Fundamentals of Modern Substation Equipment, Protection and Controls

By the end of this course, you will be able to:

• Evaluate and select substation equipment and protection schemes based on system requirements, operational constraints, and reliability objectives
• Apply structured approaches to the design, coordination, and performance assessment of substation protection and control systems
• Interpret single-line diagrams and control schematics to support accurate analysis, troubleshooting, and decision-making
• Assess grounding, power conditioning, and equipment configurations to improve system safety and operational performance
• Identify and address risks associated with equipment selection, protection coordination, and substation operation

Description

Substations play a critical role in the reliability and safety of electrical power systems, but equipment selection, protection coordination, and system configuration decisions are often made under complex technical and operational constraints. Inadequate understanding of how equipment and protection systems interact can lead to miscoordination, reduced system reliability, and increased risk to both infrastructure and personnel.

This course provides a structured, practical foundation for evaluating and applying modern substation equipment, protection schemes, and control systems in real-world environments. Rather than focusing on isolated components, the course emphasizes how equipment, protection, grounding, and control strategies work together to support safe and reliable system performance.

Through applied examples and engineering-focused discussion, participants will strengthen their ability to make informed decisions related to substation design, operation, and maintenance. The course equips you with practical approaches that can be applied directly to improve system reliability, mitigate risk, and support effective substation performance in your professional practice.

Who This Course Is For

This course is designed for:

• Electrical engineers involved in the design, analysis, or operation of substations
• Engineers and technologists working in industrial, utility, or power distribution environments
• Engineering professionals responsible for protection systems, equipment selection, or system performance
• Project engineers, consultants, and technical specialists involved in substation projects
• Early-career to senior practitioners seeking to strengthen practical substation knowledge and decision-making capability

Introduction to Electrical Power Distribution Systems

• Canadian Electrical Code
• Voltage classifications
• Fundamentals of electrical power distribution system operation

Introduction to Electrical Drawings

• Standards for electrical controls, international context
• Standard electrical symbols
• Single line diagrams
• Schematic and wiring diagrams

Grounding and Bonding of Electrical Equipment

• Equipment Grounding – Bonding
• Source and distribution of ground currents
• Grounding Electrodes
• Substation grounding and concepts for safety

LV and MV System Grounding

• System Grounding options
• Arc Flash hazard
• detection and locating ground faults
• Grounding in multiple source systems

Modern Substation Types and Purposes

• Fundamentals of electrical substation operation
• Primary unit substations
• Secondary unit substations
• Substation circuit arrangement

Power Transformers and Controls

• Major components
• Construction and operation
• Connections and ratings
• Fixed taps and LTCs

Bus and Disconnect Switches

• Types and applications
• Manual and motor-operated switches; control schematics

Power Circuit Breakers

• Purpose and types
• Construction and operation
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Metal-Clad Switchgear

• Advantages and applications
• Construction and operation
• Protection and control

Power Supply Systems

• Battery systems
• Purpose and ratings
• Chargers and charging control systems
• Station power requirements
• Back-up supplies/sources
• Source transfer control schemes

Power Conditioning Systems

• Classification of equipment requiring power conditioning
• Standby versus uninterruptible power
• Categories of power conditioners
• Review of power conditioner types

Power Capacitor and Capacitor Banks

• Principles of power capacitor application
• Power capacitor construction and operation
• Capacitor bank construction and operation
• Switching and protection control schemes

Substation Commissioning

• Acceptance testing equipment
• Start-up procedures
• Energizing equipment

Case Study Commissioning of 27 KV Switchgear

Fundamentals of Power System Protective Relaying Systems

• Power system faults
• Requirements of protective relaying systems
• Detection and clearance of power System faults
• Basic fault calculations
• Components of protection systems
• Relay types: electromechanical, electronic and microprocessor-based relays

Instrument Transformers

• Voltage transformers and current transformers
• Theory of operation
• Burden, saturation, and accuracy
• Application and selection
• Testing of CTs and VTs

Coordination of Protection Systems

• Time-current coordination
• Protective relaying zones
• Backup protection on radial systems
• Breaker failure protection on interconnected systems
• Auto-reclosing of circuit breakers

Protective Relaying Systems

• Feeder overcurrent protection
• Bus protection – a fundamental principle of differential protection
• Transformer protection

Discussion of Problem Set Given as in Class Assignment

Questions and Answers and Feedback to Participants on Achievement of Learning Outcomes