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Fuzzy set theory applications have received increasing attention in various areas of power systems such as operation, planning, and control. Fuzzy logic controllers are allowing power systems for wider operating conditions under uncertainties. Control algorithms based on fuzzy logic have been implemented in many processes. The application of such control techniques has been motivated of their improved...
The Unified Power Quality Conditioner (UPQC) is distribution FACTS device which is combination of Shunt compensator (DSTATCOM) and series compensator (DVR) connected back to back by a common DC link capacitor. The DC link capacitor generally as per requirement of shunt compensation which is 1.6 V of line voltage of system, and for series VSI it is equal to system line voltage, the mismatch of shunt...
This paper presents the structural and operational comparison of line commutated converter (LCC), voltage source converter (VSC) and Modular Multi level converter(MMC) for High voltage applications and also presents the simulation model of modular multilevel converter (MMC) which is one of the most promising converter topologies for highvoltage applications, especially for high-voltage direct-current...
A voltage source inverter with variable frequency and variable voltage is applied for three-phase interior permanent magnet synchronous motor (IPMSM) drive for variable speed application. To obtain the required output voltage in the line side of the inverter a suitable pulse width modulation technique is used. The most prominent PWM techniques are Sinusoidal pulse width modulation (SPWM) and Space...
In this paper, the feasibility of embedding the direct torque control (DTC) of an induction machine into field programmable gate arrays (FPGA) is investigated. DTC of an induction machine is simulated in a MATLAB/Simulink environment using a Xilinx system generator. The resulting design has a flexible and modular structure where the designer can customize the hardware blocks by changing the number...
This paper describes the design of an observer-based intelligent coordinated controller using fuzzy logic system and sliding mode observer. This concept prevents an electric power system losing synchronism after a large sudden fault and their by achieves good post-fault voltage level. The developed controller has a fuzzy logic unit, which accepts change in terminal voltage and speed deviation from...
This paper reviews the application of Field Programmable Gate Array (FPGA) design methodology to industrial drives. The advances in FPGA technology have been extraordinary. Numerous industrial applications such as power control or automotive appliances require high speed, very large number of components, abundance of available design sources, ready to-use intellectual property. This paper starts with...
In this paper space vector modulation and multi level carrier based PWM for the 4-level inverter fed induction motor drive are presented. Four-level inversion can be achieved by connecting three two-level inverters in cascade. Three isolated power supplies with DC link voltages are required for the proposed circuit topology. The voltages constitute one third of that of a conventional 2-level inverter...
This paper presents a five-level inverter for an open-end winding induction motor. Five-level inversion is achieved by feeding an open-end winding induction motor with a 3-level inverter from one end and a 2-level inverter from the other end of the motor. The 3-level inverter used in the proposed drive is realized by cascading two 2-level inverters. The combined inverter system with open-end winding...
This paper presents the compensation principle using PI and ANN control strategies of the USSC in detail. The USSC is an active filter (AF) and it compensates the reactive power, harmonics in both the voltage and current caused by loads. The USSC makes use of two back to back connected IGBT based voltage source inverters (VSIs) with a common DC bus. One inverter is connected in series and the other...
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