Most of the power quality problems are introduce by the power electronics. Simulation results of a shunt active power filter using p. Simulation results of a shunt active power filter using pq. This to certify that the thesis titled performance enhancement of active power filter using robust control strategies, by mr. A shunt active power filter generates a harmonic current that must have equal magnitude but opposite phase to compensate the current harmonics that means the phase is shifted by 1800.
Jul 15, 20 shunt active power filter model based on 400volts 3 phase 3 wire system. It not only mitigates harmonics within the allowable limits defined by ieee std 5191992, but also compensates unbalancing and reactive power in the system. The configuration of a system with shunt active filter. Due to nonlinear loads harmonics mainly occurs in current signal, so in this paper a shunt active power filter is used. Shunt active power filter model based on 400volts 3 phase 3 wire system. Summary shunt active power filters apfs are used to compensate the power quality problems of harmonic currents of various harmonics.
Matlabsimulink model based shunt active power filter using. Shunt active power filter thesis pdf to the best of my knowledge, the matter embodied in the thesis has not been submitted to any. Nonlinear current control scheme of shunt active power filter. This reconsider can furthermore be considered as a tutorialtype. Shunt active power filtershapes of load, source and desired. Active power filter controller for harmonic suppression in industrial distribution system. Overview deltas active power filter apf2000 is your key to a clean grid for more efficient production. Shunt active power filter and its application ieee xplore. Proper selection of passive and active power quality.
Design of shunt active power filter to eliminate the. Active power filter controller for harmonic suppression in. In this case, the shunt active power filter operates as a current source injecting the harmonic components generated by the load but phase shifted by 180 degrees. The series lc filter used in the proposed system results in an increase on the current flowing through the active power filter.
Pdf shunt active filter for power quality improvement. This paper describes the development of a low cost shunt active power filter with digital control, which allows dynamic power factor correction and both. Active power filter for threephase current harmonic. Shunt active power filters power quality problems and mitigation. Active power filters for power quality altro transformers.
An active filter circuit the opamp bandpass filter circuit. Current controlled voltage source inverter based three phase shunt active power filter 1nageswararao g. Builtin savings potential the cubicles of sivacon s8 for central reactive power compensation relieve transformers and cables, reduce trans mission losses, and therefore save energy. It has superior qualities over its contemporaries namely svcs and statcoms. The instantaneous imaginary power, which is a theoretical quantity without physical meaning, is an extension of the reactive power definition to instantaneous values. This paper presents the design and simulation of a singlephase shunt active power filter for harmonic and power factor compensation of multiple nonlinear loads.
In this paper, an alternative control method is proposed to improve the harmonic suppression efficiency of the active power filter in a distorted and an. Shunt active power filter, voltage source converters, linear and nonlinear loads, pi controllers. This type of shunt active power filter is called the current injection type apf. Design and simulation of a shunt active filter in application. Matlabsimulink model based shunt active power filter using fuzzy logic controller to minimize the harmonics swati pal, pallavi singh bondriya, yogesh pahariya. Shunt active filters saf operation principle of a shunt active filter. Where kpdc and kidc are the proportional and integrator gains of pi regulator v dc reference dclink voltage vdc measured dc link voltage. Pdf shunt active power filter sapf has now become a wellknown sophisticated technology to overcome current harmonics and reactive.
This paper will discuss and analyze the simulation result for a threephase shunt active power filter using matlabsimulink program. If we additionally assume the lossfree operation of the filter, the real power drawn from the power line will not be changed by the presence of. Shunt active power filters compensate current harmonics by injecting equal but opposite harmonic compensating current. Linear loads sinusoidal current with sinusoidal voltage 2. I discuss terms like active filters, passive filters, lowpass, highpass, bandpass and bandreject filters. Shunt active filter series active filter and hybrid active filter. Shunt active filter the concept of active filter uses power electronic equipment to produce harmonic. Soumya ranjan mohapatra submitted to the national institute of technology rourkela for the award of master of technology by research in electrical. Figure 1 shows the model of the singlephase active power filter, where i tl is the nonlinear load current, i tf is the active filter, i ts is the network current, l is the size of coupling filter between the filter and the network, and c. Shunt active power filter for power quality improvement in distribution systems issn. Within these topologies, shunt hybrid filters formed with the use of a three phase voltage source pwm inverter and a series connected lc passive filter are superior.
However, the required dc link voltage is much less when compared with a standard voltage source type. This paper proposes a series active filter and shunt active filter to minimize the power quality impact present in matrix converters instead of passive filter. Proper selection of passive and active power quality filters. With development of key technology of apf, it will have. The proposed system compensates the sag and swell problems efficiently in matrix converter. In the present work a new control algorithm based on instantaneous power theory pq theory for three phase four wire is taken for a shunt active power filter sapf to compensate harmonics and reactive power and power factor of a three phase. The active power filters have gained much more attention because of its excellent performance to mitigate the harmonic and reactive power issues. Pdf simulation a shunt active power filter using matlab. Phase shift of the harmonic current is 180 degrees. Developing a voltagesource shunt active power filter for improving power quality. Reactivepower compensation and active filter lower power costs with the intelligent sivacon technology s answers for infrastructure. Application of shunt active power filter for harmonic reduction and reactive power compensation in threephase fourwire systems article pdf available in iet power electronics 711.
Design of shunt active power filter to eliminate the harmonic. Matlabsimulink model based shunt active power filter. In this case, the shunt active power filter operates as a current source injecting the harmonic components generated by the. Active power filter is a new electric power harmonic management dedicated device, which adopts modern power electronics technology and the digital signal processing technique in the digital signal processor dsp. Shunt active and series active filtersbased power quality. Active filter cancels the harmonics present in load current, and source current will remain sinusoidal and in phase with neutral voltage.
Elimination of harmonics using active power filter based. This is the basic principle of shunt active power filter to eliminate the current harmonics and to compensate the reactive power. Shunt active power filter is a modern addition to family of compensating devices. This lter generates currents for the compensation of. The work presented in this thesis was carried out during. Design and simulation of three phase shunt active power filter using srf 653 figure 2.
Design and implementation of a shunt active power filter with. Why lpf after p,and why of order 5 and frequency 50. A simulink model to improve total harmonic distortion thd using shunt active power filter by, ranganath vallakati master of science in electrical engineering university of north dakota 2. May 08, 2018 this is a video demonstration of the simulink model of shunt apf. This is a video demonstration of the simulink model of shunt apf. Simulation of shunt active filter based on instantaneous reactive power theory is carried out using matlabsimulink toolbox.
Builtin savings potential the cubicles of sivacon s8 for central reactivepower compensation relieve transformers and cables, reduce trans mission losses, and therefore save energy. Student of power electronics, tit bhopal electrical engineering, tit bhopal electrical engineering, lnct bhopal abstract the problem of quality electrical energy provided to. Todays automation equipment benefits us with a more convenient life style and cost savings from higher production efficiency, however it can also bring significant power distortion problems that can lead to energy loss, increasing costs and many other power quality issues. Control of shunt active power filter for improvement of power quality. Nonlinear loads like variable speed drives, uninterrupted power supplies and all kind of rectifiers draw a nonsinusoidal current from the network. The active power filters are used to filter out higher as well as lower order harmonics in the power system. Harmonics mitigation using active power filter sourabh gupta1, preeti gupta2 abstract this paper is proposed to reconsider the development of active power filter apf technologies that are routinely utilized to mitigate harmonics in utility power lines. Shunt active power filter the principle of the shunt filter is to produce harmonic currents equal in magnitude but opposite inphase to those harmonics that are present in the grid. Shunt active power filter file exchange matlab central. The obtained simulation results ensure the effectiveness of the proposed shunt active power filter to reduce the current thd entering the. Reactive power compensation and active filter lower power costs with the intelligent sivacon technology s answers for infrastructure.
Introduction in this chapter, we will deal with active filter circuits. International journal of trend in scientific research and development ijtsrd international open access journal issn no. Pdf in this study, reduced current measurement control method is investigated for operation of 3phase 4wire shunt active power filter sapf under. Department of electrical engineering national institute of technology rourkela orissa, india769008 certificate this is to certify that the thesis entitled study. Pdf the shunt active power filter to compensate reactive power. This thesis deals with the design and implementation of a feedback control scheme for a dc hybrid active power filter used to filter harmonics from a switched reluctance motor srm drive load. Designing, modeling, and simulating a singlephase active. Shunt active filter for power quality improvement core. The system is modeled in matlab simulink to consist of an uncontrolled rectifier and an ac controller as the nonlinear loads, with an active filter to compensate for the harmonic current injected by the load. These power electronics devices are designed with the goal of obtaining a power factor close to 1 and achieving current harmonics and reactive power compensation 5, 6, 15. Nowadays, the active power filters, apfs, can be used as a practical solution to solve the problems caused by the lack of electric power quality, epq. Harmonics of power system seriously affected the quality of electric power. To do so, a pi regulator is used whose output is the reference active current.
A shunt active power filter with instantaneous active and reactive power theory pq theory has been proposed for its performance and ability to compensate the harmonics and reactive power. Shunt active power filter for power quality improvement in. Along with passive filter, active power filter apf is implemented to improve the harmonic filtering performance. Design and simulation of three phase shunt active power. Elimination of harmonics using active power filter based on. Shunt active power filter shapes of load, source and desired. In order to compensate harmonic pollution caused by a nonlinear receiver, the parallel active filter consists of a dclink static power converter and an energy. A matrix converter produces significant harmonics and nonstandard frequency components into load. The active power filter detects harmonic information in nonlinear load currents and actively injects counter harmonic currents to the grid so that the currents at point of common coupling pcc approximate sinusoidal waveforms. Introduction the use of shunt active power filters apf to eliminate harmonic currents and to compensate reactive power for linearnonlinear loads has attracted much attention since the. Dynamic modeling and control of shunt active power filter. I will derive in detail the expression for the frequency response of an rc circuit and show how it can be used as a low pass filter. Design of shunt active power filter by using an advanced.
Introduction in a modern power system, due to broader applications of nonlinear loads such as power. Pdf operation of shunt active power filter under unbalanced and. Feb, 2014 in this method, only active average real power from the load is used and remaining power i. Performance enhancement of active power filter using. Shunt active power filters have been introduced as a way to overcome the power quality problems caused by nonlinear and reactive loads 9, 14, 23. Dynamic modeling and control of shunt active power filter utkal ranjan muduli electrical engineering indian institute of technology gandhinagar gujarat, india382424 email. Shunt active power filter for harmonic compensation of. Pdf application of shunt active power filter for harmonic. Performance enhancement of active power filter using robust. Figure 1 shows the model of the singlephase active power filter, where i tl is the nonlinear load current, i tf is the active filter, i ts is the network current, l is the size of coupling filter between the filter and the network, and c is dc capacitance link. Dynamic modeling and control of shunt active power filter utkal ranjan muduli. Actual current feedback power circuit reference current generator pwm switching strategy overall system controller. Active power filter for threephase current harmonic cancellation and reactive power compensation siyu leng, wenxin liu, iiyop chung and david cartes m 2009 american control conference hyatt regency riverfront, st. In regards to this model could you please explain sir, 1.
The report deals with the basic working and classifications of active power filters, its reference signal generation techniques and some of the controlling schemes of apf. Active power filter apf which overcomes the shortcomings of passive filter pf has become main technology to suppress harmonic. Shunt active power filter compensates current harmonics injecting equal and opposite harmonic compensating current. The control scheme of the apf is based on feedback and feedforward techniques.
Harmonics, thd, active filters, shunt active filter. Pdf realtime control of shunt active power filter under distorted. Ragavan k electrical engineering indian institute of technology gandhinagar gujarat, india382424 email. Therefore they can be considered to be harmonic current sources. In addition, the reactive power compensation is achieved if the active filter is also capable of holding constant and nil the instantaneous imaginary power. Elimination of harmonics using active power filter based on dq reference frame theory m. Shunt active filter works as a current source which, when properly designed and. The emerging technology of powerelectronic devices and the new developments in digital signal processing, dsp, have made possible its practical use. Application of shunt active power filter for harmonic reduction and reactive power compensation in threephase fourwire systems article pdf available.
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