Method for measuring temperature of rotor of brushless exciter under real-time working condition
A technology of rotor temperature and real-time working conditions, which is applied to thermometers, thermometers, and measuring devices that use electric/magnetic components that are directly sensitive to heat, and can solve problems such as the inability to directly measure the rotor temperature of brushless exciters
Inactive Publication Date: 2012-07-11
CHINA TECHENERGY +1
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[0004] In order to solve the problem that the rotor temperature of the brushless exciter cannot be directly measured in the prior art, the present invention provides a method to calculate the rotor voltage and rotor resistance corresponding to the real-time excitation current value of the brushless exciter under all working conditions according to the existing data The sub-function relational expression, and then use the iterative algorithm to obtain the method of the rotor temperature of the brushless exciter
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[0024] Figure 1 is a brief description of the steps of the method:
[0025] 101. Obtain the specific excitation current value of the brushless exciter and its corresponding rotor voltage and rotor resistance sub-function relational expression;
[0026] For each generator rotor, the manufacturer will conduct corresponding experiments before leaving the factory to determine some basic data, including the corresponding rotor voltage and rotor resistance sub-function relational expressions at a specific excitation current value. Since this scheme needs to realize real-time Rotor temperature measurement under working conditions, so it is necessary to use the existing specific excitation current value, and its corresponding rotor voltage and rotor resistance sub-function relationship to calculate the real-time excitation current value and its corresponding rotor voltage and rotor resistance under real-time working conditions Rotor resistance sub-function relational expression. Accor...
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The invention relates to a method for measuring the temperature of a rotor of a brushless exciter under the real-time working condition, which comprises the following steps of: by the existing subfunction relation of a specific exciting current value and a rotor voltage and a rotor resistance, which correspond to the specific exciting current value, of the existing brushless exciter, calculating to obtain a subfunction relation of a real-time exciting current value and a rotor voltage and a rotor resistance, which correspond to the real-time exciting current value, of the brushless exciter under the real-time working condition; and then deducing the temperature of the rotor of the brushless exciter under the real-time working condition by utilizing an iterative algorithm. According to the invention, the temperature of the rotor of the brushless exciter is measured by adopting an indirect mode, so that devices such as a detection coil, a measurement sliding ring and the like are avoided being arranged on a stator of the brushless exciter, a measuring device is simplified, the reliability of the equipment operation is greatly improved, the maintenance and overhaul workload is reduced, the thermal stress level of the rotor of the brushless exciter can also be monitored in real time, the temperature change rule in a rotor thermal stress zone in the actual operating process of a unit is more accurately known and reliable parameter information is provided for ensuring the safety operation of the generating unit.
Description
technical field [0001] The invention relates to a method for measuring the temperature of the rotor of a generator, in particular to a method for measuring the temperature of the rotor of a brushless exciter under all working conditions. Background technique [0002] With the global energy shortage, the development of clean and efficient energy is imminent for human beings. The use of nuclear energy is still one of our must-choices at the moment, and the mega-kilowatt unit will gradually become the main unit for my country’s electric power development, and it is also the first choice for our nuclear power development today. The main unit, so the safe and stable operation of high-parameter units is an important link related to the safe production of nuclear power plants. As one of the most important parts of generators, the rotor, due to its harsh working It is one of the weak links in the service life of the 10,000-class unit. Therefore, it is very important and meaningful for...
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Inventor牛丽霞马吉强刘元孟庆军杨砚雄吴显东詹相国何文广张丽虹韦志超王勇刚孙仲华闵礼书李妮王志嘉
OwnerCHINA TECHENERGY