电网对称故障时双馈感应发电机低电压穿越控制  

Low voltage ride-through control of doubly fed induction generator during symmetric voltage sag

作　　者：蔚兰[1,2] 陈国呈[1] 曹大鹏[1] 吴国祥[3] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]上海工程技术大学电子电气工程学院,上海201620 [3]南通大学电子信息学院,江苏南通226007

出　　处：《电机与控制学报》2010年第7期1-6,共6页Electric Machines and Control

基　　金：教育部博士点基金(20060280018)

摘　　要：分析电网对称故障时,双馈感应风力发电机定子磁链变化过程、导致定转子过电流的原因、电网故障发生具体时刻及故障程度对双馈感应发电机定转子的影响,提出一种双馈感应风力发电机转子侧变换器低电压穿越控制策略,改善了双馈感应发电机在电网故障时定、转子过电流的情况,实现了双馈感应发电机在电网对称故障时的低电压穿越。在理论分析基础上,建立双馈感应发电机转子侧变换器低电压穿越控制模型和3 kW双馈感应发电机励磁变换器低电压穿越控制实验系统。实验结果表明,所提出的双馈感应发电机低电压穿越控制策略动态响应快、方法行之有效。Based on analysis of change of the doubly fed induction generator（DFIG） stator flux,the cause of over current both in stator and rotor and the voltage sag occurring time and voltage sag percent effects on the DFIG stator and rotor during the symmetric grid fault,a new DFIG rotor side converter low voltage ride though（LVRT）control method to prevent the DFIG over current is proposed in the paper.Af-ter the theoretical analysis,the model of LVRT control strategy is established.A 3 kW DFIG excitation control experimental system is established.The test results validate the LVRT control method of DFIG which has a quickly dynamic response and is effective.

关 键 词：双馈感应风力发电机 低电压穿越 电网对称故障 转子侧变换器 

分 类 号：TM614[电气工程—电力系统及自动化]