Substation Design Course

Lesson 1 • Electric Power System Overview

Covers generation, transmission, and distribution hierarchy and how substations fit within each tier. Establishes the system context needed for all subsequent design decisions.

Lesson 2 • Substation Types and Classifications

Distinguishes transmission, distribution, converter, and switching substations by function and voltage class. Provides the classification framework used throughout the course.

Lesson 3 • Key Electrical Quantities and Units

Reviews voltage, current, power, impedance, and per-unit notation essential for substation calculations. Connects fundamental theory to practical equipment ratings.

Lesson 1 • Power Transformers

Covers transformer construction, ratings, cooling methods, and tap-changer operation. Connects transformer selection to voltage transformation and load requirements.

Lesson 2 • Instrument Transformers and Metering

Explains current and voltage transformer accuracy classes, burdens, and connection methods. Ties instrument transformer selection to protection and metering accuracy.

Lesson 3 • Switching and Interrupting Equipment

Examines circuit breakers, disconnectors, and load-break switches by interrupting medium and application. Links equipment selection to fault-clearing and operational flexibility.

Lesson 4 • Surge Arresters and Overvoltage Protection

Covers metal-oxide arrester ratings, placement, and coordination with insulation levels. Establishes overvoltage protection principles used in insulation coordination later.

Lesson 1 • Double Bus and Transfer Bus Schemes

Examines double bus with bus coupler and transfer bus arrangements for improved flexibility. Connects these schemes to maintenance and operational continuity requirements.

Lesson 2 • Ring Bus and Breaker-and-a-Half Schemes

Covers high-reliability configurations used at transmission voltage levels and their switching flexibility. Links scheme selection to N-1 contingency and maintenance requirements.

Lesson 3 • Single Bus and Bus-Section Arrangements

Introduces the simplest bus topology and its sectioned variant, covering reliability limitations. Provides the baseline configuration against which more complex schemes are compared.

Lesson 1 • Surge Arrester Selection and Coordination

Applies protective margin methodology to select arrester ratings and verify coordination with equipment BIL. Directly supports the insulation schedule deliverable.

Lesson 2 • Insulation Levels and Withstand Criteria

Defines BIL, BSL, and power-frequency withstand voltage and their relationship to equipment ratings. Provides the withstand criteria framework for coordination calculations.

Lesson 3 • Overvoltage Sources and Characteristics

Identifies lightning, switching, and temporary overvoltages and their waveform characteristics. Establishes the threat environment that insulation coordination must address.

Lesson 1 • Grounding Fundamentals and Safety Criteria

Defines ground potential rise, touch voltage, and step voltage and their physiological limits. Establishes the safety criteria that drive all grounding design decisions.

Lesson 2 • Soil Resistivity Measurement and Modeling

Covers Wenner four-pin and other field measurement methods and two-layer soil modeling. Accurate soil data is the primary input to grid resistance and voltage calculations.

Lesson 3 • Equipment Bonding and Special Considerations

Addresses bonding of structures, fences, cable sheaths, and transferred voltage hazards. Ensures the complete grounding system protects personnel and equipment.

Lesson 1 • Control Schemes and Interlocking

Designs breaker control circuits, position indication, and mechanical and electrical interlocks. Ensures safe switching sequences and correct equipment state representation.

Lesson 2 • Differential Protection Schemes

Applies percentage differential principles to transformer, bus, and line protection. Differential protection is the primary scheme for high-value equipment in the substation.

Lesson 3 • Overcurrent and Distance Protection

Covers time-overcurrent coordination, directional elements, and distance relay characteristics for lines. Provides the most widely applied protection techniques in distribution and transmission.

Lesson 4 • Protection Philosophy and System Architecture

Establishes primary and backup protection zones, redundancy requirements, and relay system architecture. Frames the design philosophy applied in all subsequent protection sections.

Lesson 1 • Teleprotection and Communication Channels

Covers pilot protection schemes, permissive and blocking logic, and communication channel requirements. Links communication channel performance to protection speed and reliability.

Lesson 2 • IEC 61850 Standard and Logical Nodes

Introduces the IEC 61850 object model, logical nodes, and GOOSE messaging for substation automation. Enables interoperable IED integration without proprietary protocols.

Lesson 3 • Substation Automation and Bay Control

Designs bay controller functions, interlocking via GOOSE, and automatic switching sequences. Advances the substation toward reduced manual intervention and faster restoration.

Lesson 1 • Cable and Conduit System Design

Covers power, control, and fiber cable routing, sizing, and segregation within the substation. Ensures signal integrity, fault isolation, and maintainability of the cable system.

Lesson 2 • Design Drawing Package and Documentation

Defines the complete set of design drawings, specifications, and calculations required for construction. Establishes documentation standards that support construction, testing, and operation.

Lesson 3 • Civil and Structural Design Coordination

Aligns electrical layout with civil grading, drainage, foundations, and structural steel requirements. Prevents costly rework by resolving interdiscipline conflicts early in design.

Lesson 4 • Commissioning and Energization Planning

Sequences commissioning activities, energization steps, and initial load transfer for a new substation. Ensures safe and systematic transition from construction to operational service.