Power distribution network fault searching equipment

Abstract

The invention discloses power distribution network fault searching equipment which comprises a single chip microcomputer and peripheral system, a high-voltage pulse signal source main circuit and driving circuit and an S signal source main circuit and driving circuit. The power distribution network fault searching equipment is characterized in that the high-voltage pulse signal source main circuit and driving circuit and the S signal source main circuit and driving circuit are connected with the single chip microcomputer and peripheral system by electric conductors. The power distribution network fault searching equipment has the advantages that the power distribution network fault searching equipment is simple in structure, smart in design and convenient to use; high-voltage pulse methods and S injection methods are combined with one another, the traditional voltage and current point measurement methods can be replaced, accordingly, the power distribution network fault searching equipment is high in positioning speed, faults can be accurately positioned, line patrol can be omitted, the power distribution network line operation, maintenance and repair efficiency can be improved, and influence ranges of the faults can be narrowed.

Description

technical field [0001] The invention relates to the technical field of power grid monitoring, in particular to a distribution network fault finding device. Background technique [0002] The distribution network has many lines and the situation is complicated, which is the weakest link in the power system. When a ground fault occurs, the value of the fault current is often much smaller than the load current, the fault phase voltage drops to zero, and the non-fault phase voltage rises to several times the phase voltage, but the line voltage between the three phases remains symmetrical. There is no impact on the power supply load, so the regulations allow to continue to run for 1 to 2 hours. However, in actual operation, overvoltage may cause accidents such as power cable explosion, TV fuse blowout or even burnout, and bus short circuit. Therefore, quickly determining the system grounding point to eliminate single-phase ground faults is of great significance to the safe operat...

AI Technical Summary

Problems solved by technology

Although most of this searching method can be remedied by reclosing, with the rapid development of industry, for some electricity customers with high power supply requirements, the disadvantages of this method are obvious, especially for those with relatively heavy loads. Heavy 35kV lines, this method does not meet the requirements of safe and stable power supply, in view of the above problems, a distribution network fault finding equipment is proposed

Images