Diesel generator rotating speed control device and rotating speed amplitude large selection circuit thereof

By designing a speed amplitude selection circuit, the problem of frequent signal switching of the emergency diesel generator set in the nuclear power plant was solved, the stability and reliability were improved, and the anti-interference ability and signal-to-noise ratio were enhanced.

CN223387425UActive Publication Date: 2025-09-26GUANGDONG NUCLEAR POWER JOINT VENTURE
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Patent Information

Application Number
CN202423191607.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-09-26
Estimated Expiration
2034-12-20

AI Technical Summary

Technical Problem

The speed amplitude selection circuit of the emergency diesel generator set in a nuclear power plant has poor anti-interference ability and high risk of frequent switching of output signals, resulting in reduced stability and reliability.

Method used

A speed amplitude selection circuit is designed, including a signal isolation unit, a comparison unit, and a hysteresis selection unit. Through signal isolation, amplitude comparison, and hysteresis selection, it is ensured that the signal is switched to the speed regulator only when the real-time amplitude is maximum and the difference with the current output amplitude is greater than the set value, thus avoiding frequent switching.

Benefits of technology

It improves the stability and reliability of diesel generator sets in nuclear power plants, enhances the anti-interference ability and signal-to-noise ratio of speed signals, and ensures stable signal output.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a diesel generator rotating speed control device and a rotating speed amplitude large selection circuit thereof, and the circuit comprises a signal isolation unit which is used for connecting each rotating speed sensor so as to isolate each rotating speed signal; the comparison unit is connected with the signal isolation unit and is used for comparing the amplitude of each isolated rotating speed signal; the return difference selection unit is connected with the signal isolation unit and the comparison unit, is used for outputting one rotating speed signal to a speed regulator when the diesel generator is just powered on to work, and is also used for being matched with the comparison unit; and when an amplitude difference value obtained by subtracting the rotating speed signal currently output to the speed regulator from the maximum real-time amplitude value in the rotating speed signals is greater than a set value, the rotating speed signal with the maximum real-time amplitude value is output to the speed regulator. According to the utility model, under the condition of ensuring the stability of the input signal of the debugger, the principle of large selection of rotation speed signal amplitude is met, and the stability of the nuclear power station diesel generator set is improved.
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