变压器散热计算方法的研究

来源 :河南科技 | 被引量 : 0次 | 上传用户:xiaobudian1980
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
【正】随着既有铁路的大面积提速,牵引负荷随之增加,变压器正常情况下负荷率增大,变压器所产生的热量能否散发掉,是决定温升限值是否超标的一个因素。在本文中,笔者从变压器发热和散热的角度进行探讨。一、计算思路变压器计算容量可以从绕组温升考虑,通过变压器负荷曲线确定一天内变压器各阶段温升,通过IEC354-1991油浸式电力变压器
其他文献
提升文化软实力是我国发展的战略目标之一。研究文化软实力和高校文化软实力,先要对文化的定义进行理解和分析;要从多视角来分析文化软实力这18种“力”是各种各样“力”的有机
AIM: To elucidate the mechanism(s) by which S-adenosyl-L-methionine(SAM) decreases hepatitis C virus(HCV) expression.METHODS: We examined the effects of SAM on
AIM: To investigate estrogen receptors expression in duodenal familial adenomatous polyposis(FAP) and any relationship with epithelial proliferation/apoptosis m
Nearly 2.5% of cross-sectional imaging studies willreport a finding of a cystic pancreatic lesion. Even though most of these are incidental findings, it remains
Hepatitis C virus (HCV) is endemic in Pakistan andits burden is expected to increase in coming decadesowing mainly to widespread use of unsafe medicalprocedures.
AIM: To compare the short- and long-term outcomes of laparoscopic and robotic surgery for middle and low rectal cancer.METHODS: This is a retrospective study on
3月24日,中国港湾与缅甸港务局在缅甸签署仰光外海引航站项目合同,项目总造价约为2000万美元。
AIM: To investigate the regulatory effect of Vδ1 T cells and the antitumor activity of Vδ2 T cells in rectal cancer.METHODS: Peripheral blood, tumor tissues a
江总书记在北戴河"八七"讲话中,对哲学社会科学的重要性,对加强社科研究、促其发展,对社科人才的培养等内容作了精辟的理论阐述.作为哲学社会科学工作者,我极为振奋并深受鼓
Compressed air has been generally used since the beginning of the 20 th century for various applications. However, rupture of the colon caused by compressed air