改进漏感电动势法计算换位线棒股线电流及环流损耗

发布时间：2018-03-22 07:09

本文选题：水轮发电机　切入点：换位　出处：《电工技术学报》2017年17期 　论文类型：期刊论文

【摘要】：针对大型水轮发电机定子绕组换位线棒股线电流及环流损耗的计算问题,提出了一种解析计算方法——改进漏感电动势法,解决了现有计算定子换位线棒股线电流分布及环流损耗的漏感电动势法(又称漏感电势法)中存在的漏磁场假设不合理、电路约束不完整以及忽略了股线的实际换位路径等问题。将定子线棒中的每根股线看成由股线电阻和漏感电动势组成,分别给出了槽部漏感电动势和端部漏感电动势的计算方法。以一台140 MW大型水轮发电机为例,采用改进漏感电动势法计算360°全换位和不足换位时的每根股线的电流分布,进而求解定子线棒的环流损耗。通过解析计算结果与实验测量结果对比表明,改进漏感电动势法计算的电流分布及环流损耗值与实验测量值基本一致,验证了解析法的正确性。
[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 掳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.
【作者单位】：哈尔滨理工大学电气与电子工程学院;
【基金】：国家自然科学基金(51477038) 黑龙江省自然科学基金(E2015061)资助项目
【分类号】：TM312

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