Wednesday, 11 June 2014


1) Soft-Switching Bidirectional Isolated Full-Bridge Converter With Active and Passive Snubbers
2) DC/DC Buck Power Converter as a Smooth Starter  for a DC Motor based on a Hierarchical Control
3) An Adjustable-Speed PFC Bridgeless Buck–Boost Converter-Fed BLDC Motor Drive
4) A Novel Single-Phase AC-AC Converter for Circuit Breaker Testing Application
5) New ZVS DC–DC Converter With Series-Connected Transformers to Balance the Output Currents
6) High-Voltage Gain Boost Converter Based on Three-State Commutation Cell for Battery Charging Using PV Panels in a Single Conversion Stage
7) Current Control Methods for an Asymmetrical Six-Phase Induction Motor Drive
8) An Analytical Steady-State Model of LCC type Series–Parallel Resonant Converter With Capacitive Output Filter
9) Fast Transient Boundary Control and Steady-State Operation of the Dual Active Bridge Converter Using the Natural Switching Surface
10) Active Harmonic Filtering Using Current-Controlled, Grid-Connected DG Units With Closed-Loop Power Control
11) New Extendable Single-Stage Multi-input DC–DC/AC Boost Converter
12) Efficiency Optimization Through Current-Sharing for Paralleled DC–DC Boost Converters With Parameter Estimation
13) Optimal Trajectory Control of LLC Resonant Converters for LED PWM Dimming
14) Closed-Loop Control of DC–DC Dual-Active-Bridge Converters Driving Single-Phase Inverters
15) A Half-Bridge LLC Resonant Converter Adopting Boost PWM Control Scheme for Hold-Up State Operation
16) Improved Active Power Filter Performance for Renewable Power Generation Systems
17) An Optimal Minimum-Component DC–DC Converter Input Filter Design and Its Stability Analysis
18) High Efficiency Resonant DC/DC Converter Utilizing a Resistance Compression Network
19) New Bidirectional Intelligent Semiconductor Transformer for Smart Grid Application
20) Analysis and Design of a New Soft-Switching Boost Converter With a Coupled Inductor
21) A New LLC Series Resonant Converter witha Narrow Switching Frequency Variation andReduced Conduction Losses
22) Virtual Quadrature Source-Based Sinusoidal  Modulation Applied to High-Frequency Link Converter Enabling Arbitrary Direct AC-AC Power Conversion
23) Single-Stage Multistring PV Inverter With an Isolated 24) High-Frequency Link and Soft-Switching Operation
24) Modeling of the High-Frequency Rectifier With 10-kV SiC JBS Diodes in High-Voltage SeriesResonant Type DC–DC Converters
 25) Improved Instantaneous Current Control for High-Power Three-Phase Dual-Active Bridge VDC–DC Converters
26) System Integration and Hierarchical PowerManagement Strategy for a Solid-State TransformerInterfaced Microgrid System
27) A Load-Power Adaptive Dual Pulse Modulated Current Phasor-Controlled ZVS High-Frequency Resonant Inverter for Induction Heating Applications
28) Overview of Dual-Active-Bridge IsolatedBidirectional DC–DC Converter forHigh-Frequency-Link Power-Conversion System
29) Stability and Voltage Balance Control of aModular Converter With MultiwindingHigh-Frequency Transformer
30) Isolated ZVS High-Frequency-Link AC-ACConverter With a Reduced Switch Count
31) A LLC-Type Dual-Bridge Resonant Converter:Analysis, Design, Simulation,and Experimental Results
32) The High-Efficiency Isolated AC–DC ConverterUsing the Three-Phase Interleaved LLC ResonantConverter Employing the Y-Connected Rectifier
33) A Bidirectional High-Frequency-Link Single-phaseInverter: Modulation, Modeling, and Control
34) High-Frequency-Link Soft-Switching PWM DC–DCConverter for EV On-Board Battery Chargers
35) A Cascaded Multilevel Inverter Basedon Switched-Capacitor for High-FrequencyAC Power Distribution System
36) Optimal ZVS Modulation of Single-PhaseSingle-Stage Bidirectional DAB AC–DC Converters
37) A Soft-Switched Hybrid-Modulation Schemefor a Capacitor-Less Three-PhasePulsating-DC-Link Inverter
38) Hybrid Dual Full-Bridge DC–DC Converter With Reduced Circulating Current, Output Filter, and Conduction Loss of Rectifier Stage for RF Power Generator Application
39) A New ZCS-PWM Full-Bridge DC–DC Converter
With Simple Auxiliary Circuits
40) A Novel Three-Phase Buck–Boost AC–DC Converter
 41) A Novel Reduced Switching Loss Bidirectional AC/DC Converter PWM Strategy With Feedforward Control for Grid-Tied Microgrid Systems
42) Novel Zero-Voltage and Zero-Current Switching (ZVZCS) PWM Three-Level DC/DC Converter Using Output Coupled Inductor
43) Research on a Novel Modulation Strategy for
Auxiliary Resonant Commutated Pole Inverter With
the Smallest Loss in Auxiliary Commutation Circuits
44) H6 Transformerless Full-Bridge PV Grid-Tied Inverters
45) High Efficiency Photovoltaic Source Simulator withFast Response Time for Solar Power ConditioningSystems Evaluation
46) Novel Loss and Harmonic Minimized VectorModulation for a Current-Fed Quasi-Z-Source Inverter in HEV Motor Drive Application
47)  Switching Frequency Derivation for the Cascaded Multilevel Inverter Operating in Current Control Mode Using Multiband Hysteresis Modulation
 48) A Four-level Hybrid-Clamped Converter With Natural Capacitor Voltage Balancing Ability
49) A Novel Soft-Switching Multiport Bidirectional DC–DC Converter for Hybrid Energy Storage System
  50) Zero Voltage Switching Technique for Bidirectional DC/DC Converters

Monday, 26 May 2014

Distributed FACTS—A New Concept for Realizing Grid Power Flow Control

Flexible ac Transmission Systems (FACTS) devices are used to control power flow in the transmission grid to relieve congestion and limit loop flows. High cost and reliability concerns have limited the widespread deployment of FACTS solutions. This paper introduces the concept of Distributed FACTS (D-FACTS) as an alternative approach to realizing cost-effective power flow control. By way of example, a distributed series impedance (DSI) and a distributed static series compensator (DSSC) are shown that can be clipped on to an existing power line and can, dynamically and statically, change the impedance of the line so as to control power flow. Details of implementation and system impact are presented in the paper, along with experimental results.

Performances of Fuzzy-Logic-Based Indirect Vector Control for Induction Motor Drive


This paper presents a novel speed control scheme of an induction motor (IM) using fuzzy-logic control. The fuzzy-logic controller (FLC) is based on the indirect vector control. The fuzzy-logic speed controller is employed in the outer loop. The complete vector control scheme of the IM drive incorporating the FLC is experimentally implemented using a digital signal processor board DS-1102 for the laboratory 1-hp squirrel-cage IM. The performances of the proposed FLC-based IM drive are investigated and compared to those obtained from the conventional proportional-integral (PI) controller-based drive both theoretically and experimentally at different dynamic operating conditions such as sudden change in command speed, step change in load, etc. The comparative experimental results show that the FLC is more robust and, hence, found to be a suitable replacement of the conventional PI controller for the high-performance industrial drive applications.


DFIG is the emerging technology for wind turbine and still it is needed to improve the
performance of it during the fault situations. So, in this project my objective is to determine
the transient behaviors of the DFIG wind turbine under different operating conditions and
compare it.
Control circuitry of DFIG consists of two converters. Rotor-side and Grid-side
converters. Here I have designed both the converters and performed the simulation of the
transmission line having faults during different operating conditions like under sub- and
The waveforms shown includes the Generated active power, Generated reactive
power, speed of the turbine, pitch angle etc. the waveforms are vary during the different
faults. At the same grid voltage drop, if the initiation generator speed is higher, the active and
reactive power has a larger oscillation. However, in the low speed, the variation time of the
generator speed is larger and the pitch angle of the shaft system is constant. Under fixed
voltage operation strategy, the wind power generation system could help increase the voltage
level of stator terminals by regulating its reactive power output. Therefore, the ability of fault
ride-through and transient stability of the wind farm are improved.
During serious disturbances of the grid, such as a three-phase ground fault, the
power balance between two sides of the DC-Link are destroyed, causing the voltage to
increase rapidly and reach the over-voltage limit in short time, protection schemes are
triggered to protect damage on the wind turbine system. Therefore, taking measures to
limit rotor power output and reduce the power imbalance of the converters under large
disturbances so that the grid-connection is preserved are of importance to increase the
ability of fault ride-through and the global transient stability and dynamic voltage
stability of wind power generation system.

Tuesday, 6 May 2014

Five-Level Inverter for Renewable Power Generation System


In this paper, a five-level inverter is developed and applied for injecting the real power of the renewable power into the grid to reduce the switching power loss, harmonic distortion, and electromagnetic interference caused by the switching operation of power electronic devices. Two dc capacitors, a dual-buck converter, a full-bridge inverter, and a filter configure the five-level inverter. The input of the dual-buck converter is two dc capacitor voltage sources. The dual-buck converter converts two dc capacitor voltage sources to a dc output voltage with three levels and balances these two dc capacitor voltages. The output voltage of the dual-buck converter supplies to the full-bridge inverter. The power electronic switches of the full-bridge inverter are switched in low frequency synchronous with the utility voltage to convert the output voltage of the dual-buck converter to a five-level ac voltage. The output current of the five-level inverter is controlled to generate a sinusoidal current in phase with the utility voltage to inject into the grid. A hardware prototype is developed to verify the performance of the developed renewable power generation system. The experimental results show that the developed renewable power generation system reaches the expected performance.

Design, Analysis and Simulation of Linear Controller of a STATCOM for Reactive Power Compensation on Variation of DC link Voltage


 The STATCOM (STATic synchronous COMpensator) is a shunt connected voltage source converter using self-commutating
device and can be effectively used for reactive power control. Its principle of operation is similar to that of a synchronous condenser. This paper describes the modeling of STATCOM along with the design of linear current and voltage controllers. The design of controllers for the converters can be realized in two ways. The first method is a non-linear realization, which results in simple control rules with faster dynamics. The second method is a linear method, which requires system modeling. The second approach is adopted and simulated waveforms are presented in the paper. The designed controllers with variation of DC link voltage have been applied to the STATCOM and suitable DC link voltage has been selected on basis of spike and over shoot of the responses. All responses are obtained through MATLAB SIMULINK tool box and presented here for clarity of the control strategy.

Analysis and Enhancement of Low-Voltage Ride-Through Capability of Brushless Doubly Fed Induction Generator


This paper discusses the dynamic behavior of the brushless doubly fed induction generator during the grid faults which lead to a decrease in the generator’s terminal voltage. The variation of the fluxes, back EMFs, and currents are analyzed during and after the voltage dip. Furthermore, two alternative approaches are proposed to improve the generator ride-through capability using crowbar and series dynamic resistor circuits. Appropriate values for their resistances are calculated analytically. Finally, the coupled circuit model and the generator’s speed and reactive power controllers are simulated to validate the theoretical results and the effectiveness of the proposed solutions. Moreover, experiments are performed to validate the coupled circuit model used.