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Alarm method and alarm device for high-voltage motor bore sweep failure

An alarm device and high-voltage technology, applied in the field of motors, can solve problems such as failure to alarm, and achieve the effect of avoiding short-circuit faults between phases and even causing

Active Publication Date: 2022-02-25
SHENHUA GUONENG ENERGY GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiment of the present application is to provide an alarm method and an alarm device for a high-voltage motor bore sweep failure, so as to solve the technical problem in the related art that the electric motor stator and rotor bore sweep failure cannot be alarmed in an early stage.

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  • Alarm method and alarm device for high-voltage motor bore sweep failure
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  • Alarm method and alarm device for high-voltage motor bore sweep failure

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Embodiment Construction

[0015] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0016] The features of the terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at leas...

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Abstract

The application discloses an alarm method and an alarm device for a high-voltage motor chamber sweep failure, which relate to the technical field of electric motors and solve the technical problem that it is difficult to timely detect a high-voltage motor chamber sweep failure in related technologies. The alarm method includes: when the high-voltage motor is started, the voltage value of the phase voltage signal and the voltage value of the line voltage signal are obtained; wherein, the high-voltage motor is directly connected to the high-voltage power grid through the busbar and is supplied with three-phase alternating current by the high-voltage power grid, and the phase voltage signal Including at least one of the three-phase phase voltages of the busbar, the line voltage signal includes at least one of the three-phase line voltages of the busbar; determining whether the voltage value of the phase voltage signal is greater than a first voltage value, the first voltage value is normal operation of the high-voltage motor In the case of the voltage value of the phase voltage signal, the first voltage value is a value obtained by dividing the voltage value of the line voltage signal by the value; when the voltage value of the phase voltage signal is greater than the first voltage value, an alarm signal is issued. This application is used for chamber sweep alarm.

Description

technical field [0001] The present application relates to the technical field of electric motors, in particular to an alarm method and an alarm device for a high-voltage electric motor bore sweep failure. Background technique [0002] Three-phase asynchronous high-voltage motors are common driving equipment in thermal power plants and other industrial and mining enterprises. If the motor has bearing damage, squirrel cage broken bars or other faults or foreign matter enters the air gap of the stator and rotor, it is easy to cause a stator and rotor sweep accident, resulting in wear of the stator and rotor core, short circuit of the stator winding to the ground, and even damage to the stator winding and stator core. Severely damaged, burnt. [0003] In the related technology, when the fault of the stator and rotor sweeping causes the single-phase grounding of the stator winding or even a short circuit between phases, an alarm signal can be sent through zero-sequence voltage p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/18
CPCG08B21/185G08B21/182
Inventor 王云峰毛德先丁峰
Owner SHENHUA GUONENG ENERGY GRP
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