Analysis and design of an active power filter for three-phase balanced electrified railway power supply system

2004 ◽  
Author(s):  
Zeng Guohong ◽  
Hao Rongtai
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Active Power Filter ◽  
Active Power ◽  
Supply System ◽  
Analysis And Design ◽  
Power Filter ◽  
Three Phase ◽  
Electrified Railway

Active power filter for reactive power compensation for the powerful sounding pulses shapers

2020 ◽  
Vol 1 (1) ◽  
pp. 21-30
Author(s):  
Olena Levon ◽  
Igor Domnin
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Active Power Filter ◽  
Reactive Power Compensation ◽  
Active Power ◽  
Supply System ◽  
Active Filter ◽  
Supply Network ◽  
Power Filter

The expediency of using a power active filter in the mode of reactive power compensation of the supply network for the powerful sounding pulses shaper power supply system of the Institute of ionosphere NAS and MES of Ukraine is shown. An analysis of the literature has been carried out, which shows the effectiveness of solving the problem of reactive power compensation, filtering higher harmonics of the power supply network using active filtering of higher harmonics of current or voltage using an additional energy source to obtain a compensating signal in the form of current or voltage. The choice of the power circuit for constructing a power active filter has been made. A voltage inverter on IGBT transistors is used as a power active filter. The basic principles of operation of the power active filter control system are described, which are based on the p-q theory of power and provide for the calculation of instantaneous values ​​of the task currents for each phase of a three-phase power supply system. The work of the Matlab-model of the power supply system of the shaper is shown, the oscillograms of the main energy characteristics of the shaper are given. As a result of using a power active filter, the current of the supply network becomes close to sinusoidal, and the power factor tends to 1. A positive effect on the efficiency of the shaper when the power active filter is included in the supply network is noted, which is due to the efficiency of compensation of the reactive power consumed by the shaper from the supply network. The simulation results are presented, in particular, graphs of reactive power change at the point of connecting the power active filter to the supply network, at different levels of reactive power consumption by the shaper. The results obtained confirmed the possibility of using a power active filter in the mode of reactive power compensation of the supply network when solving the problems of improving the electromagnetic compatibility of powerful sounding pulses shapers with the supply network, reducing losses and increasing the reliability of the shapers. Keywords: active power filter, reactive power control, control systems

scholarly journals INFLUENCE OF THE FILTER IN THE CONTROL CHANNEL CONTOURS OF THE STORAGE CAPACITOR VOLTAGE STABILIZATION ON THE DYNAMICS IN THREE-PHASE SHUNT ACTIVE POWER FILTER

2021 ◽  
Vol 2021 (58) ◽  
pp. 55-65
Author(s):  
K.I. Denisenko ◽  
◽  
V.O. Lesyk ◽  
T.V. Mysak ◽  
◽  
...  
Keyword(s):  
Dynamic System ◽  
Power Supply ◽  
Active Power Filter ◽  
Active Power ◽  
Storage Capacitor ◽  
Two Dimensional ◽  
Voltage Stabilization ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Three Phase

The object of research is a three-phase shunt active power filter, which consists of a semiconductor voltage inverter on fully controllable switches, capacitive storage, and an RL-link. The carried-out decomposition of the research object according to the rate of motion of the dynamic system makes it possible to divide this dynamic system into two subsystems, interconnected by control. The role and influence of the communication subsystem between the voltage stabilization circuit on the storage capacitor of the three-phase shunt active power filter and the circuits for the formation of the compensation current, which is injected by this filter into the distributed power supply network, is considered. The presence of a non-linear load in this network is a source of distortion of the parameters of electrical energy. The formation of the compensation current by the forced introduction of the first order sliding modes along some sliding surfaces was carried out. The two-dimensional sliding surface is a linear combination of the components of the two-dimensional error vectors of the compensation current and the first derivative of the error of this current. The introduced communication subsystem makes it possible to reduce the influence of the disturbance in the form of harmonic components of the rectified voltage on the parameters of the compensating current. The influence of the dynamic characteristics of a communication subsystem with filtering properties on the performance indicators of a parallel active filter and the current distortion factor in the power supply network to which this filter is connected was analyzed. To confirm the theoretical assumptions, a simulation model was built and the results of digital modeling were analyzed. Comparison of different types of filters as a communication subsystem according to the criteria of the duration of the transient process and the harmonic distortion in the current that consumed from the network was carried out. References 26, figures 4, tables 3.

THD and Compensation Time Analysis of Three-Phase Shunt Active Power Filter Using Adaptive Blanket Body Cover Algorithm

2018 ◽  
pp. 1-28
Author(s):  
S. Khalid
Keyword(s):  
Harmonic Distortion ◽  
Active Power Filter ◽  
Active Power ◽  
Supply System ◽  
Control Technique ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Three Phase ◽  
Control Scheme ◽  
Simulation Results

A novel Adaptive Blanket Body Cover Algorithm (ABBC) has been presented, which has been used for the optimization of conventional control scheme used in shunt active power filter. The effectiveness of the proposed algorithm has been proved by applying this in balanced, unbalanced and distorted supply conditions. The superiority of this algorithm over existing Genetic Algorithm results has been presented by analyzing the Total Harmonic Distortion and compensation time of both the algorithms. The simulation results using MATLAB model ratify that algorithm has optimized the control technique, which unmistakably prove the usefulness of the proposed algorithm in balanced, unbalanced and distorted supply system.

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