汽轮发电机转子阻尼系统对第一摆稳定性影响的仿真计算研究

发布时间：2018-04-23 07:29

本文选题：汽轮发电机 + 第一摆稳定性　；参考：《中国电机工程学报》2015年01期

【摘要】：发电机的第一摆稳定性是准确评估系统最大传输功率的重要指标。对汽轮发电机本体而言,影响第一摆稳定性的因素主要有励磁系统,以及转子大齿导条、转子铁心和转子导电槽楔构成的阻尼系统。为了揭示上述因素与第一摆稳定极限的关系,该文以300 MW汽轮发电机为例,采用时步有限元模型研究了上述两种因素对发电机第一摆稳定极限的影响。结果表明:转子阻尼系统对发电机第一摆稳定极限的影响较大;由于转子导电槽楔通常由铝合金、不锈钢等材料构成,这些材料的电导率相差较大,因而进一步研究了转子槽楔电导率与第一摆稳定极限的关系,得出当电导率从σal(铝合金电导率)到0.05σal变化时,发电机的第一摆稳定极限逐渐增大。
[Abstract]:The first pendulum stability of generator is an important index to accurately evaluate the maximum transmission power of the system. The main factors affecting the stability of the first pendulum are the excitation system, the damping system composed of the rotor teeth guide bar, the rotor core and the rotor conductive slot wedge. In order to reveal the relationship between the above factors and the stability limit of the first pendulum, the influence of the above two factors on the stability limit of the first pendulum of the generator is studied by using the time-step finite element model with a 300MW turbogenerator as an example. The results show that the rotor damping system has a great influence on the stability limit of the first pendulum of the generator. The relationship between rotor slot wedge conductivity and the stability limit of the first pendulum is further studied. It is concluded that when the conductivity varies from 蟽 alto 0.05 蟽 al, the stability limit of the first pendulum increases gradually.
【作者单位】：华北电力大学电气与电子工程学院;北京交通大学电气工程学院;
【基金】：“十一五”国家科技支撑项目(2008BAA13B02) 国家自然科学基金项目(51307049)~~
【分类号】：TM311

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