Power quality enrichment using enhanced adaptive control-detuned-LC proposal in voltage source control conquered distributed generation with hardware implementation

2018 ◽  
Vol 41 (9) ◽  
pp. 2451-2464
Author(s):  
Moushumi Patowary ◽  
Gayadhar Panda ◽  
Bimal C Deka
Keyword(s):  
Reactive Power ◽  
Adaptive Controller ◽  
Comparative Assessment ◽  
Source Control ◽  
Voltage Source ◽  
Current Harmonics ◽  
Point Of Common Coupling ◽  
Artificial Neural Network Ann ◽  
Lc Filter ◽  
Total Impedance

This paper presents the collective operation and comparative assessment of artificial neural network (ANN)-based adaptive controller with detuned-inductor capacitor (LC) filter facility in grid-tied voltage source control (VSC) system. In order to facilitate proper shaping of VSC outputs and to avoid voltage surge or current surge issues that may occur during the synchronization, the controlling action should reflect importance of total impedance (Zt) effect for: (i) accurate online weight updating, (ii) generation of correct references for proper shaping of VSC outputs, (iii) accurate assessment and exclusion of current harmonics and (iv) robust in defending any system perturbation. This impedance is taken into consideration during the run-time weight updation process through extended control steps in order to pass over various losses that certainly occurs in transformers, filters, line parameters and so forth. Performance of the system is well improved with an inclusion of total impedance (Zt) measured between the VSC and point of common coupling (PCC). A detuned-LC filter is predominantly intended for reactive power compensation, power factor correction, prompt and accurate alleviation of the harmonics. A comparative assessment in between enhanced and conventional adaptive controllers that are designed in MATLAB/Simulink clarifies the robust performances of the proposed control design under sundry system turbulences. The verification of the proposed enhanced controller is approved with the hardware results obtained using dSPACE RTI 1202 kit.

Solar PV Based Shunt Active Filter with p-q Theory Control for Improvement of Power Quality

2017 ◽  
Vol 26 (09) ◽  
pp. 1750133 ◽  
Author(s):  
R. Balamurugan ◽  
R. Nithya
Keyword(s):  
Fuzzy Logic Controller ◽  
Reactive Power ◽  
Salient Feature ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Solar Pv ◽  
Pv System ◽  
Shunt Active Power Filter ◽  
Shunt Active Filter ◽  
Point Of Common Coupling

In this paper, fuzzy logic controller (FLC)-based three-phase shunt active power filter with photovoltaic (PV) system is proposed. This filter comprises voltage source converter (VSC) with DC link capacitor at the input side and is supplied by PV system. The salient feature of the filter is that it provides reactive power compensation with line current harmonic reduction and also neutral compensation at point of common coupling (PCC). The PV system and a battery are connected with VSC through DC–DC converter. This paper also proposes a control algorithm using instantaneous [Formula: see text]-[Formula: see text] theory that generates a reference current to counteract the harmonics. The FLC controls the DC link voltage in reference to the above reference current. The performance of the proposed filter for compensation is confirmed by using the MATLAB/Simulink environment and results are validated.

scholarly journals Simulation, Design, and Analysis of 3-Level Shunt Active Harmonic Filter using T-Typed NPC (TNPC) Topology

10.29007/s9ch ◽  
2018 ◽  
Author(s):  
Mitrajsinh Janaksinh Chudasama ◽  
Prof. Dr. P. N. Tekwani ◽  
Siddharthsingh K Chauhan ◽  
Vinod Patel
Keyword(s):  
Reactive Power ◽  
Simulation Design ◽  
Current Harmonics ◽  
Synchronous Reference Frame ◽  
Three Phase ◽  
Harmonic Filter ◽  
Non Linear ◽  
Point Of Common Coupling ◽  
Switched Mode Power Supply ◽  
Parallel Resonance

Power quality at the source side deteriorates due to current harmonics which are introduced in the power system by non-linear loads, originating a vital difficulty. Rectifiers, variable speed drive, switched mode power supply, etc. types of non-linear loads create such harmonics. Con- ventional technique to eliminate such harmonics is use of passive filters but this technique has the disadvantage of series and parallel resonance within the network impedance, overcompen- sation of reactive power at fundamental frequency and poor flexibility. Shunt Active Harmonic Filters (SAHF) are generally used to reduce current harmonics. The active harmonic filters introduce remunerating currents into the source to neutralize the harmonics possessed by the load current. The compensating currents will be derived by sensing three-phase voltages at the Point of Common Coupling (PCC) and load currents. Efforts are made in this study to ana- lyze Fast Fourier Transform (FFT) algorithm, Instantaneous Reactive Power (IRP) technique, and Synchronous Reference Frame (SRF) technique used to derive the reference compensating currents. These compensating currents act as reference currents for the fixed switching based current controllers which generate control signals for the SAHF employing three-level T-type Neutral Point Clamped (TNPC) topology of converter.

scholarly journals The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 831 ◽  
Author(s):  
Janeth Alcalá ◽  
Víctor Cárdenas ◽  
Alejandro Aganza ◽  
Jorge Gudiño-Lau ◽  
Saida Charre
Keyword(s):  
Reactive Power ◽  
Harmonic Distortion ◽  
Reactive Power Compensation ◽  
Active Power ◽  
Performance Criteria ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Current Harmonics ◽  
Current Harmonic ◽  
Harmonic Filtering

Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

Decoupled Control Strategy of Grid Interactive Inverter System with Optimal LCL Filter Design

2013 ◽  
Vol 14 (5) ◽  
pp. 477-486 ◽  
Author(s):  
B. Chitti Babu ◽  
Anup Anurag ◽  
Tontepu Sowmya ◽  
Debati Marandi ◽  
Satarupa Bal
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Filter Design ◽  
Dynamic Performance ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Lcl Filter ◽  
Current Harmonics ◽  
Switching Losses ◽  
Active And Reactive Power

Abstract This article presents a control strategy for a three-phase grid interactive voltage source inverter that links a renewable energy source to the utility grid through a LCL-type filter. An optimized LCL-type filter has been designed and modeled so as to reduce the current harmonics in the grid, considering the conduction and switching losses at constant modulation index (Ma). The control strategy adopted here decouples the active and reactive power loops, thus achieving desirable performance with independent control of active and reactive power injected into the grid. The startup transients can also be controlled by the implementation of this proposed control strategy: in addition to this, optimal LCL filter with lesser conduction and switching copper losses as well as core losses. A trade-off has been made between the total losses in the LCL filter and the Total Harmonic Distortion (THD%) of the grid current, and the filter inductor has been designed accordingly. In order to study the dynamic performance of the system and to confirm the analytical results, the models are simulated in the MATLAB/Simulink environment, and the results are analyzed.

scholarly journals A Review on Shunt Active Power Filter Control Strategies

2018 ◽  
Vol 7 (4.5) ◽  
pp. 121 ◽  
Author(s):  
Harnek Singh ◽  
Maneet Kour ◽  
Dip Vinod Thanki ◽  
Prakash Kumar
Keyword(s):  
Reactive Power ◽  
Control Strategies ◽  
Active Power Filter ◽  
Voltage Regulation ◽  
Active Power ◽  
Current Control ◽  
Voltage Source ◽  
Shunt Active Power Filter ◽  
Current Harmonics ◽  
Power Filter

Shunt active power filter (SAPF) has now become a well-known sophisticated technology to overcome current harmonics and reactive power compensation issues. In this paper a technical review of various control strategies for operation of SAPF has been presented. Control strategies such as reference current generation by time domain, frequency domain and soft computing approaches; voltage control for dc link voltage regulation and current control for generating switching patterns for voltage source inverter has been discussed. This paper aims to provide a broad understanding on SAPFs for various research and engineering applications.  

scholarly journals National Grid Connected 3-Phase Inverter based on Photovoltaic Solar System

2020 ◽  
Vol 26 (12) ◽  
pp. 21-43
Author(s):  
Karam Abdulwahed Kashan ◽  
Fadhil Abbas Al-Qrimli
Keyword(s):  
Reference Frame ◽  
Reactive Power ◽  
Maximum Power ◽  
Voltage Source ◽  
Duty Ratio ◽  
Power Fluctuation ◽  
Pv System ◽  
Maximum Power Point ◽  
Power Point ◽  
Lc Filter

In this paper, a national grid-connected photovoltaic (PV) system is proposed. It extracts the maximum power point (MPP) using three-incremental-steps perturb and observe (TISP&O) maximum power point tracking (MPPT) method. It improves the classic P&O by using three incremental duty ratio (ΔD) instead of a single one in the conventional P and O MPPT method. Therefore, the system's performance is improved to a higher speed and less power fluctuation around the MPP. The Boost converter controls the MPPT and then is connected to a three-phase voltage source inverter (VSI). This type of inverter needs a high and constant input voltage. A second-order low pass (LC) filter is connected to the output of VSI to reduce the total harmonic distortion (THD) of the output current. The LC filter is then connected to a step-up transformer to push up the low VSI output voltage to the high grid voltage level. The control strategy is based on the rotating reference frame (dq reference frame) and the grid phase shift angle extracted using a phase-locked loop (PLL) technique. The designed PV system supplies only active power with zero reactive power to the utility grid. The system is simulated using MATLAB / Simulink software.  

scholarly journals ANN Current Controller Based on PI-Fuzzy Adaptive System for Shunt Power Active Filter

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Moulay Tahar Lamchich
Keyword(s):  
Reactive Power ◽  
Adaptive System ◽  
Control Method ◽  
Average Power ◽  
Active Filter ◽  
Voltage Source ◽  
Nonlinear Loads ◽  
Shunt Active Filter ◽  
Current Harmonics ◽  
Fuzzy Adaptive

This paper deals with the use of triphase shunt active filter which is able to compensate current harmonics, reactive power, and current unbalance produced by nonlinear loads. To perform the identification of disturbing currents, a very simple control method is introduced. It’s formed by a DC voltage regulator and a balance between the average power of load and the active power supplied by the grid. The output current of the voltage source inverter (VSI) must track the reference current. This is done by a neural controller based on a PI-Fuzzy adaptive system as reference corrector. Also to regulate the DC link capacitor voltage a fuzzy logic adaptive PI controller is used.

scholarly journals Analytical Approach to Circulating Current Mitigation in Hexagram Converter-Based Grid-Connected Photovoltaic Systems Using Multiwinding Coupled Inductors

2018 ◽  
Vol 2018 ◽  
pp. 1-22 ◽  
Author(s):  
Abdullrahman A. Al-Shamma’a ◽  
Abdullah M. Noman ◽  
Khaled E. Addoweesh ◽  
Ayman A. Alabduljabbar ◽  
A. I. Alolah
Keyword(s):  
Reactive Power ◽  
Voltage Drop ◽  
Voltage Source ◽  
Leakage Inductance ◽  
Coupled Inductors ◽  
Circulating Current ◽  
Current Path ◽  
Controller Performance ◽  
Terminal Voltage ◽  
Total Impedance

The hexagram multilevel converter (HMC) is composed of six conventional two-level voltage source converters (VSCs), where each VSC module is connected to a string of PV arrays. The VSC modules are connected through inductors, which are essential to minimize the circulating current. Selecting inductors with suitable inductance is no simple process, where the inductance value should be large to minimize the circulating current as well as small to reduce an extra voltage drop. This paper analyzes the utilization of a multiwinding (e.g., two, three, and six windings) coupled inductor to interconnect the six VSC modules instead of six single inductors, to minimize the circulating current inside the HMC. Then, a theoretical relationship between the total impedance to the circulating current, the number of coupled inductor windings, and the magnetizing inductance is derived. Owing to the coupled inductors, the impedance on the circulating current path is a multiple of six times the magnetizing inductance, whereas the terminal voltage is slightly affected by the leakage inductance. The HMC is controlled to work under variable solar radiation, providing active power to the grid. Additional functions such as DSTATCOM, during daytime, are also demonstrated. The controller performance is found to be satisfactory for both active and reactive power supplies.

scholarly journals Developing a grid-connected DFIG strategy for the integration of wind power with harmonic current mitigation

2019 ◽  
Vol 9 (5) ◽  
pp. 3905
Author(s):  
Hacil Mahieddine ◽  
Laid Zarour ◽  
Louze Lamri ◽  
Nemmour Ahmed Lokmane
Keyword(s):  
Power Flow ◽  
Pulse Width Modulation ◽  
Reactive Power ◽  
Voltage Source ◽  
Switching Frequency ◽  
Non Linear Load ◽  
The Moment ◽  
Grid Side ◽  
Lc Filter ◽  
Bidirectional Power Flow

<p>The aim of this paper is to present a study of the efficiency of the electrical part of a wind generation system. Two back-to-back PWM voltage-fed inverters connected between the stator and the rotor are used to allow bidirectional power flow. The second inverter grid side, has a role of a power active filter, to eliminate the harmonic generated by the non linear load, in the same time gives an active and reactive power needed by the rotor of DFIG. The harmonics of switching frequency in the current stator, pose a major problem in the moment where commutations in the diode bridge, to solve this problem, we introduce a small-sized passive LC filter for the purpose of eliminating high-frequency shaft voltage and grid current from a DFIG driven by a voltage-source pulse width-modulation rotor inverter controlled with SVM. The control theory is discussed, and the controller implementation is described. Design criteria are also given. The results of simulation tests show excellent static and dynamic performances.</p>

scholarly journals An advanced static var compensator based on a three level IGBT inverter modelling analysis and active power filtering

2012 ◽  
Vol 63 (6) ◽  
pp. 392-396 ◽  
Author(s):  
Azeddine Draou
Keyword(s):  
Reactive Power ◽  
Dynamic Performance ◽  
Active Power ◽  
Voltage Source ◽  
Static Var Compensator ◽  
Robust Controller ◽  
Current Harmonics ◽  
Power Filter ◽  
Modelling Analysis ◽  
Dynamic Performance Analysis

This paper presents the dynamic performance analysis of an Advanced Static Var Compensator (ASVC) using three-level neutral point-clamped voltage source inverter. The paper presents the principles of operating and the method of reference currents generation. The dynamic behaviour of the system is further analysed using Matlab/Simulink with SimPower Systems toolbox through a set of simulation tests. The results obtained have been applied to an active power filter which might lead to the design of a robust controller for current harmonics and reactive power applications

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