摘要
从建立并网异步风电场简化等效模型出发,详细分析了含线路参数的大容量异步风电场暂态特性和功率特性,并在此基础上定量分析了异步风电场的临界切除时间与无功设备补偿容量间的关系,最终提出了基于风电场转矩特性和功率潮流的大容量异步风电场静止同步补偿器的容量配置方法。该配置方法可计算满足电网导则中低电压穿越要求的大容量异步风电场所需配置的最小静止同步补偿器无功补偿设备容量,并通过仿真平台验证了所提计算方法的正确性。最后对影响异步风电场的低电压穿越能力的相关因素进行了深入分析,揭示了大电网与异步风电场间电气距离与其所需配置静止同步补偿器设备容量间的关系以及静止同步补偿器配置容量对异步风电场暂态运行特性的影响。
Based on the simplified equivalent model of the grid connected fixed-speed induction generator（ FSIG）-based wind farm containing line parameters, the transient characteristics as well as the power characteristics of large capacity wind farms are analyzed in detail,and thus the relationship between the critical clearing time（ CCT） and the reactive power compensation capacity of the FSIG-based wind farm is presented quantitatively. Moreover,the configuration method using the torque characteristics and the power flow of the wind farm to determine the capacity of the static synchronous compensator（ STATCOM） for large capacity wind farms is firstly proposed. The proposed method can be used to calculate the minimum STATCOM capacity for the gridconnected FSIG-based wind farm satisfying the requirement for low voltage ride through（ LVRT） in the guide rules. Furthermore, the proposed configuration method is verified by the simulation results. Finally, the correlative factors affecting LVRT characteristics are elaborated, the relationship between the capacity of the STATCOM and the electrical distance between the wind farm and the connected power grid is analyzed,and the impact of the STATCOM＇s capacity on wind farm＇s transient operation performance is assessed.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第1期45-54,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51477016)
中央高校基本科研业务费重点项目(106112015CDJR155516)资助
关键词
定速异步风电场
低电压穿越
静止同步补偿器
容量配置
暂态特性分析
Fixed-speed induction generator-based wind farm
low voltage ride through
static synchronous compensator
capacity configuration
analyses of transient characteristics
