scholarly journals Photovoltaic powered transormerless hybrid converter with active filter for harmonic and reactive power compensation

2018 ◽  
Vol 16 (2) ◽  
pp. 44-51 ◽  
Author(s):  
R. Arulmurugan
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Reactive Power ◽  
Active Filter ◽  
Control Technique ◽  
Unity Power Factor ◽  
Nonlinear Loads ◽  
Control Framework ◽  
Transformer Power ◽  
Coupling Point

This paper proposed a Transformer less Hybrid SEries Active Filter (THSeAF) that upgrade the power quality in single-stage frameworks with steady renewable Photo Voltaic (PV) supply. It strengthens basic loads and carrying on as high-consonant impedance that does not below the critical loads, it cleans power system and guarantees the utilization of unity power factor. Here we manages energy management and power quality issues identified with electric transportation and concentrate on enhancing the electric vehicle load connected to grid. This depends on the Power Factor Correction (PFC) change with harmonic modulation technique that will give advancement of power factor in PFC operation. The control technique was intended to anticipation of current harmonic distortions with the nonlinear loads to control the flow of utility with no standard massive and expensive transformer. Power factor alongside AC side will likewise kept up to some esteem and furthermore dispense with the voltage distortions at the Common coupling point. Here we protecting sensitive loads from voltage twists, swells and sags as for control framework, without the arrangement transformer it is worthwhile for a modern usage. This paper was done with 2-kVA control showing the adequacy of the current topology.

A simulation analysis of PV powered Inc-Cond MPPT based hybrid filter for power quality improvement

2022 ◽  
Vol 13 (1) ◽  
pp. 0-0
Keyword(s):  
Power Quality ◽  
Simulation Analysis ◽  
Control Technique ◽  
Hybrid Filter ◽  
Nonlinear Loads ◽  
Vehicle Load ◽  
Power Quality Improvement ◽  
Transformer Power ◽  
The Common ◽  
Coupling Point

This paper proposed a Transformer less Hybrid Active Filter that upgrade the power quality in single-stage frameworks with steady renewable Photo Voltaic. It strengthens basic loads and carrying on as high-consonant impedance that does not below the critical loads. Manages energy management and power quality issues identified with electric transportation and concentrate on enhancing the electric vehicle load connected to grid. The control technique was intended to anticipation of current harmonic distortions with the nonlinear loads to control the flow of utility with no standard massive and expensive transformer. Power factor alongside AC side will likewise kept up to some esteem and furthermore dispense with the voltage distortions at the Common coupling point.

scholarly journals Voltage Rise Regulation with a Grid Connected Solar Photovoltaic System

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7510
Author(s):  
Akinyemi Ayodeji Stephen ◽  
Kabeya Musasa ◽  
Innocent Ewean Davidson
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Photovoltaic System ◽  
Voltage Amplitude ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
Voltage Rise ◽  
Grid Current

Renewable Distributed Generation (RDG), when connected to a Distribution Network (DN), suffers from power quality issues because of the distorted currents drawn from the loads connected to the network over generation of active power injection at the Point of Common Coupling (PCC). This research paper presents the voltage rise regulation strategy at the PCC to enhance power quality and continuous operation of RDG, such as Photovoltaic Arrays (PVAs) connected to a DN. If the PCC voltage is not regulated, the penetration levels of the renewable energy integration to a DN will be limited or may be ultimately disconnected in the case of a voltage rise issue. The network is maintained in both unity power factor and voltage regulation mode, depending on the condition of the voltage fluctuation occurrences at the PCC. The research investigation shows that variation in the consumer’s loads (reduction) causes an increase in the power generated from the PVA, resulting in an increase in the grid current amplitude, reduction in the voltage of the feeder impedance and an increase in the phase voltage amplitude at the PCC. When the system is undergoing unity power factor mode, PCC voltage amplitude tends to rises with the loads. Its phase voltage amplitude rises above an acceptable range with no-loads which are not in agreement, as specified in the IEEE-1547 and Southern Africa grid code prerequisite. Incremental Conduction with Integral Regulator bases (IC + PI) are employed to access and regulate PVA generation, while the unwanted grid current distortions are attenuated from the network using an in-loop second order integral filtering circuit algorithm. Hence, the voltage rise at the PCC is mitigated through the generation of positive reactive power to the grid from the Distribution Static Compensator (DSTATCOM), thereby regulating the phase voltage. The simulation study is carried out in a MATLAB/Simulink environment for PVA performance.

scholarly journals Direct Power-Based Three-Phase Matrix Rectifier Control with Input Power Factor Adjustment

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1427 ◽  
Author(s):  
Jae-Chang Kim ◽  
Dongyeon Kim ◽  
Sang-Shin Kwak
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Current Source ◽  
Input Power ◽  
Control Technique ◽  
Unity Power Factor ◽  
Light Load ◽  
Active And Reactive Power ◽  
The Given ◽  
Power Factor Control

In a current source rectifier such as a matrix rectifier, input voltage and current cannot be in phase unless an additional input power factor control technique is implemented. This paper proposes such a technique for a matrix rectifier using power-based space vector modulation (SVM). In the proposed method, the modulation index and phase required in order to apply the SVM are calculated based on the active and reactive power of the rectifier for intuitive power factor control. The active power that the rectifier should generate for the regulation of the output inductor current is obtained by the PI (proportional-integral) controller. The reactive power, which is supplied by the rectifier for adjustment of the power factor, is assigned differently depending on the output condition: for the output condition capable of unity power factor, it is set to a negative value of reactive power of the input capacitor, and when the unity power factor is not achievable, it is set with the maximum reactive power the rectifier can generate under the given condition to attain the maximum possible input power factor. It is determined whether the given condition is the light load condition by comparing the absolute value of the reactive power supplied by the input capacitor with the maximum rectifier reactive power that can be produced under the given condition. The SVM based on the active and reactive power of the rectifier in this technique allows the input power factor control to be intuitive and simple. The performance and feasibility of the technique were proved by simulation and experimentation.

scholarly journals Power Quality Improvement for Stable Operation in Renewable Hybrid Power System using Sapfwith Icosф Control Technique

2019 ◽  
Vol 8 (12) ◽  
pp. 1414-1419
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Reactive Power ◽  
Control Technique ◽  
Voltage Source ◽  
Resonance Problem ◽  
Stable Operation ◽  
Shunt Active Power Filter ◽  
Sinusoidal Waveform ◽  
Grid Side

Nowadays Power quality is a extremely main issue. Switching actions of power electronics devices draws reactive power, which causes distortion in current waveform, resulting in harmonics which further leads to capacitor failure, resonance problem and power factor performance etc. Therefore the harmonics are eliminated and the reactive power is compensated in the power supply in the grid side. Passive filters were previously used for removal of harmonics, but due to large resonance problem and effect of source impendence on performance it was dropped. In the proposed model, VSI used as Shunt Active Power Filter is proposed to design as per work producing component of basic current of load (ICos) for providing to eliminate distortion of a sinusoidal waveform by waveforms of different frequencies and power produced by non-work producing component reparation as requested by reactive load drawn non-sinusoidal current from sinusoidal supply. Control circuit of Voltage Source Inverter provided to improve quality of power is performed for various active functioning conditions under non-linear reactive loads. MATLAB / Simulink simulation tool is used to obtain this result. The obtained outputs were within the suggested IEEE-519 standard i.e. less than 5% and also the system power factor is almost unity

scholarly journals An application phase-modular rectifier applied to MMC with medium voltage based on wind turbine generator

2014 ◽  
Vol 3 (3) ◽  
pp. 378
Author(s):  
Narin Watanakul
Keyword(s):  
Power Control ◽  
Wind Turbine ◽  
Power Quality ◽  
Power Factor ◽  
Reactive Power ◽  
Current Phase ◽  
Unity Power Factor ◽  
Turbine Generator ◽  
Medium Voltage ◽  
Wind Turbine Generator

This paper proposes two stages of controller. First stage, direct power control (P-Q control) applied single-phase structure of multilevel modular converter (MMC) , multilevel cascaded H-Bridge inverter with 9-level SPWM injection to medium voltage (24kV) based on wind turbine generator (PMSG)rated capacity 25kVA. Second stage, three-phase PFC rectifier with phase-modular Y-rectifier, boosttype. The separate dc sources (DC-links) average voltage at 178V (Vdc1-Vdc12). This study is concerned with the application, operating, principle, and design example. The unity power factor operation of PMSG is realized by controlling of phase-modular Y-Rectifier system, and the current waveform distortion results increase of the lower harmonics distortion. The P-Q controller can make it possible of the grid line current phase by providing the direct instantaneous power control in the steady state under the active power and reactive power command. The data collected by PSIM and MATLAB simulation are used in comparison with the experimental tester of results. This provides guideline to further analyze and improvement energy efficiency and power quality in electrical system pertinent to wind turbine generator (PMSG). Keywords: Wind Turbine Generator, Permanent Magnet Synchronous Generator (PMSG), Phase-Modular Y-Rectifier, Cascaded H-Bridges, Modular Multilevel Converter (MMC), Power Quality, Unity Power Factor, Harmonics.

Design of Solar Pv Based Shunt Active Filter for Nonlineasr Load

2019 ◽  
Vol 1 (3) ◽  
pp. 40-47
Author(s):  
Mohamed jaidu Mansoor ◽  
Ranjith Kumar
Keyword(s):  
Power Quality ◽  
Reactive Power ◽  
Active Filter ◽  
Current Control ◽  
Control Technique ◽  
Solar Pv ◽  
Nonlinear Load ◽  
Zero Crossing ◽  
Shunt Active Filter ◽  
Photovoltaic Array

Elevation of power electronics technology, converter are the main causes for power quality issues, because of their high switching characteristics.so to reduce the harmonics injected by the nonlinear load, the filters are play a major role to improve a power quality improvement, particularly shunt active filter is more reliable for reduce a harmonic in power system network. This novel technique proposed for design a shunt active filter with solar photovoltaic array integrated into nonlinear load using a Point of Common Coupling (PCC) technique. Zero crossing detection technique are used to extract the magnitude of a fundamental active components of distorted load currents. The estimation of harmonic isolator and current compensation are controlled by Field Programmable Gate Array (FPGA) controller, different types of compensation techniques are used in this work Synchronous reference frame theory, instantaneous reactive power theory (PQ) and hysteresis current control technique. These techniques enable extraction of active power, regulates a load voltage and maintain a phasor sequence at PCC under the voltage sag and swell. Simulation is carried out by MATLAB/SIMULINK for different compensations techniques and Total Harmonics Distortion (THD) values are tabulated.

scholarly journals Hybrid Reference Current Generation Theory for Solar Fed UPFC System

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1527
Author(s):  
R. Senthil Kumar ◽  
K. Mohana Sundaram ◽  
K. S. Tamilselvan
Keyword(s):  
Neural Network ◽  
Power Factor ◽  
Reactive Power ◽  
Voltage Source ◽  
Unity Power Factor ◽  
Current Generation ◽  
Load Voltage ◽  
Reference Current Generation ◽  
Source Current

The extensive usage of power electronic components creates harmonics in the voltage and current, because of which, the quality of delivered power gets affected. Therefore, it is essential to improve the quality of power, as we reveal in this paper. The problems of load voltage, source current, and power factors are mitigated by utilizing the unified power flow controller (UPFC), in which a combination of series and shunt converters are combined through a DC-link capacitor. To retain the link voltage and to maximize the delivered power, a PV module is introduced with a high gain converter, named the switched clamped diode boost (SCDB) converter, in which the grey wolf optimization (GWO) algorithm is instigated for tracking the maximum power. To retain the link-voltage of the capacitor, the artificial neural network (ANN) is implemented. A proper control of UPFC is highly essential, which is achieved by the reference current generation with the aid of a hybrid algorithm. A genetic algorithm, hybridized with the radial basis function neural network (RBFNN), is utilized for the generation of a switching sequence, and the generated pulse has been given to both the series and shunt converters through the PWM generator. Thus, the source current and load voltage harmonics are mitigated with reactive power compensation, which results in attaining a unity power factor. The projected methodology is simulated by MATLAB and it is perceived that the total harmonic distortion (THD) of 0.84% is attained, with almost a unity power factor, and this is validated with FPGA Spartan 6E hardware.

Power Quality Issues and Solutions – Review

2015 ◽  
Vol 16 (4) ◽  
pp. 357-384 ◽  
Author(s):  
Suresh Mikkili ◽  
Anup Kumar Panda
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution Systems ◽  
Reactive Power ◽  
Electrical Power ◽  
Economic Loss ◽  
Nonlinear Loads ◽  
Broad Perspective ◽  
Three Phase ◽  
Quality Issues

Abstract Electrical power quality has been an important and growing problem because of the proliferation of nonlinear loads such as power electronic converters in typical power distribution systems in recent years. Particularly, voltage harmonics and power distribution equipment problems result from current harmonics produced by nonlinear loads. The Electronic equipment like, computers, battery chargers, electronic ballasts, variable frequency drives, and switch mode power supplies, generate perilous harmonics and cause enormous economic loss every year. Problems caused by power quality have great adverse economic impact on the utilities and customers. Due to that both power suppliers and power consumers are concerned about the power quality problems and compensation techniques. Power quality has become more and more serious with each passing day. As a result active power filter gains much more attention due to excellent harmonic and reactive power compensation in two-wire (single phase), three-wire (three-phase without neutral), and four-wire (three-phase with neutral) ac power networks with nonlinear loads. However, this is still a technology under development, and many new contributions and new control topologies have been reported in the last few years. It is aimed at providing a broad perspective on the status of APF technology to the researchers and application engineers dealing with power quality issues.

scholarly journals Enhancing the LVRT Capability and Mitigation of Power Quality Issues Using UPQC of a Grid Connected Wind Conversion System

2017 ◽  
Vol 7 (3) ◽  
pp. 643
Author(s):  
C.S Boopathi ◽  
Kuppusamy Selvakumar ◽  
Avisek Dutta
Keyword(s):  
Power Quality ◽  
Reactive Power ◽  
Low Voltage ◽  
Active Filter ◽  
Shunt Active Filter ◽  
Unified Power Quality Conditioner ◽  
Conversion System ◽  
Quality Issues ◽  
Power Quality Conditioner ◽  
Doubly Fed

In this paper unified power quality conditioner has been used to enhance low voltage ride through capability of grid connected wind conversion system taking Doubly fed induction generator (DFIG). Unified Power quality conditioner (UPQC) device is a combination of series active filter and shunt active filter. This custom power device is mainly used to mitigate power quality issues which is an essential factor today because of wide application of power electronics devices. UPQC is capable to deal with voltage and current imperfection simultaneously. It is installed in the system mainly to improve the power quality i.e. Voltage sag/swell, Harmonics, reactive power compensation etc. at point of common coupling. System is modeled in MATLAB/SIMULINK and results shows utilization of UPQC for the enhancement of LVRT of a DFIG wind system according to Grid code. when fault occurs in the system, it will create voltage dip and series compensator of UPQC injects during this time to prevent disconnection from grid and stay connected to contribute during fault. UPQC is also used for fast restoration of system steady state, power factor improvement, prevent rotor over current.

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