This project proposes a novel three phase nine switch AC/AC converter topology. This converter features sinusoidal inputs and outputs, unity power factor, and more importantly, low manufacturing cost. The Operating principle of the Converter is elaborated, its modulation schemes are also discussed, and experimental results from a 5kVA prototype system are provided.

The purpose of this paper is to show the working limits of a Variable Speed Wind Turbine. The system is based on a Doubly-Fed Induction Generator and a Fixed-Pitch Wind Turbine. The machine rotor is connected to the network through an AC/AC Converter in order to allow energy recovery. Thermal, mechanical and electric limits are investigated. The study of the machine is based on a steady state m...

Railway traction is a more stochastic heavy load connected system. Due to the usage of ac-dc converters and ac-ac converters, the various power quality issues become the major problems in the electric system. This paper presents a review on power quality conditioners suitable for Railway traction based on the configuration, components involved and on the technical and economic considerations. M...

Half-wavelength AC transmission line has the characteristics of long distance and high voltage level, its fault are significantly different from conventional line. In order to reduce interference distributed capacitive current on half-wavelength calculation differential protection, this paper proposes a new protection scheme based Bergeron model. solve problem small located at midpoint when sho...

Financial transmission rights (FTR) auction is an important method for allocating the network transmission capabilities to the market participants who value them most. In this letter, series flexible ac transmission systems (FACTS) devices are modeled as additional power injection at buses in the presented linear optimization problem of FTR auction, which is based on a dc power flow model. The ...

Distributed flexible AC- transmission system (D-FACTS) is a recently advanced FACTS device with high flexibility and smaller size. The DPFC can control power flow in transmission lines, regulate bus voltages and it can also enhance stability margin in power grids. Adaptive-neural network-based fuzzy inference system (ANFIS) combines features of artificial neural network and fuzzy controller. Th...

This paper presented a variable frequency electric power transmission system (abbreviated as VFTS). The VFTS employs the unique variable frequency transformers (VF-transformers) to couple the transmission or distribution lines or networks to the sending and receiving systems. The VFTS changes the transmission frequency to provide unique features that cannot be obtained in the traditional ac and...

The presented paper deals with the implementation of the Switching Table Based Direct Torque Control (ST-DTC) in the matrix converter-fed induction motor drive. In order to improve the control of the matrix converter input power factor, the use of the simplified Indirect Space Vector Modulation (ISVM) was proposed. To verify the feasibility of the proposed solution, experimental results were pr...

This paper presents a new method to compensate the nonlinearity for matrix converter drives using disturbance observer. The nonlinearity of matrix converter drives such as commutation delay, turn-on and turn-off time of switching device, and on-state switching device voltage drop is modeled by disturbance observer and compensated. The proposed method does not need any additional hardware and of...