基于双混合钳位式变流器的永磁直驱风力发电系统控制策略  

Control Strategy of Permanent Magnet Direct-Driven Wind Generation System Based on Hybrid Clamp Dual PWN Rectifier

作　　者：曹海洋[1,2] 沈建辉[1,3] 姜子健[1] 刘稳[3] 

机构地区：[1]中国矿业大学信电学院,徐州221000 [2]江苏省工程实验中心,徐州221000 [3]淮安供电公司,淮安223001

出　　处：《电工技术学报》2016年第11期32-40,共9页Transactions of China Electrotechnical Society

摘　　要：针对大功率双三电平永磁直驱式风力发电系统,采用一种新型的混合钳位式三电平结构,在分析了其工作原理的基础上,对混合钳位式三电平变流器的64种电压空间矢量分别在能量馈入和馈出情况下对中点电位和钳位电容电压的影响特性进行分析,得出中点电位平衡调制策略;又对钳位电容的充放电回路进行分析,推导出钳位电容电压在能量馈出和能量馈入情况下,分别采用不同的电平状态切换的调制方式实现钳位电容电压的平衡。在对永磁同步发电机(PMSG)和混合钳位式整流器的数学模型研究的基础上,给出了对机侧变流器和网侧变流器分开控制的策略。在Matlab/Simulink平台下搭建相应的仿真模型,通过仿真与实验验证了所提算法的正确性,并且具有较好的动、静态性能。For the high power dual three-level permanent magnet direct-driven wind generation system,a novel hybrid clamped three-level inverter topology is adopted and its operational principle is analyzed. The impact characteristics of 64 voltage space vectors on the neutral point potential and the clamping capacitor voltage are analyzed respectively in the cases of feed-in and feed-out state to achieve the neutral point potential balance control strategy. On the basis of the clamping capacitor＇s charging and discharging circuits,different level state switching methods are used to control the clamping capacitor voltage balance in the case of feed-in and feed-out states. Based on the mathematical model of the permanent magnet synchronous generator（ PMSG） and the hybrid clamped converter,the separation control strategies of the converter by the machine side and the grid-side converter are proposed respectively. The simulation model is built based on Matlab / Simulink. The control strategy is verified to be correct and have good static and dynamic properties.

关 键 词：永磁同步发电机 混合钳位 双PWM变流器 矢量控制 

分 类 号：TM46[电气工程—电器]