6T-Protection and Control of High Voltage Power Circuits

Overview

Credit: 6 technical hours

Protection and Controls (P&C) involves electrical power systems that deal with the protection of electric power systems for power generation, transmission, and distribution. This P&C course addresses the art of protecting the power grid against abnormal power system conditions while at the same time initiating certain corrective actions.

In this course, we explain the protection and control principles of high voltage stations HV Bus Differential Protection is studied, along with restrictions due to CT saturation and mismatch, and the applicable 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 mismatch. 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 course along with a quick look at dynamic monitoring equipment. Transfer and remote tripping along with the need to provide immunity from ground rise potential and open-circuit.

Specific Knowledge or Skill Obtained

∙ This course teaches the following specific knowledge and skills:

∙ Switchyard Configuration and Elements

∙ The DESN Station (Dual Element Spot Network)

∙ CT Saturation & Restraint Differential Protection

∙ The Westinghouse KD - 4 Relay

∙ Surge Protective Devices

∙ The Modern IED Relays (Intelligent Electronic Device)

∙ HV Circuit Breaker Controls (Closing & Tripping)

∙ Reclosing (Syncrocheck CUH 90 – VG Relay)

∙ Dynamic Monitoring Equipment (DME)

Impedance Relaying (POTT)