摘要
提出了一种改善双馈风电场并网系统动态稳定性的控制策略。系统的振荡能量和暂态能量具有一致性,消耗振荡能量的元件能够加速系统不平衡能量的衰减,具有正阻尼。以此为基础,研究了以消耗振荡能量为目标的双馈风电场动态稳定控制方法,并讨论了机组运行极限对控制效果的影响,分析了风电场无功补偿的必要性。控制策略利用双馈风电机组快速有功、无功调节特性,暂存系统不平衡能量,并为系统提供无功补偿,改善系统的动态响应,提高系统稳定性。在Dig SILENT/Power Factory中进行了仿真分析,验证了所提出控制策略的有效性及其对电网稳定性的贡献。
A novel control strategy to enhance the doubly-fed induction generator （DFIG） was presented. dynamic stability of grid-connected wind farm based on The oscillation energy of system was consistent with its transient energy, the element dissipating energy had positive contribution to the attenuation of unbalancing energy and had positive damping. Then a dynamic stability control strategy based on oscillation energy consumption was studied, the impacts of DFIG operation limits on the control were also discussed, and analyzing the necessity of reactive power compensation for wind farm. The control strategy storage unbalanced energy temporarily and provided fast reactive power compensation by making use of the DFIG fast active and reactive power regulation characteristic, it could improve the dynamic stability of the system. A testing system including a DFIG-based wind farm was realized using DigSILENT/Power Factory, the strategy validation and the contribution to power system stability enhancement were verified by simulation.
出处
《电机与控制应用》
北大核心
2015年第6期36-42,共7页
Electric machines & control application
关键词
双馈感应发电机
振荡能量
动态稳定
有功控制
无功控制
doubly-fed induction generator
oscillation energy
dynamic stability
active power control
reactive power control
