DYNAMIC PERFORMANCES OF THE SHUNT ACTIVE POWER FILTER CONTROL SYSTEM

2021 ◽  
Vol 4 (1) ◽  
pp. 47-56
Author(s):  
Sergiy Mykchailovych Peresada ◽  
Sergiy Mykolaiovych Kovbasa ◽  
Yuriy Mykchailovych Zaichenko
Keyword(s):  
Fourier Transform ◽  
Control System ◽  
Fast Fourier Transform ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Adaptive Observer ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Instantaneous Power

Harmonic pollution of the electrical mains is well known and well-studied phenomena. Active power filter being a powerful tool to meet the requirements of regulatory documents regulating the electricity quality. Despite this fact, practical implementation of the active power filter is still connected with significant difficulties. In particular, existing systems typically use fast Fourier transform methods or instantaneous power theory to estimate the harmonic composition of the mains current. However, the use of fast Fourier transform requires high computing power of the control system, and the implementation of the theory of instantaneous power significantly increases the requirements for the power part of the active filter. The application of another approach - selective compensation of harmonics, makes it possible to reduce computational requirements and significantly simplify the technical implementation of the active filter and at the same time to achieve an acceptable level of distortion compensation. In this paper, the shunt active power filter control system is designed and investigated. Proposed control system consist of selective harmonics observer, feedback-linearizingcurrent controller, dc-link controller and mains voltage observer. Harmonics observer is tuned according to simplified approach, provides selective estimation of the load current harmonics and produce the compensation current reference for the current controller. Nonlinear dc-link voltage controller guarantees decoupled from current compensation process asymptotic regulation of the average dc-link voltage. Mains voltage vector adaptive observer provides magnitude, angular position and frequency estimation. Proposed control system is implemented on digital signal processor TMS320F28335 end verified experimentally. Results of experimental investigations together with results of simulations confirm effectiveness of proposed solution. Developed control system can be used for shunt active filters implementation.

A PV-Active Power Filter Interface Scheme for Three Phase Balanced System

2020 ◽  
Vol 46 ◽  
pp. 125-145 ◽  
Author(s):  
Abdeldjalil Slimani ◽  
Mohammed Nacer Tanjaoui ◽  
Abdelkader Boutadara ◽  
Lakhdar Saihi ◽  
Nadjem Bailek ◽  
...  
Keyword(s):  
Fuzzy Controller ◽  
Digital Simulation ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Software Environment ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Instantaneous Power ◽  
Hybrid Controller

This paper presents a modified hybrid Controller based on instantaneous power-fuzzy controller (IPFLC) for a shunt active power filter (SAPF). The current produced by the AC source is polluted by harmonics injected by the non-linear loads. The supply system requires filtering by suppressing harmonic currents to improve power quality at interface bus. The filtering system consists of an LC filter and a SAPF. The proposed IPFL Controller for the SAPF is based on a combination of the p-q instantaneous power and the fuzzy logic strategy. In this part, two cases are studied, first the active filter is connected only to a capacitor by its dc side, and second case where the active filter is connected to a photovoltaic source or to a battery. The effectiveness, robustness and the dynamic speed of the proposed controller is validated and assessed using dynamic digital simulation. Digital Simulation results validated also the effectiveness of the active filter scheme with modified controller in reducing the source current THD from 25.87% to 0.83% which largely meets the standards of IEEE STD and International Electro-technical Commission (IEC). Digital Simulation and validation used MATLAB-SIMULINK Software Environment.

scholarly journals Unit vector template generator applied to a new control algorithm for an UPQC with instantaneous power tensor formulation, a simulation case study

2020 ◽  
Vol 10 (4) ◽  
pp. 3889
Author(s):  
Yeison Alberto Garcés Gómez ◽  
Nicolás Toro García ◽  
Fredy Edimer Hoyos
Keyword(s):  
Power Quality ◽  
Active Power Filter ◽  
Unit Vector ◽  
Active Power ◽  
Voltage Reference ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Instantaneous Power ◽  
Tensor Formulation ◽  
Power Quality Conditioner

<span>In this paper we present a new algorithm to generate the reference signals to control the series and parallel power inverters in an unified power quality conditioner “UPQC” to enhance power quality. The algorithm is based in the instantaneous power tensor formulation which it is obtained by the dyadic product between the instantaneous vectors of voltage and current in n-phase systems. The perfect harmonic cancelation algorithm “PHC” to estimate the current reference in a shunt active power filter was modified to make it hardy to voltage sags through unit vector template generation “UVGT” while from the same algorithm it extracts the voltage reference for series active power filter. The model was validated by mean of simulations in Matlab-Simulink®.</span>

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