Page 308 - Modern Control of DC-Based Power Systems

Index 267

Simple circuit solution methods, 101 Nyquist stability criterion, 52 65
Simulation, 223 online wideband system identification
cascaded system evaluation, 224 233 technique, 65 77
shipboard power system, 233 248 Sontag’s formula, 169
averaged model, 234 240 State estimator/observer, 92
load sharing, 233 234 State feedback, 8, 92, 92f,95
switched converter model, 240 248 State feedback gain matrix, 92 94
Single converter closed loop, 23 26 State variables, 88 89, 94, 106
Single input single output (SISO), 15, 21, State-controllable system, 91
114 115 State-space model, 90, 107 110, 153
Single-generator models, 224 State-space representation, 89 90,
Single-loop Current Mode Control 118 119, 184 185
(CMC), 16 Steady-state error, 30, 36, 180, 229,
Singular value decomposition (SVD), 236 237, 245 246, 260
192 193 Synergetic control, 8, 113, 125 136, 125f,
Sliding mode control (SMC), 8, 204 215, 224 225, 227 228, 233, 236 240
217, 223 application to MVDC system, 129 134
application to DC DC converters, procedure of, 126 128
209 214 simulation results, 135 136
design approach, 205 207 cascaded system, 135
dynamics in the sliding state, 207 209 shipboard power system, 136
proof of robustness, 209 Synergetic Control law, 236
simulation results, 214 215 Synergetic Virtual Disturbance Controller,
cascaded system, 214 215 236
shipboard power system, 215
Small-signal analysis of cascaded systems, T
15 17, 26 28 Takagi Sugeno (TS) multimodel
converter model, 17 26 theory, 7
closed loop, 20 23 Terrestrial DC microgrids, xxviii
open loop, 17 20 Three-Step Impedance Criterion (T-SIC),
single converter closed loop, 23 26 55
linear control design and validation, Transformation matrix method, 93
35 51 Two Degree Of Freedom (2DOF)
network analyzer technique, 49 51 controller, 113, 216
practical PI and PID control design,
36 48
U
load models, 28 35
Unified Impedance Criterion (UIC), 55
constant power load model, 29 33
Unmeasured state variables, estimation of,
first-order lag impedance, 33
87
first-order unstable impedance,
33 34
generalized load impedance, 35 V
nonminimum phase impedance, Variable structure systems (VSSs), xxviii,
34 35 125 126
MVDC system considerations V I-characteristic, 97, 97f
influencing voltage stability, 15 17 Virtual capacity, 6 7
stability analysis, 52 77 Virtual control, 171, 183