Word Files
Reference for Downloading Educational Files
  2. Electrical Engineering
  3. Preparing a scientific and software model for the design of compact bundle lines in order to use the privacy of existing lines for higher power transmission

Preparing a scientific and software model for the design of compact bundle lines in order to use the privacy of existing lines for higher power transmission

Number of pages: 101 File Format: word File Code: 32221
Year: 2013 University Degree: Master's degree Category: Electrical Engineering
Tags/Keywords: Compact line design - Compact transmission lines - Compact transmission lines - Natural power transmission - Privacy of transmission lines - Shunt reactor - Transmission lines - Vertical distances
  • Part of the Content
  • Contents & Resources

  • Summary of Preparing a scientific and software model for the design of compact bundle lines in order to use the privacy of existing lines for higher power transmission

    Dissertation for receiving the master's degree "M.Sc."

    Electrical engineering field - control orientation

    Abstract:

    One ??of the effective methods that has been the focus of electricity officials in recent decades is the use of existing lines to build new lines with higher voltage. It is natural that with the increase in voltage, the width of the boundary on both sides of the new transmission lines increases, which should be solved by using different methods. In such cases, it is necessary to adjust the characteristics of the new power transmission lines with the existing characteristics by reducing the width of the towers of new lines and using suitable arrangements of conductors, chain of insulators. Due to the fact that in the design of compact transmission lines, it is possible to reduce the width of the towers to some extent, so these types of lines can be a suitable option for use in the existing lines.

    In order to determine the appropriate phase distances, various factors such as switching overvoltage, lightning overvoltage, jumping fluctuations of conductors or galloping, pendulum fluctuations of conductors and insulators are involved, which have been investigated and studied in this project. Also, in this project, according to the new standards and articles published in this field, an appropriate method for calculating the vertical and horizontal distances of the phases has been presented. Also, in this project, the design of these lines has been considered and followed with an emphasis on the electrical design of the bundle arrangement. At the same time, the importance of power transmission in natural power has been paid attention to and the solutions for its realization have been understood and explained with relevant rich mathematical relationships. Related technical/mathematical knowledge, design of a modern line sample and related application curves are among the achievements of this project

    Key words: compact transmission lines, vertical and horizontal distances of phases, transmission line privacy, natural power transmission, controllable shunt reactor

     

    Compact or compact transmission lines, as their name implies, refer to lines whose tower dimensions and sizes are smaller compared to normal transmission lines, or so-called compact lines can be considered a compact state (in terms of the dimensions and physical size of the tower) of normal transmission lines [1]. The main reason for the trend towards compact lines can be seen in the following two factors:
    [2-19] :

    The increasing demand for electric energy has caused the need to build and develop transmission lines. The construction of a new line, in addition to the need for high investment costs, also entails marginal issues, the most problematic of which is providing the necessary privacy for the line. With the increase in the voltage level of the line, the amount of privacy also increases to a significant amount, and in such a situation, when the transmission lines pass through the forests, a large amount of trees must be cut, and when passing through the agricultural lands, there will be many problems to occupy and acquire the land, and in some cases, the price of the land increases exponentially, especially when the transmission lines pass and approach the big cities. New lines, the question has always been raised whether there is a way to make maximum use (transfer as much power as possible) of the corridor provided due to the problems of the above paragraph?

    The answer to both needs was realized with the invention of compact lines In the lines equipped with normal towers, there is no phase-phase distance, the distance between phases is two phase-ground air distances in series with each other due to the tower body located between the phases. In compact lines, by changing the type of tower and removing the metal skeleton in the distance between the phases, the phases are located directly next to each other and are isolated from each other by the insulating chain between the phases. In this way, the average geometric distance of the phases is greatly reduced compared to conventional towers[20].

    Compact lines can be classified according to the arrangement of bundles and towers. But before examining the classification of compact lines, it is necessary to pay attention to the following points.

    What usually comes to mind from the name compact lines are lines that are smaller and more compact compared to normal lines. But it is important to pay attention to the fact that one of the most important goals of creating compact lines is to increase the natural strength of the line in addition to reducing the width of the corridor. In this regard, four methods are proposed to increase the natural power of the line[21-33].

    a) increasing the number of subconductors in the bundle

    b) using a larger diameter for the bundle circle

    c) placing the subconductors in other forms than the symmetrical circle state

    d) close Connecting the phases to each other

    Calculating and determining the distances of the phases from each other or with the ground or the body of the phases depends on several parameters according to which the conductors are placed on the bases. It is natural that as the distance between the phases increases, this action reduces the possibility of sparks in the conditions of over-switching or lightning between the phases together or the ground, and thus increases the reliability of the power supply. On the other hand, increasing the distance between the phases has disadvantages, some of which are as follows:

    - The width of the towers or bases increases

    - The height of the towers increases

    - The bandwidth increases

    - The weight and price of the towers or bases increases found

    - The number of insulators and the length of the insulator chain increase

    Therefore, although increasing the phase intervals may be good and suitable on the one hand, on the other hand, in many cases, there is no economic justification. In compact transmission lines, where the goal is to use different tricks to reduce the dimensions of the bases, reducing the phase distances is of high importance.

    At any level of voltage, by accepting more risk, the phase distances can be reduced. For this reason, depending on the percentage of risk taking, the intervals can be reduced or increased, although several models and relationships have been presented to calculate fuzzy horizontal or vertical distances, but there is still no single relationship that has general acceptance. The reason for the existence of these disagreements is the presence of several parameters such as: factors effective in the production of overvoltages, factors effective in the range of fluctuations of conductors, atmospheric conditions of the route, design conditions of power transmission lines.

    In order to determine the appropriate phase distances, various factors such as switching overvoltage, lightning overvoltage, jumping fluctuations of conductors or galloping, pendulum fluctuations of conductors, arrangement of conductors and insulators are involved, which need to be investigated and studied. take In this report, an attempt is made to provide a suitable method for calculating the vertical and horizontal distances of the phases according to the new standards and articles published in this field. The expansion and development of cities causes an increase in the amount of electrical energy consumption, which requires the construction and development of power transmission and distribution networks, which is simply not practical in large cities. It is natural that as the amount of electric energy requested increases, it is necessary to increase the voltage of new transmission lines, in such a case the following problems are observed: style="direction: rtl;">Increasing the width of the pass band

    Using compact power transmission lines and bringing the phases closer using different methods are the methods used to reduce the occupied land area.

    2-2- Definition of lines Compact transmission

    Line compaction refers to all the tricks and methods that are effective in bringing the horizontal and vertical distances of the phases closer together. It is natural that the approximation of the phases itself depends on many other factors that are included in the collection of knowledge related to compact transmission lines.

  • Contents & References of Preparing a scientific and software model for the design of compact bundle lines in order to use the privacy of existing lines for higher power transmission

    List:

     

    Abstract: 1

    Chapter 1 – Research overview: 2

    Introduction: 3

    Chapter 2 – Characteristics of compact bundle transmission lines and basic definitions: 6

    2-1- Introduction: 7

    2-2- Definition of compact transmission lines. 7

    2-3- Advantages and disadvantages of compact transmission lines. 8

    2-3-1- Advantages of compact transmission lines- Some of the advantages of compact transmission lines are as follows: 8

    2-3-2- Disadvantages of compact power transmission lines- In addition to the advantages mentioned above, some of the disadvantages of this type of power transmission lines are as follows: 8

    2-4- Bundle lines. 9

    2-5- The width of privacy. 10

    Chapter 3 - The role of electrical factors in phase distances: 11

    3-1- Introduction: 12

    3-2- Determining the minimum air gap from the point of view of switching overvoltage. 12

    3-2-1- EPRI model 13

    3-2-2- CRIEPI model 13

    3-2-3- IEEE model. 14

    3-2-4- Comparison of models 15

    3-3- Minimum air distance from lightning point of view. 16

    3-4- The minimum length of the chain of insulators 18

    3-5- Summary. 20

    Chapter 4 - The role of conductor fluctuations in phase intervals: 21

    4-1- Introduction. 22

    4-2- Pendulum oscillations. 22

    4-2-1- Reducing the phase distance on the tower. 24

    4-2-2- Reducing the distance between the phases in the middle of the bases 24

    4-3- Leap oscillations. 26

    4-3-1- First method- Galloping oval. 26

    4-3-2- second method- logarithmic model (simple lines and bundles) 28

    4-3-3- third method- model related to wind speed and flash. 29

    4-3-4- Fourth method- Linear model with conductor diameter. 31

    4-3-5- The fifth method - Non-linear model with diameter (simple lines and bundles) 32

    4-3-6- Comparison of different models. 33

    Chapter Five - Determination of phase intervals: 36

    5-1- Introduction. 37

    5-2- Determining the horizontal distance of the phases to the body of the towers 37

    5-2-1- Using hanging insulators. 39

    5-2-2- V-shaped insulators. 40

    5-2-3- fixed insulators. 40

    5-3- Horizontal distance from phase to phase 41

    5-3-1- Horizontal distance from phase to phase that are placed on both sides of the tower. 43

    5-3-2- The horizontal distance between phases that are placed on one side of the tower. 44

    5-3-3- Phase-to-phase distance when using non-hanging insulators. 45

    5-4- Calculation of vertical distances of phases 45

    5-4-1- Vertical distance of phases in the tower with vertical placement of conductors 46

    5-4-2- Vertical distance of phases in the tower with triangular placement of conductors 47

    5-4-3- Vertical distance of phases in the tower based on fixed insulators. 48

    5-5- Calculating the vertical distance of two phases of a circuit in the middle of the span. 49

    5-5-1- Determining the vertical distance of phases in the middle of the bases for vertical arrangement of conductors 49

    5-5-2- Determining the vertical distance of phases in the middle of bases for triangular arrangement of conductors 50

    5-5-3- Determining the vertical distance of phases in the middle of bases for fixed insulators. 51

    5-6- Computational model of minimum vertical distance of phases 51

    5-7- Minimum horizontal distances from NESC point of view. 52

    5-7-1- Minimum aerial distance to the bases 52

    5-7-2- Minimum horizontal distance of phases in one circuit 52

    5-7-3- Minimum horizontal distance of phases in two different circuits. 53

    5-7-4- The horizontal distance of the phases according to fluctuations. 53

    5-8- Summary. 54

    5-8-1- The minimum horizontal distance between the phase and the tower body. 55

    5-8-2- The minimum horizontal distance of the phase to the surrounding facilities. 55

    5-8-3- The horizontal distance of two phases of a circuit 55

    5-8-4- The minimum vertical distance of phases at the top of the tower. 56

    5-8-5- Determining the minimum vertical distance in the middle of the bases 56

    Sixth chapter - Explanation of the technical knowledge of designing modern transmission lines: 58

    6-1- Introduction. 59

    6-2- The relationship between the natural power of the line and the dimensions and size of the bundle of conductors (bundle) 59

    Chapter 7 - General characteristics of power transmission lines and reactive power resulting from the electrical characteristics of transmission lines: 74

    7-1- Reactive power resulting from transmission lines [23, 25] 75

    7-2 Characteristics of power changes with load angle in transmission lines with shorter length From the length of the limit. 89

    Chapter 8 - Designing a sample of modern lines: 95

    8-1 Introduction. 96

    8-2 example about the design of a modern example of 220 kV line. 96

    Sources: 99

    Source:

     

    Electrical design book of power transmission lines, Godrat Elah Heydari, Publications. 96

    Sources: 99

     

    Source:

     

    Electrical Design of Power Transmission Lines, Godrat Elah Heidari, Publications of Tabesh Bargh Company, Tehran Regional Electric Company - February 1379.

    Book of Isolation Design of Energy Transmission Lines and Environment, Professor J-N-Alexandrov and Engineer Tahmasb Qoli Shahrukh Shahi, Danesh Amroz Publications - Tehran 1372.

    Reza Sirjani, Amir Mehrtash, "Determining the optimal design for the design of compact power transmission lines in the densely populated areas of northern Iran", 22nd International Electricity Conference, November 28-30, 1386, Tehran.

    Ghadrat Elah Heydari, Golnaz Sadat Mahdavikhah, "Research on reducing the phase distances of 63 towers" Mesh and telescopic kilovolt", 22nd International Electricity Conference, November 28-30, 2016, Tehran.

    Saeed Kamalinia, Amir Mehrtash, Mohsen Pourrafi Arabani, "The role of different arrangements of transmission line towers in the environmental effects of electrical equipment", 21st International Electricity Conference, November 22-24, 2015, Tehran.

    Ali Memar, Samad Qane. Ersi, Gholamreza Jafarzadeh, "The use of 4-circuit compact concrete structures in transmission and super distribution lines", the first specialized seminar on compact transmission lines, May 30 and 31, 2013, Mazandaran, Sari.

    Mohammed Mehdi Mansouri, "Increasing the capacity of transmission lines using composite conductors in line with the optimal use of the environment", the first specialized seminar on compact transmission lines, May 30 and 31, 2018. 1383, Mazandaran, Sari.

    Mirmalek Hatemnejad, Dawood Harfati Sobhani, "Design of 20 KV compact overhead lines", the first specialized seminar on compact transmission lines, May 30 and 31, 1383, Mazandaran, Sari.

    Moslem Mehrali Tabar Firouzjaei, Mohammad Taqi Abbasi Abloi, Morteza Fallah and Valuklai "Design of a 66 kV compact line using the compact method", the first specialized seminar on compact transmission lines, May 30 and 31, 2013, Mazandaran, Sari. Sari.

    Hassan Qolinejad Tepesari, Alireza Farazmand, "The use of compact four-circuit superdistribution lines in the energy transmission network of Mazandaran Province", the first specialized seminar on compact transmission lines, May 30 and 31, 2013, Mazandaran, Sari.

    Hossein Mohammadian, Alireza Farazmand, Hasan Qolinejad Tepehaseri, "Technical and economic review of bundling 63 kV lines two Existing tolerance", the first specialized seminar on compact transmission lines, May 30 and 31, 2013, Mazandaran, Sari.

    Mehrdad Darsirhaq, Payam Alami, Farhad Shahina, "Philosophy of privacy and compact lines", the first specialized seminar on compact transmission lines, May 30 and 31, 2014, Mazandaran, Sari.

    J.C.R. Hunt, DJ Richards, "Overhead Lines oscillation and the effect of Aerodynamic Dampers", IEE Proceedings, Vol.116 (11), PP.1869-1874, Nov.1969.

    Transmission line reference Book, 345 KV and above, Electric Power Research Institute (EPRI).

    Turan Gonen, "Modern Power system analysis", John Wiley and Sones, 1987.

    Turan Gonen, "Electric Power Transmission system engineering", John Wiley and Sones, 1988.

    Ramon de la Ross. . . , "contributions of lightning research for transmission line compaction", IEEE transaction on power delivery, Vol.3, No.2, April 1998.

    M.A. Baenzinger, W.D. James, . . "Dynamic Loads on transmission line structures due to galloping conductors", IEEE transaction on power delivery, Vol.9, No.1, January 1994.

    J.Hahn, S.Vlair, "Clearance calculation of conductors to building", IEEE transaction on power delivery. Vol.12, No.2 April 1997.

    J.B. Kim, J.W.Shim, "Switching over voltage analysis and air clearance design on the KEPCO 765 kV double circuit transmission system", IEEE transaction on power delivery, Vol.5, No.1, Januray 2012.

    J.L. Lilien, D.G. Havard, "Gallopong data base on single and bundle conductors prediction of maximum amplitudes", IEEE transaction on Power delivery, Vol.5, No. 2, April 2011.

    G. N. Alexandrov, Electrical Power Transmission, 2012.

    G. N. Alexandrov, Electrical Power Transmission, 2007.

    G. N. Alexandrov, Design of Compacted UHV Transmission Line, Moscow, Energoatomizdat, 1993.

    S. V

Preparing a scientific and software model for the design of compact bundle lines in order to use the privacy of existing lines for higher power transmission
How To Access The File
Related Contents:
Number of pages: 137 Category: Electronic Engineering

Dissertation for master's degree in electrical engineering, power trend. Abstract Overvoltages are one of the most important factors that destroy and threaten the insulation of power network equipment and often cause interruptions in service and reduce the quality of power and reliability of the system. In addition, transient overvoltages caused by lightning are more common and ...

Number of pages: 118 Category: Electrical Engineering

Dissertation for master's degree in electrical engineering, power trend. Abstract Overvoltages are one of the most important factors that destroy and threaten the insulation of power network equipment and often cause interruptions in service and reduce the quality of power and reliability of the system. In addition, transient overvoltages caused by lightning are more common and ...

Number of pages: 131 Category: Chemical - Petrochemical Engineering

Chemical engineering master's thesis without preface today simulation in processes can be an important tool to solve problems in different industries. A new idea that should be done in the real world by trial and error with a lot of costs and risks can be simulated in the environment of a strong software and the results can be used. Simulation can also be used to check and ...

Number of pages: 109 Category: Electrical Engineering

Dissertation for Master's Degree in Mechatronics Engineering Persian Abstract The purpose of this project is to introduce a new approach for troubleshooting gas transmission pipelines using mechanical waves, which is much cheaper and easier than other methods. who are currently working. These lines are usually located in difficult environmental conditions and far away and in ...

Number of pages: 110 Category: Electronic Engineering

Dissertation for Master's Degree in Mechatronics Engineering Persian Abstract The purpose of this project is to introduce a new approach for troubleshooting gas transmission pipelines using mechanical waves, which is much cheaper and easier than other methods. who are currently working. These lines are usually located in difficult environmental conditions and far away and in ...

Number of pages: 117 Category: Electronic Engineering

Dissertation for receiving a master's degree in the field of electricity, power orientation. Abstract In this thesis, the effect of return arc phenomenon on the performance of distance protection relay has been evaluated. Because the lightning striking the tower or the wire guard in the transmission lines can cause a return arc on the chain of insulators. Therefore, at first, ...

Number of pages: 117 Category: Electronic Engineering

Dissertation for receiving a master's degree in the field of electricity, power orientation. Abstract In this thesis, the effect of return arc phenomenon on the performance of distance protection relay has been evaluated. Because the lightning striking the tower or the wire guard in the transmission lines can cause a return arc on the chain of insulators. Therefore, at first, ...

Number of pages: 126 Category: Chemical - Petrochemical Engineering

Thesis for master's degree in the field: chemical engineering Abstract Hard polyurethane[1] is always considered one of the most effective and practical polymers in various industries, especially the coating industry. Excellent adhesive property, curing ability at ambient temperature and corrosion resistance of this polymer are some of its remarkable features. This study was ...

Number of pages: 118 Category: Electrical Engineering

Dissertation for receiving a master's degree in the field of electricity, power orientation. Abstract In this thesis, the effect of return arc phenomenon on the performance of distance protection relay has been evaluated. Because the lightning striking the tower or the wire guard in the transmission lines can cause a return arc on the chain of insulators. Therefore, at first, ...

Number of pages: 137 Category: Electronic Engineering

Introduction Flexible Power Transmission Networks (FACTS[1]), is one of the aspects of the electronic revolution that is happening in all fields of electrical energy. The concept of FACTS was first proposed in 1988 by Hingorani. In addition to the advantages of fast and reliable switching, the range of semiconductor power devices provides opportunities to value electrical energy ...