Stevenson J. Power system analysis

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ABCD constants, 201

in circle-diagram equations, 216, 217

for networks (table), 753

in power-ow equations, 215

Acceleration factors, 339

Admittance:

branch, 240

driving point, 32

equivalent admittance, network,

251-255

mutual admittance, of nodes, 32

;IS dat<I in power-Ilow sdies, 329,

337

measurement of, 285

primitive, 240, 246

self-admittance, of nodes, 32

as data in power-ow studies, 329,

337

measurement of, 285

transfer, 32

Admittance matr (see Bus

admittance matrix)

Alternating-current (ac) circuits:

balanced three-phase, 14-25

double-subscript notation for,

4-5

INDEX

Alternating-current (Cant.)

power in balanced three-phase,

24-25

power in single-phase, 5-10

single-subscript notation for, 3-4

Alternator (see Synchronous machine)

American ational Standards Institute

(ANSI):

graphical symbols for diagrams,

34-36

guide for circuit-breaker

;lpplic;ltions, 404-405

Area con trol, 566-572

error (ACE), 562

frequency change, 564-566, 570

time error, 568, 572

Armature reaction, 98

,

100, 107

Attenuation constant, 205

Autorratic generation control (AGC),

532, 562-568

Autotransformers, 71-72

B coecients, 547-548

I

calculation of (example), 548-551

777

778

INDEX

B coecients (Cont.)

comparison with power ow,

551-552

matrix of, 547-548

Back substitution, 264, 266-267

Branch admittances, 240, 246, 250

Branch equations, 240

Branch impedances, 240, 245, 250

Building block matrix, for

Y

b!I"

33

,

242

Bundled conductors, 164

capacitive reactance of, 1 K()-I KK

inductive reactance of, I h4-1 h)

Bus admittance e q ua tions, solution or,

263-271

Bus admittance matrix:

building-block formation of, 33,

242-251

denition of, 32

formation rules, 32

formation using A, 261-263

measurement of element valu es, 285

modication of, 255-257

mutual coupling in, 245-251

Bus impedance matrix:

calculating clements of, 300-310

changing reference of, 313-316

denition of, 284

Jriving-oinl il1lpcu(l

I

1CCS ur, 2K4

measurement of, 2K6

equivalen t network I'm thrce-phase

faults, 395-402

equ

ivale nt network fo r

unsymmetrical fa ul ts, 524-525

forma tion of, 301-305

mutual coupling in, 316-322

modication of, 294-2

negative-sequence, 471-472

positive-sequence, 471-472

power-invariant transformations

with, 310-312

transfer impedances of, 284

measurement of, 287

in three-phase fault analysis,

390-395

Bus impeuance matrix (CUllf.)

in unsymmetrical fault analysis,

470-527

zero-sequence, 471-472

Buses, denition of. 259

Capacitance:

calculation by modified ge ome t ric

me�ln distance, I Ko-100

delinition. 142, 17()

�lnd earth. 1�3- 1�

10 IlCllILli. 175

and nonulldorm charge u

i

stribution.

175

of p arallcl circuit three-ph ase lines .

188-190

and stranded conductors, 176

summary of calcula t ions, 191

of three-phase lines with equivalent

spacing, 177 -ISO

of three-phase lines with

unsymmetrical spacing,

1S0- 183

transposition to halancc. 180- 182

of two-wire lines. 173-176

(See also Reactance)

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