本文選題：水輪發(fā)電機(jī)　切入點(diǎn)：股線換位　出處：《哈爾濱理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：由于水輪發(fā)電機(jī)容量的不斷增大，定子股線中的循環(huán)電流和環(huán)流損耗越來越大，在大型發(fā)電機(jī)設(shè)計時準(zhǔn)確計算股線環(huán)流損耗是十分必要的。本文以180MW水輪發(fā)電機(jī)為研究對象，，使用解析法和數(shù)值法分別計算不同換位情況下的股線中循環(huán)電流和環(huán)流損耗，并對這兩種計算方法比較分析，可為求取股線中的循環(huán)電流和環(huán)流損耗提供更加準(zhǔn)確的計算方法。 首先，簡要介紹股線回路法和漏感電勢法計算股線環(huán)流損耗方法，并使用漏感電勢法計算定子股線在進(jìn)行360全換位時、不足360換位在不同換位角度情況時、360空換位在不同空換位段長度情況時以及延長360換位時的股線循環(huán)電流和環(huán)流損耗。 其次，對數(shù)值法計算股線循環(huán)電流和環(huán)流損耗進(jìn)行簡單的描述，并使用數(shù)值法計算360全換位、不足360換位在空三根股線以及360空換位在空換位段長度為434mm時的股線循環(huán)電流和環(huán)流損耗，并分析不足360換位在不同換位角度情況下、360空換位在不同空換位段長度及空換位段在槽中不同位置處時的股線循環(huán)電流和環(huán)流損耗。 最后，將漏感電勢法和數(shù)值法計算的股線環(huán)流損耗進(jìn)行對比分析；并提取數(shù)值法股線周圍的槽部漏磁場和端部漏磁場分布圖，與漏感電勢法中的槽部漏磁場和端部漏磁場假設(shè)分布進(jìn)行對比分析，說明解析計算方法的不足以及數(shù)值計算方法的必要性和準(zhǔn)確性。
[Abstract]:Due to the increasing capacity of hydrogenerator, the circulating current and circulation loss in stator strands are more and more large. It is necessary to accurately calculate the circulation loss in the design of large generators. In this paper, 180 MW hydrogenerator is taken as the research object. The analytical method and numerical method are used to calculate the circulating current and circulation loss in the strands under different transposition conditions respectively. The comparison and analysis of these two methods can provide a more accurate calculation method for calculating the circulating current and circulation loss in the strands. Firstly, this paper briefly introduces the method of loop method and leakage inductance potential method to calculate the current loss of strand line, and uses the leakage inductance potential method to calculate the stator strand line when 360 full transposition is carried out. For less than 360 transposition at different transposition angles, the circulating current and circulation loss of the strands in the case of different length of the transposition section and the prolongation of the transposition of 360 are obtained. Secondly, the numerical method is used to calculate the circulating current and the circulation loss of the wire, and the total transposition of 360 is calculated by the numerical method. The circulating current and circulation loss of the three strands in the space and the length of the transposition section in the empty transposition section are 434mm and 434mm respectively in the case of less than 360 transposition and 360 empty transposition at the same time. Under different transposition angles, the circulating current and circulation loss of the under360 transposition at different lengths of the transposition section and the different positions of the empty transposition section in the slot are analyzed. Finally, the leakage inductance potential method and the numerical method are compared and analyzed, and the distributions of the slot magnetic field and the end leakage magnetic field around the strand line are obtained. Compared with the hypothesis distribution of slot leakage magnetic field and end leakage magnetic field in the leakage inductive potential method, the deficiency of analytical calculation method and the necessity and accuracy of numerical calculation method are explained.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM312

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 周登;水輪發(fā)電機(jī)定子股線環(huán)流研究[D];浙江大學(xué);2016年

本文編號：1637214