Substation Protection and Control

Power substations contain expensive pieces of equipment. If protection is not installed then you can watch them explode. A piece of protection also has to do with safety of personnel for instance fast trip settings, disabling breaker reclose, arc-flash settings etc.

Basics of Pilot Relaying & Application Considerations For Transmission Line Protection

Pilot relaying refers to the communication network implemented on the high voltage transmission line (T-line) to transmit “trip or don’t trip” signal to and fro between two or more substations. The intent here is to trip the circuit breakers as fast as possible when a fault strikes the T-line, therefore, protecting it.

Wave Trap with Corona Fittings

Directional Comparison Blocking Scheme

The Directional Comparison Blocking (DCB) scheme is the most popular pilot relaying scheme, implemented to protect high voltage power lines. This scheme is more dependable than a permissive transfer trip scheme because it trips the breaker even when there is no carrier signal from the remote end pilot relay. Let’s dive into details.

Fault Zones
Scroll to Top