Constant current circuit-based power supply for power system fault detection device

Abstract

The invention discloses a logic control circuit based power source for a power system fault detection device. The power source mainly comprises a transformer diode trigger circuit, a power logic control circuit, a primary crystal oscillating circuit and a secondary crystal oscillating circuit, wherein the primary crystal oscillating circuit and the secondary crystal oscillating circuit are connected with the transformer diode trigger circuit. The power source is characterized by further comprises a power logic control circuit connected with the transformer diode trigger circuit, the transformer diode trigger circuit comprises a diode rectifier U, a transformer T and a trigger circuit, and the primary crystal oscillating circuit and the secondary crystal oscillating circuit are both connected with the trigger circuit . The logic control circuit based power source has the advantages that circuit structures can be greatly simplified to reduce intrinsic and external radio-frequency interference for the circuits, and accordingly manufacturing cost and maintenance cost are greatly reduced; in addition, delay effects of traditional power circuits can be overcome effectively, and quality of the power source can be effectively improved.

Description

Technical field [0001] The invention relates to a switching stabilized power supply, in particular to a power supply for a power system fault detection device based on a constant current circuit. 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 greatly developed. Since the overhaul of the power system often involves several 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, the current mobile power supply provided by the fault detection equipment has a big defect, that is, it is susceptible to electromagnetic interference, which causes its working current to be unable to maintain a constant value, which greatly affects the detection effect of the fault detection equipment. , Can not meet people's demand for high-prec...

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 power supply for power system fault detection devices based on a constant current circuit

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