单闭环与去磁控制相协调的DFIG高电压穿越控制策略研究  

Analysis of DFIG Stator and Rotor Current in Case of Voltage Swell and Improvement of Reactive Current Configuration

作　　者：王艳娟 孙潇 李万禹 WANG Yanjuan;SUN Xiao;LI Wanyu(State Grid Hebei Electric Power Co.,LTD.,Tangshan Caofeidian District Power Supply Branch,Tangshan Hebei 063299,China)

机构地区：[1]国网冀北电力唐山市曹妃甸区供电公司,河北唐山063299

出　　处：《微电机》2024年第4期71-76,共6页Micromotors

摘　　要：双馈感应风力发电机(DFIG)高电压穿越(HVRT)过程中,传统的网侧换流器(GSC)双闭环控制中,不仅外环对DC-link电压振荡反应有延时,且对内环的补偿也有一定的滞后效应;此外,传统的转子侧换流器(RSC)控制对其容量利用率较低,在HVRT时,存在向转子注入无功不足等问题。针对上述情况,本文提出一种单闭环控制与去磁控制相协调的HVRT控制方案。仿真结果表明,GSC单闭环与RSC去磁相协调的HVRT控制策略,不仅有效抑制了HVRT过程中DC-link电压的波动,克服了传统控制的弊端,而且在保证功率平衡及RSC容量完全利用的状态下向转子侧注入了无功,提高了RSC利用率,成功实现DFIG的故障穿越。In the high voltage ride through problem of DFIG,in view of the traditional GSC double closed-loop control,the response of the outer loop to DC-link voltage oscillation is slow,and there is a certain delay to the inner loop compensation;and the traditional RSC control has low capacity utilization rate,and in HVRT,the reactive power injected into the rotor is insufficient,etc.,this paper proposed a HVRT control strategy coordinated by GSC single closed-loop control and RSC demagnetization control.The simulation results show that the HVRT control strategy coordinated by GSC single closed-loop and RSC demagnetization not only effectively suppresses the DC-link voltage fluctuation in the HVRT process,but also injected reactive power into the rotor side under the condition of ensuring power balance and RSC capacity full utilization,improved the RSC utilization ratio,and made DFIG successfully realize HVRT.

关 键 词：双馈感应风力发电机 高电压穿越 DC-link电压 单闭环 去磁控制 

分 类 号：TM315[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]