Sequence Impedance of Power System: Each element of power system will offer impedance to different phase sequence components of current which may not be the same. For example, the impedance…
Sequence Impedance and Networks of Transformers: It is well known that almost all present day installations have three-phase transformers since they entail lower initial cost, have smaller space requireÂments and…
Zero Sequence Impedance of Transmission Line: Zero Sequence Impedance of Transmission Line - A fully transposed three-phase line is completely symmetrical and therefore the per phase impedance offered by it…
Sequence Impedances and Networks of Synchronous Machine: Sequence Impedances and Networks of Synchronous Machine - Figure 10.11 depicts an unloaded synchronous machine (generator or motor) grounded through a reactor (impedance…
Sequence Impedances of Transmission Lines: Sequence Impedances of Transmission Lines - Figure 10.9 shows the circuit of a fully transposed line carrying unbalanced currents. The return path for In is…
Negative Phase Sequence Relay: A negative phase sequence relay (or phase unbalance) is essentially provided for the protection of generators and motors against unbalanced loading that may arise due to…
Unbalanced Rotor Impedance Operation: Earlier Unbalanced Rotor Impedance Operation were employed for starting and speed control. They are not in use any more. However, a loose contact in the rotor…
Sequence Networks Unsymmetrical Faults: The analysis of an unsymmetrical fault by symmetrical components method can be conveniently done by drawing sequence networks. A Sequence Networks Unsymmetrical Faults of a particular…