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We are facing problems in deciding on an optimum neutral earthing scheme for any typical industrial plant at 11 kV and at 415 V operating with their respective motors and genenerators. The practices here are different in different regions. The British prefer a low resistance earth based on a...

A fault on the system causes rotor angle swings between connected generators, which is dependent on power mismatch, inertia and the time of fault clearance. In such cases the relative rotor angle differences between these sets are analysed or calculated using softwares. Associated with the...

Under frequency relays, suggested by "gordonl" have found to be less effective, as it has first to wait for frequency to fall to its setting level and then has its own time delay plus intentional delay to allow the relay to ride through a power swings. The end result is it allows the...

With a wide range of load shedding devices ranging for less effective under frequency relays with and without df/dt characteristics designed for quick shedding of loads, there still seems to be a lot of options floating around in terms of PLC based and other intelligent devices. I need to...