Hydropower station starting temperature alarm method and system

A startup temperature, hydropower station technology, applied in the directions of hydropower, mechanical equipment, engine components, etc., can solve the problem of not adapting to the startup temperature of hydropower units, and achieve the effect of avoiding personal and property losses, ensuring safe and stable operation, and high availability.

CN114278485APending Publication Date: 2022-04-05NANJING NARI GROUP CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-04-05

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Abstract

The invention discloses a hydropower station startup temperature alarm method and system. The method comprises the following steps: constructing a startup temperature change curve sample library; selecting a sample curve from the starting temperature change curve sample library according to starting conditions of the hydropower station generator set; obtaining a real-time temperature change slope and a sample temperature change slope according to the real-time temperature of the hydropower station generator set and the sample curve; performing temperature anomaly judgment according to the real-time temperature change slope and the sample temperature change slope to obtain a judgment result, and judging whether to perform startup temperature alarm or not according to continuous N judgment results; and when the hydropower station generator set meets the start-up ending condition, stopping start-up temperature monitoring and start-up temperature warning. According to the method, the abnormal temperature change of the unit can be found before the starting temperature reaches the extreme temperature which can be tolerated by the equipment, and the temperature alarm is carried out, so that the method plays an important role in guaranteeing safe and stable operation of a power station.
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Description

technical field

[0001] The invention relates to a method and system for starting a temperature alarm of a hydropower station, and belongs to the technical field of hydropower station monitoring. Background technique

[0002] The measurement and monitoring of the temperature of the generator set in a hydropower plant mainly includes the monitoring of the operating temperature of the unit bearings (thrust bearings, guide bearings), stator cores and windings. The operating temperature of the generating set is the most important non-electrical quantity monitoring parameter of the power plant, which is directly related to the safe and stable operation of the generating set and the working life of the generating set. For a long time, the research on the application of temperature measurement in power stations has mainly focused on the method of measuring temperature and the method of temperature over-limit alarm. The temperature measurement method has developed from the initial th...

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, technical scheme of the present invention will be further described:

[0051] The present invention proposes a method for alarming the starting temperature of a hydropower station, such as figure 1 As shown, it specifically includes the following steps:

[0052] Step A. Constructing a sample library of temperature change curves during start-up. The present invention takes the historical data of the hydropower station monitoring system as the data basis, excavates the temperature rise process samples during the start-up process from the historical operating data of the unit, and completes data cleaning and time stamp regularization through a smoothing algorithm. , form a standard temperature change curve sample, and take the start-up temperature and room temperature as working conditions to establish a start-up temperature change standard curve sample library. like figure 2 As shown, the specific operation is as follows:...