Special high-stability variable frequency power supply for measuring and checking power maintenance testing device

A technology of test equipment and variable frequency power supply, which is applied in the direction of measuring electrical variables, measuring devices, electrical components, etc., can solve the problems that the stability, frequency, waveform and distortion of on-site power supply cannot meet the test requirements of standard equipment and equipment, and cannot be calibrated. Achieve the effect of good anti-interference performance, protection of charging effect and high work efficiency

Active Publication Date: 2013-05-29
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +3
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Problems solved by technology

However, at present, the traceability of the accuracy and function of the condition-based maintenance test instruments and equipment is carried out in the laboratories of the provincial electrical research institutes with stable power systems, constant temperature, and constant humidity, and it is impossible to calibrate the equipment in real time

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  • Special high-stability variable frequency power supply for measuring and checking power maintenance testing device
  • Special high-stability variable frequency power supply for measuring and checking power maintenance testing device
  • Special high-stability variable frequency power supply for measuring and checking power maintenance testing device

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Embodiment Construction

[0024] As shown in the figure, the specific implementation of the high-stability variable frequency power supply dedicated to the measurement and verification of electric power maintenance test equipment is described as follows:

[0025] figure 2 It shows that the special variable frequency power supply for measurement and verification of electric power maintenance test equipment of the present invention includes a rectification filter circuit 2 cascaded with an inverter circuit; the output end of the above inverter circuit is connected to the primary coil of the isolation transformer 8, and the secondary coil of the isolation transformer 8 The coil is connected to the signal input end of the low voltage reactive power compensation circuit 10 . The signal output end of the buffer starting circuit 1 mainly composed of a time relay is connected with the signal input end of the rectification filter circuit 2 .

[0026] Above-mentioned inverter circuit adopts voltage regulating ...

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Abstract

Disclosed is a special high-stability variable frequency power supply for measuring and checking a power maintenance testing device. A rectifying filter circuit for converting alternating current into direct current is in cascade connection with an inverter circuit for converting direct current into alternating current, an output end of the inverter circuit is connected with a primary coil of an isolating transformer, and a secondary coil of the isolating transformer is connected with a signal input end of a low-voltage reactive power compensation circuit. A buffer starting circuit mainly comprises a time relay, and a signal output end of the buffer starting circuit is connected with a signal input end of the rectifying filter circuit. The special high-stability variable frequency power supply has input and output power isolating protection functions, and has the advantages of automatic voltage stability, adjustable frequency bandwidth, adjustable output voltage and fine interference resistance.

Description

technical field [0001] The invention relates to a power supply device for electric control test equipment, in particular to an AC variable frequency power supply device with high stability, frequency conversion, sine wave and micro-distortion used in a mobile laboratory for electric power maintenance test equipment. Background technique [0002] The condition-based maintenance test of power transmission and transformation undertakes the important task of diagnosing the defects of power transformation equipment, and plays an important role in ensuring the safe operation of the power grid. However, at present, the traceability of the accuracy and function of the condition-based maintenance test instruments and equipment is carried out in the laboratories of the provincial electrical research institutes with stable power systems, constant temperature, and constant humidity, and it is impossible to calibrate the equipment in real time. According to this situation, a mobile labor...

Claims

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Application Information

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IPC IPC(8): H02M5/458G01R35/00
Inventor 陈纓雷民袁恒徐子立罗涛张军
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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