Layout & understanding of Feeding Post |Sectioning & Sub Sectioning Post| |Elementary Post|
Summary
TLDRThis video lecture delves into the intricacies of a feeding post in a traction power supply system. It explains the setup of overhead catenary systems and the role of substations in providing power. The lecture covers various components like feeding posts, sectioning posts, and parallel posts, emphasizing their importance in maintaining a balanced power supply. It also discusses the use of neutral sections to prevent unbalanced loads and the role of elementary sections in isolating faults for maintenance. The video concludes with insights on auxiliary equipment used for remote control and protection.
Takeaways
- 🚋 The video lecture discusses the components of a traction power supply system, specifically focusing on the feeding post, substation, and various types of posts used in railway electrification.
- 🔌 Feeding posts are crucial as they receive power from the substation and distribute it to the overhead catenary system for train traction.
- 🏭 Substations are the primary source of power, supplying 25 kV feeders to the feeding posts, which are typically located about two kilometers away.
- 🔄 The feeding post layout includes two incoming 25 kV feeders, each with two conductors for connection to the bus bar and track for return current.
- 🛠️ Remote control is commonly used for feeding posts, which are equipped with circuit breakers and bus couplers to connect the bus bars.
- 🚆 To maintain balance, adjacent substations are fed with different phases, and a neutral section is provided between them to allow trains to change phases.
- 🔄 Sectioning and parallel posts are used for emergency supply in case of interruptions in the incoming 25 kV feeders.
- 🛑 Elementary sections are created to ensure rapid isolation of overhead equipment and maintenance work, with a distance of 10 to 15 kilometers between them.
- ⚡ Auxiliary equipment at control posts includes lightning arresters, auxiliary transformers, potential transformers, and circuitry for remote control and monitoring.
- 🔋 Battery and battery charging equipment are essential for the operation of remote control equipment at the posts.
- 🛂 Insulated overlapped bridges with isolators are used to separate nearby elementary sections, and these sections are manually operated on no load.
Q & A
What is the primary purpose of a feeding post in an overhead catenary system?
-The primary purpose of a feeding post is to supply power from the substation to the overhead catenary system at a certain distance, ensuring the power supply for traction.
How far is a typical feeding post located from the substation?
-A typical feeding post is normally capped at two kilometers away from the substation.
What are the two main components that come from the substation to the feeder post?
-The two main components are the two incoming 25 kV feeders, each with a two-conductor system for connection to the bus bar and the track.
What is the role of interrupters in the feeding post?
-Interrupters are used in the feeding post as circuit breakers without protective relays to manage the flow of power in the system.
Why are two adjacent substations fed with different phases?
-Feeding two adjacent substations with different phases helps to avoid a highly unbalanced load on the traction system, which could be the case if the entire load was connected to a single phase.
What is the function of a neutral section in the traction power supply?
-A neutral section is provided between substations to allow the locomotive to cross without power, using its own momentum, and to ensure that different phases are used for feeding different substations.
What is the purpose of sectioning and parallel posts in the power supply arrangement?
-Sectioning and parallel posts are provided for emergency supply in case of any interruption in the incoming 25 kV feeder, ensuring continuity of power supply.
Why is the elementary section necessary in the power supply system?
-The elementary section is necessary to subdivide the subsection into smaller segments, allowing for rapid isolation of overhead equipment in case of faults and facilitating maintenance work.
How are nearby elementary sections separated in the system?
-Nearby elementary sections are separated by insulated overlapped bridges using isolators, and this section is manually operated on no load.
What auxiliary equipment is typically found at a control post?
-Auxiliary equipment at a control post includes lightning arresters for protection against switching surges, auxiliary transformers for supplying remote connected equipment, potential transformers for indication, and circuitry for providing information to the remote control center.
Outlines
🚋 Overview of Traction Power Supply System
The video lecture introduces the components of a traction power supply system, focusing on the feeding post. It discusses the necessity of feeding posts to transfer power from the substation to the overhead catenary system, especially when there's a distance between them. The lecture explains the typical layout of a feeding post, which includes two 25 kV feeders from the substation, each with two conductors for bus bar and track connection. It also covers the remote control aspect of feeding posts, typically located about two kilometers from the substation. The importance of circuit breakers and bus couplers in connecting bus bars is highlighted. The video also touches on the need for balancing the load by feeding adjacent substations with different phases and the use of neutral sections. Additionally, it mentions the role of sectioning and parallel posts for emergency power supply and the concept of elementary sections for rapid isolation and maintenance.
🔌 Detailed Explanation of Feeding and Sectioning Posts
This paragraph delves deeper into the specifics of feeding posts, sectioning posts, and their auxiliary equipment. It explains the purpose of keeping an elementary section distance of 10 to 15 kilometers for rapid isolation of overhead equipment and maintenance. The paragraph also describes the manual operation of these sections and the use of insulated overlapped bridges with isolators to separate nearby elementary sections. Auxiliary equipment such as lightning arresters, auxiliary transformers, potential transformers, and remote control circuitry for supply condition monitoring are discussed. The necessity of battery and battery charging equipment for the operation of remote control equipment is also mentioned. The paragraph concludes with a summary of the functions of interrupters at each post, emphasizing their role in the traction power supply system.
Mindmap
Keywords
💡Overhead Catenary System
💡Substation
💡Feeding Post
💡Sectioning Post
💡Subsectioning Post
💡Parallel Post
💡Neutral Section
💡Interrupters
💡Elementary Section
💡Auxiliary Equipment
💡Remote Control
Highlights
Introduction to the study of feeding post in overhead quaternary systems and substations.
Explanation of the necessity for feeding posts due to the distance between overhead catenary and substation.
Description of the typical layout of a feeding post, including its location and remote control capabilities.
Details on the two incoming 25 kV feeders from the substation and their conductors.
Role of input and output side circuit breakers and bus couplers in connecting bus bars.
Use of four interrupters for double track systems and their function.
Importance of feeding and sectioning arrangements in power supply systems.
Discussion on the generation and transmission of high voltage lines and the need for single phase power for traction duty.
Strategies to avoid load unbalance by feeding adjacent substations with different phases.
Function and placement of neutral sections between substations.
Operation of locomotives during the crossing of neutral sections and the concept of dead zones.
Purpose and setup of suctioning and parallel posts for emergency power supply.
Explanation of elementary sections and their role in fault isolation and maintenance.
Procedure for subdividing subsections into elementary sections for rapid isolation.
Manual operation of elementary sections and the use of insulated overlapped bridges.
Auxiliary equipment on control posts, including lightning arresters and auxiliary transformers.
Role of potential transformers and circuitry in providing supply condition information to remote control centers.
Use of batteries and battery charging equipment for the operation of remote control equipment.
Presence of interrupters at each post and their significance.
Conclusion and a call to action for viewers to continue watching for more information.
Transcripts
[Music]
hello everyone
i welcome you all in this video lecture
in today's video lecture we will study
about a feeding
post we have
overhead quaternary system and we have
substation
there might be certain distance between
overhead catenary
and substation so to fit the power
to the overhead catenary system
we require feeding post at certain
distance
from the substation power supply system
for traction has mainly following
components
substation feeding post
sectioning post sub sectioning
and parallel post subsection
post elementary section
we'll discuss some of sections briefly
let's start with the feeding post
two incoming 25 kv feeder
coming from substation to the feeder
post and
each feeder has a two conductor
one for connection to the bus bar
another to the track
for written current
we can see the typical layout
of the feeding post which is normally
capped
at two kilometer away from the
substation
and mostly it is a remote control
we can see 25 kv 2 incoming feeder
and it has a 2 set of bus bar
so with the help of input and output
side
circuit breakers and bus couplers
bus bars are connected together
four interrupters are used in case of
double track we have we can see that we
have double tracked
one for upside and one for downside
so we use four different interrupters
interrupters are nothing but a circuit
breaker
but without a protective relays
then we have feeding and sectioning
arrangement
we know that generation and transmission
of
a high voltage line that is
either 220 kv or 132 kv
but that is uh in three phase
we require a single phase power
for the traction duty now if we connect
entire traction load to any
single phase then there will be highly
unbalanced of the load
so to avoid this unbalance
two adjacent substations are fed with
the different phases a neutral section
is provided
in between the substation here we can
see that
we have different phase ryb
is used to fed different substations
we have up and down overhead catenary
system
in between the substation we have
neutral section when
our locomotive cross this neutral system
they cut off the power and
during this dead zone train moves
on its own momentum
then suctioning and parallel post
power supply arrangement for up and down
track
in between feeding post and a neutral
section
an additional sectioning and parallel
post
and one or more sub sectioning and
parallel post
are provided the purpose
of this sectioning and parallel post
that is for the emergency supply
in case if we have any interruption
in the incoming 25 kv feeder
then elementary section when fault
occurs
the distance between two subsection and
parallel post
kept 10 to 15 kilometer is also
seems too long with a view to ensure
rapid isolation
of overhead equipment and maintenance
work
it is again required to subdivide
subsection into elementary section
two nearby elementary section are
separated by
insulated overlapped bridge by
isolators
this section is manually operated
on no load
we have certain auxiliary equipment on
control post
like a lightning aerospace
to protect against the switching search
auxiliary transformers
to supply remote connected equipments
potential transformer indication
circuitry
for giving information to remote control
center
regarding condition of supply to each
section
battery and battery charging equipment
for operation of remote control
equipment
interrupters at each post
so this is all about feeding post and
sectioning and subsection cost
thank you for watching my video keep
watching
thank you very much
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