Whats the element in US power grid responsible for its contr

What’s the element in US power grid responsible for its control and protection?

Solution

Circuit breakers , relays and lightning arresters are the elements used in the protection of powergrid .

Circuit breaker : this equipment breakes the circuit when a fault occurs in the circuit which is coordinated by the relay by giving a tripping signal to the circuit breaker

Relay: it senses the fault by measuring fault current or by taking comparison of reactance up to the relay based on type of relay

Lighting arrester : it is the basic initially touched equipment when supply enters or leaves a substation .This works a lighting occurs on transmission line coming to substation so that voltage and current of circuit increased drastically and now lighting arrester provides a short circuit or low resistive circuit in order to protect substation from that high current.

In HVDC power transmission systems a new technology called WinTDC developed by Siemens company is used for power flow control and protection using computer programming. TDC:technology drive control