Compound protection type logic amplification type double-buffering driving power supply used for power failure detection

Abstract

The invention discloses a logic protection amplification type double-buffering driving power source for a power system fault detection device. The logic protection amplification type double-buffering driving power source is mainly composed of a diode rectifier U, a nonlinear trigger circuit, a double-buffering quartz crystal oscillator circuit and a power logic voltage stabilizing circuit, wherein the nonlinear trigger circuit is connected with the diode rectifier U, the double-buffering quartz crystal oscillator circuit is connected with the nonlinear trigger circuit, and the power logic voltage stabilizing circuit is connected between the diode rectifier U and the nonlinear trigger circuit in series. The logic protection amplification type double-buffering driving power source is characterized in that a logic protection amplification circuit is connected between the power logic voltage stabilizing circuit and the nonlinear trigger circuit in series. According to the logic protection amplification type double-buffering driving power source, the power logic voltage stabilizing circuit and the nonlinear trigger circuit are combined innovatively, the circuit structure can be greatly simplified, radio-frequency interference of the circuits and external radio-frequency interference can be lowered, and the manufacturing cost and the maintenance cost are greatly reduced.

Description

technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to a compound protection logic amplification double buffer drive power supply for electric fault detection. 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 large ripple coefficient, which not only produces radio frequency electromagnetic interference, but also has a complicated circuit structure, high maintenance and production costs, which largely limits The scope of use of fault detection equipment is no...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of large ripple coefficient, serious radio frequency interference, complex circuit and low efficiency existing in the current power supply for fault detection equipment, and provide a composite protection logic amplification double buffer drive power supply for power fault detection

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