, P) p3 g7 l" wSection end card:
7 d1 k2 Z- t& r-----------------
Columns  1- 3   -99
# F0 U0 p8 L$ NInterchange Data *
( K# h- p1 g- e* s( F==================
) T8 R8 F, F  ~$ SSection start card
------------------
Columns  1-16   INTERCHANGE DATA FOLLOWS (not clear that any more than
                first word is significant).
. ]  F( x0 x2 ]0 E# U5 @9 y& QColumns 40?- ?  NNNNN ITEMS (column not clear, I would not count on this)
Interchange Data Cards *:
4 u% z$ L( T3 W& ~! W-------------------------
Columns  1- 2   Area number (I) no zeros! *
9 f$ I3 V2 h. L( T. tColumns  4- 7   Interchange slack bus number (I) *
/ W5 c$ \, [( M# S5 g" F5 sColumns  9-20   Alternate swing bus name (A)
$ ]) N. j$ i: Q1 L3 r6 J. gColumns 21-28   Area interchange export, MW (F) (+ = out) *
Columns 30-35   Area interchange tolerance, MW (F) *
Columns 38-43   Area code (abbreviated name) (A) *
Columns 46-75   Area name (A)
Section end card:
-----------------
4 m  p$ Z" c" oColumns  1- 2   -9
, q! w# m4 [, ?' s/ q5 }4 ZTie Line Data
# s9 D# n5 Q! O) |! J/ I2 K$ {=============
Section start card
------------------
( x$ T# b& u" a9 J) r. n9 A6 xColumns  1-16   TIE LINES FOLLOW (not clear that any more than TIE
                is significant)
4 d& O& z1 @! y3 ~Columns 40?- ?  NNNNN ITEMS (column not clear, I would not count on this)
Tie Line Cards:
( S3 L# T$ o6 W0 T, K---------------
Columns  1- 4   Metered bus number (I)
9 {. e. b' `+ e" P  lColumns  7-8    Metered area number (I)
Columns  11-14  Non-metered bus number (I)
Columns  17-18  Non-metered area number (I)
Column   21     Circuit number
' W8 T0 ^& L6 _6 T1 D+ CSection end card:
-----------------
3 f1 I  z+ D3 C0 t& X1 ?) _  e. mColumns  1- 3   -999
END OF DATA

+ F2 h( a* l- Y3 B6 V2 S: T0 ZPSAP File Format
! a3 g9 s7 g* E1 vMay 20, 1993
The PECO PSAP File Format is fully described in the _PJM Power System
5 M* a3 X7 d! e* {1 EAnalysis Package Use's Guide_, available from the Philadelphia
+ M) ]# e: F* E; {+ vElectric Company. The following is a rough description of the
most important parts of the format.
A PSAP data file is divided into sections by code cards. The code is
in the first three columns. There are something like 60 codes, of
- r6 m3 G. `  w( F3 uwhich only four are described in this document.
The 1 code indicates that the next card is the case title. Only one
title is allowed per case.
5 g+ f& M2 K8 HThe 4 card indicates that line data follows. The line data ends with
a 9999 card.
" q6 I9 t% H9 }$ pThe 5 card indicates that bus data follows. The bus data ends with
a 9999 card.
The 15 card indicates that area interchange data follows. The data ends with
8 H. G+ q" A+ U) ca 9999 card.
Line Data Card (Code 4 cards)
* F; c: y* _: B=============================
7 g( S% R9 i4 @* V0 {' Y  |Cols    Data
1-4     From bus number
, a6 O) ~6 s% I; V- S# o. }. g6       Change code (blank in 4 section)
4 M+ ^! U( |7 U2 [9 R& g7 o7       'C' if second card present for same line. Used for transformers.
6 f* @% V' P' Y9 v0 k9-12    To bus number
14      Circuit number (blank in 4 section)
4 n9 R, _3 a. X( P9 R6 L* j0 D16      'T' or 'F' - Load flow area of bus at this end of line gets losses.
18-23   Line resistance in percent of base. (NOT per unit.)
        (percent = 100 x per unit) Two default decimal places.
: c( Y4 w: }+ d: }" n9 w% x5 W24-29   Line reactance, in percent. Two default decimal places.
) w' Q; |/ z7 O: D, t30-35   Line charging MVAR (total). Three default decimal places.
36-40   Transformer tap (per unit turns ratio). Three default decimal
' ~; ?' t/ a- x! C  L        places, 1000 = 1.000.
41-45   Min tap, for OLTC. Three default decimal places.
/ f0 H7 v; A0 j/ ?46-50   Max tap, for OLTC. Three default decimal places.
51-55   Phase shift angle, for OL phase shifter. Two default decimal places.
56-60   Remote voltage control bus number. Negative if lower tap increases
        voltage of this bus.
' @" N$ [0 v8 J61-64   Normal MVA rating
2 \+ Y/ Y- j$ L. f65-68   Emergency MVA rating
: X( A' B: ]/ F' d! J3 H69-72   MVA Base. Default value 100 MVA if blank.
5 M6 J5 @' ~# Z* wSecond Line Card (follows 'C' in first card)
============================================
, L% Z: g) g/ T8 H: ]" n+ _1-17    Same as first card, except no 'C'. Can be left blank.
/ V  ?! l' \- u3 R35-40   Desired MVAR flow or Min voltage setpoint for OLTC.
41-45   Min phase shifter degrees. Two default decimal places.
5 H6 I8 d9 ]5 _0 L: l9 [, k46-50   Max phase shifter degrees. Two default decimal places.
: C' Q6 u' f4 _9 i6 J0 p51-55   Desired MW flow for phase shifter.
57-60   Controlled line from bus.
8 l: e7 e4 h) x8 i8 c. E5 |# x- O  J62-65   Controlled line to bus.
67-70   Available taps (number of taps)
0 E) h5 F8 ~" Y' w3 K: h1 `71-75   Maximum voltage setpoint. Three default decimal places.
Bus Cards (Code 5 cards)
/ r3 a: a# S+ f+ b& X+ s* K! c: V& K========================
1-4     Bus number
6       Change code (blank in 5 section)
! _; j2 ^; t  z" Z3 Y7       Continue code (blank in 5 section)
; d: E. Y& `- ?8       Regulated bus code:
         Blank - load (PQ) bus
/ L* J% y7 @! O% V, }         1     - gen (PV) bus
         2     - swing (V-Theta) bus
  ]' ?! B3 A* w2 O10-21   Name
6 y" [/ n' U, O7 \23-26   Bus voltage (control setpoint or solved value).
        Three default decimal places.
$ z7 ^% ?& t3 m5 u' @# J27-30   Bus angle
, b8 P* B5 ], m8 f0 o: R5 O( b+ N0 K31-35   Generation MW
36-40   Generation MVAR (from solution)
$ S7 s: r6 m* W1 c0 I41-45   Generation MVAR low limit
) m1 N6 R, Z0 P+ t46-50   Generation MVAR high limit
; E: b1 L. k5 N4 |7 d51-55   Bus at which generation controls voltage
/ c) L' b4 J, I3 B9 z  l56-60   Load MW
61-65   Load MVAR
9 V+ l9 q  A0 u4 ?  I2 g2 ~66-70   Shunt MVAR. Reactors are minus.
/ R/ i! l3 L7 B) {: S$ {71-72   Load flow area. (Used for area interchange and losses).
7 U* @2 j: m  b6 Q3 `! ?( zArea Interchange Cards (Code 15 cards)
; H6 @$ |0 y2 K9 w  f======================================
* W4 U/ |: k7 F8 {& L/ e& m3-4     Load flow area number
5-8     Swing bus for area interchange. Adjusts generation at this bus
- O+ n3 k- J- Z$ W# D$ E        to meet area interchange requirement.
9-14    Area exports, MW. (+ = out of area)
  ~6 D( n  T! C/ j0 L+ c15-19   Area Interchange tolerance, MW
, E8 N( E" t7 j. f$ J8 w20-55   Area name
) {1 q( p, ~( O% d: y0 d$ ]! e; J56-60   Area load (usually left blank)
- v& Z1 Q& y: F0 r$ |3 f1 o61-65   Area losses (usually left blank)
, Z* M  j. x7 \& F

6 z3 V2 w( D) }) h
: X8 a/ Q0 Q% r* eDescription of the PTI Load Flow Data Format
============================================
% w7 N; l) r, D2 qNote that PTI reserves the right to change the format at any time.
For use with the IEEE 300 bus test case in PTI format.
) o- m( T9 ^0 kCase Identification Data
9 \. f- C5 Y: [7 b, O9 d; Q- ^========================
- u, ?) @% @  m+ L; ^# `  pFirst record: IC,SBASE
1 S" J) G! j- w. F/ P' [3 Z8 G IC - 0 for base case, 1 for change data to be added
! S" ^8 d) o8 C3 g% m$ p) p SBASE - System MVA base
Records 2 and 3 - two lines of heading, up to 60 characters per line
: u. C  l( C2 _( G4 uBus Data
========
8 S0 K6 b9 k% r$ K$ a& }4 aBus data records, terminated by a record with a bus number of zero.
. A1 h4 a: L. W- ?' {* y8 gI,IDE,PL,QL,GL,BL,IA,VM,VA,'NAME',BASKL,ZONE
I - Bus number (1 to 29997)
IDE - Bus type
        1 - Load bus (no generation)
% x6 u9 M. c( G+ g; }: x        2 - Generator or plant bus
2 N/ T& n  u5 O5 F: Z1 y        3 - Swing bus
6 u- Z. A: R( C        4 - Islolated bus
PL - Load MW
QL - Load MVAR
- ]2 M4 m3 a. ?* t; G GL - Shunt conductance, MW at 1.0 per unit voltage
8 g+ m" I3 S/ ]$ s' O+ m1 \2 U BL - Shunt susceptance, MVAR at 1.0 per unit voltage. (- = reactor)
IA - Area number, 1-100
VM - Voltage magnitude, per unit
VA - Voltage angle, degrees
% L3 G2 `( x; f5 ^ NAME - Bus name, 8 characters, must be enclosed in quotes
BASKV - Base voltage, KV
ZONE - Loss zone, 1-999
Generator Data
# q2 k" M) Y1 d1 Q7 d: l+ D" h' }==============
' U+ T/ s" j' i9 k0 wGenerator data records, terminated by a generator with an index of zero.
I,ID,PG,QG,QT,QB,VS,IREG,MBASE,ZR,ZX,RT,XT,GTAP,STAT,RMPCT,PT,PB
5 ?& Z, o$ J  f1 t- q' hI - Bus number
( @0 R/ W1 ~0 P9 G2 @9 xID - Machine identifier (0-9, A-Z)
PG - MW output
6 L" I/ p9 r' ^3 gQG - MVAR output
* _% P3 c2 ^9 mQT - Max MVAR
QB - Min MVAR
- x' U: x! G4 Q* Y# ~VS - Voltage setpoint
) E. i3 O8 h# W7 AIREG - Remote controlled bus index (must be type 1), zero to control own
voltage, and must be zero for gen at swing bus
MBASE - Total MVA base of this machine (or machines), defaults to system
MVA base.
ZR,ZX - Machine impedance, pu on MBASE
RT,XT - Step up transformer impedance, p.u. on MBASE
GTAP - Step up transformer off nominal turns ratio
5 M. J0 y  d5 v# v9 XSTAT - Machine status, 1 in service, 0 out of service
RMPCT - Percent of total VARS required to hold voltage at bus IREG
4 V+ j# W: H7 {4 ~$ b; O to come from bus I - for remote buses controlled by several generators
PT - Max MW
! ~' `, e7 t+ Z6 YPB - Min MW
4 [! N6 U  g$ C( xBranch Data
===========
Branch records, ending with a record with from bus of zero
I,J,CKT,R,X,B,RATEA,RATEB,RATEC,RATIO,ANGLE,GI,BI,GJ,BJ,ST
I - From bus number
J - To bus number
( F) D' H! U" _# w$ o& g% W8 sCKT - Circuit identifier (two character) not clear if integer or alpha
R - Resistance, per unit
4 i: d* W1 O3 n: MX - Reactance, per unit
B - Total line charging, per unit
  p' ~4 u; D( Q" {' b) d4 pRATEA - MVA rating A
RATEB, RATEC - Higher MVA ratings
RATIO - Transformer off nominal turns ratio
ANGLE - Transformer phase shift angle
3 O5 _. n9 h- T' s" dGI,BI - Line shunt complex admittance for shunt at from end (I) bus, pu.
GJ,BJ - Line shunt complex admittance for shunt at to end (J) bus, pu.
ST - Initial branch status, 1 - in service, 0 - out of service
% s- H# D* J2 X* UTransformer Adjustment Data
===========================
5 ^0 V6 }1 H, R7 z6 TEnds with record with from bus of zero
I,J,CKT,ICONT,RMA,RMI,VMA,VMI,STEP,TABLE
I - From bus number
J - To bus number
CKT - Circuit number
- g/ ^& I9 j8 l7 P6 VICONT - Number of bus to control. If different from I or J, sign of ICONT
determines control. Positive sign, close to impedance (untapped) bus
1 Z: V" }5 ~2 m, E* R3 [2 S of transformer. Negative sign, opposite.
RMA - Upper limit of turns ratio or phase shift
& D& s+ B9 I3 K3 p; i8 m- q: XRMI - Lower limit of turns ratio or phase shift
' O: ~  [% ]/ ^% D9 \7 h: hVMA - Upper limit of controlled volts, MW or MVAR
- S& O9 ]5 _' bVMI - Lower limit of controlled volts, MW or MVAR
6 N/ T! J/ X$ v" t8 ~! vSTEP - Turns ratio step increment
TABLE - Zero, or number of a transformer impedance correction table 1-5
3 ^5 }5 m! ~+ C. b# l/ eArea Interchange Data
$ {% b: Q% w# F( \( O2 Z: Q=====================
Ends with I of zero
I,ISW,PDES,PTOL,'ARNAM'
. w, G4 V. U& L6 s" ^' s. H! a' vI - Area number (1-100)
ISW - Area interchange slack bus number
PDES - Desired net interchange, MW + = out.
PTOL - Area interchange tolerance, MW
ARNAM - Area name, 8 characters, enclosed in single quotes.
% Q8 U) ?5 o4 _& @- w& h/ z0 q8 HDC Line Data
============
1 J9 l' ~2 x! v  qEnds with I of zero
; u$ J# [! g" P% O! QEach DC line has three consecutive records
I,MDC,RDC,SETVL,VSCHD,VCMOD,RCOMP,DELTI,METER
IPR,NBR,ALFMAX,ALFMN,RCR,XCR,EBASR,TRR,TAPR,TPMXR,TPMNR,TSTPR
) G. Y" w8 l7 o, n/ p. Q0 SIPI,NBI,GAMMX,GAMMN,RCI,XCI,EBASI,TRI,TAPI,TPMXI,TPMNI,TSTPI
7 ~: Q6 ~8 u  t3 b2 `I - DC Line number
6 o$ E- \8 r- j( }# ?MDC - Control mode 0 - blocked 1 - power 2 - current
RDC - Resistance, ohms
SETVL - Current or power demand
& M0 `6 a% Q9 d- H; V% f6 G  F5 RVSCHD - Scheduled compunded DC voltage, KV
3 v7 [4 N& k4 H1 v. SVCMOD - Mode switch DC voltage, KV, switch to current control mode below this
/ w% ^2 Z+ i6 S7 }  J* Z! HRCOMP - Compounding resistance, ohms
( P% s* z0 W4 w3 e2 zDELTI - Current margin, per unit of desired current
- L2 X0 Z# n; r' y! a$ pMETER - Metered end code, R - rectifier I - Inverter
: |& n$ N7 B0 h3 n/ o2 ?! @+ m( ^. z" YIPR - Rectifier converter bus number
NBR - Number of birdges is series rectifier
ALFMAX - Maximum rectifier firing angle, degrees
" v, e. v& m1 M, z- y) BALFMN - Minimum rectifier firing angle, degrees
9 _  ]5 J" S' D% Y5 c) dRCR - Rectifier commutating transformer resistance, per bridge, ohms
XCR - Rectifier commutating transformer reactance, per bridge, ohms
EBASR - Rectifier primary base AC volts, KV
) e" m9 J  {& i8 {TRR - Rectifier transformer ratio
TAPR - Rectifier tap setting
' T: w& l. m, x7 f" m  O) z) i0 l) K9 JTPMXR - Maximum rectifier tap setting
# a7 w0 h* B& l( }TPMNR - Minimum rectifier tap setting
TSTPR - Rectifier tap step
Third record contains inverter quantities corresponding to rectifier
quantities above.
# L# l* @: k8 h7 mSwitch Shunt Data
, q  P4 n/ C) [; N1 s- _=================
$ ~: [1 w6 w$ B1 N6 `Ends with I = 0.
! Y4 u! ?% J) _7 ?I,MODSW,VSWHI,VSWLO,SWREM,BINIT,N1,B1,N2,B2...N8,B8
I - Bus number
MODSW - Mode 0 - fixed 1 - discrete 2 - continuous
; \# y" }) I+ l% T$ @VSWHI - Desired voltage upper limit, per unit
: K/ ^1 ]  g% tVSWLO - Desired voltage lower limit, per unit
- n% `$ r# _* x- i7 _1 r6 XSWREM - Number of remote bus to control. 0 to control own bus.
" j3 ?/ A/ p( I6 C" [" ^VDES - Desired voltage setpoint, per unit
2 U3 L+ ^# G4 C5 s; v( ?BINIT - Initial switched shunt admittance, MVAR at 1.0 per unit volts
/ c5 M5 c% [$ B4 lN1 - Number of steps for block 1, first 0 is end of blocks
B1 - Admittance increment of block 1 in MVAR at 1.0 per unit volts.
N2, B2, etc, as N1, B1

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