Layout & understanding of Feeding Post |Sectioning & Sub Sectioning Post| |Elementary Post|

Anish Vora

12 Jul 202106:37

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

00:00

🚋 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.

05:00

🔌 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

The overhead catenary system is an electrical system used for power transmission to trains, particularly in electrified railways. It consists of a series of metal wires suspended above the tracks, which supply power to the train's pantograph. In the video, it is mentioned that there is a certain distance between the overhead catenary and the substation, necessitating the use of feeding posts to supply power to the catenary system effectively.

💡Substation

A substation is a part of an electrical generation, transmission, and distribution system. It transforms voltage from high to low levels or vice versa and is essential for managing the power flow in a network. In the context of the video, the substation is where the high voltage is stepped down to a level suitable for the overhead catenary system, and it is connected to the feeding post via a 25 kV feeder.

💡Feeding Post

A feeding post is a structure in an electrical system that serves as a connection point between the substation and the overhead catenary system. It is equipped with circuit breakers and bus couplers to manage the flow of power. The video describes that the feeding post is typically located about two kilometers away from the substation and is operated remotely, with two incoming 25 kV feeders providing power to the catenary system.

💡Sectioning Post

A sectioning post is a component in the power supply system that allows for the division of the electrical network into sections. This is crucial for isolating faults and maintaining the integrity of the power supply. The video explains that sectioning posts are used to divide the power supply into manageable sections, which can be isolated in case of a fault or for maintenance.

💡Subsectioning Post

Subsectioning posts are used to further divide the power supply into smaller sections than those created by sectioning posts. This allows for even more localized control and isolation of faults. The video mentions that subsectioning posts are used to create smaller sections of the power supply, which can be particularly useful for rapid isolation and maintenance work.

💡Parallel Post

A parallel post is a part of the power supply system that allows for the paralleling of two or more power sources. This can be used for redundancy or to increase the capacity of the power supply. In the video, parallel posts are discussed in the context of providing emergency power supply in case of interruptions in the incoming 25 kV feeder.

💡Neutral Section

A neutral section is a part of the power supply system where the electrical phases are isolated from each other. This is used to balance the load and prevent unbalanced loading on the power system. The video describes how neutral sections are provided between substations to ensure that adjacent substations are fed with different phases to avoid load imbalance.

💡Interrupters

Interrupters are circuit breakers without protective relays used to interrupt the flow of current in a circuit. They are essential for safety and control in electrical systems. The video explains that four interrupters are used in a double-track system, one for each track, to manage the power flow and ensure safety.

💡Elementary Section

An elementary section is the smallest division of the power supply system, created to ensure rapid isolation of faults and to facilitate maintenance work. The video mentions that the distance between two elementary sections is kept at 10 to 15 kilometers to ensure quick response to faults while maintaining the operational efficiency of the system.

💡Auxiliary Equipment

Auxiliary equipment refers to the additional devices and systems that support the main power supply system. These can include lightning arresters, auxiliary transformers, and potential transformers. In the video, auxiliary equipment is discussed as being part of the control post, providing protection and information to the remote control center about the condition of the power supply.

💡Remote Control

Remote control in the context of the video refers to the ability to operate and manage the power supply system from a distance. This is crucial for the efficient operation and safety of the system, allowing operators to control the system without being physically present at the feeding or sectioning posts. The video highlights that the feeding post is typically operated remotely.

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.