three-phase PWM rectifier

A single-phase, three-level, single-stage power-factor corrected AC/DC converter operated under closed loop manner is presented. That operates with a single controller to regulate the output voltage and the input inductor act as a boost inductor to have a single stage power factor correction with good output response. The paper deals with a new single stage three level ac-dc converter which performs both power factor correction and voltage regulation in a single stage. The proposed converter has two separate controllers, one for power factor correction and the other for regulating the output voltage. A comprehensive review of the existing single stage topologies has been carried out. Then the operating principle, control scheme and the design of the new converter are presented. The proposed converter is having an input power factor close to unity and better voltage regulation compared to the conventional ac-dc converter topologies. Proposed topology is evaluated through Matlab/Simulink platform and simulation results are conferred.

Tangent delta is an electrical diagnostic method to determine the condition of the insulation. One of the insulations to know is transformer oil being a liquid insulation. In a transformer, insulation is an important part to know from the beginning as a reference to determine the life of the insulation. To ascertain or know the effect of transformer oil on tangent delta, this study is conducted against transformer oil before filtering and after filtering. An instrument used for testing tangent delta testing is Megger Delta 2000. This instrument has several testing methods namely GST, GSTg, and UST.

Tugas akhir ini akan dirancang suatu pengontrolan dan pengereman pada motor induksi 3 fasa dengan tegangan yang variabel untuk memperbaiki kinerja motor induksi sehingga dapat diaplikasikan secara maksimal.Dewasa ini,semakin banyak pekerjaann baik itu di rumah maupun di kawasan industri yang menyediakan daya dan energi yang besar,sementara penggunaan pada beban motor sendiri seharusnya bisa disesuaikan dengan kebutuhan.Sehingga dirancang suatu pengontrolan terhadap kecepatan dan pengereman pada motor induksi 3 fasa dengan metode static scherbius drive. Metode ini terdiri dari 2 bagian utama yaitu rangkaian penyearah 3 fasa dengan menggunakan komponen dioda 6A10 MIC sehingga menghasilkan tegangan keluaran DC (Direct Current) dan selanjutnya masuk pada rangkaian inverter 3 fasa dengan menggunakan MOSFET IRFP460 sehingga menghasilkan tegangan keluaran AC (Alternating Current) yang bisa menjalankan motor induksi yang digunakan. Untuk bisa menghasilkan tegangan output AC,maka kita mengatur diagram vektor-vektor switching pada inverter 3 fasa melalui mikrocontroller arduino uno yang sudah di siapkan programnya. Pada listing program kita atur perubahan duty cycle sehingga mempengaruhi tegangan output dari MOSFET,perubahan inilah yang mengakibatkan putaran motor bisa berubah-ubah.Sementara pada pengereman motor induksi,kita menggunakan jenis pengereman dinamik dengan memberikan injeksi tegangan DC pada motor induksi.Dari analisa pada pengambilan data,perancangan ini bisa mengatur  kecepatan serta pengereman pada motor induksi. Sehingga perancangan modul ini bisa dikembangkan untuk penerapan di rumah maupun pada kawasan industri.

This article proposes a new approach to reduce harmonics generated by a three-phase diode rectifier. The proposed approach uses the input filters, six controllable switches, high-frequency isolation transformer, and the three-phase diode rectifier. The switching of the controllable switches is modulated by a novel pulse-width modulation (PWM) implemented in an XC4006 field programmable gate array (FPGA). This approach realizes sinusoidal input current waveforms with low electromagnetic interference and arbitrary output voltage. The output voltage can be controlled by variation of the modulation index in the range (0 ≤ M ≤ 0.98). The experimental results to compare performance between with and without the proposed approach are carried out to confirm its feasibility.

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1047184&tag=1

This paper presents Virtual flux based and Voltage based control schemes for PWM rectifiers in grid connected distributed generation systems from renewable sources are presented. In particular, the so-called Voltage Oriented Control (VOC), Direct Power Control (DPC), two DPC based techniques to minimize the Common Mode (CM) emissions called DPC-EMC1 and DPC-EMC2 set up by the authors and their versions based on virtual flux. All th e d es cri bed techn iq ues ha ve b een implemented using MATLAB/Simulink ® (Classic version 8.2 Release name (R2013b)) and compared with each other. Theoretical background with results of simulations is provided. The advantages and disadvantages of the individual control strategies are documented.

The three-phase Pulse Width Modulation PWM generation is the heart of the inverter system. Its main function is to control the switching sequence of the power devices according to per-loaded instruction. Using Field Programmable Gate Array (FPGA) technology all the functions can be implemented in a single chip. The implementation tool fit the entered design into the target device (XC4008E). It will compile a design file into a configuration file that is optimized using logic gates and interconnections for the target device. Design verification includes functional simulator, circuit testing and timing simulation are the main functions to verify the proper operation of the designed circuit. Foundation series M1.S has been used in this work. This Xilinx development tools converts the design idea into a configuration data file, which could be loaded into Xilinx FPGA.

—The main purpose of this paper is to establish a multi-objective function for optimal load balancing in modern distribution networks. The proposed approach can reduce the three-phase voltage unbalance ratio and system power loss; furthermore, the system operation performance will be improved. The genetic algorithm and three-phase power flow algorithm are coded in Matlab. Finally, the IEEE 37-Bus test system is used as the sample system to verify the accuracy of the proposed approach. The simulation results demonstrate that the proposed approach is systematic and efficient for solving the load balancing problem in active distribution networks. Keywords—load balancing; genetic algorithm; three-phase power flow; voltage unbalance ratio; system power loss

Integration of wind power to grid introduces power quality issues, which mainly consist of voltage regulation and reactive power compensation. Induction machines are mostly used as generators in wind power based generations. Induction generators draw reactive power from the grid to which they are connected. Therefore, the integration of wind power to power system networks is one of the main concerns of the power system engineers. The addition of wind power into the electric grid affect's the power quality This paper describes the modeling and control of a variable speed wind turbine system for medium power based Permanent Magnet Synchronous Generator (PMSG) which feeds an AC power grid. The generator speed is regulated under fluctuating wind speed through this converter. A dc link voltage controller is used to regulate the dc bus voltage under fluctuating wind and grid disturbance. The direct drive PMSG is connected to the load through a switch mode rectifier and a vector controlled pulse width modulated (PWM) IGBT-inverter. The generator side switch mode rectifier is controlled to achieve maximum power from the wind. The load side PWM inverter is using a relatively complex vector control scheme to control the amplitude and frequency of the inverter output voltage. The simulation results are obtained using MATLAB/SIMULINK software.

This paper presents system analysis, modeling and simulation of an electric vehicle (EV) with three different control strategies: field oriented control (FOC), direct torque control (DTC), and DTC using space vector modulation (DTC- SVM). The objective is to assess the control strategy impact on the EV efficiency taking into account the vehicle dynamics. Indeed, among EV motor electric propulsion features, the energy efficiency is a basic characteristic that is influenced by vehicle dynamics and system architecture. Simulation tests have been carried out on a 37-kW EV that consists in an induction motor with a three-level IGBT inverter. Preliminary results seem to indicate that the DTC-SVM scheme is the best candidate.

ABSTRACT This paper presents the analysis and design of the direct power control of a boost PWM rectifier based on sliding mode control. In the aim to improve control performance of the rectifier, the proposed approach combines the merits of sliding mode control, direct power control and space vector modulation. The resulting control scheme is able to drive the output dc voltage to the desired value while keeping a sinusoidal input phase control with a unity power factor. The feasibility and effectiveness of the considered control structure has been examined by computer simulations.

Providing resistance against side channel attacks especially differential power analysis (DPA) attacks, which aim at disclosing the secret key of cryptographic algorithm is one of the biggest challenges of designers of cryptographic devices. In this paper design of novel data flip-flop compatible with three-phase dual-rail logic (TDPL), called Charge recycling TDPL flip-flop is investigated. The new flip-flop uses inverters that uses the charge recycling technique where charge stored on high output node during evaluation phase is used to partially charge the low output node in subsequent pre-charge phases. As a result less charge comes from the power supply thus lowering the power consumption. Simulation results in Cadence Virtuoso 45 nm CMOS process show improvement in power consumption in inverter up to 60% while CRTDPL flip-flop consumes around 50% less power compared to TDPL flip-flop.

This paper proposes the design of a dual frame cascaded PI controller for the three phase PWM boost rectifier under unbalanced supply voltage conditions by using singular perturbation method. By inducing two-time-scale motions, namely fast motion sub-system and slow motion sub-system, the desired output transient performance can be achieved with stability conditions imposed on the fast and slow modes with a sufficiently large mode separation rate. The proposed controller is also insensitive to the nonlinearities of the system and the variations in the plant parameters. Experimental test results obtained on a 1.6 kVA laboratory based PWM rectifier, validate that the controller can guarantee constant dc link voltage and unity power factor operation under the unbalanced supply voltage operating conditions.

This paper present our experience in the design of a permanent magnet generator. The generator has a long translator and a permanent magnet mover as magnetic field source. It generates a three phase electrical current. The generator is proposed to be operated using a dual chamber free piston internal combustion linear engine. The finished product is to be placed in a hybrid electric vehicle to generate electricity to run the motors and to charge the batteries [1],[2]. The machine design is performed using a 2D finite element analysis. The generator produces a three phase voltage and the power output is 7 kW. This paper also presents the fabrication of the prototype. © 2006 IEEE.

http://ieeexplore.ieee.org/ielx5/4107286/4107287/04107367.pdf?tp=&arnumber=4107367&isnumber=4107287

— In this paper, simulation and practical implementation of direct power control is presented for a PWM Rectifier application. The proposed DPC control has several advantages, including the grid current very close to sinusoidal waveforms (TDH <1.2%), and good regulation of DC-bus voltage is achieved using the PI controller. The simulation and the experimental results obtained in this study, demonstrate the effectiveness of the direct power control algorithm to eliminate the harmonic currents, ameliorate the active power quality and minimize the reactive energy effect which allowed us to affirm the strength of the proposed strategy.

Abstract The three-phase pulse width modulation (PWM) generation is the heart of the inverter system. Its main function is to control the switching sequence of the power devices according to per-loaded instruction. Using field programmable gate array (FPGA) technology all the functions can be implemented in a single chip. The implementation tool fit the entered design into the target device (XC4008E). It will compile a design file into a configuration file that is optimized using logic gates and interconnections for the target device. Design ...