scholarly journals Software Solution for Modeling, Sizing, and Allocation of Active Power Filters in Distribution Networks

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 133
Author(s):  
Dawid Buła ◽  
Dariusz Grabowski ◽  
Michał Lewandowski ◽  
Marcin Maciążek ◽  
Anna Piwowar
Keyword(s):  
Power Systems ◽  
Modeling And Simulation ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Distribution Networks ◽  
Active Power ◽  
Active Power Filters ◽  
Power Filters ◽  
Depth Analysis ◽  
Selection Of

The paper is related to the problem of modeling and optimizing power systems supplying, among others, nonlinear loads. A software solution that allows the modeling and simulation of power systems in the frequency domain as well as the sizing and allocation of active power filters has been developed and presented. The basic assumptions for the software development followed by the models of power system components and the optimization assumptions have been described in the paper. On the basis of an example of a low-voltage network, an analysis of the selection of the number and allocation of active power filters was carried out in terms of minimizing losses and investment costs under the assumed conditions for voltage total harmonic distortion (THD) coefficients in the network nodes. The presented examples show that the appropriate software allows for an in-depth analysis of possible solutions and, furthermore, the selection of the optimal one for a specific case, depending on the adopted limitations, expected effects, and investment costs. In addition, a very high computational efficiency of the adopted approach to modeling and simulation has been demonstrated, despite the use of (i) element models for which parameters depend on the operating point (named iterative elements), (ii) active filter models taking into account real harmonics reduction efficiency and power losses, and (iii) a brute force algorithm for optimization.

scholarly journals Compensated Medium Voltage 6-Pulse CSR Using Shunt Active Power Filters: Three Different Configurations

2014 ◽  
Vol 10 (2) ◽  
pp. 1
Author(s):  
MS Hamad ◽  
MI Masoud
Keyword(s):  
Low Voltage ◽  
Harmonic Distortion ◽  
Input Power ◽  
Active Power ◽  
Current Control ◽  
Shunt Active Power Filter ◽  
Active Power Filters ◽  
Medium Voltage ◽  
Power Filters ◽  
Compensation Technique

 The 6-pulse controlled AC/DC converter produces harmonics. The input current total harmonic distortion and the input power factor, which is firing delay angle dependent, are major drawbacks, and a compensation technique is mandatory. This paper introduces a compensated 6-pulse current sourcecontrolled rectifier with a shunt active power filter (APF ) in different configurations. The shunt APF  with predictive current control is coupled to the 6-pulse systems in three different compensation configurations. The APF  is connected either directly to the front-end transformer primary or secondary side or via a transformer to reduce the filter side voltage. The comparison between these configuration is introduced; each configuration has merits and demerits. The comparison cannot be genuine. Simulation results are presented for a medium voltage converter which is scaled to allow low-voltage experimental confirmation. 

Comparison of Constant Instantaneous Power Control & Synchronous Rotating Frame Strategy for Total Harmonic Reduction in Aircraft System (400Hz)

2013 ◽  
Vol 768 ◽  
pp. 287-297
Author(s):  
Saifullah Khalid ◽  
Anurag Tripathi ◽  
V.M. Mishra
Keyword(s):  
Control Method ◽  
Control Strategies ◽  
Active Power ◽  
Rotating Frame ◽  
Active Power Filters ◽  
Instantaneous Power ◽  
Power Filters ◽  
Harmonic Reduction ◽  
Aircraft System ◽  
Selection Of

Two different control strategies for extracting reference currents for shunt active power filters have been evaluated and their performances have been compared under various non linear loads. Comparison of the compensation ability of different control strategies based on THD and speed will be done and suggestions will be given for the selection of strategy to be used under different load. The simulated results using MATLAB model are presented and they will clearly prove the effectiveness of the proposed control method of aircraft shunt APF.

scholarly journals A Hybrid Active Filter Using the Backstepping Controller for Harmonic Current Compensation

Symmetry ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1161 ◽  
Author(s):  
Daou ◽  
Montoya ◽  
Ababssi ◽  
Djeghader
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Active Power ◽  
Active Filter ◽  
Electricity Grid ◽  
Active Power Filters ◽  
Power Filters ◽  
Logic Control ◽  
Backstepping Controller ◽  
The Stability

This document presents a new hybrid combination of filters using passive and active elements because of the generalization in the use of non-linear loads that generate harmonics directly affecting the symmetry of energy transmission systems that influence the functioning of the electricity grid and, consequently, the deterioration of power quality. In this context, active power filters represent one of the best solutions for improving power quality and compensating harmonic currents to get a symmetrical waveform. In addition, given the importance and occupation of the transmission network, it is necessary to control the stability of the system. Traditionally, passive filters were used to improve energy quality, but they have endured problems such as resonance, fixed remuneration, etc. In order to mitigate these problems, a hybrid HAPF active power filter is proposed combining a parallel active filter and a passive filter controlled by a backstepping algorithm strategy. This control strategy is compared with two other methods, namely the classical PI control, and the fuzzy logic control in order to verify the effectiveness and the level of symmetry of the backstepping controller proposed for the HAPF. The proposed backstepping controller inspires the notion of stability in Lyapunov’s sense. This work is carried out to improve the performance of the HAPF by the backstepping command. It perfectly compensates the harmonics according to standards. The results of simulations performed under the Matlab/Simulink environment show the efficiency and robustness of the proposed backstepping controller applied on HAPF, compared to other control methods. The HAPF with the backstepping controller shows a significant decrease in the THD harmonic distortion rate.

scholarly journals Analysis of Ripple Current in the Capacitors of Active Power Filters

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4493
Author(s):  
Tadeusz Platek
Keyword(s):  
Active Power ◽  
Point Of View ◽  
Output Current ◽  
Technical Literature ◽  
Nonlinear Load ◽  
Lcl Filter ◽  
Current Harmonics ◽  
Active Power Filters ◽  
Power Filters ◽  
Selection Of

This article provides formulae to determine the root mean square (rms) value of a capacitor current in an inductive-capacitive-inductive (LCL) filter used in a parallel active power filter (PAPF) circuit. The article presents an analysis of three components of the capacitor current: a component forced by the usually distorted voltage of the grid; a component forced by the nonlinear load current harmonics and harmonics in the output current of the PAPF that compensates them (a novel aspect presented in this document); and a component forced by the inverters of the PAPF containing carrier and sideband harmonics. The article also presents formulae for determining the rms value of current harmonics in dc-link capacitors forced by the ripple of the ac output current without load of the filter inverters (also novel to this document). The results of the analysis have been confirmed by simulation and experimental research of a commercial active filter consisting of two parallel interleaved voltage inverters. Elements of the LCL filter of the PAPF have been selected according to dependencies available in scientific and technical literature. In addition, the formulae presented in the article are used to verify the correctness of selection of capacitors from the point of view of their catalogue acceptable rms value of capacitor current.

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