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