FAULT LOCATION OF DC DISTRIBUTION SYSTEMS

摘要

Unique systems, methods, techniques and apparatuses of fault location in DC power distribution systems are disclosed. One exemplary embodiment is a DC power distribution system including a plurality of zones each including a DC power distribution line and a protective device. Each protective device structured to sense one or more electrical characteristics of a line and to controllably open a circuit including the line. At least one intelligent electronic device is structured to determine a line inductance based upon electrical characteristics sensed by one or more of the protective devices and to evaluate a location of the line fault based upon the determined line inductance.

主权项

1. A DC power distribution system comprising:
a plurality of DC power distribution zones bounded by one or more zone boundaries, each of said zones including at least one DC power distribution line and at least one protective device operatively coupled with the DC power distribution line, each protective device structured to sense one or more electrical characteristics associated with the DC power distribution line with which it is operatively coupled and to controllably open a circuit including said DC power distribution line based upon detection and location of a line fault; at least one intelligent electronic device structured to determine one or more line inductance values based upon the one or more electrical characteristics sensed by one or more of the protective devices and to evaluate a location of the line fault based upon the determined line inductance values; and at least one inductor coupled with a DC distribution line of one of the plurality of zones, the inductor having an inductance value such that line inductances of each of the plurality of zones when no fault is present differ in magnitude such that the line inductance values determined by the at least one intelligent electronic device during a line fault uniquely identify one of the plurality of DC power distribution zones as containing the line fault.