| 引用本文: | 刘皓明,唐俏俏,朱凌志,等.双馈型风电场参与电压无功调节的分层控制方案[J].电力系统保护与控制,2014,42(24):79-85.[点击复制] |
| LIU Hao-ming,TANG Qiao-qiao,ZHU Ling-zhi,et al.Hierarchical control strategy of voltage and reactive power for DFIG wind farm[J].Power System Protection and Control,2014,42(24):79-85[点击复制] |
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| 摘要: |
| 针对弱联接风电场并网点电压波动问题，通过对双馈风电机组功率关系分析，以及电机定子、网侧换流器功率极限的推导，在传统的无功控制方案的基础上，提出了一种在电压跌落时机组发出无功以稳定电压的无功控制模式。可以根据电网电压波动情况，选择参与无功控制机组数量，充分发挥双馈风电场的无功能力，减少使用率不高的无功补偿装置的投资。基于PSCAD/EMTDC平台搭建风电场接入电网仿真系统，仿真结果验证了所提控制方案的有效性。 |
| 关键词: 双馈电机 功率极限 无功控制 电压调节 分层控制 |
| DOI：10.7667/j.issn.1674-3415.2014.24.013 |
| 投稿时间：2014-03-15修订日期：2014-04-25 |
| 基金项目:国家863高技术基金项目（2013AA050601） |
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| Hierarchical control strategy of voltage and reactive power for DFIG wind farm |
| LIU Hao-ming,TANG Qiao-qiao,ZHU Ling-zhi,ZHAO Da-wei,LI Chen-chen,SHI Lei |
| (College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China;China Electric Power Research Institute, Nanjing 210003, China;NARI Technology Development Limited Company, Nanjing 210061, China) |
| Abstract: |
| Considering the problems of voltage fluctuations of weak connection wind farm, through the analysis of DFIG’s power flow and derivation of the stator and grid-side converter’s power limitation, the paper proposes a reactive power hierarchical control strategy that compensates reactive in priority when voltage drop, based on traditional reactive power control modes. The reactive power hierarchical control strategy chooses appropriate DFIG units according to the level of voltage fluctuations. That takes advantage of capability of DFIG reactive power, and saves the investment of the low-frequency reactive compensation device. Finally, the simulation model of small scale wind farm connecting to gird is built based on PSCAD/EMTDC simulation platform, the results prove that the proposed control strategy is effective. |
| Key words: DFIG power limitation reactive power control voltage regulation hierarchical control strategy |
