基于低电压穿越评估的永磁直驱机组风电场无功优化  

Optimized Reactive Power for the Permanent Magnet Direct-drive Wind Farm Based on LVRT Evaluation

作　　者：王敏 周羽生[1] 杨航 李颖许 WANG Min;ZHOU Yu-sheng;YANG Hang;LI Ying-xu(College of Electrical Engineering and Information,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410114

出　　处：《电气开关》2022年第1期30-34,共5页Electric Switchgear

基　　金：国家自然科学基金资助项目(51307009);湖南省教育厅科学研究重点资助项目(19A018,18A120)。

摘　　要：为了提高永磁直驱机组风电场低电压穿越能力,提出了一种风电场优化无功出力控制方法。首先分析了风电机组无功和并网能力评价指标,提出风电机组低压穿越能力评价方法;然后综合考虑风电机组的运行状况以及无功输出能力,对风电场中的每台机组的低电压穿越能力进行评估,根据评估的结果分配每台机组的无功出力。仿真结果表明了该无功优化方法的可行性,有效提高了电网故障时风电场并网点电压。In order to improve the low voltage ride-through capability for the permanent magnet direct-drive wind power farm,a method of the wind power farm optimized reactive power output control is proposed.First,the evaluation indexes of reactive power capacity and grid connection capability of the wind power unit are analyzed,and the evaluation method of wind turbine low-voltage ride-through capability is proposed.Then,comprehensively consider the operating conditions and reactive power output capacity of the wind turbines,evaluate the low voltage ride-through capability of each unit in the wind farm,and allocate the reactive power output of each unit according to the evaluation results.The simulation results show that the improved reactive power distribution method can reasonably allocate the reactive power of each unit,and increase the grid-connected point voltage of wind farm as the power faults.

关 键 词：低电压穿越 永磁直驱机组 风电场 无功优化 

分 类 号：TM315[电气工程—电机]