双馈型风电场双层无功分配策略  

Hierarchical Distribution Strategy of Reactive Power for DFIG Wind Farm

作　　者：张文 阙波[2] 韦古强 刘卫东 陈光明 

机构地区：[1]都城绿色能源有限公司,北京100020 [2]国网浙江省电力公司,浙江杭州310007 [3]鲁能集团有限公司,北京100020

出　　处：《电力工程技术》2017年第1期79-83,共5页Electric Power Engineering Technology

基　　金：国家电网公司科技项目(国家电网科[2015]709号文)资助

摘　　要：针对风力发电效率普遍较低的问题,从减少风电场及风电机组有功损耗的角度出发,提出一种双馈型风电场双层无功分配策略。该策略在传统无功分配策略的基础上,考虑电机定子、网侧变流器功率极限,实现以有功损耗最小为目标的优化分配,以提高风电场发电效率。基于Matlab/Simulink平台搭建双馈风电场仿真模型,仿真结果验证了该控制策略能大大减小机组内部功率损耗,提升风电场发电效率,同时还能有效抑制由于电网负荷变化导致的电压波动,提升电能质量。Considering the problem that efficiency of wind generation is generally low, a hierarchical distribution strategy of reactive power for DFIG wind farm is put forward to reduce the power loss of both wind turbine and wind farm. To improve the efficiency of wind generation, , the new strategy considers the stator and gird-side converters’ power limitation based on the traditional reactive power distribution strategy and realizes the optimal distribution with the aim of least power loss. A simulation model of DFIG wind farm is built on MATLAB/Simulink platform. The results prove that the strategy can greatly reduce the power loss of wind turbine, improve the efficiency of wind generation and suppress voltage fluctuation caused by load changes, improving power quality.

关 键 词：双馈型风电场 功率极限 双层无功分配 功率损耗 发电效率 

分 类 号：R730.58[医药卫生—肿瘤]