中文摘要：

研究了STATCOM与SVC提高大型异步机风电场低电压穿越（LVRT）能力的效果。分析了恒速异步风力发电机LVRT能力低的原因以及STATCOM与SVC提高其LVRT能力的作用机理。在PSCAD/EMTDC中分别搭建了STATCOM、SVC控制模型和含异步机风电场的IEEE14节点电网的仿真模型,通过仿真实验验证了这两种无功补偿装置对于提高异步机风电场LVRT能力的重要作用。仿真实验结果表明：STATCOM与SVC均能够帮助风电场在电网故障后快速重建电压,降低电网同步发电机励磁电压峰值和强励时间,抑制发电机转子加速,使异步风力发电机组穿越低电压故障区域。STATCOM比SVC有更好的补偿稳定性,提高异步机风电场LVRT能力更突出。

英文摘要：

The effect of STATCOM and SVC to improve LVRT capability of the large-scale induction generator wind farm was studied. Reasons of poor LVRT capability of constant speed wind turbines equipped with induction generator and the mechanism of STATCOM and SVC respectively to improve LVRT capability of wind farm were analyzed. The STATCOM and SVC with its respective controller model and IEEE14 nodes grid containing induction generator wind farm model were set up in PSCAD/EMTDC. According to the simulation results, it can be deduced that STATCOM and SVC can assist wind farm to rebuilt voltage rapidly after faults cleared, reduce the exciter ceiling voltage and forced excitation time of synchronous machine in the network and restrains rotor acceleration so the induction wind turbine induction generator can ride through the low voltage fault zone. STATCOM is better in control stability and more effective in improving LVRT capability of wind farm induction generator than SVC.