Multilevel Inverters: Control Methods and Advanced Power Electronic Applications

Front Matter
Copyright
Contributors
Preface
Pulse width modulation and control methods for multilevel inverters
	Introduction
	Modulation theory
		Pulse modulation methods
		PWM role in power electronics
	PWM methods for multilevel inverters
		Sinusoidal PWM
		Selective harmonic elimination PWM (SHE-PWM)
		Space vector PWM (SVM-PWM)
		Third harmonic injection PWM (THI-PWM)
	PLL control methods used in multilevel inverters
		Synchronous reference frame (SRF) PLL
		αβ PLL
		Double synchronous reference frame (DSRF) PLL
		Sinusoidal signal integrator (SSI) PLL
		Dual second-order generalized integrator (DSOGI) PLL
		Enhanced PLL
	Control structures for grid-connected inverters
		Synchronous reference frame control
		Stationary reference frame control
		Natural frame control
	References
Hysteresis control methods
	Introduction
	MB hysteresis current control
	MOB hysteresis current control
	TB hysteresis current control
	MB hysteresis voltage control
	Hysteresis voltage regulation
	Adaptive band low-frequency hysteresis voltage control (AB-LF-HVC)
		Description of the studied inverter
			Design example
		Fundamentals of AB-LF-HVC
		Adaptive hysteresis control implementation
		Simulated results
		Comparison and discussion
	Conclusions
	References
Proportional resonance control and applications
	Introduction
	Challenges in inverter systems control
		Literature review
	Problem statement and description
		Problem formulation
		System modeling
		Effect of parameter variations on system performance
			Frequency response of the system
	Proposed multifrequency proportional resonant controller
		State feedback control
		Resonant controller
		Polytopic model for uncertain systems
		Stability according to Lyapunov
		Pole clustering regions
		Generalized Lyapunov theorem
		H optimization
	Controller synthesis with robust D-stability-based LMI approach
		Control design algorithm
	Results and discussion
		Simulation results
			Bessel polynomials
			Robust control
		Stability analysis for parametric variations
			Bessel polynomials
			Robust control
	Conclusion
	References
Model predictive control of multilevel diode-clamped converters
	Introduction
	Power circuit of multilevel diode-clamped converters
	Mathematical modeling
		Modeling of the converter output currents
		Modeling of the DC capacitor voltages
		Modeling of the common-mode voltage
	Predictive current control scheme
		Reference currents calculation
		Extrapolation of reference currents
		Predictive model
		Cost function minimization
		Selection of weighting factors
		Selection of prediction horizon (h)
		Control algorithm
	Simulation results
		Steady-state analysis
		Transient analysis
		Robustness against dc-link perturbations
		Switching frequency reduction
		Common-mode voltage minimization
	Conclusion
	References
Model predictive control of modular multilevel converters
	Introduction
	Power circuit of modular multilevel converter
		Converter and submodule configuration
		Control objectives
	Mathematical modeling of an MMC
		Model of DC-link current
		Model of output current
		Model of circulating current
		Model of submodule capacitor voltage
		Model of arm voltage
	Model predictive control of an MMC
		Challenges and issues
		Methodologies
	Direct model predictive control
		Control algorithm
		Results and analysis
	Indirect model predictive control
		Control algorithm
		Voltage balancing strategy
		Results and analysis
	Conclusions
	References
Multilevel converters for renewable energy systems
	Introduction
	Overview of multilevel converters for renewable energy
	Back-to-back connected multilevel converters for wind energy
		BTB neutral-point clamped converter
		BTB active neutral-point clamped converter
		BTB flying capacitor converter
		BTB double-star four-level converter
		BTB modular multilevel converter
		BTB current source converter
	Passive generator-side multilevel converters for wind energy
		Vienna rectifier and NPC inverter
		MV diode rectifier, 3L boost converter, and NPC inverter
		MV diode rectifier, Buck converter, and current source inverter
	Multiphase generator-side multilevel converters for wind energy
		Cascaded BTB converters with six-phase PMSG
		Cascaded PGS converters with six-phase PMSG
		Cascaded converters with multiphase PMSG
	Direct AC-AC multilevel converters for wind energy
	Central multilevel inverters for photovoltaic energy
		Neutral-point clamped inverter
		T-type inverter
		Current source inverter
	String multilevel inverters for photovoltaic energy
	Multistring multilevel inverters for photovoltaic energy
	Conclusion
	References
Multilevel inverter applications for electric vehicle drives
	Introduction
	Multilevel inverter topologies for EVs
		Cascaded H-bridge multilevel inverter
		Neutral point clamped inverter
		Active neutral point clamped (ANPC) inverter
		T-type NPC inverter
	Multilevel inverter control systems for EVs
		Field-oriented control
		Direct torque control
		Model predictive control
		Sliding mode control (SMC)
	References
STATCOM and DSTATCOM with modular multilevel converters
	Introduction
		Basic principle of operation
		STATCOM DC side capacitor
	Multilevel converter topologies
		Modular multilevel converter
		Basic switching control techniques
		SM voltage equalization
		Circulating current compensation
		DC capacitor design
		Arm filter design
	Mathematical modeling and control of the MMC-STATCOM
		Current control
		Positive- and negative-sequence detectors
		The positive- and negative-sequence current control
		The generation of quadrature signals for the zero-sequence
		The zero-sequence current control
		The DC terminal voltage control
	Applications of STATCOM in modern electric networks
		PCC voltage compensation
		Control of the PCC positive-sequence voltage
		Control of the PCC negative-sequence voltage
		Zero-sequence voltage compensation
		Simulation of the PCC voltage compensation using the MMC-STATCOM
		Case 1
		Case 2
		Case 3
	Practical issues
		Consumer imbalance assessment methodology
		STATCOM energization scheme
	Appendix
	References
Solid state transformers with multilevel inverters
	Introduction
	Architecture of SSTs
	Isolation configurations of SSTs
	Multilevel inverter configurations used in SSTs
	Conclusions
	References
Index
	A
	B
	C
	D
	E
	F
	G
	H
	I
	L
	M
	N
	O
	P
	Q
	R
	S
	T
	U
	V
	W
	Z