风能转换系统的MPPT变增益极值搜索控制  

MPPT variable gain extremum seeking control method for wind energy conversion system

作　　者：纪志成[1] 朱芸[1] 孟涛[1] 

机构地区：[1]江南大学电气自动化研究所,江苏无锡214122

出　　处：《电机与控制学报》2009年第3期414-418,共5页Electric Machines and Control

基　　金：教育部博士点基金(200802950004)

摘　　要：针对传统最大功率点追踪(MPPT)极值搜索法固定积分增益存在的不足,依据不同积分系数对系统的影响,提出了一种MPPT变增益极值搜索法,使积分增益随叶尖速比和功率系数之间平均相位移的变化而变化。仿真结果表明,采用改进后的MPPT极值搜索法,平均风能捕获率较传统的极值搜索法有所提高,且当系统达到稳定运行点后,叶尖速比的标准差较积分增益为0.01时降低了0.05,有效地抑制了系统在稳定点附近的振动,提高了系统的动态性能。In order to overcome the trouble brought by the fixed integral gain in the traditional maximum power point tracking（MPFT） extremum seeking control, a new method of MPPT extremum seeking control method was proposed for wind energy converter system according to the different results of the different integral gains. Through this method, the integral gain varies with the average phase shift between tip speed ratio and power coefficient. The simulation results indicated that the improved extreme seeking control method has improved the wind energy capture ratio comparing with the traditional MPPT control method and also the traditional MPPT extreme seeking control method. What＇s more, once the system is in steady-state regime, the standard deviation of the tip speed ratio decreases by 0. 05 than the one when the integral gain is 0. 01. This method has effectively suppressed the system vibration, so that enhanced system＇s dynamic performance.

关 键 词：风能转换系统 最大功率点追踪控制 极值搜索控制 变增益 

分 类 号：TM614[电气工程—电力系统及自动化]