Inverse time limit protection method for vibration of hydroelectric generating set
A technology of inverse time protection and hydroelectric units, which is applied in hydroelectric power generation, vibration measurement, machines/engines, etc., can solve the problems that protection methods cannot accurately protect all working conditions, and achieve improved versatility, safety, good sensitivity, and reliability sex high effect
Active Publication Date: 2020-07-17
STATE GRID CORP OF CHINA +3
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Problems solved by technology
[0004] In view of this, the object of the present invention is to propose an inverse time protection method for hydroelectric unit vibration, to solve the problem that existing protection methods cannot accurately protect all working conditions
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0040] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. "Connected" or "connected" and similar terms are not limited to physical or me...
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The invention provides an inverse time limit protection method for vibration of a hydroelectric generating set. The method comprises the following steps of determining a motion setting value of each monitoring point for starting vibration protection, wherein the motion setting values are suitable for different operation conditions at the same time; acquiring a real-time vibration characteristic value of each monitoring point in a operation running state; judging whether the real-time vibration characteristic value is continuously greater than the vibration starting quantity within a preset number of times or not, if so, starting vibration inverse time limit protection, and calculating an accumulated value of the real-time vibration characteristic value; comparing the accumulated value witha preset numerical value, and when the accumulated value is greater than the preset numerical value, comparing the accumulated value with the action setting value to obtain a comparison result; and protecting the hydroelectric generating set according to the comparison result. According to the scheme that the vibration characteristic value is compared with the vibration starting quantity, the accumulated value under the condition that the vibration characteristic value is larger than the vibration starting quantity is compared, and two-step comparison is combined, effective protection can beprovided when working conditions are frequently switched, and vibration protection on any working condition and in the switching process of any working condition is achieved.
Description
technical field [0001] The invention relates to the technical field of hydroelectric unit protection, in particular to an inverse time protection method for hydroelectric unit vibration. Background technique [0002] At present, my country is the country with the most abundant hydropower resources in the world. As of the end of 2018, the national hydropower installed capacity reached 352.26 million kilowatts, and the annual power generation was 1,232.9 billion kwh, accounting for 18.5% and 17.6% of the national power installed capacity and annual power generation respectively. %. With the commissioning and operation of the Three Gorges, Wudongde, Baihetan and other large hydropower stations, my country's hydropower unit manufacturing technology has gradually developed from technology following to technology leading. However, in terms of hydropower unit operation and maintenance technology, there is still a lot of room for improvement in my country. Therefore, strengthening ...
Claims
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IPC IPC(8): F03B15/00F03B11/04F03B11/00G01H1/00G01H1/12G01H1/16
CPCF03B11/008F03B11/04F03B15/00G01H1/003G01H1/12G01H1/16Y02E10/20
Inventor 张飞潘伟峰江献玉孙尔军秦俊邓磊
Owner STATE GRID CORP OF CHINA