SlideShare a Scribd company logo
1 of 7
Download to read offline
Corona Effect
in transmission lines
Presented to Dr. Amlak
 What is Corona Discharge?
• Corona discharge is a process
by which a current flows in a
conductor with a
high potential into a neutral fluid,
usually air, by ionizing that fluid so
as to create a region
of plasma around the Conductor.
• The ions generated
pass charge to nearby areas of
lower potential, or recombine to
form neutral gas molecules.
• When the potential (electric field)
is large enough (33 KV =disruptive
potential gradient) the air ionizes
HV
• the ionized region continues to grow until it reaches
another conductor at a lower potential, a low resistance
conductive path between the two will be formed, resulting
in an electric arc, then a faint luminous glow of violet color
appears together along with hissing noise. This phenomenon is
called corona.
Welding Circuit breaker arc
real video
 Which factors affect
Corona? Conductor:
Corona Effect is considerably affected by the shape, size and surface
conditions of the conductor. Corona Effect decreases with increases in the
size of the conductor, this effect is less for the conductors having round
conductors compared to flat conductors.
 Line Voltage:
Corona Discharge effect is not present when the applied line voltages are
less. When the Voltage of the system increases corona Effect will be more.
 Atmosphere:
Breakdown voltage directly proportional to the density of the atmosphere
present in between the power conductors. In a stormy weather the ions
present around the conductor is higher than normal weather condition.
 Spacing between the Conductors:
Electro static stresses are reduced with increase in the spacing between
the conductors. Corona Discharge Effect takes place at much higher voltage
when the distance between the power conductors increases.
 How to reduce Corona ?
 By increasing the spacing between the conductors:
Corona Discharge Effect can be reduced by increasing the
clearance spacing between the phases of the transmission lines.
However increase in the phases results in heavier metal supports.
Cost and Space requirement increases.
 By increasing the diameter of the conductor:
Diameter of the conductor can be increased to reduce the corona
discharge effect. By using hollow conductors corona discharge
effect can be improved.
 By using Bundled Conductors:
By using Bundled Conductors also corona effect can be reduced
this is because bundled conductors will have much higher effective
diameter compared to the normal conductors.
 By Using Corona Rings or Grading Rings:
Corona Rings or Grading Rings are present on the surge arresters to
equally distribute the potential along the Surge Arresters or
Lightning Arresters which are present near the Substation and in
the Transmission lines.
Advantages
Due to the corona formation,
the air surrounding the
conductor becomes conducting
and hence the virtual diameter
of the conductor is increased ,
The increased diameter
decreases the electro static
stresses between the
conductors .
Corona reduces the effects of
transients voltages.
Disadvantages
Corona is accomplished by a
loss of energy, This affects the
transmission efficiency of the
line.
Ozone is produced by corona
and may cause corrosion of
the conductor due to chemical
action.
The current drawn by the line
due to corona is non-
sinusoidal and hence non-
sinusoidal voltage drop occurs
in the line ,This may cause
inductive interference with
neighboring communication
lines.
Presenters
Abdallah Saied Rahmy
Ehab Mohamed Attia
Mohamed Ibrahim
Ahmed Abd El-Aziz
Thanks!

More Related Content

What's hot

Effect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmdEffect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmdvishalgohel12195
 
EE8701-High Voltage Engineering (1).pptx
EE8701-High Voltage Engineering (1).pptxEE8701-High Voltage Engineering (1).pptx
EE8701-High Voltage Engineering (1).pptxsai karthick
 
measurement of high voltage and high currents
 measurement of high voltage and high currents  measurement of high voltage and high currents
measurement of high voltage and high currents mukund mukund.m
 
Chapter 2 transmission line parameters
Chapter 2  transmission line parametersChapter 2  transmission line parameters
Chapter 2 transmission line parametersfiraoltemesgen1
 
Ppt of ehv ac transmission
Ppt of ehv ac transmissionPpt of ehv ac transmission
Ppt of ehv ac transmissionSumit Kumar
 
power system transients.pptx
power system transients.pptxpower system transients.pptx
power system transients.pptxsameed4
 
Types of insulator
Types of insulatorTypes of insulator
Types of insulatoradeelshafiq
 
Directional relay & Differential relay.pptx
Directional relay & Differential relay.pptxDirectional relay & Differential relay.pptx
Directional relay & Differential relay.pptxUtthejNani1
 
Disadvantages of corona, radio interference, inductive interference between p...
Disadvantages of corona, radio interference, inductive interference between p...Disadvantages of corona, radio interference, inductive interference between p...
Disadvantages of corona, radio interference, inductive interference between p...vishalgohel12195
 
Measurement of hvac (High Voltage Engineering )
Measurement  of  hvac (High Voltage Engineering )Measurement  of  hvac (High Voltage Engineering )
Measurement of hvac (High Voltage Engineering )Abhishek Choksi
 
Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)Rohini Haridas
 
Chapter 3 Generation of high voltages and current
Chapter 3 Generation of high voltages and currentChapter 3 Generation of high voltages and current
Chapter 3 Generation of high voltages and currentmukund mukund.m
 
Inductance of transmission line
Inductance of transmission lineInductance of transmission line
Inductance of transmission lineAnisur Rahman
 
Lightning Arrester Working Principle & Types
Lightning Arrester Working Principle & TypesLightning Arrester Working Principle & Types
Lightning Arrester Working Principle & TypesPower System Operation
 
Effect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmdEffect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmdvishalgohel12195
 
Conductor material and ferranti effect
Conductor material and ferranti effectConductor material and ferranti effect
Conductor material and ferranti effectAbhishekLalkiya
 

What's hot (20)

Effect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmdEffect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmd
 
EE8701-High Voltage Engineering (1).pptx
EE8701-High Voltage Engineering (1).pptxEE8701-High Voltage Engineering (1).pptx
EE8701-High Voltage Engineering (1).pptx
 
Corona Effect
Corona EffectCorona Effect
Corona Effect
 
measurement of high voltage and high currents
 measurement of high voltage and high currents  measurement of high voltage and high currents
measurement of high voltage and high currents
 
Chapter 2 transmission line parameters
Chapter 2  transmission line parametersChapter 2  transmission line parameters
Chapter 2 transmission line parameters
 
Ppt of ehv ac transmission
Ppt of ehv ac transmissionPpt of ehv ac transmission
Ppt of ehv ac transmission
 
power system transients.pptx
power system transients.pptxpower system transients.pptx
power system transients.pptx
 
Types of insulator
Types of insulatorTypes of insulator
Types of insulator
 
Hvdc notes
Hvdc notesHvdc notes
Hvdc notes
 
chapter-2 Breakdown in Gases (part-1)
chapter-2 Breakdown  in Gases (part-1)chapter-2 Breakdown  in Gases (part-1)
chapter-2 Breakdown in Gases (part-1)
 
Directional relay & Differential relay.pptx
Directional relay & Differential relay.pptxDirectional relay & Differential relay.pptx
Directional relay & Differential relay.pptx
 
Disadvantages of corona, radio interference, inductive interference between p...
Disadvantages of corona, radio interference, inductive interference between p...Disadvantages of corona, radio interference, inductive interference between p...
Disadvantages of corona, radio interference, inductive interference between p...
 
Measurement of hvac (High Voltage Engineering )
Measurement  of  hvac (High Voltage Engineering )Measurement  of  hvac (High Voltage Engineering )
Measurement of hvac (High Voltage Engineering )
 
Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)Protection of transmission lines(encrypted)
Protection of transmission lines(encrypted)
 
Chapter 3 Generation of high voltages and current
Chapter 3 Generation of high voltages and currentChapter 3 Generation of high voltages and current
Chapter 3 Generation of high voltages and current
 
Inductance of transmission line
Inductance of transmission lineInductance of transmission line
Inductance of transmission line
 
Lightning Arrester Working Principle & Types
Lightning Arrester Working Principle & TypesLightning Arrester Working Principle & Types
Lightning Arrester Working Principle & Types
 
Effect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmdEffect of earth on transmission line, bundle conductor & method of gmd
Effect of earth on transmission line, bundle conductor & method of gmd
 
Circuit breaker
Circuit breakerCircuit breaker
Circuit breaker
 
Conductor material and ferranti effect
Conductor material and ferranti effectConductor material and ferranti effect
Conductor material and ferranti effect
 

Viewers also liked

Corona effect, corona ring and any other topics
Corona effect, corona ring and any other topicsCorona effect, corona ring and any other topics
Corona effect, corona ring and any other topicsMithilesh Raj
 
Thermal power plant
Thermal power plant Thermal power plant
Thermal power plant Ankur Mahajan
 
Thermal Power Plant - Manual
Thermal Power Plant - ManualThermal Power Plant - Manual
Thermal Power Plant - ManualSheel Shah
 
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...Shubham Thakur
 
Phase Controlled Rectifiers
Phase Controlled RectifiersPhase Controlled Rectifiers
Phase Controlled Rectifiersmaneesh001
 
Presentation on thermal power plant
Presentation on thermal power plantPresentation on thermal power plant
Presentation on thermal power plantRashmi Nimje
 
Best ppt on thermal power station working
Best ppt on thermal power station workingBest ppt on thermal power station working
Best ppt on thermal power station workingRonak Thakare
 

Viewers also liked (9)

Corona effect, corona ring and any other topics
Corona effect, corona ring and any other topicsCorona effect, corona ring and any other topics
Corona effect, corona ring and any other topics
 
Corona
CoronaCorona
Corona
 
Thermal power plant
Thermal power plant Thermal power plant
Thermal power plant
 
Thermal Power Plant - Manual
Thermal Power Plant - ManualThermal Power Plant - Manual
Thermal Power Plant - Manual
 
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...
 
Phase Controlled Rectifiers
Phase Controlled RectifiersPhase Controlled Rectifiers
Phase Controlled Rectifiers
 
Presentation on thermal power plant
Presentation on thermal power plantPresentation on thermal power plant
Presentation on thermal power plant
 
Thermal power plant
Thermal power plantThermal power plant
Thermal power plant
 
Best ppt on thermal power station working
Best ppt on thermal power station workingBest ppt on thermal power station working
Best ppt on thermal power station working
 

Similar to Corona effect

Corona1 150423103048-conversion-gate02
Corona1 150423103048-conversion-gate02Corona1 150423103048-conversion-gate02
Corona1 150423103048-conversion-gate02GHSKassKoronaMardan
 
Corona Effect: What is Corona | Corona Effect in Transmission Line
Corona Effect: What is Corona | Corona Effect in Transmission LineCorona Effect: What is Corona | Corona Effect in Transmission Line
Corona Effect: What is Corona | Corona Effect in Transmission Linevikasverma433
 
1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx
1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx
1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptxTajmun1
 
Chapter Five Corona and Overhead line Insulators.pptx
Chapter Five Corona and Overhead line Insulators.pptxChapter Five Corona and Overhead line Insulators.pptx
Chapter Five Corona and Overhead line Insulators.pptxssuserc8d444
 
Bundle conductors in transmission line
Bundle conductors in transmission line Bundle conductors in transmission line
Bundle conductors in transmission line chandan kumar
 
Presentation power loss due to corona on high voltage transmission lines
Presentation power loss due to corona on high voltage transmission linesPresentation power loss due to corona on high voltage transmission lines
Presentation power loss due to corona on high voltage transmission linesShahahrier
 
Corona in-power-system
Corona in-power-systemCorona in-power-system
Corona in-power-systemR.n. Patel
 
Modelling and Performance of transmission lines.pptx
Modelling and Performance of transmission lines.pptxModelling and Performance of transmission lines.pptx
Modelling and Performance of transmission lines.pptxkarthik prabhu
 
Transmission Line by YEASIN NEWAJ
Transmission Line by YEASIN NEWAJTransmission Line by YEASIN NEWAJ
Transmission Line by YEASIN NEWAJYeasinNewaj
 
Describe the foration of corona and discus thr factorz which affect corona loss
Describe the foration of corona and discus thr factorz  which affect corona lossDescribe the foration of corona and discus thr factorz  which affect corona loss
Describe the foration of corona and discus thr factorz which affect corona lossEngr Nazeer Jasser
 
Partial Discharge Test - Switchgear
Partial Discharge Test - Switchgear Partial Discharge Test - Switchgear
Partial Discharge Test - Switchgear RajuGupta88
 
Passive device fabrication in Integrated circuits
Passive device fabrication in Integrated circuitsPassive device fabrication in Integrated circuits
Passive device fabrication in Integrated circuitsAbhishek Kadam
 
Transmission & distribution of electrical power
Transmission & distribution of electrical powerTransmission & distribution of electrical power
Transmission & distribution of electrical powerpriyanka1432
 

Similar to Corona effect (20)

corona.pptx
corona.pptxcorona.pptx
corona.pptx
 
Corona in trasmission line
Corona in trasmission lineCorona in trasmission line
Corona in trasmission line
 
Corona1 150423103048-conversion-gate02
Corona1 150423103048-conversion-gate02Corona1 150423103048-conversion-gate02
Corona1 150423103048-conversion-gate02
 
Corona1
Corona1Corona1
Corona1
 
Corona Effect: What is Corona | Corona Effect in Transmission Line
Corona Effect: What is Corona | Corona Effect in Transmission LineCorona Effect: What is Corona | Corona Effect in Transmission Line
Corona Effect: What is Corona | Corona Effect in Transmission Line
 
Corona
CoronaCorona
Corona
 
1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx
1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx
1502957341lectrure_3_KUET [Autosaved] [Autosaved].pptx
 
Chapter Five Corona and Overhead line Insulators.pptx
Chapter Five Corona and Overhead line Insulators.pptxChapter Five Corona and Overhead line Insulators.pptx
Chapter Five Corona and Overhead line Insulators.pptx
 
Corona topic
Corona topicCorona topic
Corona topic
 
Bundle conductors in transmission line
Bundle conductors in transmission line Bundle conductors in transmission line
Bundle conductors in transmission line
 
Corrona Effect.ppt
Corrona Effect.pptCorrona Effect.ppt
Corrona Effect.ppt
 
Presentation power loss due to corona on high voltage transmission lines
Presentation power loss due to corona on high voltage transmission linesPresentation power loss due to corona on high voltage transmission lines
Presentation power loss due to corona on high voltage transmission lines
 
Corona in-power-system
Corona in-power-systemCorona in-power-system
Corona in-power-system
 
O.H.T.L PRESENTATION ATIK
O.H.T.L PRESENTATION ATIKO.H.T.L PRESENTATION ATIK
O.H.T.L PRESENTATION ATIK
 
Modelling and Performance of transmission lines.pptx
Modelling and Performance of transmission lines.pptxModelling and Performance of transmission lines.pptx
Modelling and Performance of transmission lines.pptx
 
Transmission Line by YEASIN NEWAJ
Transmission Line by YEASIN NEWAJTransmission Line by YEASIN NEWAJ
Transmission Line by YEASIN NEWAJ
 
Describe the foration of corona and discus thr factorz which affect corona loss
Describe the foration of corona and discus thr factorz  which affect corona lossDescribe the foration of corona and discus thr factorz  which affect corona loss
Describe the foration of corona and discus thr factorz which affect corona loss
 
Partial Discharge Test - Switchgear
Partial Discharge Test - Switchgear Partial Discharge Test - Switchgear
Partial Discharge Test - Switchgear
 
Passive device fabrication in Integrated circuits
Passive device fabrication in Integrated circuitsPassive device fabrication in Integrated circuits
Passive device fabrication in Integrated circuits
 
Transmission & distribution of electrical power
Transmission & distribution of electrical powerTransmission & distribution of electrical power
Transmission & distribution of electrical power
 

Recently uploaded

Power System electrical and electronics .pptx
Power System electrical and electronics .pptxPower System electrical and electronics .pptx
Power System electrical and electronics .pptxMUKULKUMAR210
 
A Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software SimulationA Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software SimulationMohsinKhanA
 
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....santhyamuthu1
 
Design of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptxDesign of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptxYogeshKumarKJMIT
 
sdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdf
sdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdfsdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdf
sdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdfJulia Kaye
 
EPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptxEPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptxJoseeMusabyimana
 
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxVertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxLMW Machine Tool Division
 
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratoryدليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide LaboratoryBahzad5
 
Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...sahb78428
 
Basic Principle of Electrochemical Sensor
Basic Principle of  Electrochemical SensorBasic Principle of  Electrochemical Sensor
Basic Principle of Electrochemical SensorTanvir Moin
 
Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...soginsider
 
ASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderjuancarlos286641
 
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS Bahzad5
 
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...amrabdallah9
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Projectreemakb03
 
nvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptxnvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptxjasonsedano2
 
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfSummer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfNaveenVerma126
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Apollo Techno Industries Pvt Ltd
 

Recently uploaded (20)

Power System electrical and electronics .pptx
Power System electrical and electronics .pptxPower System electrical and electronics .pptx
Power System electrical and electronics .pptx
 
A Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software SimulationA Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software Simulation
 
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
 
Design of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptxDesign of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptx
 
Lecture 4 .pdf
Lecture 4                              .pdfLecture 4                              .pdf
Lecture 4 .pdf
 
sdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdf
sdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdfsdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdf
sdfsadopkjpiosufoiasdoifjasldkjfl a asldkjflaskdjflkjsdsdf
 
EPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptxEPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptx
 
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxVertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
 
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratoryدليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
 
Présentation IIRB 2024 Marine Cordonnier.pdf
Présentation IIRB 2024 Marine Cordonnier.pdfPrésentation IIRB 2024 Marine Cordonnier.pdf
Présentation IIRB 2024 Marine Cordonnier.pdf
 
Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...
 
Basic Principle of Electrochemical Sensor
Basic Principle of  Electrochemical SensorBasic Principle of  Electrochemical Sensor
Basic Principle of Electrochemical Sensor
 
Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...
 
ASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entender
 
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS
 
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Project
 
nvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptxnvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptx
 
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfSummer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
 

Corona effect

  • 1. Corona Effect in transmission lines Presented to Dr. Amlak
  • 2.  What is Corona Discharge? • Corona discharge is a process by which a current flows in a conductor with a high potential into a neutral fluid, usually air, by ionizing that fluid so as to create a region of plasma around the Conductor. • The ions generated pass charge to nearby areas of lower potential, or recombine to form neutral gas molecules. • When the potential (electric field) is large enough (33 KV =disruptive potential gradient) the air ionizes HV
  • 3. • the ionized region continues to grow until it reaches another conductor at a lower potential, a low resistance conductive path between the two will be formed, resulting in an electric arc, then a faint luminous glow of violet color appears together along with hissing noise. This phenomenon is called corona. Welding Circuit breaker arc real video
  • 4.  Which factors affect Corona? Conductor: Corona Effect is considerably affected by the shape, size and surface conditions of the conductor. Corona Effect decreases with increases in the size of the conductor, this effect is less for the conductors having round conductors compared to flat conductors.  Line Voltage: Corona Discharge effect is not present when the applied line voltages are less. When the Voltage of the system increases corona Effect will be more.  Atmosphere: Breakdown voltage directly proportional to the density of the atmosphere present in between the power conductors. In a stormy weather the ions present around the conductor is higher than normal weather condition.  Spacing between the Conductors: Electro static stresses are reduced with increase in the spacing between the conductors. Corona Discharge Effect takes place at much higher voltage when the distance between the power conductors increases.
  • 5.  How to reduce Corona ?  By increasing the spacing between the conductors: Corona Discharge Effect can be reduced by increasing the clearance spacing between the phases of the transmission lines. However increase in the phases results in heavier metal supports. Cost and Space requirement increases.  By increasing the diameter of the conductor: Diameter of the conductor can be increased to reduce the corona discharge effect. By using hollow conductors corona discharge effect can be improved.  By using Bundled Conductors: By using Bundled Conductors also corona effect can be reduced this is because bundled conductors will have much higher effective diameter compared to the normal conductors.  By Using Corona Rings or Grading Rings: Corona Rings or Grading Rings are present on the surge arresters to equally distribute the potential along the Surge Arresters or Lightning Arresters which are present near the Substation and in the Transmission lines.
  • 6. Advantages Due to the corona formation, the air surrounding the conductor becomes conducting and hence the virtual diameter of the conductor is increased , The increased diameter decreases the electro static stresses between the conductors . Corona reduces the effects of transients voltages. Disadvantages Corona is accomplished by a loss of energy, This affects the transmission efficiency of the line. Ozone is produced by corona and may cause corrosion of the conductor due to chemical action. The current drawn by the line due to corona is non- sinusoidal and hence non- sinusoidal voltage drop occurs in the line ,This may cause inductive interference with neighboring communication lines.
  • 7. Presenters Abdallah Saied Rahmy Ehab Mohamed Attia Mohamed Ibrahim Ahmed Abd El-Aziz Thanks!