中国电力 ›› 2020, Vol. 53 ›› Issue (2): 137-141,149.doi: 10.11930/j.issn.1004-9649.201910033

• 发电 • 上一篇    下一篇

基于抑制电力系统低频振荡的火电机组控制方式优化

张宝1, 丁阳俊1, 顾正皓1, 应光耀1, 樊印龙2   

  1. 1. 国网浙江省电力有限公司电力科学研究院, 浙江 杭州 310014;
    2. 杭州意能电力技术有限公司, 浙江 杭州 310014
  • 收稿日期:2019-10-14 修回日期:2019-11-14 出版日期:2020-02-05 发布日期:2020-02-05
  • 作者简介:张宝(1978-),男,硕士,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
  • 基金资助:
    国网浙江省电力有限公司科技项目(5211DS15002D)

Optimization on the Control Mode of Thermal Power Unit to Suppress Low Frequency Oscillation of Power System

ZHANG Bao1, DING Yangjun1, GU Zhenghao1, YING Guangyao1, FAN Yinlong2   

  1. 1. Zhejiang Electric Power Research Institute of State Grid Corporation, Hangzhou 310014, China;
    2. E. Energy Technology Co., Ltd., Hangzhou 310014, China
  • Received:2019-10-14 Revised:2019-11-14 Online:2020-02-05 Published:2020-02-05
  • Supported by:
    This work is supported by the Science and Technology Project of State Grid Zhejiang Electric Power Co., Ltd. (No.5211DS15002D)

摘要: 电力系统低频振荡事件的发生有一定的随机性,目前火电机组热工控制方式不能有效抑制低频振荡。结合两个具体案例,分析火电机组参与低频振荡的过程,总结得到共同点;基于振荡期间汽轮机转速信号与电网频率信号的显著差异这一特点,提出了可抑制强迫振荡的火电机组控制方式优化方法,并建议使用电网频率信号代替转速信号用于一次调频回路。

关键词: 汽轮机, 低频振荡, 调速系统, 一次调频, 协调控制

Abstract: Due to the randomness of its occurrence in power system, currently there is no effective way to suppress the low frequency oscillations through the existing thermal control modes of generation units. Based on the two specific study cases, this paper analyzes the process of thermal power units participating in low-frequency oscillation and then summarizes them in common. Arising from the observation of significant discrepancies between the turbine speed signal and the power grid frequency signal during the oscillation, an optimization method is proposed to suppress the forced oscillation by virtue of the control mode of thermal power unit. Additionally, it is suggested to replace the speed signal with the power grid frequency signal for the primary frequency modulation.

Key words: steam turbine, low frequency oscillation, turbine governor, primary frequency modulation, coordinated control