Competency in Substation Design draft

Program Overview

This comprehensive 5-day program equips participants with the skills to design and protect electrical substations. Covering earthing systems, lightning protection, and protection schemes, the program empowers engineers to ensure safety and reliability in power system networks.

Program Outline

Degree Overview:

• Overview: Substations are crucial components of any power system, serving as vital nodes in transmission and distribution networks.
The Competency in Substation Design (Control, Protection and Facility Planning) program provides comprehensive knowledge and skills in substation design.
• Objectives: Upon completion of this program, participants will be able to:
• Design substation earthing systems to ensure the safety of personnel and equipment under all conditions.
• Design appropriate protection against direct and indirect effects of lightning strikes on substations and incoming/outgoing overhead lines.
• Determine auxiliary power requirements and perform sizing calculations for battery backup of essential DC power supply.
• Duration: 5 Days

Outline:

• Module 1: Earthing System of Switchyards
• Basics of functional and protective earthing
• Touch and step voltages in substations
• Design of earth grid - basic considerations in conductor sizing and mesh spacing
• Role of gravel layer in safety
• Transferred voltage hazards and planning isolation of outgoing services to avoid transfer voltage
• Module 2: Example of Switchyard Earthing System Design
• Based on the layout and data of a given HV switchyard:
• Perform earthing calculations including sizing of earthing conductors
• Calculate the earth mesh size for the switchyard
• Develop a layout for the mesh and show the other connections required to avoid transferred voltages
• Show the size of safety mesh to be provided and the operating points on the layout
• Draw up the installation specification for the earthing system
• Module 3: Lightning Protection of Switchyards
• Basics of lightning and hazards
• Role of shield wire and lightning masts
• Typical configurations of lightning protection of switchyards
• Analysis of hazard using cone of protection and rolling sphere methods
• Selection of lightning arrestors - Types, class and ratings
• Module 4: Example of Switchyard Lightning and Surge Protection Design
• Design the lightning protection of a typical HV switchyard based on a given layout and analyze the adequacy of protection
• Locate and select surge protection (lightning arrestors) of the above HV switchyard
• Brief overview of protection
• Over current protection
• Protection relays
• IEDs and communication options
• Protection coordination