It is very important to maintained the voltage and eliminate the power quality problems because new generation load that uses. Doctoral thesis, nanyang technological university, singapore. Study on threephase fourwire upqc device for power quality improvement 1sumaya banu, 2dr. Pdf power quality improvement in distributed generation. This thesis addresses some of the power quality issues and investigates possible solutions to those problems in order to increase the ability to use of renewable energy sources. Power quality improvement in fourteen bus system using upqc 429 table 2. By using a unified power quality conditioner upqc, it is possible to protect a regulated voltage for the. Power quality improvement using unified power quality. 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. Pdf power quality improvement using upqc ijera journal. One of the most effective solutions to power quality issues in the distribution side is the installation of unified power quality conditioner upqc. Rajani, phd associate professor mjr college of engineering and technology jntua abstract. This paper introduces a new concept of optimal utilization of a unified power quality conditioner upqc.
Haritha2 1pg student, department of eee, jntua, ananthapuramu, andhra pradesh, india. In this thesis, the applications of artificial neural network ann techniques as controllers for the shunt active filter and unified power quality conditioner upqc are proposed. Unified power quality conditionerupqc unified power quality conditioner upqc is a multitasking power conditioner that can be used to compensate many voltage disturbancesof the power supply, voltage fluctuations, and to prevent harmonic load current from entering the power system. Final year ieee power quality improvement projects, final year ieee projects, online project support for all departments of m. Power quality improvement by joined operation of an upqc. This project is done to reduce power quality problems such as harmonics in transmission lines with the design of unified power quality conditioner. The unified power quality conditioner upqc is one of the advanced custom power device in the area of power quality improvement. The point of this work to present the power quality issues and to discuss the solutions of some of these problems is using power electronic controllers. Power quality events with wind energy operations such as outage of wind generator, grid synchronization of wind generator and wind speed variations have also been investigated.
These devices inject the voltage and current respectively but the seriesshunt devices have an. 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. Pdf power quality improvement using upqc admin asdf. Abstract this paper present an analysis on the unified power quality conditioner upqc to improve the electric power quality at distribution levels. Comprising both shunt and series elements inverters, upqc compensates for sags and swells, unbalance and distortion harmonicsin the supply current and supply voltage respectively. In other words, the upqc has the capability of improving power quality at the point of installation on power distribution systems or. Power quality improvement using upqc for system with non linear loads 14. The neutral of series transformer used in the fourth wire for the 3p4w system.
With the extensive improvement in power electronics field, the implementation of power electronics to improve power quality provides effective solutions to power quality problems. Fuzzy logic controller implementation of power quality. Power quality improvment by upqc using ann controller ijert. Power quality improvement using ann logic based upqc for harmonic distrotion 94 series apf in upqc is to compensate the voltage. A upqc that combines the operations of a distribution static compensator dstatcom and. The custom power devices enhance the quality and reliability of power to the customers. Power quality improvement using a dvr dynamic voltage restorer risha dastagir1, mariam asif2 1,2asst. This paper proposes a new connection for a unified power quality conditioner upqc to improve the power quality of two feeders in a distribution system. 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 low pass filter. The shunt and series active filter performs the simultaneous elimination of current and voltage problems. Power quality improvement by unified power quality. Power quality improvement in distribution system by using an inverter based upqc with reduced dc link voltage rating s.
Power quality improvement using a dvr dynamic voltage. The power quality improvement during disturbances in the grid due to feeder tripping, feeder reclosing, load switching, voltage sags and swells have been investigated. Upqc consists of series inverter, shunt \ud inverter and capacitance. The forth wire of 3p4w system is developed by means of neutral of series transformer. This proposed new concept of optimal utilization of a unified power quality conditioner upqc with a power angle control approach is illustrated. Analysis and mitigation of power quality issues in. Upqc universal power quality conditioner allows optimal control of a power electronicsbased conditioner. Active power filters are classified into two types that is shunt active power filter apf and series active power filter apf and combination of both is known as upqc unified power quality conditioner. Power quality improvement of a three phase four wire. Power system using shunt active filter with synchronous detection method a thesis that has been submitted in partial fulfillment of the. Power quality problems in distribution systems are not new but customer awareness of these problems increased recently. An overarching evaluation of unified power quality.
This depends upon the loads and their sensitivity to supply voltage fluctuations. Pdf power quality improvement by upqc using ai technique. Power quality improvement in distributed generation resources using upqc article pdf available in international journal of renewable energy research vol. Study on threephase fourwire upqc device for power. Upqc is especially \ud obtained to resolve different kind of power quality drawback like reactive power compensation, voltage \ud interruption and harmonics. This paper presents a power quality improvement by using multi converter unified powerquality conditioning system mcupqc, it will provide the following multi functions. Review of dual upqc control techniques for power quality. Simulation and control of transformer less unified power. A upqc consists of a series voltagesource converter vsc and a shunt vsc both joined together by a common dc bus. The control circuitry of the series apf calculates the reference voltage to be injected by the series apf by comparing the terminal voltage with a reference value of voltage. Assistant professor, jeppiaar institute of technology. Hossain et al analysis and mitigation of power quality issues in dg systems using cpds figure 2.
Abstractpower quality is one of major problems in the todays scenario. Jayasree pg scholar, mjr college of engineering and technology jntua mr. Conventional power quality mitigation equipment is a providing to be. Power quality improvement by iupqc with fuzzy control. Indeed, the harmonic distortion and imbalance influence not only the phase components of system and electrical power. Power quality improvement in distributed generation. Power quality enhancement of miso converter for combined. The main motive of power utilities is to provide uninterrupted sinusoidal voltage of constant amplitude to their customers. Power quality improvement using matrix converter based upqc.
This paper presents a design of a unified power quality conditioner upqc to improve the power quality problems by using pq theory. Chellali benachaiba and brahim ferdi, voltage quality improvement using dvr, electrical power quality and utilisation, journal vol. Department of electrical and electronics, trinity institute of technology and research bhopal. The power fed is linked through common dc link and maintains constant real power. Power quality improvement in fourteen bus system using upqc.
Every inverter connected with pulse generator for switching on. 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. With the custom power devices a customer receives a pre specified quality of power. Upqc is a recent power electronic module which guarantees better power quality mitigation as it has both seriesactive and shuntactive power filters apfs. Design of upqc to improve power quality problems youtube. Introduction according to akagi and fujita the basic device can control the power. The function of unified power quality conditioner is to compensate supply voltage flickerimbalance, reactive power, negativesequence current, and harmonics. This paper presents the power quality improvement using upqc. An overarching evaluation of unified power quality conditioner upqc for refinement in power quality issn. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. A custom power device for power quality improvement.
The paper discusses the topology and control of a unified power quality conditioner upqc that can be used simultaneously in voltage or current control mode in a power distribution system. The upqc has the capability of improving power quality at the point of fitting on power distribution system. The unified power quality conditioner upqc is an efficient traditional power electronics device for the improvement of power quality because of its quick response, high consistency and insignificant value. Abstract in recent years, power engineers are increasingly concerned over the quality of the electrical power. The power consumption in each bus as well as pv location and rating is random. Upqc is used to mitigate the power quality problems like harmonics and sag. The paper examines the power quality problems with upqc with the execution of the left shunt and right shunt connection of the proposed power system fuzzy logic controller approach. This paper deals with the performance of unified power quality conditioner upqc based on current source converter csc topology. Fundamentals of power quality power quality through better wiring and gdiptigrounding practice david brender, p. Matlab simulation of upqc for power quality mitigation. Power quality improvement using upqc for system with non. Pdf power quality and custom power improvement using upqc. The paper describes an advanced approach to power quality enhancement, mainly to flicker mitigation.
This paper describes role of upqc as applied to a 3p4w system to improve pq. A typical distribution network is random in nature. S kamakshaiah1 ashwini kumar 2 1,2,dept of eee, sreedattha institute of engineering and science abstract. 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. Sai chand 4 1 department of electrical and electronics engineering, koneru. The design of upqc connected to three phase four wire system 3p4w. Here we have done simulation of shunt active power. The series inverter of upqc is controlled to perform simultaneous 1 voltage sagswell compensation and 2 load reactive power sharing with the.
Neutral current which flows through neutral terminal of transformer is removed with the. Power quality and custom power improvement using upqc p. The active power control approach is used to compensate. Bhargavi, power quality improvement using interline unified power quality conditioner, 10th international conference on environment and electrical engineering eeeic, pages. Design of unified power quality conditioner upqc to. 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.
Upqc delivers cost savings, increased reliability and enhanced electrical power network functionality. Final year ieee power quality improvement projects. In addition to the powerfactor correction, load balancing and mitigation of voltage and current harmonics, it can regulate the load voltage against voltage sagswell and voltage dip in a threephase threewire distribution system for. 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. Power quality, in terms of power factor and harmonics, is greatly hampered by a three phase. Power quality improvement in distribution network using. In modern power system consists of wide range of electrical, electronic and power electronic. Power quality improvement in distribution system by using. In modern power system consists of wide range of electrical, electronic and power electronic equipment in commercial and industrial applications. Flow diagram for evaluation of power quality problems, solution of a problem comes through a process starting with identification of the problem category 2. Power quality improvement using unified power quality conditioner. Pdf power quality improvement using interline unified. There is described the standard statcom device added by an energy storage in its dc circuit.
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