Searching method for grounded point of low current grounding system of rural power grid

Abstract

The invention discloses a searching method for a grounded point of a low current grounding system of a rural power grid based on the characteristics of less branch switches, more users on a line, poor substitutability of the line or no substitutability, long power supply radius of the line, much longer time for a maintenance person arriving the tail end of the line than arriving the head end of the line, and strong searching uncertainty of hidden failures of the line of the rural power grid. If the failure point is closer to the tail end of the line, the method is more obvious for shortening the power failure time of the line, the power failure time of users is shorter, and the number of users affected by the power failure is less. The novel line searching method is used for carrying out grading power failure searching on the line, thus the quantity of users suffering power failure can be greatly reduced, the power supply reliability of the country power grid is improved, the electric charge income is increased and unnecessary electricity utilization loss of electricity utilization users is avoided.

Description

Technical field [0001] The invention belongs to the technical field of power line emergency maintenance methods, and particularly relates to a method for finding the grounding point of a small-current grounding system in a rural power grid. Background technique [0002] In the past two years, there have been many cases of ground fault selection, which caused a large number of power users to outage, so that there were too many complaints from customers about power consumption, which increased the pressure on the company's quality service. If the grounding time is too long, it constitutes the safety of the power grid. If the grounding time is too long, it poses a serious threat to the safety of the power grid. It is easy to cause damage to the insulation of the equipment. accident. The increase in processing time for single-phase grounding faults will seriously threaten the safety of the power grid and the normal power supply to customers. There is a huge disparity in the time of...

AI Technical Summary

Problems solved by technology

Lines have poor or no mutual capacity. The power supply radius of the line is long. It takes much longer for maintenance personnel to reach the end of the line than to reach the beginning of the line.

Therefore, all users of this line have been without power, and the faulty line users have a long time of power outage.

Images