1. The document discusses transmission line parameters and types of transmission lines. It covers resistance, inductance, capacitance and other constants of transmission lines.
2. Different types of conductors used for transmission lines like ACSR, AAAC, and bundled conductors are described. Factors to consider while designing transmission lines are also outlined.
3. Skin effect and proximity effect, which cause non-uniform current distribution in conductors, are explained. Both effects increase resistance and depend on frequency, diameter, and spacing of conductors.
Main component parts of the overhead line
The most effective method of providing protection to transmission lines against direct lightning strokes is by use of overhead ground wires as shown in Fig 6. For simplicity, one ground wire and one line conductor are shown. The ground wires are placed above the line conductors at such positions that practically all lightning strokes are intercepted by them (i.
e. ground wires). The ground wires are grounded at each tower or pole through a low resistance as possible. Due to their proper location, the ground wires will take up all the lightning strokes instead of allowing them to line conductors. The degree of protection provided by the ground wires depends upon the footing resistance of the tower.
Main component parts of the overhead line
The most effective method of providing protection to transmission lines against direct lightning strokes is by use of overhead ground wires as shown in Fig 6. For simplicity, one ground wire and one line conductor are shown. The ground wires are placed above the line conductors at such positions that practically all lightning strokes are intercepted by them (i.
e. ground wires). The ground wires are grounded at each tower or pole through a low resistance as possible. Due to their proper location, the ground wires will take up all the lightning strokes instead of allowing them to line conductors. The degree of protection provided by the ground wires depends upon the footing resistance of the tower.
It is based on current transformer description
It's working and applications are present in it ,it also includes videos of it's windings and it's inrush ability of transformer, and also about instrument transformer and it's working with applications.Current transformers are used-in measuring high currents and connected with it in parallel to it
HVDC Transmission System Today's Upgrading TechnologyDixit Patel
High Voltage Direct Current Transmission line is highly use in today's generation for long power transmission system because it has many great advantages over HVAC Transmission system. It's requires low transmission line space and more space we can use around transmission line over HVAC transmission line.
Extra high voltage long ac transmission linesShivagee Raj
From economical point of view designing of transmission line system is very important in the electricity supply system. Extra High Voltage Transmission Lines are best suited for transmission of bulk power.
It is based on current transformer description
It's working and applications are present in it ,it also includes videos of it's windings and it's inrush ability of transformer, and also about instrument transformer and it's working with applications.Current transformers are used-in measuring high currents and connected with it in parallel to it
HVDC Transmission System Today's Upgrading TechnologyDixit Patel
High Voltage Direct Current Transmission line is highly use in today's generation for long power transmission system because it has many great advantages over HVAC Transmission system. It's requires low transmission line space and more space we can use around transmission line over HVAC transmission line.
Extra high voltage long ac transmission linesShivagee Raj
From economical point of view designing of transmission line system is very important in the electricity supply system. Extra High Voltage Transmission Lines are best suited for transmission of bulk power.
Bundle conductors in transmission line chandan kumar
Bundled Conductors are used in transmission lines where the voltage exceeds 230 kV.
At such high voltages, ordinary conductors will result in excessive corona and noise which may affect communication lines.
The increased corona will result in significant power loss. Bundle conductors consist of three or four conductors for each phase.
The conductors are separated from each other by means of spacers at regular intervals. Thus, they do not touch each other.
Loadability of line is defined as the extent of load which can flow through the line without exceeding the limitations. Line Loadability is expressed in percentage of Surge Impedance Loading of line. The limiting factor for line loading are: thermal limit, voltage drop limit and steady state stability.
In this PPT you will learn the basics of electrical power transmission and distributuion, Basic components of power system, factors to be considered for erection of Overhead lines, etc.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
CW RADAR, FMCW RADAR, FMCW ALTIMETER, AND THEIR PARAMETERSveerababupersonal22
It consists of cw radar and fmcw radar ,range measurement,if amplifier and fmcw altimeterThe CW radar operates using continuous wave transmission, while the FMCW radar employs frequency-modulated continuous wave technology. Range measurement is a crucial aspect of radar systems, providing information about the distance to a target. The IF amplifier plays a key role in signal processing, amplifying intermediate frequency signals for further analysis. The FMCW altimeter utilizes frequency-modulated continuous wave technology to accurately measure altitude above a reference point.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
4. Introduction
• The energy is neither be created nor be destroyed
but it can be converted from one form to another.
• The various energy sources
1. Burning coal oil
2. Natural gas
3. Water stored in dams
4. Diesel oil
5. Nuclear power
6. Other non conventional energy sources
5. Introduction
• Depending upon the source of energy used, these
stations are called thermal power station,
hydroelectric power station, diesel power station,
nuclear power station etc.
• The generated electric power is to be supplied to the
consumers.
• Generally the power stations are located too far away
from the town and cities where electrical energy is
demanded.
• Hence there exists a large network of conductors
between the power stations and the consumers.
• The network is broadly classified into two parts
1. Transmission
2. Distribution
6. A Typical Transmission and Distribution
Scheme
• The flow of electrical power from the generating
station to the consumer is called an electrical
power system or electrical supply system.
• It consists of the following important components
1. Generating station
2. Transmission network
3. Distribution network
9. Components of Distribution
• The distribution scheme consists of following
important components.
1. Substation
2. Local distribution scheme
3. Feeders
4. Distributors
5. Service mains
16. S.No. Underground System Overhead System
1. Transmission is by using cables Transmission is by using the transmission
lines
2. All the cables must be properly
insulated from each other
The appropriate spacing provided between
the conductors acts as an insulation. No
external insulation is necessary
3. The insulation cost is very high No transmission cost as air acts as an
insulator
4. Transmission over long distance is not
possible as laying of cables is difficult,
costly and complicated
Transmission over long distance is possible
with the help of transmission lines.
5. The voltage level used is below 66 kV
due to insulation difficulties
The voltage level used can as high as 400 kV
6. The maintenance cost is less The maintenance cost is high
7. The faults due to lightning, short circuit,
storms etc. are eliminated
The occurrence of faults due to lightning,
short circuits, storms and abnormal
weather conditions are possible.
8. It is very safe due to insulation used The conductors are bare without insulation
hence dangerous
17. S.No. Underground System Overhead System
9. Maximum stress is on the insulation
between the conductors
Maximum stress is between conductor and
earth
10. The beauty of the area, towns etc. is
well maintained
The beauty of the area gets affected due
to overhead lines. Sometimes trees are
required to be cut
11. The size of the cables is high The size of the conductors is less
12. The voltage drop is less The voltage drop is more
19. Constants of a Transmission Line
• Resistance
• Inductance
• Capacitance
20. Constants of a Transmission Line
Resistance:
• It is the opposition of line conductors to current
flow. The resistance is distributed uniformly along
the whole length of the line as shown in Fig. (i).
• However, the performance of a transmission line
can be analysed conveniently if distributed
resistance is considered as lumped as shown in
Fig.(ii).
21. Constants of a Transmission Line
• Inductance:
• When an alternating current flows through a
conductor, a changing flux is set up which links the
conductor.
• Due to these flux linkages, the conductor
possesses inductance.
• Mathematically, inductance is defined as the flux
linkages per ampere i.e.,
22. Constants of a Transmission Line
• Capacitance:
• We know that any two conductors separated by an
insulating material constitute a capacitor.
• As any two conductors of an overhead
transmission line are separated by air which acts
as an insulation, therefore, capacitance exists
between any two overhead line conductors.
• The capacitance between the conductors is the
charge per unit potential difference i.e.,
• Capacitance, C = q/v farad
24. Factors to be considered while Designing
Transmission Line
• Type and size of conductors
• Voltage level
• Line regulation and control of voltage
• Efficiency of transmission
• Corona loss
• Power flow capability and stability
• Requirement of compensation
• Levels of faults at various bus bars and requirement of
new circuit breakers
• Grounding needs
• Protection schemes for new lines
• Coordination of insulation
25. Factors to be considered while Designing
Transmission Line
• Mechanical design aspects which include stress
and sag calculations, compensation of conductor,
spacing of conductor and configuration for
insulators.
• Design of power system structure
• Economical aspects
26. Requirements of Transmission Line Conductors
• They should have low weight
• They should have high tensile strength and fatigue
strength
• They must have high conductivity
• They should have low co-efficient of expansion,
low corona loss
• They should have less resistance and low cost
The conductors used in practice are made up from
the materials such as copper, aluminium and their
alloys.
27. Aluminum Transmission Line Conductors
• The advantages of using aluminium conductors
over copper conductors are
1. They have low cost
2. Less resistance and corona loss
3. Less weight
• But aluminium has less tensile strength, high co-
efficient of expansion and large area which
restricts it use alone as a conductor.
28. Stranded Conductors
• Stranded conductors have three or more
strands of conductor material twisted
together to form a single conductor.
• Stranded can carry high currents and are
usually more flexible than solid conductors
29. Types of Aluminum Transmission Line
Conductors
• AAC - All aluminium conductors
• AAAC - All aluminium alloy conductor (Silmalec-
0.5% of silicon & 0.5% of magnesium)
• ACSR - Aluminium conductors with steel
reinforcement
• ACAR - Aluminium conductors with alloy
reinforcement
42. SKIN EFFECT
• When a conductor is carrying steady direct
current (d.c.), this current is uniformly
distributed over the whole X-section of the
conductor.
• However, an alternating current flowing through
the conductor does not distribute uniformly,
rather it has the tendency to concentrate near
the surface of the conductor as shown in Fig.
This is known as skin effect.
43. SKIN EFFECT
• The tendency of alternating current to
concentrate near the surface of a conductor is
known as skin effect.
44. SKIN EFFECT
• Due to skin effect, the effective area of cross-
section of the conductor through which current
flows is reduced.
• Consequently, the resistance of the conductor is
slightly increased when carrying an alternating
current.
• The cause of skin effect can be easily explained.
A solid conductor may be thought to be
consisting of a large number of strands, each
carrying a small part of the current.
45. SKIN EFFECT
• The inductance of each strand will vary
according to its position. Thus, the strands near
the centre are surrounded by a greater magnetic
flux and hence have larger inductance than that
near the surface.
• The high reactance of inner strands causes the
alternating current to flow near the surface of
conductor.
• This crowding of current near the conductor
surface is the skin effect.
46. SKIN EFFECT
• The skin effect depends upon the following
factors :
1. Nature of material
2. Diameter of wire − increases with the diameter
of wire.
3. Frequency − increases with the increase in
frequency.
4. Shape of wire − less for stranded conductor
than the solid conductor.
• It may be noted that skin effect is negligible
when the supply frequency is low (< 50 Hz) and
conductor diameter is small (< 1cm).
47. PROXIMITY EFFECT
• The current distribution may be non-uniform
because of another effect known as proximity
effect.
48. PROXIMITY EFFECT
• Let each of the line conductor is assumed to be
divided into 3 sections having equal cross sectional
area. Three parallel loops are formed by the pairs
xx', yy' and zz'.
• The flux linking loop xx' is least and it increases for
the remaining loops. Thus the inductance of inner
loop is less. Thus the current density is highest at
inner edges of the conductor.
• Due to this non-uniform distribution of current, the
effective conductor resistance increases. As the
distance between the conductors goes on reducing,
this distribution of current becomes more and more
non-uniform.
49. PROXIMITY EFFECT
• For normal spacing of overhead lines this
proximity effect is negligible. For underground
cables this effect is significant as the conductors
are located close to each other.
• The proximity effect also depends on the same
factors as that of skin effect.