火电厂励磁系统主、备励切换可靠性的改造

华电技术 ›› 2011, Vol. 33 ›› Issue (8): 32-33.

火电厂励磁系统主、备励切换可靠性的改造

程威1，史运峰2

1.广州珠江电厂，广东广州511457； 2.广州艾博电力设计院公司，广东广州510080

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-08-25 发布日期:2011-08-25

Improvement of reliability of switching over operation between main and standby excitation systems of thermal power plant

CHENG Wei1, SHI Yunfeng2

.Guangzhou Zhujiang Power Plant, Guangzhou 511457, China; 2. Guangzhou A&B Electric Power Engineering Consultant Company Limited, Guangzhou 510080, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-08-25 Published:2011-08-25

摘要/Abstract

摘要： 针对广州某火电厂励磁系统在主、备励切换过程中出现的无功波动大、机组发生失磁事故的问题，对并列可控硅整流、二极管整流的换流过程和备用励磁系统调压装置的机械特性进行了分析，提出了提高励磁系统主、备励切换可靠性的措施，有效地提高了励磁系统主备励切换的可靠性。

关键词: 励磁系统, 主励, 备励, AVR, 可控硅整流, 二极管整流

Abstract: In the switching over operation process between main and stand by excitation systems of a thermal power plant in Guangzhou, the reactive power fluctuated greatly, and the excitationloss accident of the unit was happened. Aiming at the above problems, the current switching process of parallel silicon controlled rectification and diode rectification was analyzed, and the mechanical characteristics of the voltage regulating device of the standby excitation system were analyzed too. The measures to increase the reliability of switching over operation between main and standby excitation systems were put forward, and the reliability of switching over operation between main and standby excitation systems was increased effectively.

Key words: excitation system, main excitation, standby excitation, automatic voltage regulator (AVR), silicon controlled rectification, diode rectification

程威;史运峰. 火电厂励磁系统主、备励切换可靠性的改造[J]. 华电技术, 2011, 33(8): 32-33.

CHENG Wei;SHI Yunfeng. Improvement of reliability of switching over operation between main and standby excitation systems of thermal power plant[J]. Huadian Technology, 2011, 33(8): 32-33.

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