The output voltage of wind generator is shown in figure 4. Power quality improvement by upqc device in doubly fed. Power quality improvement in grid connected wind energy. By using a unified power quality conditioner upqc, it is possible to protect a regulated voltage for the loads, balanced and with low harmonic distortion. The upqc employs two voltage source inverters vsis that is connected to a dc. Power quality improvement using a dvr dynamic voltage restorer risha dastagir1, mariam asif2 1,2asst. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. Upqc is used to mitigate the power quality problems like harmonics and sag. To reduce the power quality problems the flexible dual control technique of upqc is more reliable for.
The voltage regulation at wf terminal is conducted using the upqc series converter, by voltage injection. A custom power device for power quality improvement. M, sonepat, hariyana abstract the power quality issue will take new dimension due to power system restructuring and shifting trend towards distributed generation. Pdf abstractpower quality has become an important factor in power. Index terms power quality, shunt active power filter, instantaneous reactive power theory, hysteresis current control. Improvement of power quality has to be treated as a matter of at most importance in the open market economy due to the increased use of non linear loads. The neutral current that may flow toward transformer neutral point is compensated by using a fourleg voltage. Shunt active power filter for power quality improvement in.
In the era of big data, most scientific documents and books are stored in databases electronically. The unified power quality conditioner upqc is one of the advanced custom power device in the area of power quality improvement. The term active power filter apf is a widely used terminology in the area of electric power quality improvement. The upqc provides instantaneous sampling of source voltage and load current by using series inverter and shunt inverter respectively. In other words, the upqc has the capability of improving power quality at the point of installation on power distribution systems or industrial power systems. Haritha2 1pg student, department of eee, jntua, ananthapuramu, andhra pradesh, india.
The objective of series compensator is to generate in phase voltage component to mitigate sag and generate out of phase component to mitigate swell. The neutral of series transformer used in the fourth wire for the 3p4w system. Upqc which is a combination of back to back connected series and shunt apfs through a common dc link voltage, the two apfs function differently. S kamakshaiah1 ashwini kumar 2 1,2,dept of eee, sreedattha institute of engineering and science abstract. Power quality improvement using upqc for system with non.
However, the tuning of the pi controller is a tedious job. Study on threephase fourwire upqc device for power quality improvement 1sumaya banu, 2dr. Power quality improvement in grid connected wind energy system using facts device. In modern power system consists of wide range of electrical, electronic and power electronic. Pdf power quality improvement in distributed generation. Unified power quality conditioner upqc actually the upqc is the one of most flexible devices on the new concept of equalization that can provide harmonic compensation 15.
To prove the flexibility and effectiveness of the proposed scheme two types of loads have been considered and simulation results are observed. Publishers pdf, also known as version of record includes final page. Here unified power quality conditioner upqc has been used to overcome the power quality problem. Pdf recently a large interest has been focused on power quality domain due to. These devices inject the voltage and current respectively but the seriesshunt devices have an. Filter block control plays a big role in maintaining power quality. Power quality improvement using a dvr dynamic voltage. Department of health and human services 540 gaither road rockville, md 20850. This paper presents a power quality improvement by using multi converter unified powerquality conditioning system mcupqc, it will provide the following multi functions. The pi control based techniques are simple and reasonably effective. M files that extends the matlab environment to solve particular classes of problem.
Power quality improvement using upqc for system with non linear loads 14. Lda simulates the process of generating a document based on a. Power quality improvement in fourteen bus system using upqc 425 represented as series resistance and reactance between bus and neutral. Power quality improvement of a three phase four wire system using upqc d. Improvement of power quality using an integrated control. Saaqib 1,2,3 department of power system engineering,uttarakhand technical university, dehradun, uttarakhand, pin248007, india abstract. It comprises of a parallel and a seriesactive filter together with a typical dc link 14. In this paper, a 9level based upqc system is developed to maintain the system voltage and current profile at the grid as well as the load. Volume7 issue5s2 international journal of recent technology. Review of dual upqc control techniques for power quality. Power quality seminar report, ppt, pdf for electrical. Introduction in earlier days, a number of aplc s of the pwm type configurations are proposed. This paper mainly deals with the regulation of voltage at wind farm wf terminals and the improvement of power quality and wf stability in a wf to weakgrid connection.
The facts devices and tradition power electronics devices are introduced to power system for the improvement of power quality of the electrical power system. Upqc is a recent power electronic module which guarantees better power quality mitigation as it has both seriesactive and shuntactive power filters apfs. Unified power quality conditioner upqc inverteri compensates for sag through a tuned filter and voltage transformer inverterii slcvc synchronous link converter var compensator provides var to the load, isolates load current harmonics, makes input power factor unity slcvc maintains the charge of the dc link capacitor. Explore power quality with free download of seminar report and ppt in pdf and doc format. Power system using shunt active filter with synchronous detection method a thesis that has been submitted in partial fulfillment of the.
But these have got some problems a qrc has been proposed to overcome these problems resonant converter is necessary in order to reduce the thd and to the input power factor most of the schemes are series, parallel. Upqc consists of series inverter, shunt \ud inverter and capacitance. Power quality improvement in fourteen bus system using upqc. Indeed, the harmonic distortion and imbalance influence not only the phase components of system and electrical power. The unified power quality conditioner upqc is a custom power device, which mitigates voltage and currentrelated pq issues in the power distribution systems. Power quality enhancement of miso converter for combined. Fuzzy logic controller implementation of power quality. A upqc, combines the operations of a distribution static compensator dstatcom. The voltage profile is improved by the addition of upqc at time equal to 0. The statcom control scheme for the grid connected wind energy generation system for power quality improvement is simulated using matlabsimulink in power system block set. Measure of proper utilization of power by customers electrical pollutant vs clean utility. Abstractpower quality is one of major problems in the todays scenario. With shifting this trend towards distributed and isolated generation, the issue of power quality will take new magnitude.
Upqc improves power quality by compensating both harmonics and load current which thereby makes source current and load voltage sinusoidal at the required voltage level. On the submission of my thesis entitled power quality improvement using. A power quality problem is an incidental claim as an irregular voltage, current or frequency that results in a failure of end use equipments. Power quality improvements in low voltage distribution networks containing distributed energy resources sumit mazumder ami bsc. Power quality improvement using unified power quality. This paper deals with the performance of unified power quality conditioner upqc based on current source converter csc topology. This paper presents the power quality improvement using upqc. Department of electrical engineering national institute of technology, rourkela certificate this is to certify that the project entitled power quality improvement using unified power quality conditioner. Power quality improvement in distribution system by using. Introduction now a days due to increased power quality problems by using of switch offon introduction loads, nonlinear load and induction motor etc in domestic and industries, powerquality pq problems, such as harmonics, flicker, and. This paper aims at the development of multilevel inverter mli based unified power quality conditioner upqc for power quality improvement in bus system. Power quality improvement in distributed generation. This paper presents a novel control strategy of a threephase fourwire unified power quality upqc for an improvement in power quality. Power quality improvement in distributed generation resources using upqc article pdf available in international journal of renewable energy research vol.
Power quality improvement of a three phase four wire. Power quality improvement authorstream presentation. The designed upqc consist of a series active power filter and a shunt active power filter which shares a common dc link capacitor. Mapping the academic landscape of the renewable energy. Upqc is especially \ud obtained to resolve different kind of power quality drawback like reactive power compensation, voltage \ud interruption and harmonics. Power quality improvement using upqc for wind farm. Mahela and shaik, presented the detailed analysis of various power quality improvement techniques. A static compensator statcom is a flexible ac transmission system facts controller, which.
Study on threephase fourwire upqc device for power. Upqc is especially obtained to resolve different kind of power quality drawback like reactive power compensation, voltage interruption and harmonics. Primary care practice facilitation curriculum module 8. The active power control approach is used to compensate. Anfis based mppt scheme works fast and gives improved results under. The modelling of series apf, shunt apf and the upqc has been carried out using matlabsimulink. The upqc is realized by integration of series and shunt. Matlab simulation of upqc for power quality mitigation. This paper proposes a fuzzy logic based new control scheme for the unified power quality conditioner upqc for minimizing the voltage sag and total harmonic distortion in the distribution system consequently to improve the power quality. This project is done to reduce power quality problems such as harmonics in transmission lines with the design of unified power quality conditioner. Applications of upqc for power quality improvement. Power quality improvement by upqc device in doubly fed induction generator wind farm to weakgrid connection miss sobha rani injeti, k.
Every inverter connected with pulse generator for switching on. Abstract in recent years, power engineers are increasingly concerned over the quality of the electrical power. In this paper unified power quality conditioner upqc. Download pdf ijrsr international journal of recent scientific. The power fed is linked through common dc link and maintains constant real power. Performance analysis of power quality improvement using shunt active. Quality conditioner upqc to improve the power quality problems by using pq theory.
Power quality enhancement by unified power quality. Pdf power quality improvement using interline unified power. One acting as a shunt apf, while the other as series apf. Therefore, the upqc is expected to be one of the most powerful solutions to large capacity loads sensitive to supply voltage flicker imbalance.
The upqc, realized by using two vsi is shown in fig. Power quality improvement using matrix converter based upqc. Introduction the unified power quality conditioner is a custom power device that incorporates the series and shunt active filters, connected backtoback on the dc side and allotment a common dc capacitor, it utilizes two voltage source inverters vsis that are connected to a. Department of electrical and electronics, trinity institute of technology and research bhopal. Power quality improvement in distribution network using. Power quality enhancement by unified power quality conditioner upqc using pq theory 1 dipanshu saini, 2 amit negi, 3 mohd.
Improvement of power quality using an integrated control technique of unified power quality conditioner upqc mr. Latent dirichlet allocation lda was proposed by blei et al. Power quality improvement by unified power quality. Advent of wide spread use of high power high frequency switching devices additional system required to maintain quality deregulation, tariff. Design of upqc to improve power quality problems youtube. The shunt and series active filter performs the simultaneous elimination of current and voltage problems. Mitigation of power quality problems using facts devices. For more information on the design and simulation of series active filter and simulation of upqc please fo through the attached presentation. Control schemes of upqc based on pi controller has been widely reported 10. Apfs have made it possible to mitigate some of the major power quality problems effectively. Engineering in electrical and electronics engineering submitted in partial fulfilment of the requirements for the degree of.
The upqc has the capability of improving power quality at the point of fitting on power distribution system. Simulation of unified power quality conditioner should be done in matlab. Custom power devices have utilized as a part of the distribution system and for the improvement of current issues, parallel active filters, for example, dstatcom. Integration of sustainable energy sources through power electronic. Design of unified power quality conditioner upqc to. The design of upqc connected to three phase four wire system 3p4w. The control of the upqc, will be implemented in a rotating frame dq0 using parks transformation eq. This paper illustrates how upqc can improve the power quality by mitigating all these. Power quality improvement in pv grid connected system by using. A group of controllers known as custom power devices such as unified power quality conditioner upqc, dynamic voltage restorer dvr, and distribution static compensator dstatcom are used for improving the quality of electrical power. Power quality improvement in distribution system by using an inverter based upqc with reduced dc link voltage rating s. This proposed new concept of optimal utilization of a unified power quality conditioner upqc with a power angle control approach is illustrated.
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