Free download of Power Quality by Andreas Eberhard. Available in PDF, ePub and Kindle. Read, write reviews and more. 𝗣𝗗𝗙 | Abstract The quality of electric power depends on the power network topology, the amount of Book · January with 6, Reads. the term power quality. What is power quality? Power quality, as defined in this book, is “a set of electrical boundaries that allows equipment to function in its.
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Poor power quality is characterized by electrical disturbances, such as transients, power quality issues that lead to production disturbances and lost data. Power Quality Voltage Quality. The common term for describing the subject of this book is power qual- ity; however, it is actually the quality of the voltage that. Power Quality Through Better Wiring and. G di P ti. Grounding The real cost of poor power quality e ea costo poo po e qua ty Source: IEEE Emerald Book.
Worldwide researches are going on to address those issues. Electric Power Quality has evolved from the researches carried out by the authors.
About the authors Surajit Chattopadhyay has obtained B. And Ph. He has been involved in research work on power quality in the Department of Applied Physics. He has authored 35 papers published in international and national journals and conferences.
Three of his papers have been selected as best paper in international level. He has industrial experience on computer interfacing in electrical applications and for last eight years he has been involved in teaching profession in degree and post graduate level. His field of interest includes power system protection, power quality and computer interfacing in electrical applications. He has coauthored one book on Basic Electrical Engineering. Madhuchhanda Mitra has obtained B. All these create power quality problems.
Furthermore, to reduce labor costs for operation, and to increase reliability of supply, single-pole auto recloning is employed. In addition to these negatives, unbalanced distortion of three-phase voltages can occur if there are significant single-phase loads e. Hence, this reference book was undertaken to cover in a single volume all of these different topics: power quality; harmonics—their sources, analysis, measurement, and monitoring; harmonic filters and their design; harmonic standards; SVCs in main transmission systems, and SVCs for compensating traction loads to reduce flicker due to arc furnaces, that is, for load balancing, power factor improvement, and improving power system damping in general.
Some professional engineers may have to write specifications for the download of the equipment and later may be involved in their operation and maintenance. Others may be working on single-pole autoreclosing projects and the design of neutral reactors in four-reactor schemes to improve reliability of supply, transient stability, and also other traditional reactive compensation devices like shunt capacitors and shunt reactors. In a few cases, series capacitors to increase transmitted power are used.
All these are reviewed. Chapter 2 discusses SVCs used in main transmission systems, as well as those used to correct unbalances due to traction loads. As wye—delta transformers are generally used with these SVCs, expressions are derived to relate the active and reactive powers from the delta side to the wye side and vice versa to enable the choice of the SVC transformer rating and associated harmonic filters.
Chapter 3 deals with the control of the SVCs both for main transmission systems and those used to compensate unsymmetric traction single-phase loads—noting the difference that whereas the transmission SVC has equal rating across the phases AB, BC, and CA, the SVCs used in the traction system have rather unequal ratings across phases AB, BC, and CA to reduce the cost of capacitors used in the system.
Chapter 4 considers harmonics and their sources. Chapter 5 describes the utility harmonic regulations and standards. The main philosophical differences between these two sets of standards are discussed.
Application of the IEEE to a utility system involves many practical issues. How these issues are handled in the British Columbia hydro system is also covered in this chapter. Chapter 6 focuses on the undesirable effects of harmonics and mitigation techniques.
The design details of the tuned filters, filter components, their tolerance variation, and the relative merits of the tuned and damped filters are included. To enable readers to perform a harmonic scan, models of the common power system elements like generators, transformers, and transmission lines loads, etc.
Chapter 7 presents the computation tools that are available for the design and analysis of SVCs and harmonic filters. The relative merits of the digital and analog computers and the special problems that power electronic circuits present using either digital or analog computers are discussed.
The main differences are in the representation of loads and transformer taps. In the positive sequence, power flow loads are represented as constant P and Q loads, whereas in three-phase power flow programs they are represented as constant impedances to ensure convergence.
In the three-phase transformer models, the magnitude of one line-voltage controls the taps on the other two-line voltages; also taps move uniformly on all the three phases.
In the positive-sequence power flow, only one primary say, HV and secondary voltage say, LV needs to be considered, and the taps control only one of these voltages.
Chapter 8 is devoted to the different aspects of monitoring power quality. Commonly available commercial instruments are briefly described.
The method for the measurement of frequency response of the instrument transformers by Prof. Sakis Eliopoulos and his group at Georgia Institute of Technology is described in some detail.
Miller and Michael B. Dewe at the University of Canterbury in New Zealand is included. Brief details of two projects needing harmonic survey in the Powerlink Queensland system in Australia are described, as well as the IEC flicker meter specification to measure flicker due to the arc furnaces. Chapter 9 presents the constructional details of HV reactors and the considerations involved in the choice of their location at the end of EHV lines, tertiary windings of transformers, etc. Brief recommendations from the field tests of several projects regarding the secondary arc current are found in this chapter.
Chapter 10 describes the use of shunt capacitors for reactive compensation and power factor correction.
An expression was derived for the percentage of overvoltage of the remaining units when some units have failed in a series group. This is helpful in the design of the capacitor banks, as it is essential to ensure that the remaining units are not unduly stressed when some units fail. Protection of the capacitor banks with different configurations grounded or ungrounded, double wyes, series capacitors, etc.
Series capacitor applications and an NGH damping scheme to avoid subsynchronous resonance are described, in addition to metal oxide arresters, their modeling, and calculation of their parameters for use in ATP program.
Their typical ratings in different power systems with different voltages are included.
Chapter 11 presents fast Fourier transforms FFT. Most older engineers experience considerable difficulty in grasping this subject.
Nowadays, most harmonic instrumentation utilizes FFT techniques. Hence, a reasonable understanding of this topic is essential for intelligent choice of sampling interval and to avoid the other pitfalls while using FFT techniques. Also, some computational details such as in-place calculations and bit reversal are explained. Initially, the results were illustrated with eight-point transforms and later extended to the general case. This number is very small compared with N2, which will be the number of operations required if the straightforward procedure is adopted for the calculation of the DFT.
Also some guidelines for using the FFT for harmonic analysis are provided.
Finally, who would benefit from reading this reference? It will be useful for most practicing engineers, whose responsibilities include power quality problems, harmonics, enforcement of the standards, analysis and measurement of harmonics, SVCs both in main transmission and traction applications , reactive compensation using shunt reactors and capacitors, protection of capacitor banks, MOV arresters for insulation coordination, and single-pole autoreclosing.
Also finding it valuable should be professional engineers who may have to write specifications for the download of equipment and later oversee their operation and maintenance.
Some others who will find it useful will be involved in single-pole autoreclosing projects and the design of neutral reactors in four-reactor schemes to improve reliability of supply. This book also can be used by senior students and first-year graduate students in power system courses.
Although some universities might have specialized power quality courses, most will spend at least a quarter of a year dealing with power quality topics in their power system courses.
The majority of the topics discussed here will need a computer to perform the involved calculations. These days many students are exposed to some basic programming, and they have some programming skills. Further, several commercial packages are available for use in the industrial environment and universities. Hence, depending upon the facilities available for a particular institution, the instructor can suggest some manageable projects to the students. Further, if there is a collaboration between a utility and a local university, then some of the problems in the industry can be taken as relevant by the concerned professor and solved with the help of graduate students.
In the initial stage of this project, the authors were considering a book much more limited in scope, more in the style of a monograph. It was Nora Konopka who encouraged the authors to embark on much broader coverage, developing it into a reference book. Although there are books and several papers in technical journals covering power quality, harmonics, FFT, and other related subjects in depth, there is no single book with the comprehensiveness of this volume. Hence, the authors are confident that this broad coverage will appeal to many practicing engineers and students.
All rights reserved. Further information on the IEC is available from www. IEC has no responsibility for the placement and context in which the extracts and contents are reproduced by the author, nor is IEC in any way responsible for the other content or accuracy therein. The authors would like to thank the following organizations to reproduce the material from their Web sites: a.
Siemens—PTI b. Electrotek Concepts, Inc. DSP Development Corporation d.