• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2015, Vol. 36 ›› Issue (5): 14-19.doi: 10.3969/j.issn.1000-7229.2015.05.003

• 理论研究 • 上一篇    下一篇

考虑抑制DFIG机群脱网的风电场无功补偿配置新方法

马瑞1,王柯懿2,吴刚3   

  1. 1.长沙理工大学电气与信息工程学院,长沙市 410076;2.湖南省交通规划勘察设计院,长沙市 410008;3.国家电网吉林省电力有限公司,长春市 130021
  • 出版日期:2015-05-01
  • 作者简介:马瑞(1971),男,博士,教授,通信作者,主要研究方向为新能源接入电力系统安全分析、低碳电力、电力大数据; 王柯懿(1989),女,硕士研究生,主要研究方向为电力系统分析与控制; 吴刚(1976),男,硕士,高级工程师,从事电网调度运行及电网规划工作。
  • 基金资助:

    国家自然科学基金项目(51277015)

A Novel Reactive Power Compensation Configuration of  Wind Farms on Inhibiting DFIG Fleet Off-Grid

MA Rui1, WANG Keyi2, WU Gang3   

  1. 1. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410076, China; 2.Hunan Communications Planning Survey and Design Institute, Changsha 410008, China;3. State Grid Jilin Electric Power Co., Ltd., Changchun 130021, China
  • Online:2015-05-01
  • Supported by:

    Project Supported by National Natural Science Foundation of China(51277015).

摘要:

随着大规模风电并网,电网故障情况下风电机群连锁脱网事故严重威胁电网安全稳定运行。为此,从抑制DFIG机群脱网的角度,提出了一种考虑抑制双馈异步风力发电机(doubly-fed induction generator,DFIG)机群脱网的风电场无功补偿配置新方法。该方法首先以风电场为中心进行无功平衡初步分析,通过无功需求和有功传输之间的定量关系,确定风电场所需要配置的低压电抗器组和低压电容器组容量。然后通过不同负荷方式下风电出力波动和线路N-1运行时的风电场母线电压无功分析,校核初步配置方案对系统静态安全的适应能力。最后,在分析电网故障情况下DFIG机群无功需求特征基础上,通过加入一定容量的静止同步补偿器(static synchronous compensator,STATCOM)来抑制机群脱网,从而使无功补偿方案能满足系统安全运行的要求。该方法已应用到了某省网大容量风电接入220  kV的无功配置专题研究中,在经济和技术上是可行的和有效的。

关键词: 无功补偿, 风电场, 电网故障, 电容器组, STATCOM

Abstract:

Along with the increasing scale of wind power, the electric grid stability and safety problems in wind farms have become increasingly prominent due to the DFIG (doubly-fed induction generator) fleet off-grid under grid failure conditions. In order to inhibit DFIG fleet off-grid, this paper presented a wind farm reactive power compensation configuration method with considering the inhibition of DFIG. Firstly, the wind farms were taken as the center to analyze the reactive power balance. Using the quantitative relationship between reactive power demand and active transport, this paper calculated the needed capacity of low-voltage reactor bank and low-voltage capacitor bank in wind farm. Secondly, through the reactive analysis on the fluctuation of wind power output under different load modes and the bus voltage of wind farm during N-1 line running, this paper checked the adaptability of initial configuration scheme to the systems static security. Finally, based on the analysis on the reactive power demand characteristics of DFIG fleet under grid failure condition, this paper added a STATCOM (static synchronous compensator) with certain capacity to inhibit the fleet off-grid, which could make the reactive power compensation scheme meet the safe operation requirements of the system. The proposed method has been used to configure the reactive power compensation in 220 kV wind farm with large capacity in a province, which can prove its feasibility and effectiveness in economy and technology.

Key words: reactive power compensation, wind farm, power grid fault, capacitor bank, STATCOM

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