发电技术 ›› 2024, Vol. 45 ›› Issue (2): 273-281.DOI: 10.12096/j.2096-4528.pgt.22172

• 双碳背景下灵活性发电技术 • 上一篇    下一篇

考虑概率分布的分布式光伏无功下垂控制策略

钱乙卫1, 田浩2, 刘财华2, 田昕泽3, 周霞3, 戴剑丰3   

  1. 1.国网陕西省电力有限公司,陕西省 西安市 710048
    2.国电南瑞南京控制系统有限公司,江苏省 南京市 211000
    3.南京邮电大学自动化学院、人工智能学院,江苏省 南京市 210023
  • 收稿日期:2023-04-22 出版日期:2024-04-30 发布日期:2024-04-29
  • 通讯作者: 周霞
  • 作者简介:钱乙卫(1971),男,高级工程师,研究方向为电力调度及电力系统安全稳定运行分析,22037235@qq.com
    周霞(1978),女,博士,副教授,从事电力通信、电力系统分析与控制研究,本文通信作者,zhouxia@njupt.edu.cn
  • 基金资助:
    国家自然科学基金项目(61933005)

Droop Control Strategy of Distributed Photovoltaic Reactive Power Considering Probability Distribution

Yiwei QIAN1, Hao TIAN2, Caihua LIU2, Xinze TIAN3, Xia ZHOU3, Jianfeng DAI3   

  1. 1.State Grid Shaanxi Electric Power Co. , Ltd. , Xi’an 710048, Shaanxi Province, China
    2.NARI Nanjing Control System Co. , Ltd. , Nanjing 211000, Jiangsu Province, China
    3.College of Automation & College of Artificial Intelligence, Nanjing University of Posts and Telecommunications, Nanjing 210023, Jiangsu Province, China
  • Received:2023-04-22 Published:2024-04-30 Online:2024-04-29
  • Contact: Xia ZHOU
  • Supported by:
    National Nature Science Foundation of China(61933005)

摘要:

分布式光伏接入配电网逐渐成为趋势,然而大规模分布式光伏并网将引起严重的潮流逆向,导致电压越限和网损增加。针对分布式光伏接入配电网产生的电压越限问题,提出一种考虑概率分布的分布式光伏无功下垂控制策略,首先,考虑光伏出力的概率分布对光伏电站不同光伏单元当前有功功率的影响,评估计算每个光伏逆变器的可用无功容量;然后,根据各光伏单元当前可用无功容量大小对无功下垂系数进行调整,在不牺牲有功功率的情况下最大限度地利用光伏电站的无功支撑能力;最后,通过PSCAD/EMTDC仿真软件,验证了所提控制策略的有效性。

关键词: 分布式光伏, 电压越限, 光伏概率分布, 无功电压控制, 下垂控制

Abstract:

Distributed photovoltaic access to the distribution network has gradually become a trend, but the large-scale distributed photovoltaic grid connection will cause serious power flow reversal, resulting in out-of-limit voltage and network loss increase. Aiming at the out-of-limit voltage problem generated by distributed photovoltaic access to distribution network, a distributed photovoltaic reactive power droop control strategy considering the probability distribution was proposed. Firstly, the influence of probability distribution of photovoltaic output on the current active power of different photovoltaic units of photovoltaic power plants was considered, and the available reactive capacity of each photovoltaic inverter was evaluated and calculated. Then, the reactive power droop coefficient was adjusted according to the current available reactive capacity of each photovoltaic unit, and the reactive power support capacity of the photovoltaic power station was maximized without sacrificing active power. Finally, the effectiveness of the proposed control strategy was verified by PSCAD/EMTDC simulation software.

Key words: distributed photovoltaic, out-of-limit voltage, photovoltaic probability distribution, reactive power and voltage control, droop control

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