Filter For Power Quality Improvement Research Articles

Split‐source inverter with adaptive control scheme‐based shunt active power filter for power quality improvement

AbstractAlthough single‐stage inverters are popular for simpler design they face difficulties in shoot‐through mode operation. Insufficient DC voltage regulation and complicated LC network are principal drawbacks of these topologies. A new split source inverter (SSI) can solve problems with single‐stage inverters. In this paper, SSI replaced the voltage source inverter (VSI) of a shunt active power filter (SAPF) which alleviates power quality (PQ) issues in power system. Furthermore, a VSI‐based SAPF faces challenges to maintain consistent voltage across DC‐link capacitor, exactly compensating current generation, and switching loss reduction in inverter. This study examined efficacy of two inverter‐based SAPFs considering a modified synchronous reference frame approach for generating reference current; fuzzy logic controller for regulating DC‐link voltage; and adaptive fuzzy hysteresis current controller for generating switching pulses. Ideal and non‐ideal sources were considered when running the simulations for various load circumstances. The proposed SSI‐based SAPF with an advanced control approach can eradicate source current harmonics to 0.52% and 0.45% under ideal source conditions, and 0.65% and 0.54% under non‐ideal source conditions for non‐linear loads. Similarly, the ripples in the DC‐link voltage are also reduced to 2–3 V for the ideal case and 4–5 V for non‐ideal case.

Control and mathematical design of PV-based renewable energy systems for LCL-SR filter-based power quality improvement

Power quality challenges arise when photovoltaic (PV) systems are integrated into power networks. This research work examines the control and mathematical design of an LCL-SR (series resistance) filter for power quality improvement in PV-based sustainable energy systems to meet this difficulty. Power quality may be improved via an LCL filter in grid-connected systems. A non-linear load-connected PV system incorporates a variety of power electronics controllers, including an MPPT controller, battery controller, and inverter current controller, which introduce harmonics into the grid. A passive filter, LCL-SR, is suggested for PV applications that interact with voltage source inverters and the utility grid or electric load to reduce harmonics. A detailed mathematical modeling is presented to design an LCL-SR filter, and its performance is evaluated under different load conditions in terms of THD (Total Harmonics Distortion) and efficiency. LCL-SR filter has 4.32% THD but in the case of LCL filter with parallel R is less THD, which is 3.61%. In terms of efficiency and THD LCL-SR is best among all compared filters which have THD is 4.32% along with an efficiency is 75.95%. The results are compared without a filter, and different configurations of LCL-SR are simulated to show the effectiveness of the proposed filter for PV & residential applications.

Shunt Active Power Filter for Power Quality Improvement of Renewable Energy Systems: A Case Study

This paper introduces an application of an active power filter (APF) in a real industrial zone smart grid for power quality (PQ) improvement issues. The random harmonics generated by on-grid PV inverters and non-linear loads that represent the topology of the industrial smart grid are mitigated, also the reactive power, voltage levels, and power factor were adjusted using a shunt active power filter (SAPF). Detailed design of APF and its hysterics control strategy were presented using the MATLAB/SIMULINK software package. The results prove that SAPF is an effective device to mitigate total harmonic distortion (THD), and has a fast dynamic response to regulate the grid's power factor (PF).

Shunt Active Power Filter for Power Quality Improvement and Comparative Study with FFT Analysis

Shunt Active Power Filter for Power Quality Improvement and Comparative Study with FFT Analysis

SRF theory-based shunt active power filter for power quality improvement in grid-interfaced solar photovoltaic system

This paper uses Shunt Active Power Filter (SAPF) in a polluted and unbalanced mains voltage for the compensation of current harmonics along with the reactive power. During compensation the reference current is calculated by the theory of Synchronous Reference Frame (SRF). This study utilizes the Photovoltaic (PV) energy, a renewable energy source, for which a maximum power point tracking (MPPT) method, an incremental conductance (InCnd), is employed. To modify the energy storage of dc-voltage, an artificial neural network controller (ANN) is used. The power system toolbox of MATLAB/SIMULINK is used to simulate the system being proposed. The SAPF is compared and assessed on the basis of PI control, FUZZY controller, and Artificial Neural Network (ANN). The results demonstrate the ANN control’s efficiency in optimizing the DC capacitor energy storage, sinusoidal form of the current, and reactive power compensation. A low Total Harmonic Distortion (THD) will be achieved with the proposed system which shows the efficacy of the method presented.

Particle Swarm Optimization tuned Hybrid Sliding Mode Controller based static synchronous compensator with LCL filter for Power Quality improvement

One of the supreme striking areas in electrical system design is power quality analysis and its associated problems. All the electronic devices are exceptionally susceptible to a slight variation in the power supply. Among the Flexible Alternating Current Transmission System (FACTS) devices, the Static Synchronous Compensator (STATCOM) is the most effective device, since it has much faster dynamic response for the load changes. A PSO Optimized Hybrid Sliding Mode Controller based STATCOM with LCL Filter is used in the proposed work for enhancing power factor and decreasing the Total Harmonic Detection (THD) value. The Sliding Mode Controller (SMC) is used to operate this STATCOM, power quality was tuned using the PSO technique. The effectiveness of the conventional PI controller with SMC in regulating reactive power at the Point of Common Coupling (PCC) is compared with the proposed SMC-based controller. Applying soft computing techniques for efficient grid integration and cleaner energy production is the aim of this research. The overall design and analysis are done in MATLAB Simulink with nonlinear and unbalanced loads. With the proposed controller, the power factor is improved to 0.98 with the THD of 2.35 % for nonlinear inductive load. The proposed controller outperforms well with the 2.66 % overshoot and 5.61 ms settling time.

Hybrid Active Power Filter for Power Quality Improvement

A Deadbeat current controller for an LC-coupling hybrid active power filter is proposed, which can track with the reference compensation current with low steady- state error and fast dynamic response. Moreover, it can lead Hybrid Active power Filter to be operating at a fixed switching frequency with low output current ripples, thus reducing the size of the filtering circuit. The stability issue and parameter design of the proposed deadbeat current controller are analyzed and discussed. Finally, the compensating performance of the deadbeat current controller for the Hybrid Active Power Filter (LC-HAPF) is verified by simulation compared with the conventional hysteresis bandwidth modulation control, the proportional-integral (PI) control, and the proportional multi-resonant control for the LC-HAPF, which shows its effectiveness and superior compensating performances.

On a Matlab/Simulink of Power Quality Issues in Distribution System with the Presence of Electric Arc Furnaces and Mitigation Solution Using Active Filter

The non-linearity of the conductance of the electric arc furnace causes voltage flicker and harmonics in power systems. Nowadays, the application of electric arc furnaces in the steel production industry in Vietnam also results in the aforementioned power quality issues and it has been critical to find appropriate solutions for mitigation of those issues recently. This paper develops a time-domain simulation of electric arc furnace that can show power quality issues such as voltage flicker and harmonics in the distribution system and the solution using an active filter for power quality improvement in MATLAB/SIMULINK and thus, it is possible to assess the influences of different parameters of electric arc furnace on the design of active filter. The comparison of simulation results and experimental results obtained from the distribution system of the factory of Thien Phat Company has been conducted.

A Simulation Analysis of a PV-Powered Inc-Cond MPPT-Based Hybrid Filter for Power Quality Improvement

This paper proposed a transformer-less hybrid active filter that upgrades 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 lower the critical loads. It manages energy management and power quality issues identified with electric transportation and concentrates on enhancing the electric vehicle load connected to the grid. The control technique was intended to anticipate 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 keep up some esteem and furthermore dispense with the voltage distortions at the common coupling point.

Optimal Design of Shunt Active Power Filter for Power Quality Improvement and Reactive Power Management Using nm-Predator Prey Based Firefly Algorithm

Optimal Design of Shunt Active Power Filter for Power Quality Improvement and Reactive Power Management Using nm-Predator Prey Based Firefly Algorithm

Performance assessment of PV integrated model predictive controller-based hybrid filter for power quality improvement

Performance assessment of PV integrated model predictive controller-based hybrid filter for power quality improvement

Performance assessment of PV integrated model predictive controller-based hybrid filter for power quality improvement

Performance assessment of PV integrated model predictive controller-based hybrid filter for power quality improvement

Fuzzy particle swarm optimization control algorithm implementation in photovoltaic integrated shunt active power filter for power quality improvement using hardware-in-the-loop

This paper proposes a hybrid fuzzy particle swarm optimization (FPSO) technique with a photovoltaic fed shunt active power filter (SAPF) to improve power quality and deliver clean electricity. Maximum power point tracking (MPPT) is achieved using the FPSO system, and synchronous reference frame theory-based SAPF is controlled using fuzzy logic. The FPSO tracks the MPP using duty cycle control and to extract the maximum power, the MPPT algorithm adjusts the duty cycle of a boost converter. A SAPF connects the boost converter output to the grid. The system response compared with a conventional control algorithm. The proposed control scheme was simulated and real-time tested on the Hardware-in-the-Loop using OPAL-RT 4510 system. The planned system has a total harmonic distortion of 2.22% and a sampling time of 30 μs. The results reveal that the proposed controller performs well under various load conditions.

Control of grid-connected residential solar-PV system using novel adaptive linear combiner filter for power quality improvement

ABSTRACT A grid-connected residential photovoltaic (PV) system has been proposed using novel adaptive linear combiner filter-based control for power quality (PQ) improvement. In the present work, novel adaptive linear combiner (ALC) filter-based control-based control has been proposed to generate reference current. MATLAB/Simulink software is used to develop the two-stage grid-connected residential PV. The proposed control is tested in MATLAB/Simulink2018(a) under nonlinear, linear load and variable input and validated experimentally on prototype hardware. The performance of the proposed ALC filter-based control has been analyzed and compared with that of conventional synchronous d-q control. It has been observed from results that THD in grid current using proposed control is 3.74% whereas using conventional d-q control THD is 4.75%. Proposed control provides more efficient performance by improving the PQ of the system by compensating the harmonics and reactive load demand. Harmonic distortion in the grid current is within the limits as per IEEE-1547. Furthermore, proposed control has better transient response viz. settling time, under shoot and overshoot in DC link voltage during grid connection of rooftop PV system and provides, reduced complexity due to absence of phase lock loop (PLL), thus less sampling time, better accuracy, ease of implementation, and adaptability.

Hardware-in-the-Loop Implementation and Performance Evaluation of Three-Phase Hybrid Shunt Active Power Filter for Power Quality Improvement

The excessive use of nonlinear load causes electric current harmonics that ultimately downgrades the electrical power quality. If a failure exists due to internal integration of a power system in any one of the internal networks, it causes uncomplimentary consequences to the entire power system’s performance. This paper proposed a hybrid shunt active harmonic power filter (HSAHPF) design to reduce harmonic pollution. A digital controller HIL simulator has been modeled using a three-phase voltage source inverter to test the efficiency of HSAHPF and the performance of control algorithms. Moreover, the instantaneous active and reactive current theory (Id − Iq) and instantaneous active and reactive power theory (Pq0) control algorithms are implemented for the reference current generation in HSAHPF, resulting in reduced harmonic distortions, power factor improvement for a balanced nonlinear load. The control algorithms are further employed in Arduino MEGA to keep the factor of cost-effectiveness. The simulation of the proposed design has been developed in Simulink. The validation and testing of HSAHPF using controller HIL simulation prove the control algorithms’ ability to run in a portable embedded device. The statistical analysis of the proposed system response provides a minimum total harmonic distortion (THD) of 2.38 from 31.74 that lies in IEEE 519-1992 harmonic standards with an improved stability time of 0.04 s. The experimental verification and provided results of the HIL approach validate the proposed design. Significant mitigation of harmonics can be observed, consequently enhancing the power quality with power factor near unity.

A Comprehensive Survey on Different Control Strategies and Applications of Active Power Filters for Power Quality Improvement

Power quality (PQ) has become an important topic in today’s power system scenario. PQ issues are raised not only in normal three-phase systems but also with the incorporation of different distributed generations (DGs), including renewable energy sources, storage systems, and other systems like diesel generators, fuel cells, etc. The prevalence of these issues comes from the non-linear features and rapid changing of power electronics devices, such as switch-mode converters for adjustable speed drives and diode or thyristor rectifiers. The wide use of these fast switching devices in the utility system leads to an increase in disturbances associated with harmonics and reactive power. The occurrence of PQ disturbances in turn creates several unwanted effects on the utility system. Therefore, many researchers are working on the enhancement of PQ using different custom power devices (CPDs). In this work, the authors highlight the significance of the PQ in the utility network, its effect, and its solution, using different CPDs, such as passive, active, and hybrid filters. Further, the authors point out several compensation strategies, including reference signal generation and gating signal strategies. In addition, this paper also presents the role of the active power filter (APF) in different DG systems. Some technical and economic considerations and future developments are also discussed in this literature. For easy reference, a volume of journals of more than 140 publications on this particular subject is reported. The effectiveness of this research work will boost researchers’ ability to select proper control methodology and compensation strategy for various applications of APFs for improving PQ.

An Intelligent PI Controller-Based Hybrid Series Active Power Filter for Power Quality Improvement

The quality of power that is degrading day by day is an important issue for all the consumers. The important factor for this is harmonics in the voltage and current waveforms which can be resolved by the use of hybrid series active power filter. The combination consists of a series active power filter and a shunt passive filter connected in parallel to the load. The method used in this paper is for the purpose of achieving good harmonic compensation and reduced total harmonic distortion for various types of nonlinear loads as per the standards of IEEE 519. The proposed HSAPF technique uses the synchronous reference frame method for generating the compensating signal with an intelligent PI controller that uses particle swarm optimization (PSO) technique to obtain the required gain values needed to improve the steady state response of the system. The concept of vigorous HSAPF has been authenticated through MATLAB simulation analysis, and the results obtained validate the accuracy of the method for the different load conditions.

Simulation and Analysis of a Three-phase Shunt Active Power Filter

This paper presents the simulation based study and results of three-phase shunt active power filter for power quality improvement. The power quality of the power systems is degraded because of the harmonic resonances between series inductance of the lines and shunt capacitors at load end. The system is modeled and simulated using MATLAB-Simulink workspace. The ultimate goal of this study is to improve the total harmonic distortion of the system as per the standards defined by IEEE-519.

Simulation and Analysis of a Three-phase Shunt Active Power Filter

This paper presents the simulation based study and results of three-phase shunt active power filter for power quality improvement. The power quality of the power systems is degraded because of the harmonic resonances between series inductance of the lines and shunt capacitors at load end. The system is modeled and simulated using MATLAB-Simulink workspace. The ultimate goal of this study is to improve the total harmonic distortion of the system as per the standards defined by IEEE-519.

Optimal Design of Shunt Active Power Filter for Power Quality Improvement Based on Virtual Experimental Filter Technique

Optimal Design of Shunt Active Power Filter for Power Quality Improvement Based on Virtual Experimental Filter Technique