Exciter rotating rectifier branch cutoff detection device

Abstract

The invention discloses an exciter rotating rectifier branch cutoff detection device. The exciter rotating rectifier branch cutoff detection device at least comprises a signal acquisition unit and a signal analysis unit. The signal analysis unit completes the cutoff detection of the branch of the rotating rectifier based on the induction current data generated by the detection probe in the signalcollection unit near the rectifier. Induced current of the detection probe is output to the signal analysis unit in a differential-mode mode. The probe of the device can sense in time and transmit data to the signal acquisition unit, and when a cutoff fault occurs in the brushless exciter rotating diode rectifier, the device sends out an open-phase alarm signal through a cutoff detection algorithmto inform personnel to handle the fault, so that the expansion of equipment operation faults is avoided, and the operation safety of a unit is improved.

Description

technical field [0001] The invention belongs to the field of current interruption detection of motor components, in particular to a branch current interruption detection device of a rotary rectifier of an exciter. Background technique [0002] The excitation systems of large turbogenerators are divided into two categories: brushless excitation and static excitation. With the increase of the single unit capacity of the generator, the excitation current is also increasing. The carbon brushes and slip rings of the static excitation system are in poor contact, causing heat or even fire. The quality of the carbon brushes affects the stable operation of the unit. Carbon brushes need inspection and replacement. [0003] Therefore, many projects, especially domestic nuclear power units, are equipped with brushless excitation systems. The brushless excitation system has the problem that the monitoring means of the rotating rectifier is relatively lacking, and the running status of ...

AI Technical Summary

Problems solved by technology

[0006] According to the test results, the effective signal of the probe accounts for less than 3% of the overall output signal, and the difference between the installation distance of the probe and the electrical parameters of the detected object has a considerable impact on false positives and false negatives

In addition, in the actual application of the project, the parameter setting of the simulation circuit of the detection device requires repeated online debugging of each unit, which greatly affects the project schedule and wastes energy.

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