本文選題：水輪發(fā)電機(jī)　切入點(diǎn)：換位　出處：《電工技術(shù)學(xué)報(bào)》2017年17期 　論文類(lèi)型：期刊論文

【摘要】：針對(duì)大型水輪發(fā)電機(jī)定子繞組換位線棒股線電流及環(huán)流損耗的計(jì)算問(wèn)題,提出了一種解析計(jì)算方法——改進(jìn)漏感電動(dòng)勢(shì)法,解決了現(xiàn)有計(jì)算定子換位線棒股線電流分布及環(huán)流損耗的漏感電動(dòng)勢(shì)法(又稱(chēng)漏感電勢(shì)法)中存在的漏磁場(chǎng)假設(shè)不合理、電路約束不完整以及忽略了股線的實(shí)際換位路徑等問(wèn)題。將定子線棒中的每根股線看成由股線電阻和漏感電動(dòng)勢(shì)組成,分別給出了槽部漏感電動(dòng)勢(shì)和端部漏感電動(dòng)勢(shì)的計(jì)算方法。以一臺(tái)140 MW大型水輪發(fā)電機(jī)為例,采用改進(jìn)漏感電動(dòng)勢(shì)法計(jì)算360°全換位和不足換位時(shí)的每根股線的電流分布,進(jìn)而求解定子線棒的環(huán)流損耗。通過(guò)解析計(jì)算結(jié)果與實(shí)驗(yàn)測(cè)量結(jié)果對(duì)比表明,改進(jìn)漏感電動(dòng)勢(shì)法計(jì)算的電流分布及環(huán)流損耗值與實(shí)驗(yàn)測(cè)量值基本一致,驗(yàn)證了解析法的正確性。
[Abstract]:In order to solve the problem of current and circulation loss of rotor rod in stator winding of large hydrogenerator, an analytical method, improved leakage inductive electromotive force method, is put forward in this paper. The existing leakage inductive EMF method (also called leakage inductive EMF method), which is used to calculate the current distribution and circulation loss of stator transposition wire, is not reasonable. The circuit constraints are incomplete and the actual transposition path of the strands is neglected. Each strand line in the stator bar is regarded as consisting of the wire resistance and the leakage inductive electromotive force. The calculation methods of slot leakage electromotive force and end leakage inductive electromotive force are given respectively. Taking a 140MW large hydrogenerator as an example, an improved leakage inductive electromotive force method is used to calculate the current distribution of each strand of 360 擄full and insufficient transposition. By comparing the analytical results with the experimental results, it is shown that the current distribution and circulation loss calculated by the improved leakage inductive electromotive force method are in good agreement with the experimental measurements, which verifies the correctness of the analytical method.
【作者單位】： 哈爾濱理工大學(xué)電氣與電子工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51477038) 黑龍江省自然科學(xué)基金(E2015061)資助項(xiàng)目
【分類(lèi)號(hào)】：TM312

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本文編號(hào)：1647572