远距离大型DFIG风电场的混合型HVDC建模及控制  

Modeling and Control for DFIG-based Wind Farm With Hybrid HVDC Connection

作　　者：周宏林[1] 杨耕[1] 耿华[1] 

机构地区：[1]清华大学自动化系,北京100084

出　　处：《电工技术学报》2010年第12期124-131,共8页Transactions of China Electrotechnical Society

摘　　要：针对远距离大型双馈感应发电机(DFIG)风电场,提出了一种混合型高压直流(Hybrid HVDC)输电方式并给了出其控制策略。在该方案中,HVDC整流侧采用基于晶闸管的相控换流器(LCC),并以STATCOM作为电压支撑为DFIG提供励磁和整流器换向电压;逆变侧采用基于全控器件的电流源型逆变器(CSI),从而达到对电网提供独立无功支撑的目的。文章首先建立了DFIG风电场及混合型HVDC并网系统的动态数学模型,然后针对其中的STATCOM子系统、整流器子系统和逆变器子系统给出了相应的控制器设计方法。经Matlab/Simulink仿真验证,该系统能够顺利完成黑启动,具有精确的功率跟踪和快速的功率响应能力,还能够向电网提供独立的无功支撑。For doubly-fed induction generator（DFIG）-based large wind farm,this paper proposes a new HVDC（High-Voltage DC） transmission topology along with its modeling and control methods.In the proposed topology,the sending end is a line-commutated converter（LCC） with a static synchronous compensator（STATCOM）,which serves to provide stator voltage support for DFIGs,as well as commutation voltage for the LCC.The receiving end is a current source inverter（CSI） using forced-commutated devices so as to give independent reactive power support to the grid.The mathematical model of the overall system is presented and corresponding control strategies are proposed.Simulation results show that the proposed system not only possesses the black-start capability and has fast active power response,but also provides independent reactive power support to the grid if necessary.

关 键 词：风电场 高压直流输电 混合型高压直流 双馈感应发电机 

分 类 号：TM614[电气工程—电力系统及自动化] TM761