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.

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 Mitigation of Harmonics in Three - Phase Three - Wire System by using Fuzzy Logic Controlled Shunt Active Filters

2020 ◽  
Vol 6 (11) ◽  
pp. 87-91
Author(s):  
Goggi Kirshna Sanyasi Rao and P.Murari
Keyword(s):  
Reactive Power ◽  
Control Strategies ◽  
Pi Controller ◽  
Active Power ◽  
Active Filters ◽  
Shunt Active Power Filter ◽  
Current Harmonics ◽  
Active Power Filters ◽  
Power Filters ◽  
Synchronous Reference Frame

This paper shows the method of improving the power quality using shunt active power filter. In order to protect the supply system from current harmonics, we have to use the active power filters. These are used to compensate the reactive power compensation, but the performance of active power filters are based on various control strategies. This paper presents the complete examination to estimate the working of SHAF for generating the current references under steady and transient for balanced, unbalanced and non-sinusoidal conditions by using PI controller. The P-Q theory and synchronous reference frame theory, which are widely used in SHAF. The most validate results obtained by simulation with matlab/simulink software are carried out with PI controller for P-Q control theory for various voltage conditions like balanced, unbalanced and non-sinusoidal conditions and dynamic load changes.

Sign in / Sign up

Export Citation Format

Share Document