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

Abstract

The invention discloses a symmetric transmission type driving power source for a power system fault detecting device. The symmetric transmission type driving power source is characterized by mainly comprising a diode rectifier U, a nonlinear trigger circuit, a main quartz crystal oscillator circuit, an auxiliary quartz crystal oscillator circuit and a power logic voltage stabilizing circuit; the nonlinear trigger circuit is connected with the diode rectifier U, the main quartz crystal oscillator circuit and the auxiliary quartz crystal oscillator circuit are 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 gate IC2, an AND-NOT gate IC3, an AND-NOT gate IC4, an N (negative) pole and the like, and the N pole is connected with an output end of the power amplifier P1. The symmetric transmission 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 switching stabilized voltage power supply, in particular to a constant current symmetrical trigger 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. , unable...

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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 symmetrical trigger drive power supply for power system fault detection devices

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