Simulation of unified power quality conditioner should be done in matlab. In this paper, the operation and control of photovoltaicfed unified power quality conditioner in gridconnected mode including the power quality enhancement feature has been systematically examined. The design of upqc connected to three phase four wire system 3p4w. The polluted loads at the end user side are always creates the power quality problems at the point of common coupling pcc. In upqc, shunt apf is overburdened when it alone supplies total load reactive power. The design configuration is based on the connection of series and shunt inverters. The deterioration of the secured level of power quality has gained significant attention in the past few years. Unified power quality conditioner upqc for nonlinear and a voltage sensitive load has following facilities.
Custom power devices cpd such as dynamic voltage restorer dvr and unified power quality conditioner upqc provide a level of reliability and power quality that is urgently. The upqc, like a upfc, employs two voltage source inverters vsis that are connected to a common dc energy storage capacitor. Unified power quality conditioner for improving power quality. Mitigation of power quality problems with reduced switches using unified power quality conditioner.
Design of unified power quality conditioner upqc to improve. Power quality full notes pdf download faadooengineers. In this, the design configuration is right series and left shunt with the current source converter csc 3, 4. The upqc is similar in construction to a unified power flow controller upfc 9. Power quality pq mainly deals with issues like maintain a fixed voltage at.
The current harmonics, voltage sags, voltage swells, voltage unbalance, dclink voltage regulation are the primary factors limiting the. The loadreactive power compensation in most of the upqc based power quality compensation application is done by shunt apf, whereas, the series apf. Abstract due to vast implementation of power electronics based equipment power quality has turned into essential and important factor. Fuzzy logic controlled unified power quality conditioner for. Velumani 1 pg scholar, 2assistant professor, 3 pg scholar 1 department of electrical and electronics engineering, 1 sona college of technology, salem, tamilnadu, india. Unified power quality conditioner free download as powerpoint presentation. This paper presents a design of a unified power quality conditioner upqc to improve the power quality problems by using pq theory. It consists of shunt and series converters connected back to back to a common dc link. The upfc is employed in power transmission system, where as the upqc is employed in a power distribution system. The research paper published by ijser journal is about control of interline unified power quality conditioner for power quality disturbances using simulink 9. A unified power quality conditioner upqc is a device that is similar in construction to a unified power flow conditioner upfc. Software quality management ebooks, presentations and lecture notes covering full semester syllabus power electronics full notes free pdf book download total quality management full notes, e book, all syllabus. Com, dynamic voltage restorer dvr and unified power quality conditioner upqc. Power quality management using unified power quality.
Optimal location of unified power quality conditioner in. This distorted waveform produces quality issues in the distribution system. This paper deals with the performance of unified power quality conditioner upqc based on current source converter csc topology. Power conditioners represent a category of products that some consumers dont believe could benefit audio or video components. Sangameswararaju2 1,2eee,sv university tirupati, india in this paper, an artificial bees colony abc algorithm abstract. 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.
These quantities are illustrated for an electrical system represented in abc coordinates. Here we have done simulation of shunt active power. Jun 11, 2014 the unified power quality conditioner is commonly called upqc. The ferroresonant power conditioners protect equipment from all power problems, other than the complete loss of power. Active power filter apf, harmonic compensation, power quality, unified power quality conditioner upqc, custom power devices. Protection against this situation is necessary because it adversely affects reliability and quality of power supply. A new unified power quality conditioner for grid integration of pv system and power quality improvement feature distribution system prakash vodapalli department of eee, tallapadmavathi college of engineering, warangal dt. Unified power quality conditioner upqc in alleviation of. Power quality improvement by unified power quality conditioner based on csc topology using synchronous reference frame theory. Unified power quality conditioner is an advanced concept in the area of power quality control. This protects the consumer from an adequate voltage quality i. The unified power quality conditioner plays an important role in the constrained delivery of electrical power from a source to an isolated pool of load or from a source to the grid. The power components power and quality are related to the same alpha and beta voltages and currents, and can be written together. Power quality enhancement by unified power quality.
The loadreactive power compensation in most of the upqc based power quality compensation. The basic working principle of unified power quality conditioner is based on series active filter and parallel active filter power converters that share a common dc link l. Power quality conditioners a power conditioner also known as a line conditioner or power line conditioner is a device intended to improve the quality of power that is delivered to electrical load equipment. Pdf moth flame optimization method for unified power. It eliminates the harmonics in the supply current, thus. It aims at the integration of seriesactive and shuntactive power filters. Constant frequencyunified power quality conditioner. Power quality improvement by using active power conditioner. Electrical project on unified power quality conditioner upqc. Power quality improvement by unified power quality. Power quality the quality of electrical power supply is a set of parameters which describe the process of electric power delivery to the user under normal operating conditions, determine the continuity of supply short and long supply interruptions and characterize the supply.
Due to continuous use of the nonlinear loads the voltage and current waveform shows the distortions. Pac method aims at effective utilization of series and shunt apfs by sharing reactive power burden between the two. An unbalanced and nonlinear load l1 is supplied by feeder1 while a sensitive load l2 is supplied through feeder 2. Sola power conditioners natural power solutions power. Exact locations of faults are decided using random.
Unified power quality conditioner pdf download a5ngo. Performance enhancement of pvfed unified power quality. The unified power quality conditioner upqc plays an important role in the constrained delivery of electrical power from source to an isolated pool of load or from a. Saaqib 1,2,3 department of power system engineering,uttarakhand technical university, dehradun, uttarakhand, pin248007, india abstract in these days the power quality related problem become more severe due to the. For the system considered in the present paper, the determination of n f is shown in table 1. The neutral of series transformer used in the fourth wire for the 3p4w system. Apc surge protector for the dsl line and all incoming ac current from this point on, the incoming ac power is split like this. Department of eee, don bosco institute of technology. Abc and nfc based unified power quality conditioner for compensating power quality problem. Introduction the important factors to be considered in power quality measurement are the active power, reactive power, variation of voltage and current, flicker, harmonics, and electrical behaviour of.
A power conditioner also known as a line conditioner or power line conditioner is a device intended to improve the quality of the power that is delivered to electrical load equipment. Abc and nfc based unified power quality conditioner for compensating power quality problem mr. In this paper a upqc controlled by srf theory is used to compensate current harmonics and voltage distortion in line due to nonlinear loads and fault conditions. Power quality conditioner upqc, i would like to extend my gratitude and sincere thanks to my supervisor prof.
The main purpose of a upqc is to compensate for voltage imbalance, reactive power. Research article, report by the scientific world journal. Improvement of power quality using an integrated control. Power quality is one of the major problems in the todays scenario. Conditioner introduction unified power quality conditioners upqcs allow the mitigation of voltage and current disturbances that could affect sensitive electrical loads while compensating the load reactive power. Power quality enhancement by unified power quality conditioner upqc using pq theory 1 dipanshu saini, 2 amit negi, 3 mohd. Pdf ee6005 power quality pq books, lecture notes, 2marks.
Unified power quality conditioner for improving power. Design of interline unified power quality conditioner for. Power quality the quality of electrical power supply is a set of parameters which describe the process of electric power delivery to the user under normal operating conditions, determine the continuity of supply short and long supply interruption. An improved control method for unified power quality. Performance analysis of unified power quality conditioner.
The term most often refers to a device that acts in one or more ways to deliver a voltage of the proper level and characteristics to enable load equipment to. Interline unified power quality conditioner iupqc, specifically aims at the integration of series vsc and shunt vsc to provide high quality power supply by means of voltage sagswell compensation, harmonic elimination and power factor correction in a power distribution network, so that improved power quality can be made available at the. Performance analysis of unified power quality conditioner for. Upqc is used to mitigate the power quality problems like harmonics and sag. With the increase in use of advanced power electronics and computer controlled devices in distribution system, problems due to power quality events such as the voltage sag and swell, harmonics generation are increasing. Every ferroresonant power conditioner is manufactured to exacting specifications and is subject to rigorous quality control. Mitigation of power quality problems with reduced switches. Department of electrical engineering national institute of technology, rourkela certificate this is to certify that the project entitled power quality improvement using unified power. May 09, 2015 power quality conditioners a power conditioner also known as a line conditioner or power line conditioner is a device intended to improve the quality of power that is delivered to electrical load equipment.
This paper proposes an improved control method for unified power quality conditioner upqc with unbalanced load. A survey on unified power quality conditioner for power. To reduce the power quality problems the flexible dual control technique of upqc is more reliable for power distribution system. A new control strategy is proposed to the control algorithm for series apf is based on unit vector template generation to compensate the current unbalance present in. Mitigation of power quality problems with reduced switches using unified power quality conditioner g. Download link is provided and students can download the anna university ee6005 power quality pq syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. The shunt and series active filter performs the simultaneous elimination of current and voltage problems. When the power system is nonlinear then d and q axis currents ii. The paper illustrates the operation and control of an interline unified power quality conditioner iupqc.
Unified power quality conditioner for improving power quality using ten switch inverter 1 s. Control of interline unified power quality conditioner for. Abstract power quality is the hot issue in the power world. Upqc is one of the best custom power device used to compensate both source and load side problems. The device is connected between two feeders coming from different substa tions. Recent research efforts have been made towards utilizing unified power quality conditioner upqc to solve almost all power quality. The unified power quality conditioner upqc is a facts device that is used in the distribution system to. Guna sekar me power electronics and drives, department of eee, kongu engineering collegeperundurai assistant professor, department of eee, kongu engineering collegeperundurai abstract. The term most often refers to a device that acts in one or more ways to deliver a voltage of the proper level and characteristics to enable load equipment to function properly. Design of unified power quality conditioner upqc to. The unified power quality conditioner upqc aims at integrating both shunt and series apfs through a common dc link capacitor. The proposed control algorithm for series and shunt converters based on flc and synchronous reference frame. Unified power quality conditioner upqc in alleviation of power quality issues.
We can use dc capacitor bank, fuel cell, pvarray, flywheel, supercapacitor, etc. Some come from your local utility company, but most are created within your own facility as a result of the distribution. 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. The distribution system, have numerous nonlinear loads, which severely affect the quality of power supplies. This article is presented new control approaches for both series and shunt inverter. Unified power quality conditioner upqc is one of the custom power devices, which can solve voltage and current related problem simultaneously. This is connected before load to make load voltage distortion free and at the same time reac.
They excel at tightly regulating the voltage, providing superior noise attenuation and are. Biological sciences environmental issues electric converters properties electric current converters equipment performance evaluation. Fuzzy logic controlled unified power quality conditioner. Abc and nfc based unified power quality conditioner for.
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