Network-based low current grounding system fault line selecting method

Abstract

The invention discloses a network-based low current grounding system fault line selecting method. The network-based low current grounding system fault line selecting method is characterized in that in a step (1), a fact that M0=0 is preset, because the number of data packets is always larger than or equal with 0, the method is set for covering data of all subsequent traffic packages, thereby ensuring comprehensiveness in data storage; in the step (1), monitoring data packets which are transmitted by each node of a wireless network are acquired in a manner of acquiring a data packet traffic Q1 of the node transmitted in one hour in wireless signal connection, and acquiring a data packet traffic Q2 of the node transmitted in one hour on the condition that wireless signal connection is off, and calculating the data packet M=(Q1-Q2) / 60, through the step, a stable data packet transmission condition of a wireless network in one minute can be obtained, thereby facilitating subsequent data comparison; in a step (2), a fact that Mi are in one-to-one correspondence with Xi is preset; and in a step (3), a fact that Xi are in one-to-one correspondence with Yi is preset, wherein i=0,1,2,3...,n, through presetting, a recursion relation along the stored values can be defined, thereby realizing recursion on a to-be-connected node through obtaining a network identification; and in a step (4), if a bug occurs, outputting ''result error'', and ending the program. The steps allow error in the execution method of the network-based low current grounding system fault line selecting method, and the program is stopped on the condition that an error occurs, thereby facilitating error correction by an operator.

Description

technical field [0001] The invention belongs to the field of network technology, in particular to a network-based fault line selection method for a small current grounding system. Background technique [0002] In my country's distribution network, the neutral point is generally not grounded, grounded through a high-resistance resistor, or grounded through an arc suppression coil. In the power grid whose neutral point is grounded in this way, when a single-phase ground fault occurs, the short-circuit current can only form a small current loop through the ground capacitance or impedance, which is called a small current grounding system. The current grounding method has been used in urban and rural medium and low voltage power grids in my country because it has many advantages in ensuring operation, overvoltage level, equipment insulation level, and economy. [0003] In the small current grounding system where the neutral point is not grounded or grounded by the arc suppressin...

AI Technical Summary

Problems solved by technology

However, the line selection devices manufactured according to these fault line selection principles do not yet have the reliability and accuracy for popularization and application in power systems.