| 摘要 |
There is a method of fault clearance for a DC power grid (10), wherein the DC power grid (10) includes: a plurality of DC terminals (12a,12b,12c,12d); a plurality of DC power transmission media (14a,14b, 14c,14d) to interconnect the plurality of DC terminals (12a, 12b, 12c, 12d); and a plurality of DC circuit interruption device stations (18), each DC circuit interruption device station (18) being associated with a respective one of the plurality of DC power transmission media (14a,14b, 14c, 14d) and a respective one of the plurality of DC terminals (12a, 12b,12c, 12d), each DC circuit interruption device station (18) including a DC circuit interruption device (20) to selectively interrupt current flow in the associated DC power transmission medium (14a, 14b, 14c, 14d), the method comprising the steps of: (i) detecting one or more faults occurring in the plurality of DC power transmission media (14a, 14b, 14c,14d); (ii) after detecting the or each fault, opening all of the DC circuit interruption devices (20) to interrupt current flow in the plurality of DC power transmission media (14a,14b, 14c,14d); (iii) measuring electrical characteristics of each DC power transmission medium (14a, 14b, 14c,14d); (iv) identifying the or each faulty DC power transmission medium (14a, 14b, 14c, 14d), in which the or each fault is located, based on the measured electrical characteristics of the plurality of DC power transmission media (14a, 14b, 14c, 14d); and (v) after identifying the or each faulty DC power transmission medium (14a, 14b, 14c, 14d) in which the or each fault is located, inhibiting closing of the or each DC circuit interruption device (20) that is associated with the or each faulty DC power transmission medium (14a,14b, 14c,14d), in which the or each fault is located, and closing the or each DC circuit interruption device (20) that is associated with the or each non-faulty DC power transmission medium (14a, 14b, 14c, 14d), in which the or each fault is not located. |
