华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (10): 139-145.doi: 10.3969/j.issn.1000-565X.2011.10.024

• 动力与电气工程 • 上一篇    下一篇

计及分布式电源和负荷静态特性的最优低频减载

刘志鹏1 文福拴2,3 Gerard Ledwich3   

  1. 1.华南理工大学 电力学院,广东 广州 510640; 2.浙江大学 电气工程学院,浙江 杭州 310027;3.昆士兰科技大学 工程系统系,澳大利亚 布里斯班 4001
  • 收稿日期:2011-02-21 修回日期:2011-06-29 出版日期:2011-10-25 发布日期:2011-09-01
  • 通信作者: 刘志鹏(1983-) ,男,博士生,主要从事分布式发电和最优潮流研究. E-mail:zhipeng.liu09@ gmail.com
  • 作者简介:刘志鹏(1983-) ,男,博士生,主要从事分布式发电和最优潮流研究.
  • 基金资助:

    澳大利亚联邦科学与工业研究院智能电网研究项目

Optimal Under-Frequency Load Shedding Considering Distributed Generator and Load Static Characteristics

Liu Zhi-pengWen Fu-shuan2,3  Gerard Ledwich3   

  1. 1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China; 3. School of Engineering Systems,Queensland University of Technology,Brisbane 4001,Australia
  • Received:2011-02-21 Revised:2011-06-29 Online:2011-10-25 Published:2011-09-01
  • Contact: 刘志鹏(1983-) ,男,博士生,主要从事分布式发电和最优潮流研究. E-mail:zhipeng.liu09@ gmail.com
  • About author:刘志鹏(1983-) ,男,博士生,主要从事分布式发电和最优潮流研究.
  • Supported by:

    澳大利亚联邦科学与工业研究院智能电网研究项目

摘要: 低频减载被认为是当电力系统发生频率严重下降事故时所能采取的最后一项补救措施.针对配电系统中的低频减载问题,文中提出了计及分布式电源和负荷静态特性的最优低频减载策略.该策略以频率及频率变化率为执行依据,并由几个基本轮和一个特殊轮组成. 在基本轮中,按反馈控制律分轮次快速切除负荷,以保证频率摆脱紧急状态.而在特殊轮中,则优化分布式电源的出力和调整部分负荷,以保证频率恢复到安全状态并使系统运行参数最优.最后,以修改的IEEE 37 节点配电系统为例来验证所提出的最优低频减载策略的有效性.

关键词: 配电系统, 分布式电源, 低频减载, 基本轮, 特殊轮, 负荷静态特性

Abstract:

The under-frequency load shedding ( UFLS) is considered as the last effective remedial measure against a severe frequency decline of a power system.Aiming at this issue,an optimal UFLS strategy considering distributed generator ( DGs) and load static characteristics is proposed based on the frequency and its change rate. This strategy consists of several basic rounds and a special round. In the basic rounds,the system emergency can be alleviated by quickly shedding some loads runs by runs according to the feedback control law. In the special round,by optimizing the output power of DGs and adjusting some loads,the system security can be regained and the corresponding ope-rating parameters can be optimized. Finally,the effectiveness of the proposed optimal UFLS strategy is verified with the modified IEEE 37-node test feeder as an example.

Key words: distribution system, distributed generator, under-frequency load shedding, basic round, special round, load static characteristic

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