Fault Locator approach for high-impedance grounded or ungrounded distribution systems using synchrophasors

Fault Locators in general are designed for HV solidly grounded systems because of the importance of fault location detection in the overhead transmission lines. In distribution line fault location there are some developments that are based again on the impedance measurement from one end. Accurate fault location in distribution systems is more difficult to achieve because of the existence of multiple branches and also because system neutral point is usually grounded through the high impedance or is ungrounded. In these conditions, fault current is low and with a high capacitive component.