激光与光电子学进展, 2018, 55 (7): 072301, 网络出版: 2018-07-20
基于三段式变步长电导增量法的最大功率点跟踪策略
Tracking Strategy of Maximum Power Point Based on Three-Stage Variable Step-Size Incremental Conductance Algorithm
光学器件 光伏阵列 最大功率点跟踪 电导增量算法 变步长 optical devices photovoltaic array maximum power point tracking incremental conductance algorithm variable step-size
摘要
提出了一种三段式变步长电导增量算法,通过设定步长调整系数的上、下限阈值,将工作步长分为三种模式,保证了在光照强度剧烈变化的情况下,系统仍能以较大步长运行,避免了传统电导增量法动态响应速度慢的问题。仿真结果表明,该算法可将系统的动态响应时间缩短至5~6 ms,且最大功率点附近的功率振荡明显减弱,系统的功率损失降低,跟踪精度得到提高。
Abstract
A three-stage variable step-size incremental conductance algorithm is proposed, which divides the operating steps into three modes by setting the upper and lower thresholds of the step-adjustment coefficients to ensure that the whole system can still operate with a relatively large step size when the illumination intensity changes drastically. The problem of a slow dynamic response speed for the traditional conductance incremental method is avoided. The simulation results show that, this algorithm can shorten the dynamic response time of this system to 5-6 ms. Moreover, the power oscillation near to the maximum power point is obviously weakened, the power loss of this system is also reduced, and the tracking accuracy is enhanced.
刘春娟, 孙赟赟, 穆洲, 马占书. 基于三段式变步长电导增量法的最大功率点跟踪策略[J]. 激光与光电子学进展, 2018, 55(7): 072301. Liu Chunjuan, Sun Yunyun, Mu Zhou, Ma Zhanshu. Tracking Strategy of Maximum Power Point Based on Three-Stage Variable Step-Size Incremental Conductance Algorithm[J]. Laser & Optoelectronics Progress, 2018, 55(7): 072301.