Adaptive power adjusting device for FDS testing

Abstract

The invention relates to an adaptive power adjusting device for FDS testing. After a control module obtains a turning frequency calculated according to an approximate equivalent capacitance value of atested sample measured under a power frequency, a control signal is outputted to a power module according to the turning frequency; and the power module is controlled to enable the amplitude of the output voltage to be a first type of voltage amplitude when the frequency of the output voltage is smaller than the turning frequency and to enable the amplitude of the output voltage to be a second type of voltage amplitude when the frequency of the output voltage is larger than or equal to the turning frequency, wherein the first type of voltage amplitude is larger than the second type of voltageamplitude. On the basis of combination of the turning frequency, the frequency and the amplitude of the output voltage of the power module are adjusted; the voltage peak value can be adjusted duringthe frequency sweeping process of the tested sample testing; the current difference between the low frequency band and the high frequency band is reduced; and the measurement accuracy is improved. Meanwhile, the power output of the whole frequency sweeping stage can be controlled by adjusting the output voltage, so that waveform distortion caused by exceeding of the rated output power of the device can be avoided.

Description

Technical field [0001] This application relates to the technical field of power grids, in particular to an adaptive power adjustment device for FDS testing. Background technique [0002] As the core equipment of the power system, the transformer undertakes the functions of voltage conversion, energy transmission, and power distribution. The insulation performance is directly related to the operational reliability of the power system. The accidents caused by the insulation system account for about 85% of the transformer accidents. the above. Oil-immersed transformers are the most widely used in power grids. A composite system composed of insulating oil and insulating paper is the main insulation system. Moisture has a serious impact on it, worsening the insulation performance of the transformer, and seriously threatening the service life and operation of the transformer. The economy and reliability. Therefore, it is necessary to regularly detect the water content of the transfor...

AI Technical Summary

Problems solved by technology

The traditional FDS test device mainly includes a power output part and a measurement part. When performing frequency sweep output, the output voltage frequency changes with the preset value while the voltage peak value is fixed, which easily leads to large errors in the low-frequency current measurement value. , affecting the test accuracy

It may also cause the power of the output device to be insufficient to meet the requirements of the test, resulting in distortion of the test waveform

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