直驱式风电机组风电场动态等值  

Dynamic Equivalent Algorithm for Wind Farm Composed of Direct-Drive Wind Turbines

作　　者：高峰[1] 赵东来[1] 周孝信[1] 安宁[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2012年第12期222-227,共6页Power System Technology

基　　金：国家863高技术基金项目(2011AA05A105)~~

摘　　要：以并网点运行特性一致性为目标,提出了一种直驱式风电机组风电场的等值算法。该等值算法定义了能够反映全部直驱式风电机组运行特性的分群指标,利用聚类算法对直驱式风电机组进行分群;以等值机的风力机与单台风电机组风力机的功率转换特性不变为原则,对同群风电机组的风力机参数进行等值;以被等值的风电机组输出功率之和与等值机输出功率相等为原则对风电场集电线路进行了静态等值。仿真研究表明,等值前后风电场并网点的运行特性一致,等值算法能够更加准确地反映直驱式风电场的并网特性,具有重要的工程应用价值。Taking the consistency of operational characteristic at grid-connection point as objective, a new equivalent algorithm for wind farm composed of direct-drive wind turbines is proposed. In the proposed algorithm a clustering index that can reflect operational characteristics of all direct-drive wind power generators is defined, and clustering algorithm is utilized to cluster direct-drive wind power generators; based on the consistency principle between power converting characteristic of wind turbine of equivalent wind power generator and that of the wind turbine for single wind power generator, the equivalence of parameters of wind turbines for wind power generators belonging to the same cluster is performed; based on the principle that the sum of output power of wind power generators to be equivalent is equal to the output power of the equivalent wind power generator, the static-state equivalence of collector line of wind farm is performed. Simulation results show that before and after the equivalence the operational characteristics at grid-connection point are consistent, thus the proposed equivalent algorithm can reflect the grid-connection characteristic of wind farm composed of direct-drive wind turbine more accurately.

关 键 词：直驱式风电机组风电场 动态等值算法 分群指 标 一致性 

分 类 号：TM614[电气工程—电力系统及自动化]