中国电力 ›› 2025, Vol. 58 ›› Issue (3): 8-19.DOI: 10.11930/j.issn.1004-9649.202405101

• 高比例新能源接入电网的协调控制与优化运行 • 上一篇    下一篇

互联新能源电力系统区内AGC机组分布式协同控制策略

张磊1(), 马晓伟2(), 王满亮3(), 陈力2(), 高丙团3()   

  1. 1. 中国电力科学研究院有限公司,江苏 南京 210003
    2. 国家电网有限公司西北分部,陕西 西安 710048
    3. 东南大学 电气工程学院,江苏 南京 210096
  • 收稿日期:2024-05-27 出版日期:2025-03-28 发布日期:2025-03-26
  • 作者简介:
    张磊(1982),男,高级工程师(教授级),从事新能源并网控制技术研究,E-mail:zhang-lei3@epri.sgcc.com.cn
    马晓伟(1979),男,高级工程师(教授级),从事电力系统调度与运行控制技术研究,E-mail:maxw@nw.sgcc.com.cn
    王满亮(1999),男,博士研究生,从事新能源并网控制技术研究,E-mail:wangmanliang@seu.edu.cn
    陈力(1995),男,工程师,从事电力系统调度与运行控制技术研究,E-mail:1094502622@qq.com
    高丙团(1981),男,通信作者,教授,博士生导师,从事新能源并网控制、机器人与智能电力运维技术研究,E-mail:gaobingtuan@seu.edu.cn
  • 基金资助:
    国家电网有限公司科技项目(4000-20236084A-1-1-ZN)。

Distributed Collaborative Control Strategy for Intra-regional AGC Units in Interconnected Power System with Renewable Energy

Lei ZHANG1(), Xiaowei MA2(), Manliang WANG3(), Li CHEN2(), Bingtuan GAO3()   

  1. 1. China Electric Power Research Institute, Nanjing 210003, China
    2. Northwest Branch of State Grid Corporation of China, Xi'an 710048, China
    3. School of Electrical Engineering, Southeast University, Nanjing 210096, China
  • Received:2024-05-27 Online:2025-03-28 Published:2025-03-26
  • Supported by:
    This work is supported by Science and Technology Project of SGCC (No.4000-20236084A-1-1-ZN).

摘要:

区域电网中具备自动发电控制(automatic generation control,AGC)功能的新能源场站数量多并且不同调频机组的响应特性差异明显,加重了集中控制器的计算负担,影响区域电网频率控制效果。针对上述挑战,提出了一种基于机组动态模型和分布式一致性的互联电力系统区域内AGC机组协同控制策略,区域间根据联络线功率频率偏差进行跨区功率互济。首先,建立不同类型调频机组的调频响应功率模型。在此基础上,考虑调频控制的经济性,以有功出力变化量的二次成本函数最小为目标,兼顾各调频机组出力约束和功率平衡约束,构建功率动态分配优化模型,并证明通过合理的系数设定即可满足调频经济性最优,无须求解该优化问题。然后,提出了基于分布式一致性算法的AGC调频控制策略,实现区域内各参与机组AGC指令的整定。最后,以三区域互联电力系统为例进行仿真验证,结果表明:所提控制策略可以有效提高调频性能,降低机组的调频成本。

关键词: 区域互联电力系统, 新能源, 自动发电控制, 分布式协同控制, 调频经济性

Abstract:

In the regional power grid where a large number of renewable energy stations are equipped with automatic generation control (AGC) functionality, the response characteristics of different frequency regulation units vary significantly, which may aggravate the computation load of the centralized controller and affect the frequency control performance of the regional power system. In response to the above challenges, a collaborative control strategy for intra-regional AGC units in interconnected power system based on unit dynamic model and distributed consistency is proposed, while power interchange is dispatched across different regional power systems according to tie-line power flow and the bias of frequency. Firstly, the frequency response models for different types of frequency regulation units are established. Then, considering the frequency regulation economy, a power dynamic allocation optimization model is constructed, with the objective of minimizing the quadratic cost function of active power variation constrained by active power output and power balance. It is also proved that the objective of economic optimization for frequency regulation can be fulfilled by setting reasonable coefficients, without directly solving the optimization problem. Hence, an AGC frequency control strategy based on distributed consistency algorithm is proposed to determine the settings of intra-regional AGC commands. Finally, taking a three-area interconnected power system as an example, the results show that the proposed strategy can effectively improve frequency regulation performance and reduce the frequency regulation cost.

Key words: regional interconnected power system, renewable energy, automatic generation control, distributed collaborative control, frequency regulation economy