Online Identification of Distribution Line Parameters by PMUs under Accuracy, Positive Sequence, and Noise Considerations

Figure 1

Distribution line equivalent model (π-Type). (a) One-line diagram using the phasor quantities (b) One-line diagram using the positive sequence quantities. The parameters of the above circuits are described as follows: , equivalent impedance at the source side; , positive sequence equivalent impedance at the source side; , equivalent impedance at the receiving end; , ppositive sequence equivalent impedance at the receiving end; , distribution line impedance; , positive sequence distribution line impedance; , distribution line admittance; , positive sequence distribution line admittance; , phase voltages at sending end; , positive sequence phase voltages at sending end; , phase voltages at receiving end; , positive sequence phase voltages at receiving end; , Phase current at sending end; , positive sequence phase current at sending end; , phase current at receiving end; , positive sequence phase current at receiving end.

(a)

(b)