摘要
为了改善大规模风电并网给电网频率带来的不利影响,基于双馈风电机组的控制特性,结合转子动能与备用功率控制的特点,提出一种频率分段控制的备用功率与转子动能相协调的多层次、多周期、多环节的联合调频控制方法.电网频率发生偏移时,风机既能快速释放或吸收转子动能,又能调节桨距角,实现风电机组的频率控制.在电力系统仿真软件中搭建供电网络模型,并结合实际电网运行情况进行仿真,仿真结果表明,该方法使得风电机组对频率变化具有快速响应能力,可有效改善电网的频率特性,为双馈风电机组安全稳定并网提供了可借鉴的依据.
In order to improve the negative effect of large-scale grid-connected wind power farms on the grid frequency,a multi-level,multi-cycle and multi-link collaborative frequency control strategy,which included the coordinative standby power and rotor kinetic energy with the frequency subsection control,was proposed based on the control characteristics of double fed induction generator( DFIG) and through combining with the characteristics of rotor kinetic energy and standby power control. When the grid frequency shifted,the DFIG could not only rapidly release or absorb the rotor kinetic energy,but also adjust the pitch angle so as to realize the frequency control of DFIG. A supply grid model was established with the power system simulation software,and the simulation was performed in combination with the actual running state of grid. The simulated results show that the proposed method makes the DFIG possess a rapid response capability for frequency change and can effectively improve the frequency characteristics of grid,which provides the useful references for the stable and safe grid-connected operation of DFIG.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2015年第3期260-267,共8页
Journal of Shenyang University of Technology
基金
辽宁省博士启动基金资助项目(20111040)
关键词
双馈风电机组
转动惯量
稳定性
转子动能
备用功率
一次调频
有功出力
频率控制
double fed induction generator
moment of inertia
stability
rotor kinetic energy
standby power
primary frequency regulation
active power output
frequency control
