Page 407 - Renewable Energy Devices and System with Simulations in MATLAB and ANSYS

394 Index

single-machine infinite-bus model, 34–35 rotor voltages, 219
synchronous machine parameters, 34–35 stator active and reactive powers, 219
Constant-voltage and constant-current MPPT in synchronous coordinates, 218
methods, 97 three-phase short circuit, 219, 221
Converter and electrical control models electric active power, 214
DFIG control, 197 with slip rings, 214
generator-side converter and control, 197–198 small wind energy systems, 153–154
grid-side converter and control, 198–199 stator frequency, 213–214
PMSM control, 197 subsynchronous mode of operation, 214
CPV technology, see Concentrated photovoltaic supersynchronous mode of operation, 214
technology technological attempts, 215
CRIGs, see Cage rotor induction generators topology and circuit model
CSP technology, see Concentrated solar power equivalent circuit, 215–216
technology flux/current relationships, 216–217
Current energy conversion (CEC) generator, 269, laminated stator and rotor slotting, 215–216
273–274, 281; see also Marine and hydrokinetic phase turns ratio, 215
generation and power plants stator current, 217
output power and rotational speed, 286–287 Dual active bridge (DAB) topology, 339
performance coefficient, 285
TSR, 285–286 E
water turbine, hydrokinetic power of, 284
Electric vehicle (EV) charging station
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D MATLAB /Simulink model, 343–344
schematics, 343
DC converter modules, 382 simulation results, 343, 345
DC-excited synchronous generator (DCE-SG) Energy storage management systems (ESMS)
active flux–based sensorless vector control BMSs, 330–331
cross-coupling saturation, 244 cell balancing systems, 332–333
dq (space phasor) model, 242 optimal and safe operation, 330
field circuit equations, 244 SOC
magnetic saturation, 244 Coulomb counting, 331
stator flux, 245 EKF approach, 332
unity power factor control, 246 OCV vs. DOD, 331–332
vector control system, 245–246 rated value of capacity, 330
vector diagram, 245 table vs. OCV value, 331
voltage and current phasor, 242, 244 SOH, 332
active power and torque, 236 SOL, 332
1G/3G transmission drives, 236 ultracapacitors, 330
optimal design Energy storage systems (ESSs)
active–reactive power capabilities, 241 advancements, 320
cost function components, 237–239 advantages, 320
efficiency vs. load, 241–242 classification
electric and magnetic loss evolution, 238–239 capacitors, 321–322 (see also Ultracapacitors)
excitation current vs. load current, 240–241 characteristics, 321–322
FEM key validation, 242–244 electrochemical, 321 (see also Battery energy
initial cost vs. loss cost, 242 storage system)
modified Hooke–Jeeves method, 237 mechanical, 321
multiobjective optimal design, 241 electrical utility systems, 320
parameters and features, 240–241 ESMS
rated efficiency, 237–238 BMSs, 330–331
V curves, 241 cell balancing systems, 332–333
phasor diagram, 236 optimal and safe operation, 330
reactive power, 237 SOC, 330–332
steady-state phase circuit model, 236 SOH, 332
topology layout, 236 SOL, 332
DFIGs, see Doubly fed induction generators ultracapacitors, 330
Discontinuous PWM (DPWM)-MAX, 72–73 interface systems
Discontinuous PWM (DPWM)-MIN, 72–73 AC/DC converters, 333–336
Distributed MPPT (DMPPT) topology, 113–116 isolated DC/DC converters, 337–339
Doubly fed induction generators (DFIGs), 210, 257 non-isolated DC/DC converters, 334–337
advantages and disadvantages, 213–214 renewable energy systems
dq model and control long-term support, 320
FOC, grid-side converter, 219–220 short-term support, 320
FOC, rotor-side converter, 219–220 total capacity, 321–322