Calculation method of ventilation system of exciter matched with large generator
A ventilation system and calculation method technology, applied in the direction of cooling/ventilation devices, electrical components, electromechanical devices, etc., can solve the problems of no public documents, etc., and achieve the effect of ensuring normal operation
Inactive Publication Date: 2016-01-06
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology
The market demand for the matching large-capacity brushless exciter is also becoming more and more obvious, but there are no public documents for reference in the calculation of the ventilation system of the exciter
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[0018] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.
[0019] The invention provides a calculation and analysis method for the exciter ventilation system of a large-scale generator, which considers the characteristic curve of the exciter fan itself and the structure of other parts of the exciter, inputs the structural parameters, generates the ventilation system diagram of the exciter and Simplify to obtain the equivalent wind path diagram, and solve the air volume distribution of each branch and the working point of the fan. Taking the 5800kW exciter supporting a 1000MW nuclear power generator as an example, the steps are as follows:
[0020] Step 1. Input the structural parameters of the exciter fan. The outer diameter of the fan is 1651mm, the inner diameter of the fan is 1225.6mm, and the width of the fan blade is 101.5mm. Using the classic formula (see P534, Ding Shunian. Heati...
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The invention provides a calculation and analysis method of a ventilation system of an exciter matched with a large generator, first a characteristic curve of an exciter fan and a ventilation system diagram of the exciter are calculated; then according to the structure of an exciter ventilation cooling system and a flow direction of cold air, wind resistance of the same branch is merged, and an equivalent wind path diagram of the exciter ventilation system is obtained; then a loop equation of the exciter ventilation system is listed and solved, a flow distribution situation of each branch is obtained, and a wind resistance characteristic curve of the exciter is drawn; and finally the characteristic curve of the exciter fan and the wind resistance characteristic curve of the exciter intersect to obtain working points of the exciter fan. Through a network node method, and based on a classic formula, a method for calculating and analyzing the ventilation system of the exciter matched with the large generator is obtained, and the method can adapt to the need of analysis of the ventilation system of the exciter matched with the large generator, and is of significance to ensuring normal operation of the exciter within the designed service life.
Description
technical field [0001] The invention relates to a calculation and analysis method for an exciter ventilation system matched with a large generator, and belongs to the technical field of generator ventilation calculation. Background technique [0002] Compared with static excitation, brushless exciter does not need high-current carbon brushes and collector rings, has less carbon dust, and does not need to replace carbon brushes. The maintenance work is small and the operation is stable. As the country vigorously develops environmentally friendly and pollution-free power resources, the demand for power in our society is increasing day by day, and the corresponding thermal power market continues to expand. 1000MW thermal power generators have gradually become mainstream units. Newly built power plants are also developing towards the goals of low coal consumption, low cost and high efficiency. The market demand for the matching large-capacity brushless exciter is also increasin...
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Inventor 张嘉康梁旭彪徐国俊郑东平邹玲玲
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD