• 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 (4): 8-15.doi: 10.3969/j.issn.1000-7229.2015.04.002

• 理论研究 • 上一篇    下一篇

基于系统有功网损-风速灵敏度的双馈机风电场并网位置研究


李生虎,张维,汪秀龙   

  1. 合肥工业大学电气与自动化工程学院,合肥市 230009
  • 出版日期:2015-04-01
  • 作者简介:李生虎(1974),男,博士,教授,博士生导师,研究领域为电力系统规划与可靠性、风电系统分析与控制、柔性输电技术在电力系统中应用; 张维(1991),男,硕士研究生,研究方向为风电系统潮流控制和概率仿真; 汪秀龙(1993),男,硕士研究生,研究方向为直流输电系统运行与控制。
  • 基金资助:

    国家自然科学基金项目(51277049)

Integration Point of Doubly-Fed Induction Generator  Wind Farm Based on Active Power Loss and Wind Speed Sensitivity

LI Shenghu, ZHANG Wei, WANG Xiulong   

  1. School of Electrical Engineering and its Automation, Hefei University of Technology, Hefei 23009, China
  • Online:2015-04-01
  • Supported by:

    Project Supported by National Nature Science Foundation of China(51277049)

摘要:

关于风电并网对网损影响的分析,有助于风电系统安全经济运行,但是现有网损灵敏度指标,不能直接反映风速波动影响。在最大功率点跟踪(maximum power point tracking,MPPT)方式下,考虑双馈感应发电机(doubly-fed induction generator,DFIG)内部损耗时,有功出力与定子电压有关,在潮流求解前未知。基于并网DFIG潮流模型,拓展网损灵敏度算法,提出电网有功网损对风速的灵敏度模型,以反映有功网损受风速影响及趋势。量化DFIG不同无功控制方式对网损及风速灵敏度的影响。考虑风速概率区间分布,综合分析灵敏度结果对风电场选址和双馈感应风电机组无功控制方式的辅助参考价值。算例结果证明了所提灵敏度模型的可行性和正确性。

关键词: 有功网损, 灵敏度, 风速, 双馈感应电机(DFIG), 无功控制, 并网点

Abstract:

Research on the impact of wind power integration on transmission loss is beneficial to the safe and economic operation of wind power system. However, the existing sensitivity index of transmission loss cannot directly reflect the influence of wind speed fluctuation. Under the maximum power point tracking (MPPT) strategy, active power output of doubly-fed induction generator (DFIG) is dependent on the stator voltage, and unknown before power flow solution due to its power loss. Based on power flow model of DFIGs, transmission loss sensitivity model was extended to propose new model for the sensitivity of active power loss to wind speed, which could reflect the influence of wind speed on active power loss and its tendency. The influence of var control modes for DFIGs on transmission loss and wind speed sensitivity was quantified. With considering wind speed probability interval distribution, the auxiliary criterions of sensitivity results on the location of wind farm and the var control modes of DFIGs were compositely analyzed. The results validate the feasibility and accuracy of the proposed sensitivity model.

Key words: active power loss, sensitivity, wind speed, doubly-fed induction generator (DFIG), var control, integration point

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