Device and method for simulating short circuit faults of doubly-fed generator rotor

Abstract

The invention discloses a device and a method for simulating short circuit faults of a doubly-fed generator rotor. The device comprises six groups of leads which are led out from the interior of a magnet exciting coil of the doubly-fed generator rotor, the six groups of leads at the non-shaft-extension end or the shaft extension end of the rotor are connected with six groups of carbon brushes respectively via a slip ring, the six groups of carbon brushes are connected with a short circuit cabinet via leads, a controllable contactor is mounted in the short circuit cabinet, and a turn-to-turn short circuit control button, a rotor interphase short circuit control button, a rotor interlayer short circuit control button and a phase-to-ground interphase short circuit control button are arranged on the short circuit cabinet. On and off of the controllable contactor is controlled by the different buttons to achieve connection and disconnection of different leads, so that controllable simulation of various short circuit faults of a generator is achieved. The invention further provides a leading method of the device and the method for simulating the short circuit faults of the doubly-fed generator rotor. The device and the method have the advantages that the short circuit faults of the generator rotor can be simulated truly, actual short circuit fault signals of the generator rotor can be acquired, and support is provided for researches and verifications of relative fault diagnosis algorithms.

Description

technical field [0001] The invention relates to the technical field of generator fault diagnosis, in particular to a device and method for simulating a double-fed generator rotor short-circuit fault. Background technique [0002] Generator rotor short circuit faults include: coil interturn short circuit, interlayer short circuit, interphase short circuit, and relative ground short circuit. At present, for the simulation of each short-circuit fault of the DFIG rotor, two methods are usually used. One method is to simulate the fault of the rotor coil by connecting a resistor in series with a certain phase of the rotor. Another method is to directly create various short-circuit defects on the generator rotor. The structure of the generator used in the current device is very different from that of the real doubly-fed generator, the simulation effect is poor, and it is difficult to fully obtain the more realistic short-circuit fault signal of the generator rotor. [0003] Exist...

AI Technical Summary

Problems solved by technology

The structure of the generator used in the current device is very different from that of the real doubly-fed generator, the simulation effect is poor, and it is difficult to fully obtain the more realistic short-circuit fault signal of the generator rotor

[0003] Existing devices and methods for simulating rotor short-circuit faults of doubly-fed generators can only simulate certain short-circuit faults, and it is difficult to simulate all types of short-circuit faults of the rotor on one device

The method of directly manufacturing various short-circuit defects on the generator rotor is destructive, and each short-circuit fault is irrecoverable, and it is impossible to simulate various short-circuit faults of the generator rotor through an external control device

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