The shunt active power filter has proved to be a useful device to eliminate harmonic currents and to compensate reactive pow er for linearnonlinear loads. Matlabsimulink model based shunt active power filter using. A 3, 415v, 50hz supply with non linear load as diode rectifier having rl load and shunt active filter are developed in matlabsimulink using sim power system toolbox. A few aspects of power quality improvement using shunt active power filter c.
Shunt active power filter sapf is a power electronics converter that can inject current having same magnitude and opposite phase with that of original harmonics current. Shunt active power filter for power quality improvement in distribution systems issn. The power circuit is accountable for synthesizing the required compensation current. Shunt active power filter compensates current harmonics injecting equal and opposite harmonic compensating current. Harmonics, thd, active filters, shunt active filter. Active filter cancels the harmonics present in load current, and source current will remain sinusoidal and in phase with neutral voltage. Control strategy to get the accuracy of the apf and to simplify the control scheme, an advanced control strategy is designed as shown in. National institute of technology rourkela certificate this is to certify that the thesis entitled, investigations on shunt active power filter for power quality improvement submitted by sri d. Shunt active filters allow the compensation of current harmonics and unbalance, together with power factor correction, and can be much better solution than the convectional approach6. Shunt active power filter shapes of load, source and desired. Shunt active power filter thesis pdf to the best of my knowledge, the matter embodied in the thesis has not been submitted to any. Developing a voltagesource shunt active power filter for improving power quality. An improved svpwm based shunt active power filter for.
Harmonic reduction in wind power generating system using. 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. 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. Most of the power quality problems are introduce by the power electronics. Shunt active filter works as a current source which, when properly designed and. In next step the simulation model is connected with shunt active power filter as shown in fig. Active power filters are increasingly used to compensate for harmonics and reactive power generated by nonlinear loads which are installed by various utility. Pdf the present paper describes a shunt active power filter with a control system based on the pq theory, and studies its performance through. Due to nonlinear loads harmonics mainly occurs in current signal, so in this paper a shunt active power filter is used. Design of shunt active filter to improve power quality.
Performance of fuzzy based shunt active power filter using. Analysis of power quality improvement using active shunt. Shunt active power filtershapes of load, source and desired. Pdf the shunt active power filter to compensate reactive power. Pdf simulation results of a shunt active power filter with control. 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 0. Design of shunt active power filter for improvement of power. Design of shunt active filter to improve power quality using. Shunt active power filter sapf is a power electronics converter that can inject current having same.
Nonlinear loads like variable speed drives, uninterrupted power supplies and all kind of rectifiers draw a nonsinusoidal current from the network. Summary shunt active power filters apfs are used to compensate the power quality problems of harmonic currents of various harmonics. Pdf control algorithms of shunt active power filter for. Pdf the shunt active power filter to compensate reactive. Pdf shunt active power filter sapf has now become a wellknown sophisticated technology to overcome current harmonics and reactive. Matlabsimulink model based shunt active power filter using fuzzy logic controller to minimize the harmonics swati pal, pallavi singh bondriya, yogesh pahariya. The configuration of a system with shunt active filter. This vsi can acts as controlled current source and can provide required compensation. Pdf the shunt active power filter to compensate reactive power and optimized thd with improved power by pi controller in a 3 phase 3 wire distribution network international journal of trend in scientific research and development ijtsrd academia. Power system using shunt active filter with synchronous detection method a thesis that has been submitted in partial fulfillment of the necessities for the degree of. Reduction of harmonics using shunt active power filters. A shunt active filter consists of three phase, three leg one for each phase, voltage source inverter. Design of shunt active power filter for improvement of.
It has superior qualities over its contemporaries namely svcs and statcoms. Simulation of shunt active filter based on instantaneous reactive power theory is carried out using matlabsimulink toolbox. Mathematical model and control strategy on dq frame for. This project deals with study and analysis of performance of induction motor and study. Modelling and simulation of three phase shunt active power. Power system using shunt active filter with synchronous detection method a thesis that has been submitted in partial fulfillment of the. Shunt active power filters power quality problems and mitigation. Harmonic elimination using three phase shunt active power. This is the basic principle of shunt active power filter to eliminate the current harmonics and to compensate the reactive power. Active power filter an overview sciencedirect topics. Shunt active power filter for power quality improvement in. A few aspects of power quality improvement using shunt active. The principles of operation of shunt, series, also a brief description of the state of the art in the active power filter market.
Shunt active filter has the capability for compensating load harmonic currents and reactive power requirement of. Design of shunt active power filter to eliminate the harmonic. 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. Active power filter, hybrid filter, passive filter, current harmonic abstract this paper presents a shunt hybrid active power filter application mainly for current harmonic elimination and fixed reactive power compensation. International journal of trend in scientific research and development ijtsrd international open access journal issn no. Active power filters have been widely used for harmonic elimination. Design of shunt active power filter to eliminate the.
Performance improvement of shunt active power filter by a new. May 08, 2018 this is a video demonstration of the simulink model of shunt apf. Therefore they can be considered to be harmonic current sources. The shunt active power filter injects ac power current ic to cancel the main ac harmonic content. Thus a shunt active power filter uses the concept of.
There are three main parts to be considered for using the shunt active power filter as shown in fig. Nonlinear loads like variable speed drives, uninterrupted power supplies and all kind of. Finally, this method is validated through a field test of a charging station. To eliminate current harmonic components generated by nonlinear loads, the active power filter produces equal but opposite harmonic currents to the point of connection with the nonlinear load. 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. Capacity calculation of shunt active power filters for. Sapf shunt active power filter is designed which compensates harmonics and load reactive power, by taking the reference of load current making the supply current balanced and distortion free when supply is balanced. Basic principle of shunt active filter basic principle of shunt active filter is it compensates current harmonics by injecting equal but opposite harmonic compensating current. Control strategies of shunt active power filter sciencedirect. 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. Shunt active filter for harmonic compensation is controlled with instantaneous active and reactive power theory.
Performance analysis of shunt active power filter with. Operation principle of system based on shunt active filter. This is a video demonstration of the simulink model of shunt apf. Active power filters apfs are now seen as a viable alternative over the classical methods to compensate harmonics as well as reactive power requirements of the nonlinear loads. Then, the harmonic current amplification caused by the shunt active power filter is researched, and the analytical formula for the overload factor is derived to further correct the capacity of the shunt active power filter. Shunt active filter is a custom power device employed for compensation of harmonics to maintain source parameters unaffected due to nonlinear load. Instantaneous pq theory is used for control technique. The performance of a conventional threephase shunt active power filter apf using synchronous detection method sdm has been. The proposed system consists of a small rated voltage source active power filter and a series of lc passive. Design and simulation of three phase shunt active power filter using srf 653 figure 2.
An improved svpwm based shunt active power filter for compensation of power system harmonics o v s r varaprasad, student member, ieee, d v s s siva. Three phase induction motors are the most common and frequently encountered machines in industry. Shunt active filter has the capability for compensating load harmonic currents and reactive power requirement of the nonlinear loads in power network. Shunt active power filter sapf is the best solution to minimize harmonic. This paper describes the development of a low cost shunt active power filter with digital control, which allows dynamic power factor correction and both. Design of shunt active power filter to eliminate the harmonic cur. One such equipment installed is the shunt active power filter which operates to lower the harmonic current flowing in the ac system. Various topologies of active power filters have been developed so far. Shunt active power filter is a modern addition to family of compensating devices. Performance improvement of shunt active power filter by a. This type of machines has simple in design and easy to maintain. Phase shift of the harmonic current is 180 degrees.
In this method, the source currents ia,ib, ic are first detected and transformed into twophase stationary frame 0 from the threephase stationary frame abc, as per. In this method, the source currents ia,ib, ic are first detected and transformed into. The advantages of the resistive load synthesis over the. Electricity consumption has been increasing so rapidly once in line with the development of the country to achieve its status as the industrial. Shunt active filter for power quality improvement core. Mitigation of harmonics by shunt active power filter. Improvement of the shunt active power filter dynamic performance. Shunt active filter the proposed threephase active power filter consists of a power converter, a dclink capacitor and a filter inductor.
It consists of three phase supply, three phase nonlinear load, rl filter, and shunt connected vsi active filter. In this paper, only the odd harmonics have been studied, and the thd of the compensated current and transient response have been limited to 1. Shunt active filters saf operation principle of a shunt active filter. The shunt active power filter sapf is the tool to solve the harmonic problem because this filter provides higher efficiency and more flexible compared with a passive power filter 5. Shunt active power filter based on srf theory and hysteresis. In this case the shunt active power filter operates as a current source injecting the harmonic. Analysis of power quality improvement using active shunt filters. In patidarl and sing 2008, a fastacting lz controller for the shunt active power filter sapf is proposed.
A few aspects of power quality improvement using shunt. The simple shunt active filter arrangement with nonlinear load is considered. Improvement of the shunt active power filter dynamic. This is to certify that the thesis entitled improvement of power quality in 3 phase system using shunt active filter, submitted by subhransu satpathy roll. Three phase active power filter concept uses harmonic current compensation with 180 degree phase shift to harmonic currents generated from nonlinear loads. It consists of a pwmbased voltage source inverter vsi and a. Main advantage of active filter over passive filter is that it can be controlled to compensate for harmonics in such a way that total harmonic distortion thd lower. Matlabsimulink model based shunt active power filter. Feb, 2014 in this method, only active average real power from the load is used and remaining power i. Modeling and simulation of a pi controlled shunt active. Shunt active power filters compensate current harmonics by injecting equal but opposite harmonic compensating current.
In this paper design of shunt active filter its control technique and performance for rl load is presented. Analysis of power quality improvement using active shunt filters soniya arora1, neelam rawat2, vrij mohan vidyarthi3 1,2,3 assistant professor, jbit, dehradun, uttarakhand, abstract. Shunt active power filters sapfs are mainly used at customer end for the compensation of harmonics, reactive power, and input current balancing. The work presented in this thesis was carried out during. The active filters are overcome the problem occurring in the passive filter.
Design of shunt active power filter by using an advanced. Shunt active power filter synthesizing resistive loads. The paper discusses the use of a shunt active power filter to compensate for the line current distortion and to improve the power factor. Combination of passive, series and shunt active filters 4. Prema latha abstract power quality standards ieee519 compel to limit the total harmonic distortion within the acceptable range. Current harmonics is one of the most significant power quality issues which has attracted tremendous research interest. Design and simulation of three phase shunt active power. The objective of the active filtering is to solve these problems by combining with a muchreduced rating of the necessary passive components.
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