Constant current double buffer trigger-type driving power supply for power system fault detecting device

Abstract

The invention discloses a double-buffering trigger type driving power source for a power system fault detecting device. The double-buffering trigger type driving power source mainly comprises a diode rectifier U and a nonlinear trigger circuit. The nonlinear trigger circuit is connected with the diode rectifier U. The double-buffering trigger type driving power source is characterized by further comprising a double-buffering quartz crystal oscillator circuit and a power logic voltage stabilizing circuit; the double-buffering quartz crystal oscillator circuit is connected with the nonlinear trigger circuit, and the power logic voltage stabilizing circuit is arranged between the diode rectifier U and the nonlinear trigger circuit in a serial connection manner; the power logic voltage stabilizing circuit comprises a power amplifier P1, an AND-NOT gate IC1, an AND-NOT IC2, an AND-NOT IC3, an AND-NOT IC4 and the like. The double-buffering trigger type driving power source has the advantages that the power logic voltage stabilizing circuit and the nonlinear trigger circuit are creatively combined with each other, accordingly, circuit structures can be greatly simplified, radio frequency interference of the circuits and external radio frequency interference can be reduced, and the manufacturing cost and the maintaining cost can be greatly lowered.

Description

technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to a constant-current double-buffer trigger-type driving power supply for a power system fault detection device. Background technique [0002] At present, with the rapid development of the power industry, the equipment that people use for power system fault detection has also developed greatly. Since the maintenance of the power system often involves voltage lines of hundreds of kilovolts or even millions of kilovolts, the maintenance lines are very long, so the power supply requirements for fault detection equipment are also very high. However, at present, the mobile power supply provided by the fault detection equipment has a relatively large defect, that is, it is susceptible to electromagnetic interference, causing its working current to be unable to maintain a constant value, thus affecting the detection effect of the fault detection equipment to a large extent. , un...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the current power supply for fault detection equipment is susceptible to electromagnetic interference, resulting in the inability to maintain a constant value of its working current, and to provide a constant-current double-buffer trigger-type drive power supply for power system fault detection devices

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