DFIG暂态特性分析及联合HVRT控制策略  

Transient Characteristics Analysis of DFIG and Research on High Voltage Ride Through Control Strategy

作　　者：王艳娟 孙潇 曹德印 WANG Yanjuan;SUN Xiao;CAO Deyin(Tangshan Caofeidian District Power Supply Branch of State Grid Hebei Electric Power Co.,LTD.,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3期52-58,共7页Micromotors

摘　　要：双馈感应风力发电机(DFIG)高电压穿越(HVRT)问题中,其故障响应等效于在原有的稳态响应基础上增加一个电压骤升分量,以此来分析HVRT的暂态特性;针对传统“灭磁”控制无法对T_(e)进行有效控制,且要求对ψs进行精确测量的不足,本文提出一种电流追踪控制策略实现DFIG的HVRT。在此基础上,依据随R_(r)的增加,ξ随之增加,且ξ越大,抑制DFIG振荡作用越明显,提出附加阻抗控制。DFIG联合控制策略结构简单,效果显著,克服了灭磁控制无法对T_(e)进行控制的弊端,且最小化了DFIG的脉动程度,实现了DFIG的广义故障穿越。In the HVRT problem of DFIG,the fault response of DFIG is equivalent to the dynamic response of DFIG by adding a voltage surge component to the original steady-state response.Based on this,the transient characteristics of DFIG were analyzed in detail,and the rotor current was further deduced.In addition,because the traditional"de-excitation"control can not control effectively,and requires accurate measurement,this paper proposed a current tracking control strategy to realize the HVRT of DFIG.On this basis,the additional impedance control was proposed according to the fact that with the increase of R_(r),ξincreases,and the largerξ,the more obvious the suppression of DFIG oscillation.The joint control strategy of DFIG has simple structure and remarkable effect,which overcomes the disadvantage that de-excitation control cannot control T_(e),and minimizes the pulsation degree of DFIG,and realizes the generalized fault ride through of DFIG.

关 键 词：双馈感应风力发电机 高电压穿越 暂态特性 电流追踪 附加阻抗 

分 类 号：TM315[电气工程—电机] TM34