中国电力 ›› 2014, Vol. 47 ›› Issue (2): 18-22.DOI: 10.11930/j.issn.1004-9649.2014.2.18.4

• 热工自动化专栏 • 上一篇    下一篇

火电厂给煤机低电压穿越探讨

岳建华1, 毕春海1, 岳涛2   

  1. 1. 神华国华(北京)电力研究院有限公司,北京 100025;
    2. 华北电力科学研究院有限责任公司,北京 100045
  • 收稿日期:2013-10-14 出版日期:2014-02-28 发布日期:2015-12-18
  • 作者简介:岳建华(1961-),男,河北张家口人,高级工程师,从事电站电气和热控控制系统的研究和技术支持工作及高压变频器在电站应用方面的研究。E-mail: yanjiaoyjh@vip.sina.com

Exploration on LVRT of Coal Feeder in Thermal Power Plants

YUE Jian-hua1, BI Chun-hai1, YUE Tao2   

  1. 1. Shenhua Guohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100025, China;
    2. North China Electric Power Research Institute Co., Ltd., Beijing 100045, China
  • Received:2013-10-14 Online:2014-02-28 Published:2015-12-18

摘要: 针对电网或厂用电电压瞬间失去造成由给煤机全部停运导致机组停运的事件,分析出造成给煤机停止运行的原因有2个方面,即当给煤机控制电源电压低于310 V或者给煤机动力电源电压低于210 V时均发生给煤机停止运行直至造成机组停机事件;提出了提高给煤机供电系统可靠性和采用有效的控制策略的解决方案。通过比较,推荐采用修改热工控制策略的方案。

关键词: 低电压穿越, 给煤机, 控制策略

Abstract: The paper discusses the generator shutdown events caused by coal feeder outage in instant power-off. The coal feeder outage happens either when the power supply voltage of coal feeder control circuit is lower than 310 V, or when the power voltage of coal feeder itself is below 210 V. Once the coal feeders are triggered off, the generating units are forced to stop running. Therefore, two solutions including improving the reliability of the power supply and modifying the control logics are proposed. The latter is recommended through comparison.

Key words: low voltage ride-through (LVRT), coal feeder, control strategy

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