Method for improving anti-interference ability of rotary mechanical shaft vibration measurement system

Abstract

The invention provides a method for improving the anti-interference ability of a rotary mechanical shaft vibration measurement system. The method comprises the following steps: detecting the rotary mechanical shaft vibration measurement system by conducting the immunity tests on electrical fast transient / burst (EFT / B), so as to determine the part having poor anti-interference ability in the rotary mechanical shaft vibration measurement system; shielding the part having poor anti-interference ability according to the electromagnetic compatibility (EMC) principle; and detecting whether the part having poor anti-interference ability meets the requirements or not according to the immunity tests on EFT / B. The method can detect the part having poor anti-interference ability in the rotary mechanical shaft vibration measurement system on an accurate, timely and effective basis, effectively avoid the tripping operation caused by the automatic protection of the main engine of the power grid due to severe electromagnetic interference, ensure the normal operation of the main engine of the power grid, improve the safety and reliability of the power grid and avoid the huge economic loss caused by the tripping operation of the main engine due to the electromagnetic interference.

Description

Technical field [0001] The invention relates to the field of rotating machine shaft vibration measurement monitoring and control, and in particular to a method for improving the anti-interference ability of a rotating machine shaft vibration measurement system. Background technique [0002] The working environment of electronic equipment in power plants is relatively harsh, and there are many interference sources. There are strong electromagnetic fields around various high-voltage, high-current, and large-inductance equipment, and they often change, radiating to the electronics on the production line through various methods. In the equipment, the safe and stable operation of the unit is affected. Among them, the rotating machinery shaft vibration measurement system used to monitor whether the vibration displacement of high-speed rotating rotating machinery shafts such as steam turbines, motors, and feedwater pumps will exceed the protection value is often subject to electromagnet...

AI Technical Summary

Problems solved by technology

Since the radio frequency interference range of the walkie-talkie is large, and the amplitude of the radio frequency interference signal sent is affected by the distance and the power transmitted at that time, it is difficult to locate the part with weak anti-interference ability on the measurement system, and the repeatability of this detection method is poor. It is also difficult to obtain specific data

In addition, the bandwidth of the interference signal sent by the walkie-talkie is narrow, which cannot cover the bandwidth range of electromagnetic interference received by the electronic equipment of the vibration measurement system of the rotating machinery shaft.

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