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大溪河电站位于重庆乌江支流大溪河流域,装有2台30MW的混流式水轮发电机组。机组于2001年6月全部竣工并网发电。该电站水轮发电机型号为SF30—12/3520,发电机采用具有上下两个导轴承的立轴悬式机构,推力轴承置于上导轴承的油槽内。励磁方式为自并励静止可控励磁,额定励磁电流680A。发电机额定转速500r/min。 相似文献
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马士东 《安徽电力科技信息》2009,(3):1-3
某发电厂一期工程安装2×600MW超临界燃煤汽轮发电机组,发电机系上海汽轮发电机有限公司制造的QFSN-600—2型水氢氢交流同步发电机。定子绕组为直接水内冷,定、转子铁心及转子绕组为氢气冷却,采用双流环式密封瓦结构。其1号汽轮发电机密封油系统由空侧和氢侧2个各自独立又互有联系的油路组成,分别将油供给轴密封瓦上的2个环状配油槽,油沿转轴轴向穿过密封瓦内径与转轴之间的间隙流出。空侧密封油压力的控制依靠压差阀的泄油来控制,当发电机内氢气压力变化或空侧密封油压力波动时, 相似文献
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结合近年来电厂水轮发电机出现的油雾问题,分析了其危害及产生的原因,提出了防止油槽外甩油、内甩油结构、稳定油槽液面结构及合理油路设计原则,这些措施的应用成功地解决了电站的甩油及油雾问题。 相似文献
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某水电站机组增容扩机后,由于上导甩油和产生的油雾与励磁碳刷粉混合进入增容发电机内,造成增容发电机转子绝缘下降,通过对上导油盆盖的技术改造解决甩油、油雾的问题,从而解决增容发电机转子绝缘下降的处理方法。 相似文献
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以太原钢铁(集团)有限公司太钢自备电厂点火及助燃油管道布置情况及燃油主要系统为例,根据燃油系统在电厂的布置,优化设计了燃油泵房、油罐区、锅炉房油管道和厂区油管道布置,分析了卸油系统、供油系统、污油水处理系统、油罐区系统、锅炉房燃油系统、厂区燃油及压缩空气系统等,实践证明,安全可靠,布置合理. 相似文献
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介绍一套基于Windows95的电流互感器自动设计与计算软件,其其主要功能包括绕组设计、高压套管设计、油箱误差计算及电场计算等。 相似文献
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Chang-Su Huh Jung-II Jeong 《Dielectrics and Electrical Insulation, IEEE Transactions on》1998,5(2):199-203
Streaming electrification under dc and ac electric fields was investigated by using test pipes and oil circulation apparatus. We used two different test pipes, one made of pressboard, and the other of insulating paper. At first, the amount of static charges which flowed into the test pipes was measured without electric field. For the experiment using an insulating paper pipe, when the oil temperature increased, the measured current curve shows a peak. When the velocity increased, the current increased proportionally from the 2nd to 4th power of velocity. For the experiment using a pressboard pipe, the current increased proportionally from the 3rd to 5th power of temperature, and by the 1st power of velocity. Then, we applied ac and dc electric fields on the test pipes and the current from a relaxation tank to ground was measured. The ions in oil carry the charges, so an electric field affects ions in the oil. It makes the mathematical approach to streaming electrification difficult. We know that as the electric field intensity increased, the current due to selective adsorption of the test pipe was increased. The current vs. velocity curve under ac electric field had a peak point in velocity 相似文献
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对于低水头大容量轴流转桨式机组,在常规设计中通常以设置事故油罐的方式来防止调速器压力油罐失压时导致的机组飞逸。文章首先从设置事故油罐的必要性,分析事故油罐在防飞逸措施中所起的作用,并说明设置该装置的优势及弊端,进而从技术上论证替代事故油罐的有效措施,并最终选用设置直流事故油泵代替事故压力油罐。 相似文献
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The photovoltaic power system has a great future as a clean-energy alternative to fossil fuel which has many environmental problems such as gas exhaustion or air pollution. Sunlight, a source of energy for the system, is influenced greatly by weather conditions, seasons and times of day. Therefore it cannot supply constant electric power. The photovoltaic/fuel cell power hybrid system is assumed. It combines PV array, hydrogen generator, storage tank and fuel cells by using hydrogen. This system can supply constant electric power to the electric load in a solitary island separated from a commercial electric network. The possibility of this system is examined by computer simulation. Input data include the global irradiance on inclined plane and temperature of HASP data of Tokyo, ten kinds of electrical load forms with 400 MWh electric power a year, and conversion efficiencies of each subsystem. As a result of simulation, it was revealed that the area of PV array with 8170 m2 and the volume of hydrogen tank from 22 × 103 to 30 × 103 kl are necessary. 相似文献