Ship experiment generator set excitation loop time constant negative resistance compensation method and system

By constructing a real-time resistance function and active noise control, the gain coefficient of the negative resistance compensator is dynamically corrected, which solves the deviation between the simulated generator set and the prototype generator set in the excitation circuit time constant, achieves accurate dynamic response matching, and supports high-fidelity hardware-in-the-loop simulation.

CN121982959APending Publication Date: 2026-05-05HUAZHONG UNIV OF SCI & TECH
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Patent Information

Application Number
CN202610157443.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-04
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

The simulated generator set of the ship's experimental generator set has a systematic deviation in the excitation circuit time constant from the prototype, which causes the dynamic experimental response speed and mode to be inconsistent with the actual performance, and fails to accurately expose the stability problems in the design.

Method used

By constructing a real-time resistance function, injecting an inverse compensation voltage using the principle of active noise control, and combining empirical mode decomposition and Hilbert transform, frequency domain compensation commands are generated to dynamically correct the gain coefficient of the negative resistance compensator, thereby achieving active cancellation of the resistance increase caused by the temperature rise of the excitation winding and finely controlling the dynamic response of the system.

Benefits of technology

It achieves electrical performance of the simulated unit that closely approximates the target prototype in terms of static parameters and multi-band dynamic characteristics, solves the problem of insufficient experimental equivalence caused by inconsistent physical parameters, and supports more accurate dynamic simulation and testing.

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Abstract

The invention provides a ship experiment generator set excitation loop time constant negative resistance compensation method and system, and the method comprises the steps: measuring the cold state data of a simulation set excitation winding, constructing a real-time resistance function changing with the temperature, and carrying out the back calculation of the needed target total resistance according to the target time constant of a prototype. And in combination with the real-time current and temperature, a compensation voltage which is injected by the series power converter and is opposite to the thermal error voltage noise in phase is calculated and injected by the series power converter. And performing empirical mode decomposition and Hilbert transform on the compensated current signal, analyzing the instantaneous frequency characteristic of the compensated current signal, generating a frequency domain compensation instruction, and superposing the frequency domain compensation instruction to a control signal. The gain coefficient of the negative resistance compensator is dynamically corrected by comparing the deviation between the ideal output of a digital reference model and the real-time current. According to the method, the technical problem that the experimental result cannot accurately reflect the dynamic characteristics of a real system due to excitation time constant mismatch caused by inconsistency of physical parameters of a simulation unit and a prototype is solved.
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