中国电力 ›› 2022, Vol. 55 ›› Issue (7): 152-162.DOI: 10.11930/j.issn.1004-9649.202110085

• 新能源 • 上一篇    下一篇

含高渗透率风电的配电网暂态电压量化评估方法

徐艳春1, 蒋伟俊1, 孙思涵1, MI Lu2   

  1. 1. 梯级水电站运行与控制湖北省重点实验室(三峡大学),湖北 宜昌 443002;
    2. 德克萨斯农工大学 电气与计算机工程学院,美国 德克萨斯州 卡城 77840
  • 收稿日期:2021-10-24 修回日期:2022-04-27 出版日期:2022-07-28 发布日期:2022-07-20
  • 作者简介:徐艳春(1973—),女,博士,副教授,从事分布式电源接入配电网时扰动信号检测、电力系统谐波检测以及电力系统电压稳定性与控制研究,E-mail:xyc7309@163.com;蒋伟俊(1998—),男,通信作者,硕士研究生,从事电力系统暂态电压稳定性研究,E-mail:980094945@qq.com
  • 基金资助:
    国家自然科学基金资助项目(51707102)。

Quantitative Assessment Method for Transient Voltage of Distribution Network with High-Penetration Wind Power

XU Yanchun1, JIANG Weijun1, SUN Sihan1, MI Lu2   

  1. 1. Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station (China Three Gorges University), Yichang 443002, China;
    2. Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77840, USA
  • Received:2021-10-24 Revised:2022-04-27 Online:2022-07-28 Published:2022-07-20
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.51707102).

摘要: 随着配电网中分布式风电渗透率的增加,评估影响电网暂态电压稳定性的各有关因素变得尤为重要,而评估暂态电压稳定性的现有指标在具有多暂态特性的场景下无法适用。首先介绍多二元表判据的评估思想,针对电压跌落情形,提出一种母线电压跌落安全裕度指标。其次,进一步构建母线过电压安全裕度指标,通过引入阶跃因子将两者指标有效结合,得到基于改进多二元表的母线暂态电压安全裕度指标。再次,提出区域暂态电压安全裕度指标来衡量某区域的暂态电压稳定性。最后,基于所提指标,利用Matlab/Simulink对含高渗透率风电的配电网进行仿真分析,在量化影响配电网暂态电压稳定性各因素的同时,验证了该指标的有效性和普适性。

关键词: 高渗透率风电, 配电网, 暂态电压稳定性, 改进多二元表, 暂态电压安全裕度指标, 量化评估

Abstract: With the further penetration of distributed wind power in the distribution network, assessing the factors affecting the transient voltage stability of the power grid becomes increasingly significant. However, the existing indexes for evaluating transient voltage stability are not applicable to scenarios with multiple transient characteristics. In this paper, the assessment idea of a multiple-two-element notation criterion is outlined. For voltage sag, a safety margin index of voltage sag of the bus is proposed. Next, a safety margin index of the overvoltage of the bus is further constructed. A step factor is introduced to combine the two indexes effectively into a safety margin index of the transient voltage of the bus based on an improved multiple-two-element notation. Then, a safety margin index of regional transient voltage is proposed to measure the transient voltage stability of a certain region. Finally, Matlab/Simulink is used to simulate the distribution network with high-penetration wind power according to the proposed indexes. The effectiveness and universality of the proposed indexes are verified while the factors affecting the transient voltage stability of the distribution network are quantified.

Key words: high-penetration wind power, distribution network, transient voltage stability, improved multiple-two-element notation, safety margin index of transient voltage, quantitative assessment