Method and related device for locating ring power network fault

An electronic device comprising a memory, a processor and a computer program stored in the memory and running on the processor, wherein the processor, when executing the computer program stored in the memory, implements the following steps:

• expanding in each ring line segment with an arbitrary point as a coordinate origin in a ring power network to construct a plurality of reference coordinate systems, wherein the each ring line segment is a line segment between two adjacent monitoring point positions;
• acquiring monitoring point coordinate information and wavehead arrival time information of each of the monitoring point positions in each of the plurality of reference coordinate systems;
• acquiring assumed fault point information, wherein the assumed fault point information comprises an assumed fault point coordinate, assumed occurrence fault time and an assumed fault section;
• acquiring a traveling wave propagation speed;
• constructing a plurality of distributed fault location equation sets according to the monitoring point coordinate information, the wavehead arrival time information, the assumed fault point information and the traveling wave propagation speed in each of the plurality of reference coordinate systems;
• and
• determining an actual fault position according to a solution result of each of the plurality of distributed fault location equation sets and the assumed fault section,
• wherein the constructing the plurality of distributed fault location equation sets according to the monitoring point coordinate information, the wavehead arrival time information, the assumed fault point information and the traveling wave propagation speed in each of the plurality of reference coordinate systems comprises:
• constructing a fault location default equation set if the wavehead arrival time information is missing at some of the monitoring point positions;
• constructing the plurality of distributed fault location equation sets according to the fault location default system equation set, and the acquired monitoring point coordinate information, the wavehead arrival time information, the assumed fault section and the traveling wave propagation speed in each of the plurality of reference coordinate systems, wherein the fault location default system equation set is as follows:
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• wherein x is the assumed fault point coordinate, t is the assumed fault occurrence time, x0, X1, . . . , Xi-n is the monitoring point coordinate information, t0, t1, . . .,ti-n is the wavehead arrival time information, n is a number of the monitoring point positions without acquiring the wavehead arrival time information, and v is the traveling wave propagation speed.