中国电力 ›› 2020, Vol. 53 ›› Issue (1): 155-161.DOI: 10.11930/j.issn.1004-9649.201811059

• 发电 • 上一篇    下一篇

新能源大规模并网条件下火电机组深度调峰控制策略优化

李玲1,2, 刘鑫屏1   

  1. 1. 华北电力大学 控制与计算机工程学院, 河北 保定 071003;
    2. 上海电力大学 自动化工程学院, 上海 200090
  • 收稿日期:2018-11-05 修回日期:2019-05-20 发布日期:2020-01-15
  • 作者简介:李玲(1977-),女,博士研究生,讲师,从事火电机组热工过程智能预测控制研究,E-mail:lily_0505@sina.com;刘鑫屏(1975-),女,博士,副教授,从事大机组智能优化控制、新能源规模化并网条件下的火电机组深度调峰技术研究,E-mail:lxp@ncepu.edu.cn
  • 基金资助:
    国家重点研发计划资助项目(2017YFB0902100)

Control Strategy Optimization for Thermal Power Unit Adapted to Deep Peak Shaving for Large-Scale New Energy Source Integration

LI Ling1,2, LIU Xinping1   

  1. 1. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China;
    2. Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
  • Received:2018-11-05 Revised:2019-05-20 Published:2020-01-15
  • Supported by:
    This work is supported by National Key R& D Program of China (No.2017YFB0902100).

摘要: 火电机组深度调峰运行是消除电源侧与电网侧双随机扰动、提高可再生能源消纳率的有效措施,为此机组协调控制系统也需要进行改进,保证在大范围变工况运行时发电负荷-机前压力的控制品质。针对典型亚临界机组简化非线性动态模型,通过机理分析确定机组由额定负荷向深调峰负荷变化时模型中主要参数的变化规律,再将经典PID参数整定方法同仿真分析相结合,得到主要工况点协调控制系统最优参数,并提出适应工况变化的变参数控制逻辑。将此方法应用到某330 MW机组深调峰改造中,优化后的协调控制系统可在33%~100%负荷范围内投入,并具有良好的控制品质。

关键词: 深度调峰, 控制策略, 优化, 变参数, 仿真

Abstract: Deep peak-shaving operation of thermal power unit provides an effective path to eliminate the stochastic disturbance on both power source side and transmission grid side, as well as to boost the renewable energy consumption rate. Meanwhile, the coordination control system of units also needs to be improved to ensure the control quality of power generation load-throttle pressure under the large variation of operation conditions. On the basis of simplified nonlinear dynamic model for typical subcritical units, the variation rule for the main parameters during the load shift process from rated load to deep peak shaving load is determined through the analysis on the basic principles. Then by combining classical PID parameter tuning method with simulation analysis, the optimal parameters of the coordination control system under main operation conditions are obtained and the control logic with variable parameters adapted to operation condition changes is proposed. The application of this method on deep peak adjustment retrofit has been implemented in a 330 MW unit. The optimized coordination control system can be automatically put into service within 33%~100% load range and good control quality is also achieved.

Key words: deep peak shaving, control strategy, optimization, variable parameter, simulation