一种用于定速异步风机的LVRT装置  

Low Voltage Ride Through Apparatus Implemented on Fixed-speed Induction Wind Turbine

作　　者：刘莫然[1] 尹忠东[2] 赵士硕[2] 陈慧莹[3] 

机构地区：[1]福建省电力有限公司福州电业局,福建福州350009 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]福建省电力有限公司水口发电集团有限公司,福建福州350003

出　　处：《电力电子技术》2013年第6期92-94,共3页Power Electronics

摘　　要：提出一种应用于鼠笼异步发电机的低电压穿越(LVRT)解决方案。装置由制动电阻及背靠背换流器组成,电网故障时,LVRT装置能支撑机端电压,稳定电机转速,避免风机保护切机造成电网功率不平衡。装置换流器采用功率解耦控制,制动电阻吸收功率可调。对该系统进行硬件实验,结果证明了该方法的正确性。This paper puts forward a new solution for fixed-speed induction wind turbine facing low voltage ride through （LVRT） fault.This device consists of braking resistor and back-to-back power converter.When facing LVRT fault,wind turbines connect to power grid via LVRT apparatus which can support the voltage and smooth the rotor speed in order to avoid cut off by relay system.Using deeoupling control strategy to control active and reactive power,braking resistor can reduce the acceleration of the speed of the rotor,thus generator voltage and rotor speed can be controlled.Finally, the experimental results prove the correctness of these control strategies.

关 键 词：异步发电机 低电压穿越 制动电阻 

分 类 号：TM343[电气工程—电机]