应用于离网型风力发电系统的无源MPPT方法
Passive MPPT method for stand-alone wind power generation systems
摘要 针对离网型风力发电系统所使用的传统最大功率点跟踪(MPPT)方法可靠性相对较低,提出无源MPPT方法.采用此方法的新型发电机系统由1台双绕组永磁发电机、2个不可控整流器、1台蓄电池和负载构成.通过特殊设计系统结构,新型发电机系统的输入功率特性曲线与风力机的最大功率曲线相吻合,从而保证系统能够在不使用任何电控装置的情况下自动地实现MPPT,因此新型发电机系统具有较高的可靠性.通过分析无源MPPT的跟踪过程,阐明无源MPPT方法的原理.研究并建立新型发电机系统的数学模型.研究结果表明:当风速变化时,采用无源MPPT方法的新型发电机系统能够准确地实现MPPT,并且其动态性能优于使用爬山法传统系统的动态性能.
Abstract:
Conventional maximum power point tracking (MPPT) methods used for stand-alone wind power generation systems (SWPGS) have low reliability, and thus a passive solution for MPPT was presented. Using a special structural design, it is possible to create a new generator system where the input power vs. rotor speed curve naturally fits to the wind turbine maximum power point (MPP) curve. This characteristic allows the proposed system to automatically realize MPPT without the use of any algorithm or electrical control device, thereby resulting in high reliability. The principle of the passive MPPT method was analyzed, and the mathematical model of the proposed system was established. The results show that the proposed system adopting the passive MPPT method can realize the passive MPPT, and its dynamic performance of MPPT is better than that of the conventional system using hill-climbing searching method.
Author: BAI Yinru KOU Baoquan CHAN C C
作者单位: 哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨,150001
年,卷(期): 2017, 48(2)
分类号: TM351
在线出版日期: 2017年4月1日
基金项目: 国家高技术研究发展计划(863计划)项目(2009AA05Z446)(Project(2009AA05Z446) supported by the National High Technology Research and Development Program