Constant current energy-saving drive power supply for electric power system fault detection apparatus

Abstract

The invention discloses a driving power source for a power system fault detecting device. The driving power source mainly comprises a diode rectifier U, a power amplifier P1, a transformer T, a switch filter circuit, a slider regulator, a power output circuit and a voltage transformation feedback circuit. The switch filter circuit is arranged between an anode output end of the diode rectifier U and a same-phase end of the power amplifier P1 in a serial connection manner, the slider regulator is connected with a sliding tap of a primary coil L1 of the transformer T, the power output circuit is connected with a secondary coil L2 of the transformer T, and the voltage transformation feedback circuit is connected with a secondary coil L3 of the transformer T. The driving power source has the advantages that high-quality input voltages can be provided for the transformer T by a novel power logic voltage stabilizing circuit, accordingly, circuit structures can be 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 energy-saving drive 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 to meet...

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 defect that its working current cannot maintain a constant value, and to provide a constant current energy-saving drive power supply for power system fault detection devices

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