摘要
通过对双PMW直驱式永磁同步风力发电机(PMSG)系统的研究,针对电网对无功控制和低电压穿越能力的技术要求,提出了一种改进型功率变换控制方法,该方法通过机侧整流器稳定直流母线电压,网侧逆变器跟踪风力机的转速实现最大风能利用;且在并网口高压端加装静止同步无功补偿器(STATCOM),以提高风电系统的无功补偿能力,通过STATCOM与网侧逆变器的协调控制,进一步提高PMSG系统的低电压穿越能力。仿真结果表明所提出的方案有效提高了PMSG系统的无功补偿和低电压穿越能力。
According to the technical requirements for the reactive power control and low-voltage ride-through （LVRT）, an improved power switch control method is proposed through analyzing the wind turbine with a direct-driven permanent magnet synchronous generator （PMSG）. The machine-side converter is used to stabilize DC link dynamic voltage and the network-side converter tracks the speed of the wind turbine to output the best energy. And a static synchronous compensator （STATCOM） is added to the pressure-side of PCC. Through the coordinated control of STATCOM and the network-,.~de inverter, the wind power capacity of reactive power compensation is increased and the LVRT of PMSG is flasher improved. The simulation results show that the new method can effectively provide reactive power and improve the low voltage ride through capability of variable speed wind turbines with PMSG.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第2期135-140,共6页
Power System Protection and Control
基金
国家自然科学基金(50877034)~~
