一类级联式双定子无刷双馈发电机静态无功调节能力分析  

Analysis on Adjustment Capability of Reactive Power for A Kind of Cascaded Dual-stator Brushless Doubly-fed Induction Generators

作　　者：姜云磊 程明[1] 韩鹏[1] 王青松[1] JIANG Yunlei;CHENG Ming;HAN Peng;WANG Qingsong(School of Electrical Engineering, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《电力系统自动化》2018年第8期143-148,184,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金重大国际(地区)合作研究项目(51320105002)~~

摘　　要：无刷双馈发电机是一种具有良好前景的新型风力发电机结构。文中提出了一类级联式双定子无刷双馈发电机无功运行范围的解析计算方法,以该种发电机并网工作时的稳态模型为工具,首先分析了机组的功率流和无功调节机理。在此基础上,综合考虑了发电机自身运行约束、网侧变换器容量约束对机组无功调节能力的影响,推导了该类电机在不同工作点下无功容量的解析算法。同时,考虑到控制绕组电感饱和特性和机组铜耗,对电机的有功功率/无功功率输出曲线进行修正。最后,利用一台10kW实际机组参数进行了分析和仿真,分析结果表明,综合考虑多种约束条件能使该类电机的无功调节能力分析更接近实际情况。Brushless doubly-fed induction generator（BDFIG）enjoys bright potential in the fields of wind energy conversion.In order to calculate the reactive power capability of a kind of cascaded dual-stator BDFIG（DS-BDFIG）,an analytical approach is provided.Based on the steady-state model of the DS-BDFIG under grid-connected operation,the power flow and adjustment mechanism of the system are firstly analyzed.Considering the current restraint and reactive power capacity of the grid side converter,the analytical arithmetic of reactive power capability for the DS-BDFIG system is then deduced.Moreover,the effect of copper loss and saturation on reactive power capability are taken into consideration to adjust the output curves of active power and reactive power.By analysis and simulation of an actual 10 kW DS-BDFIG,it is shown that the reactive power limit of the DS-BDFIG considering multi-contraints approaches to reality.

关 键 词：级联式 无刷双馈发电机 双定子 无功容量 解析算法 静态约束条件 

分 类 号：TM315[电气工程—电机]