Synchronous compensator rotor turn-to-turn short circuit fault diagnosis method and device and storage medium

Abstract

The invention discloses a synchronous compensator rotor turn-to-turn short circuit fault diagnosis method and device and a storage medium. The method comprises the steps of acquiring the electric parameters such as reactive output power, exciting current, a rotor rotation speed and stator end voltage of a synchronous compensator and direct-axis synchronous reactance and direct-axis armature reaction reactance when the synchronous compensator does not break down under a stable operation state of the synchronous compensator; calculating a rotor turn-to-turn short circuit fault short-circuit ratio of the synchronous compensator according to the acquired electric parameters; and carrying out rotor turn-to-turn short circuit fault diagnosis on the synchronous compensator according to the short-circuit ratio. According to the method and device and the storage medium, the rotor short circuit faults can be online judged through the electric monitoring quantities during the stable operation ofthe synchronous compensators.

Description

technical field [0001] The invention relates to a method, a device and a storage medium for diagnosing a short-circuit fault between turns of a rotor of a synchronous condenser, and belongs to the technical field of motors. Background technique [0002] With the development of DC UHV transmission technology, large-capacity new condensers have become the best choice to meet the reactive power dynamic requirements of the system, and are gradually put into operation in DC UHV converter stations. The operation of the synchronous condenser can maintain the stability of the system voltage when the system fails, and provide the system with short-circuit capacity, which has a strong support for the transient variables of the system. However, the failure of the synchronous condenser will affect the power system. Steady-state operation has a greater impact. [0003] Since the rotor will bear greater mechanical stress and thermal stress during the operation of the condenser, compared ...

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Problems solved by technology

However, the fault will cause the temperature of the winding to rise and the large mechanical vibration, which will further damage the insulation of the winding, make the fault worse, and even cause a more serious shutdown accident

[0004] Since the new synchronous condenser has just been put into operation, there are few researches on the fault diagnosis of the rotor turn-to-turn short circuit of the synchronous condenser at this stage, and there is a lack of effective diagnostic methods for the synchronous condenser

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