scholarly journals Three-phase power factor corrector with direct power control and power supply of the unbalanced industrial network

2019 ◽  
Vol 124 ◽  
pp. 05017
Author(s):  
D.A. Sorokin ◽  
S.I. Volskiy ◽  
Y.Y. Skorokhod
Keyword(s):  
Power Control ◽  
Power Factor ◽  
Electrical Energy ◽  
Input Voltage ◽  
Direct Power ◽  
Direct Power Control ◽  
Three Phase ◽  
Power Loss Reduction ◽  
Industrial Network ◽  
Harmonic Composition

Nowadays three-phase power factor correctors (PFC) became widely used. This is dictated by strict requirements of the international electrical technical commission standards to harmonic composition of current supplied by three-phase industrial network. New schematic technical version of three-phase PFC having direct power control and improved efficiency factor is presented. Mathematical description of power component and control system taking in account its functioning depending upon asymmetrical three-phase input voltage was fulfilled. The electrical processes in the presented PFC was analysed by means of computer simulation. The obtained results are of interest to the persons engaged in the development of electrical energy systems and complexes to which higher requirements in respect to power loss reduction and reliable functioning in case of three-phase asymmetrical industrial network are imposed.

scholarly journals A power quality enhanced for the wind turbine with sensorless direct power control under different input voltage conditions

2021 ◽  
pp. 64-71
Author(s):  
Z.E.Z. Laggoun ◽  
H. Benalla ◽  
K. Nebti
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Electrical Energy ◽  
Input Voltage ◽  
Voltage Sensor ◽  
Direct Power ◽  
Direct Power Control ◽  
Grid Voltage ◽  
Active And Reactive Power

Introduction. The quality of electrical energy is essential during disturbances, at the level of power electronic devices will suffer serious operating problems causing dangerous damage. Aim. A new approach to direct power control without grid voltage sensor improves the quality and control of instantaneous active and reactive power converters. Methodology. First, the technique without network voltage sensor with a direct power control based on a switching table, which is a classic approach, is discussed and its performance is analyzed under increasing and decreasing load. In addition, the performance of the proposed technique is also analyzed under the same circumstances and their performance is compared. Originality. The new method consists of a nonlinear grid voltage modulated controller and a conventional controller which guarantees very good results in a polluted network. The proposed method is verified using MATLAB/Simulink. Results. The simulation results under different input voltage conditions show that the proposed method not only has good tracking performance in active and reactive power, but also reduces the current total harmonic distortion to 1.9 %, which is good lower than the requirement for network operation.

A Concept of Virtual-Flux Direct Power Control of Three-Phase AC-DC Converter

2017 ◽  
Vol 8 (4) ◽  
pp. 1776
Author(s):  
Nor Azizah Mohd Yusoff ◽  
Azziddin M. Razali ◽  
Kasrul Abdul Karim ◽  
Tole Sutikno ◽  
Auzani Jidin
Keyword(s):  
Power Control ◽  
Control Method ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Control Technique ◽  
Direct Power ◽  
Direct Power Control ◽  
Pulse Width Modulated ◽  
Three Phase ◽  
Virtual Flux

<p>This paper presents a proposed technique of virtual-flux direct power control (VF-DPC) as the improvement in control method from the basic of conventional direct power control (DPC) for front-end three-phase pulse width modulated (PWM) in ac-dc converter. Three sensors in order to measure the three phase input voltage have been eliminated in the proposed method of virtual flux (VF) regarding from the estimation technique. Theoritical principles of VF-DPC are discussed in this paper. The steady-state performance of VF-DPC and conventional DPC are evaluated and presented in this work to estinguish for the excellent performance. It is shown that the VF-DPC exhibits the several advantages, particularly in providing low total harmonic distortion with almost sinusoudal of input current and unity power factor (pf) operation under balanced three phase voltage supply. The simulation results from both methods through Matlab simulation have demonstrated the outstanding performance of the new proposed control technique from VF-DPC.</p>

Sign in / Sign up

Export Citation Format

Share Document