Generator stator winding end vibration on-line monitoring device and monitoring method thereof

Abstract

The invention discloses a generator stator winding end vibration on-line monitoring device disclosed by the present invention. The device comprises a first current polar plate and a second current polar plate which are arranged in parallel, wherein the first current polar plate is connected with a first divider resistor through a lead, the second current polar plate is connected with a second divider resistor through a lead, a lead between the first current polar plate and the first divider resistor and a lead between the second current polar plate and the second divider resistor are jointly connected with a differential amplification circuit, and an output end of the differential amplification circuit is connected with an analytical calculation and display unit. The invention further discloses a monitoring method of the generator stator winding end vibration online monitoring device. According to the generator stator winding end vibration on-line monitoring device and the monitoring method thereof, a vibration state of the stator winding end in the running state of the generator can be directly and effectively monitored, the structure is clear, and reliability is high.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment test monitoring, and in particular relates to an on-line monitoring device for the vibration at the end of a stator winding of a generator. Background technique [0002] For common large-scale turbogenerators, such as 300MW generators and 600MW generators, the ends of the stator windings are mostly bound structures, and the mechanical strength of the end hydroelectric joints is relatively poor. Severe vibration may cause problems such as broken ropes, insulation wear, and cracking of water and electricity connectors, which will further lead to failures such as hydrogen leakage, water leakage, and stator grounding. Therefore, the vibration detection of the generator stator winding end is extremely important. [0003] At present, the general generator does not have an on-line monitoring device for the vibration of the stator winding end. The vibration detection is mainly carried out wh...

AI Technical Summary

Problems solved by technology

Both methods are indirect methods, which cannot directly or effectively monitor the vibration state of the stator winding end under the running state of the generator

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