2results about How to "Measure security" patented technology

The utility model discloses a transformer sound level measurement auxiliary device, which comprises a plurality of sound level probes used for acquiring sound signals of a transformer, and further comprises a probe bearing frame covering the periphery of the transformer, and the plurality of sound level probes are arranged along the circumferential direction of the probe bearing frame. The sound level probes are located on the same horizontal plane, and the distances from the sound level probes to the outer surface of the transformer are equal. According to the utility model, the problem of inconsistent measurement distances caused by positioning deviation in traditional manual measurement is effectively solved, and the accuracy and reliability of measurement data are ensured; secondly, the sound level meter does not need to be held manually or the position of the measuring head does not need to be adjusted frequently, the electric shock safety risk possibly faced by manual operation under the electrified working condition is greatly reduced, and the personal safety of operators is guaranteed; and multiple measuring points can be measured at the same time, so that the condition of long time consumption of a single test caused by manual switching measurement of multiple measuring points in the prior art is changed, and the detection efficiency is greatly improved.

This invention discloses a high-speed train impedance measurement method based on adaptive broadband voltage disturbance. It eliminates the influence of frequency overlap effects on impedance measurement during broadband disturbance injection in VSC-type high-speed trains by using odd-even segmented multi-frequency disturbance signals. Simultaneously, it incorporates a disturbance generation device for adaptive broadband disturbance control. Besides generating odd-even segmented multi-frequency voltage disturbances for VSC-type high-speed train impedance measurement, this invention can adaptively adjust the frequency resolution by evaluating the fluctuation level of the impedance amplitude-frequency characteristic curve, improving the measurement accuracy in frequency bands with large impedance curve fluctuations. Furthermore, it can adaptively adjust the disturbance amplitude based on the DC-side voltage fluctuation of the disturbance generation device, preventing excessive disturbances from affecting the normal operation of the system and thus ensuring measurement safety.