PSPT Academy

This course is intended to introduce the engineer and technologist to the concepts of relay protection and control of high voltage systems. It starts with a discussion on the purpose, requirements and elements of protective relaying, from the prospect of removing the faulted power equipment quickly, to minimize equipment damage, limit the effects of the disturbance, and maintaining the stability of the system, along with the elements required to do this.

Switchyard configuration and elements are introduced and discussed, including breaker types (Bulk & Minimum Oil, Air Blast, Vacuum, SF6) as well as instrument and 3 phase power transformers.

Protection schemes are looked at and defined starting with the simplest surge protection devices, including high voltage fuses and their coordination, using time current curves. Moving up in sophistication from the instantaneous & timed over current protection schemes, to differential protection, distance and impedance protection, including permissive overreach transfer tripping schemes.

Also reviewed is the concept of protection zones along with fault types and characteristics and relaying terminology, including the IEEE function numbering system.

Although the concepts and protection theories learned here is quite independent of the associated devices used, examples of both old (but still in service) and modern relay are demonstrated while reviewing the various protections schemes.

As an experienced protection engineer, this is the type of course I wish was available when I was starting out in the industry. In fact, this is the main reason that I developed it.