Here we deal with the protection & control principles of high voltage stations. HV Bus Differential Protection is studied along with restrictions due to CT saturation & mis-match and its solution, “Restraint Differential Protection”.
Starting with System Faults and how they affect Switchyard Configuration & Elements simple “Differential Protection” is examined along with the mal-operation due to CT saturation and mis-match.
Here we deal with the protection & control principles of high voltage stations. HV Bus Differential Protection is studied along with restrictions due to CT saturation & mis-match and its solution, “Restraint Differential Protection”.
Starting with System Faults and how they affect Switchyard Configuration & Elements simple “Differential Protection” is examined along with the mal-operation due to CT saturation and mis-match.
High Voltage Circuit Breakers are examined as to the various Types (Oil, Vacuum, Air Blast, SF6), their Controls (Closing/Tripping/anti-pumping) Reclosure Syncrocheck relay CUH 90 – VG as well as Breakers Failure Protection is part of this module along with a quick look at Dynamic Monitoring Equipment. Transfer & remote tripping along with the need to provide immunity from ground rise potential and open circuit situations.
Here you will find a good review of what is in this section.
The various types and configuration of utility and industrial power facilities are examined here.
In this lecture you will find, protection schemes, zones of protection, types of electrical faults, the ANSI (American National Standards Institute) standard device numbering system and other common relay terminology.
Current and voltage transformers are examined in this lecture.
Here Power Transformers are looked at from the perspective of configurations connections & cooling.
Various surge protective devices are looked at here.
The main types of circuit breakers are looked at here: Oil Breakers; Air Blast Breakers; Vacuum Breakers; SF6 Breakers
Breaker controlled tripping & closing; the trip free function; anti-pump are examined in this lecture along with the auto-reclose feature.The SEL-751 and the BBC CUH-90 relays are compared.
Instantaneous & Timed Over Current Protection is studied using GE & Westinghouse mechanical relays as examples comparing them to the SEL-351 Distribution and Transmission Relay.
this is one of the most effective and common forms of protection used for almost every element of the power system.
The Impedance or Distance relays are mainly used for line protection. Permissive Overreach Transfer Trip (POTT) and Directional Comparison Protection schemes are looked at using the Westinghouse KD relay in comparison to the GE D60 (Multilin™) Line Distance Protection System.
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