Combined protection type power supply for logic protection amplification type power system fault detection device

Abstract

The invention discloses a novel power supply for a logic protection amplification type power system fault detection device. The novel supply for the logic protection amplification type power system fault detection device mainly consists of a transformer diode trigger circuit, a primary crystal oscillator circuit, a secondary crystal oscillator circuit and a power logic control circuit connected with the transformer diode trigger circuit, wherein the primary crystal oscillator circuit and the secondary crystal oscillator circuit are connected with the transformer diode trigger circuit. The transformer diode trigger circuit consists of a diode rectifier U, a transformer T and a trigger circuit, wherein the primary crystal oscillator circuit and the secondary crystal oscillator circuit are both connected with the trigger circuit. The novel power supply is characterized in that a logic protection amplification circuit is further connected between the transformer T and the power logic control circuit in series. A circuit structure can be greatly simplified, and radio-frequency interference of the circuits and external radio-frequency interference are reduced, so that the manufacturing cost and maintenance cost are remarkably reduced. In addition, the novel power supply can further effectively overcome the delayed effect of a traditional power supply circuit, and the quality of the power supply can be effectively improved.

Description

technical field [0001] The invention relates to a switching regulated power supply, in particular to a combined protection type power supply for a logic protection amplifier type power system fault detection device. Background technique [0002] At present, with the rapid development of the power industry, the equipment that people use for fault detection in the power system also has great development. Because the maintenance of the power system often involves hundreds of kilovolts or even millions of kilovolts of voltage lines, the maintenance lines are very long, so the power supply requirements for the fault detection equipment are also very high. However, at present, the mobile power supply provided by the fault detection equipment has a large ripple factor, which not only generates radio frequency electromagnetic interference, but also has a complex circuit structure, high maintenance and manufacturing costs, which limits the limitations to a large extent. The scope of...

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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 combined protection power supply for logic protection amplified power system fault detection devices

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