中国电力 ›› 2017, Vol. 50 ›› Issue (10): 120-123.DOI: 10.11930/j.issn.1004-9649.201703014

• 发电 • 上一篇    下一篇

电力系统低频振荡对汽轮机组运行安全性的影响

张宝1, 樊印龙1, 印旭洋2, 胡洲1, 顾正皓1   

  1. 1. 国网浙江省电力公司电力科学研究院,浙江 杭州 310014;
    2. 神华浙江国华浙能发电有限公司,浙江 宁海 315612
  • 收稿日期:2017-03-20 出版日期:2017-10-25 发布日期:2017-10-30
  • 作者简介:张宝(1978—),男,安徽界首人,高级工程师,从事汽轮机节能与控制技术相关工作。E-mail: ah_zb@126.com

Effect of Low Frequency Oscillation of Power System on Operation Safety of Steam Turbine Unit

ZHANG Bao1, FAN Yinlong1, YIN Xuyang2, HU Zhou1, GU Zhenghao1   

  1. 1. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China;
    2. Shenhua Zhejiang Guohua Zheneng Group Power Plant Co., Ltd., Ninghai 315612, China
  • Received:2017-03-20 Online:2017-10-25 Published:2017-10-30

摘要: 电力系统低频振荡事件在国内已发生了多起,严重地威胁着汽轮机组的安全运行。结合具体案例,分析了汽轮机组在电力系统低频振荡期间的不同反应,指出电力系统低频振荡主要通过转速测量值与汽轮机调节阀开度大幅晃动2个途径来威胁机组安全运行;通过实际测试,发现了某机组在低频振荡发生时控制油压力会持续下降。结合国内实际情况,建议采取措施,提高控制油系统的抗干扰能力,并做好事故控制预案。

关键词: 汽轮机, 电力系统, 低频振荡, 调速系统, 转速, 调节阀

Abstract: The low frequency oscillation of the power system has occurred many times in China, which endangers the safe operation of the steam turbines. Based on the specific cases, the different reactions of the steam turbines during the low frequency oscillations of the power system are analyzed. It is pointed out that the low frequency oscillation of the power system is threatening the safe operation of the unit in two ways. One is the speed measurement and the other is the turbine valve opening fluctuation. Through the actual testing, it is observed that the control oil pressure of a unit declines continuously when the low frequency oscillation occurs. Taking China’s situations into account, it is suggested that measures should be taken to improve the anti-interference ability of the control oil system, and contingency plans should be made.

Key words: steam turbine, power system, low frequency oscillation, turbine governor, speed, regulating valve

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