This 3 day seminar is specifically designed to provide a comprehensive understanding of the principles of Power System Protection design. We have integrated the material from the legacy seminars “Fundamentals of Power System Protection” and “Protection of HV & EHV Power Systems”.
This is a generic seminar not focused on any particular protection relay manufacturer, product or product type.
Via a progressive “building block” approach, discussions will take attendees from an understanding of the elementary concepts and fundamental principles of Power System Protection through to an in-depth and comprehensive understanding of Electrical Distribution and Transmission System Protection Schemes and Philosophies.
Thus, this seminar is specifically designed to meet the learning requirements of engineers and technicians who presently perhaps have only a limited knowledge of power system protection principles. And yet, via the progressive ”building block” approach, by considering more advanced topics, discussions will provide a valuable insight for those more experienced in the discipline of power system protection design.
Hence, this seminar will assist both engineers and technicians whose day to day work involves them directly in the application of protection design, coordination and relay setting, together with those power system professionals whose focus is more related to “non-protection” associated areas of electrical power system design.
This 3-day seminar focuses on the implementation of unit and non-unit protection schemes to electrical distribution and transmission systems. Delegates will learn the principles of protection scheme selection, scheme configuration and the principles associated with the determination of relay settings. The difficulties associated with unique system configurations, such as mutually coupled and/or teed feeders, will also be explored.
Protection of Electricity Distribution and Transmission Systems is necessary to maximise safety for the public and electricity industry employees alike, to disconnect faulted plant from the system and to maintain quality of supply to customers. The modern trend is:
- To operate electricity distribution and transmission systems closer and closer to their limits of performance
- Augmentation of the power system is often delayed whereby aging plant continues to service customers
- Value engineered solutions are often implemented, to achieve the most cost effective provision of electricity supply to network participants.
Under these situations, the associated protection systems are required to meet the crucial requirements of being simultaneously coordinated, fast operating, secure and reliable. These requirements tend to be mutually exclusive, yet meeting them is fundamental to the National Electricity Rules (NER), which mandate the performance of protection systems to maintain power system stability and to not restrain power flows within the transmission system network.
This seminar has been prepared specifically to provide this crucial knowledge for:
- Planning Engineers to identify the protection implications associated with proposed schemes for augmentation of the power system.
- Maintenance Engineers to ensure that system protection is not compromised as plant is removed from service during maintenance.
- Circuitry and Automation Design Engineers to implement protection schemes which optimise power system performance.
- Protection Application Engineers to identify protection implications and to ensure design and setting principles meet the NER and provide the necessary levels of speed, security, reliability and safety.
Seminar Content
- Fundamentals of Power System Protection
The “ART” of Protection, Dependability and Security, Zones and Overlapping, Unit Protection Scheme Principles, Non-Unit Protection Scheme Principles, Redundance and Duplication, CB Fail and Blind Spot Protection - Fault Studies and Sequence Components
Introduction to Fault Analysis, Per Unit Methodology, Sequence Components, Three Phase faults, Phase – Phase Faults, Single Phase Faults, Resistive Earth Faults, Transformers and Sequence Networks - Voltage and Current Transformers
Magnetic and Capacitor VT Performance, P Class Current Transformer Specification, PX Class Current Transformer Specification, Transient Performance of CTs - Over Current and Earth Fault Protection
Time & Current Discrimination, Relay Characteristics to IEC60255, Coordination Procedures and Grading Margins, Directional Relays, Earth Fault Protection - Introduction to Distance Protection
Distance Zones, Time and Reach Coordination, Zones of Protection – Circles and Quadrilaterals, Polarizing for Close-In Faults, Three Phase Load Limit Performance, Comparator Configurations for : 3 Phase and Phase-Phase Faults, Earth Faults with Ko compensation - Distance Relay Protection Signalling
Permissive Under Reach Transfer Tripping, Permissive Over Reach Transfer Tripping, Blocking Intertripping, DEF Intertripping, Direct and Series Intertripping, PLC systems - Advanced Applications of Distance Protection
Mutual Coupling Considerations, Teed Feeder Considerations, Zone 3 Back-up Considerations, Fault Resistance, VT Supervision, Polarizing for Close-in Faults and SOTF Logic, Power Swing Blocking - Feeder Digital Current Differential Protection
Pilot Wire Protection Scheme Considerations, Microprocessor Relay Considerations, Data Synchronisation, Biased Differential Systems, Alpha Plane Systems, 2, 3 and Multi Ended Systems, Back-Up Distance Relay Functionality - High Impedance Differential Protection
HZ Differential Protection Setting Principles, Application of Stabilising Resistors, HZ Scheme Secondary System Voltages, Primary Operating Current, Bus Zone Protection Check Systems, Applications for other Galvanically (Electrically) Connected Plant - Transformer Protection
Bias Differential Basic Principles, Stability under Magnetising Inrush Conditions, Stability under Over Excitation Conditions, Stability with Transformer Phase Shifts, Stability under Zero Sequence Current Events, Delta / Star Transformer Example, Determination of CT Ratios, Micro Processor Relay Implications, Application with Zig-Zag Earthing Transformers, Neutral Voltage Displacement Protection - Low Impedance Busbar Differential Protection
Central and Bay Unit Designs, Multiple Zone Applications, Allowance for Dynamic Switching of Plant, CB Fail and CB Fail Bus Trip Facilities, Multi Functionality
And, to supplement this topic, there are our other seminars:
