摘要
目前变速恒频双馈风力发电机(DFIG)采用解耦控制策略,DFIG的输出功率不受系统频率影响,对系统没有频率支撑作用。为改善这一问题,在传统的DFIG控制中加入辅助频率控制环节,让DFIG表现出常规发电机组的惯性响应效果。为了防止DFIG因参与频率调节而导致其停转,给系统频率的恢复带来不利影响,提出将DFIG的转子转速引入辅助频率控制环节,该方法能够有效避免DFIG停转情况的发生。仿真结果证明,加入辅助频率调节功能的DFIG能够有效地改善系统的动态频率特性。
The present VSCF double-fed wind generators（DFIG） adopt decoupling control,and the output of DFIG. isn’t affected by the frequency of the system,so the present DFIG cann’t support the frequency of the power system.To solve this problem,this article makes the traditional DFIG show the response of inertia as regular generating unit by adding the auxiliary frequency regulation to the traditional DFIG.To avoid the DFIG stop due to participating frequency regulation,which brings adverse effects to the recovery of the system’s frequency,this article introduces a novel algorithm to prevent that kind of situation by introducing the rotor speed of DFIG to auxiliary frequency regulation.The simulation results show that the DFIG with auxiliary frequency regulation can improve the dynamic frequency of the system effectively.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2011年第11期56-61,共6页
Power System Protection and Control
关键词
双馈风力发电机
转动惯量
频率调节
节距角
转子转速
double-fed wind generators
moment of inertia
frequency regulation
pitch angle
rotor speed
