在DFIG风力轮机中用于LVRT增强的混合预测启用自适应的Crowbar协调
Xianlong Su1,2, Hankil Kim3, Changsu Kim1
1Department of Computer Science and Engineering, Pai Chai University, 155-40 Baejae-ro, Daejeon 35345, Republic of Korea.
Entropy (Basel, Switzerland)
|February 27, 2026
概括
本研究介绍了一种混合预测策略,以改善双输电感应发电机 (DFIG) 风力轮机的低压通行 (LVRT). 适应式横杆协调可提高电网稳定性和电压下降期间的性能.
科学领域:
- 电气工程 电气工程
- 可再生能源系统可再生能源系统
- 控制系统 控制系统
背景情况:
- 双电感应发电机 (DFIG) 对于风能集成至关重要.
- 低压通行 (LVRT) 对于电网在电压干扰期间的稳定性至关重要.
- 现有的DFIG的LVRT策略在适应性控制和性能优化方面面临挑战.
研究的目的:
- 为提高DFIG LVRT性能,提出一个支持混合预测的自适应杆协调策略.
- 为DFIGs开发一个统一的电机模型,并明确 LVRT 约束.
- 在电压下降期间改善DFIG的电网友好和安全边缘.
主要方法:
- 在MATLAB/Simulink中开发了一个统一的电机 DFIG 模型.
- 一个基于CEEMDAN的混合预测管道 (Informer-LSTM和XGBoost) 被实施.
- 制定了LVRT约束来确定一个最佳的横杆阻力范围 (0.4-0.8 p.u. ) 的情况.
- 预测的功率,坡道速率和不确定性被映射为适应杆控制的风险指数.
主要成果:
- 混合预测者在预测准确性方面表现优于五个基线 (MSE,RMSE,MAE,R2).
- 适应性策略将直流连接电压限制在深度放松场景中±3%的标值内.
- 重新同步时间从0.35秒缩短到0.15秒.
- 转子电流峰值下降了约5.1%,反应功率支持增加到1.7 Mvar.
结论:
- 拟议的混合预测启用自适应杆策略显著提高了DFIG LVRT的性能.
- 该战略提高了安全边际和电网友好性,而不需要硬件修改.
- 这种方法为DFIG集成到电网中面临电压干扰提供了强大的解决方案.
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