双馈风电机组运行方式对系统电压稳定性的影响  

Impacts of Operation Modes of Doubly-Fed Wind Turbine Generator on System Voltage Stability

作　　者：丁明[1] 李宾宾[1] 韩平平[1] 

机构地区：[1]合肥工业大学教育部光伏系统工程研究中心,安徽省合肥市230009

出　　处：《电网技术》2010年第10期26-31,共6页Power System Technology

基　　金："十一五"国家科技支撑计划重大项目(2008BAA14B02);国家重点基础研究专项经费项目(2009CB219702)~~

摘　　要：双馈风电机组运行方式的选择对并网系统电压稳定性有着重要影响,目前有恒功率因数和恒电压运行2种方式,其本质区别是无功调度和电压控制策略的不同。在建立双馈风力发电机的简化动态模型基础上,提出与2种运行方式相对应的控制策略,并运用静态连续潮流法、准静态时域仿真法以及时域仿真法分别研究不同并网方式下风电机组输出功率的变化对系统电压稳定性的影响。仿真结果表明,2种运行方式下系统电压均可维持在限定范围内,而恒电压控制方式由于充分发挥了双馈风电机组的无功调节功能,在改善系统电压稳定性方面比恒功率因数运行方式具有更大的优越性。Operation modes of doubly-fed induction generator （DFIG） greatly impact the voltage stability of power grid connected with wind farm. At present, there are two operation modes of DFIG, i.e., constant power factor mode and constant voltage mode, the essential difference between the two operation modes is that in reactive power scheduling and voltage control strategies. On the basis of building simplified dynamic model of DFIG, the control strategies corresponding to the two operation modes are proposed, and the impacts of output power variation of DFIGs on voltage stability of power grid under different grid-connection modes are researched by static continuous power flow, quasi-static time-domain simulation and time-domain simulation. Simulation results show that using the proposed control strategies, the system voltage under above-mentioned two operation modes can be maintained in the specified range, and because of fully playing the role of DFIG＇s reactive power regulation function the constant voltage control mode possesses superiority than constant power factor operation control mode in the improvement of power grid voltage stability.

关 键 词：风电场 双馈发电机组 控制策略 电压稳定 连续潮流 时域仿真 

分 类 号：TM61[电气工程—电力系统及自动化]