Active Filters Essay

Submitted By wmelis
Words: 1764
Pages: 8
Open Document
Design and Simulation of Harmonic Filters Using MATLAB® Software
Prof. Dr. Suhail. A. Qureshi, Ahmed Hassan, Azeem Talib U.E.T Lahore Pakistan ABSTRACT
Calculations are a major part of design process in all aspects of engineering applications. This la borious and time comsuming process can be made really easy by the aid of a high level engineering software like MATLAB ®. This paper deals with the scope and flexibility of MATLAB ® for: 1. Calculation of design parameters for L -C components of different branc hes of a harmonic filter. Graphical analysis of Harmonic Pollution and different Harmonic components. Verification of design using SIMULINK ® and Power System Toolbox before implementation to check any design error that might cause undesireable results. superposition. Harmonic order or harmonic number is a reference to the frequency of the harmonic component e.g 3 rd order harmonic component refers to a harmonic component h aving frequncy 3 times that of fundamental i.e. for a 5 0 Hz supply 3rd order component is of 3x50=150Hz. [1] Generally the sum of even harmonics is less than 1% of fundamental component thus t hey are not considered also 3 rd, 5 th and 7 th order harmonics constitute about 97% of harmonic Thus it is most econom ically suitable to design harmonic filters for these components as these can reduce the pollution level well below the desired limit and being economically justified .[2] 2.1

2. 3.

CAUSES OF HARMONICS

1.

INTRODUCTION

Recent advancements in the field of electronic computing has shown its effects in every aspect of life. Use of computers for Desi gn and Analysis has reduced the time, energy and resources requi red to be spent using conventional methods invol ving manual calculations. Comput er aided design and analysis has another edge over orthodox means; we can easily verify the design to catch any errors in the design process. Thus a powerful computer soft ware like MATLAB ® can greatly reduce the time and effort spent on the calculations required for the design process.Using Graphical User Interface (GUI) we can develop a computer program capable of design and graphically analyze the given electrical parameters from the point of application of filter. We can also verify the design by using SIMULINK ® and Power System Toolbox to tell for any short comings in the design.

Industrial electronic devices and non linear loads are the major cause of harmonic generation. As the current drawn from the supply no longer remains sinusoidal thus the resultant waveform is made up of a number of different waveforms of different frequencies .[3] 2.2 EFFECTS OF HARMONICS

Harmonics are a major cause of power supply pollution lowering the power factor and increasing electrical losses. This results in premature equipment failure and higher rating requirement for equipment .[4] 2.3 HARMONIC FI LTERS

A harmonic filter is a device used to ‘filter o ut’ components of different harmon ic order from reaching and harming the load thus the name ‘harmonic filter’. 2.4 APPLICATION OF HARMONIC FILTERS

2.

HARMONICS AND HARMONIC ORDER

Harmonics are the odd integral multiples of fundamental frequency resulting in the distortion of supply waveform due to interferance by

Harmonic Filters are applied at different points where power pollution due to harmonics is observed abo ve the desireable limi ts as recommended by IEE 519 standards.[5] These are used in parallel to load thus providing a bypass low impedance path for the flow of

1

Harmonic currents of sp ecific frequency or harmonic number. Thus a separate harmonic filter branc h is required for each harmoni c order to be removed. Thus a 3 branch filter might be used to filter out 3 rd, 5th and 7 th harmonic component. [5] 3. HARMONIC FILTERS CAPACITOR BANKS AND

3.3 HARMONIC ANALYZER A harmonic analyzer is used to obtain data in terms of electrical parameters for any point we are interested in for the application of harmonic
Show More

Related Documents: Active Filters Essay

Pompeii Research Paper

Not knowing when a volcano will erupt has the potential to lead to a catastrophe. Such as, back in the year of 79 A.D., Mount Vesuvius erupted and buried the ancient Roman city of Pompeii. 2,000 people were dead in the aftermath. Tons of ash buried Pompeii and it was unrecognizable. Pompeii was not rediscovered until 1748. Many explorers was shocked to find it buried under ash, dust, and debris. The eruption of Mount Vesuvius also destroyed communities: Herculaneum, Stabiae, Torre, and Annunziata…

Words 819 - Pages 4

Nt1310 Unit 5 Case Study 1

The active power flow of the iUPQC is shown in Fig. 19. In Fig. 19(a), the grid voltage Vs has a lower amplitude than the load voltage VL. In this case, the SAF delivers active power to the load, while the parallel active filter consumes active power. In Fig. 19(b), the grid voltage Vs has a higher amplitude than the load voltage VL. In this case, the SAF consumes active power, while the PAF filter delivers active power to the load. In an ideal situation when Vs is equal to VL, there is no active power…

Words 386 - Pages 2

Week 4 comments Essay

Computer Skills Implementation of IP Tracback Simulator as a branch of attacker detection mechanisms which is related to computer Security field Network administration skills LAN/WAN technologies TCP/IP networking knowledge ISA 2004, 2006 Active Directory 2003 C, C++ programming language VHDL SQL/PSQL MySql Win98, Win2000, Win XP, Vista, and Win2007, Win 8 Linux, Unix administration Office 2000, XP, 2003, and 2007, 2010 Computer maintenance ePolicy Orchestrator 4.0 ePolicy Orchestrator…

Words 475 - Pages 2

Research Paper On The Filter

Amanda Merkatz Marketing 360 Summer 2014 The Filter The decision that the Filter has is to decide on is, what service it is going to market to companies industries other than media, entertainment, and technology. The factors that are important in understanding this decision being made is that when looking at finding other industries that have a large customer bases, financial stability, active online use, and growth opportunities are in touch with new and popular trends is that the important factors…

Words 332 - Pages 2

CHEM POL 03 isolation of protein and sugar from milk student Essay

which are present in whole milk, are not isolated in this experiment because powdered nonfat milk is used. After isolation of the various chemical compounds, characterization of the optically active compounds can be performed using polarimetry. The sugar isolated in this experiment, α-lactose, is optically active and slowly interconverts to β-lactose in water: α-lactose β-lactose [α] = 92.6° [α] = 34.0° A compound will consistently have the same specific…

Words 1675 - Pages 7

Kare 4 Cali Case Study

do or how they can improve the situation.” Though this is currently only the second year as an active club, they have already connected with a lot of the student body. In the beginning of the year the Club decided that they would sell 5$ aluminum Kare4Cali re-usable water bottles and all the profits would go back into the school. The club intends on having the money raised be used to purchase water filters for the fountains and help fund machines to refill the reusable bottles. Besides this business…

Words 546 - Pages 3

Nephro Kap Essay

Kidney Secretes Hormones A. renin(digests circulating proteins), B.1,25 dihdroxy-Vit D(active Vit D) secreted in proximal tubule -Vit D job to reabsorb ca and phosphate from Gut if you have renal failure you cant secrete this Active Vit D and might have probe absorbing ca C. Erythropoietin -problem with kidney means Anemia Kidney Excretes Waste Products(urea, creatinine) Responsible Water Balance Acid/Base Balance -HCL from red meat we have to get rid of Hydrogen Ions in urine…

Words 3730 - Pages 15

Uninterruptible Power Supply Case Study

Uninterruptible power supply (UPS) systems give continuous and reliable electrical power to loads in times of unexpected power failure. By connecting the UPS inverters in parallel, its capacity is expandable. Parallel operation of inverters has advantages, it increases system efficiency, provides redundancy and modularity. Parallel operation of inverters is difficulty due to the physical differences between the inverters and the load mismatch, circulation of current among the inverters takes place…

Words 3025 - Pages 13

Essay about Apocrine Sweat Gland Bacteria 3

present in the auxillae and only if the subject is in puberty or past puberty. It is expected that the Staphylococcus will be susceptible to underarm deodorants, deodorant soaps, and all of the detergents. Apocrine sweat glands are glands that become active with puberty. Apocrine sweat glands produce merocrine secretions. These secretions are a nutrient source for bacteria. When the bacteria feed on the the secretions, their by-product creates the pungent smell known as body odor. These glands produce…

Words 1016 - Pages 5

Essay On Coral Reefs

encrusting and help cement the reef together. They are particularly important on reef crests. * * Sponges help clean and filter surrounding water. They need constant water flow through their bodies and the skeleton can be made of calcium carbonate. They can have endosymbionts. * * Molluscs-Bivalves-Giant clams have a two-part shell and most are filter feeders. Epifauna and infauna. The mantle of a giant clam contains zooxanthellae. * * Molluscs-Gastropods-Nudibranch are…

Words 326 - Pages 2