The document discusses transmission line parameters and modeling. Unit I covers the structure of power systems and parameters of transmission lines including resistance, inductance, capacitance, symmetrical and unsymmetrical spacing, and effects of skin and proximity. Transmission line performance is modeled as short, medium and long lines with equivalent circuits in Unit II. Unit III covers mechanical design of overhead lines including tower types and insulator types. Underground cable types and parameters like capacitance and heating are covered in Unit IV. Unit V discusses distribution systems including voltage control techniques and types of substations.
Alternating current (AC) is the main driving force in the industries and residential areas, but for the long transmission line (more than 650 KM) AC transmission is more expensive than that of direct current (DC). Technically, AC transmission line control is more complicated because of the frequency. DC transmission does not have these limitations, which has led to build long HVDC transmission lines over the last 40 years. HVDC technology made possible to transfer bulk power over long distances.
Alternating current (AC) is the main driving force in the industries and residential areas, but for the long transmission line (more than 650 KM) AC transmission is more expensive than that of direct current (DC). Technically, AC transmission line control is more complicated because of the frequency. DC transmission does not have these limitations, which has led to build long HVDC transmission lines over the last 40 years. HVDC technology made possible to transfer bulk power over long distances.
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.
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.
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.
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.
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.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
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.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
2. UNIT I
TRANSMISSION LINE PARAMETERS
• Structure of Power System - Parameters of
single and three phase transmission lines with
single and double circuits -Resistance,
inductance and capacitance of solid, stranded
inductance and capacitance of solid, stranded
and bundled conductors, Symmetrical and
unsymmetrical spacing and transposition –
application of self and mutual GMD; skin and
proximity effects -Typical configurations,
conductor types and electrical parameters of
EHV lines.
3. UNIT II
MODELLING AND PERFORMANCE OF
TRANSMISSION LINES
• Performance of Transmission lines - short line,
medium line and long line – equivalent
circuits, phasor diagram, attenuation constant,
phase constant, surge impedance -
phase constant, surge impedance -
transmission efficiency and voltage regulation,
real and reactive power flow in lines – Power
Circle diagrams - Formation of Corona –
Critical Voltages – Effect on Line
Performance.
4. UNIT III
MECHANICAL DESIGN OF LINES
• Mechanical design of OH lines – Line
Supports –Types of towers – Stress and Sag
Calculation – Effects of Wind and Ice loading.
Insulators: Types, voltage distribution in
Insulators: Types, voltage distribution in
insulator string, improvement of string
efficiency, testing of insulators.
5. UNIT IV UNDER GROUND CABILITYS
• Underground cabilitys - Types of cabilitys –
Construction of single core and 3 core
Cabilitys - Insulation Resistance – Potential
Gradient - Capacitance of Single-core and 3
Gradient - Capacitance of Single-core and 3
core cabilitys -Grading of cabilitys - Power
factor and heating of cabilitys– DC cabilitys.
6. UNIT V DISTRIBUTION SYSTEMS
• Distribution Systems – General Aspects –
Kelvin’s Law – AC and DC distributions –
Techniques of Voltage Control and Power
factor improvement – Distribution Loss –
factor improvement – Distribution Loss –
Types of Substations -Methods of Grounding –
Trends in Transmission and Distribution:
EHVAC, HVDC and FACTS (Qualitative
treatment only).
11. Magnetic field intensity inside the conductor
• Since, the current density (Ix/a’ = I/a) is same throughout the
conductor,
a’ : area of the conductor at radius x
a : area of the conductor at radius R
• Using Ampere’s law,
a : area of the conductor at radius R
27. Transposed Lines
• Transposing of power conductors means changing the position of
phase conductors at regular interval along the line so that each
conductor occupy others positions over an equal distance, as in
Figure.
• If transmission lines are not transposed, the voltage drop in the
transmission line will not be the same due to unequal inductances.
Transposition of lines
36. • For the voltage rating more than 230 kV, it is not possible to use the
round conductors due to excessive corona loss.
• It is preferred to have the hollow conductor, normally in substations,
and bundled conductors in transmission lines.
The main advantages of using bundled conductors are:
• Reduced corona loss
• Reduced corona loss
• Reduced voltage gradient at the surface of the conductor
• Low reactance due to increase in the self-GMD
• Reduced radio interference
• Increase in capacitance
• Larger loading capability and
• Increase surge impedance loading.
37. Resistance of Transmission lines
• The transmission capacity of a line mainly depends on the
inductance and the capacitance, as resistance and conductance are
very small.
• The resistance used for analysis of transmission line performance is
the effective (or ac) resistance. The direct current resistance (Rdc) of
a conductor is defined as,
a conductor is defined as,
• The ac resistance is more than dc resistance due to skin effect.
38. SKIN EFFECT
• The alternating current distribution in a wire is not uniform. The
current density near the surface is more than near to the centre. It is
affected by the frequency of the current. If the frequency of current is
more, the current distribution is more non-uniform. This effect is
known as skin effect.
• Due to this effect the effective resistance (or ac resistance of the
• Due to this effect the effective resistance (or ac resistance of the
conductors) becomes more than the direct current (dc), where the
current distribution is uniform.
39. PROXIMITY EFFECT
• Like skin effect, the proximity effect also increases the resistance of
the conductor.
• The alternating flux in a conductor caused by the current flowing in
neighbouring conductors gives rise to circulating currents, which
cause the non-uniformity of the current and thus increases resistance.
• This effect is more pronounced in cable where the phase conductors
are nearer to each other. The proximity effect is negligible in
overhead transmission line.
• Both skin effect and proximity effect depend on the conductor size,
frequency of the supply, resistivity and permeability of the conductor
material.