改进型扰动观察法在光伏MPPT中的研究  

Application of Improved Perturbation and Observation Method to Photovoltaic MPPT

作　　者：荣德生[1] 刘凤[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105

出　　处：《电力系统及其自动化学报》2017年第3期104-109,共6页Proceedings of the CSU-EPSA

摘　　要：为了解决传统扰动观察法稳态精度低、响应速度差、容易发生误判等问题,该文提出了一种基于滞环比较的变步长改进型扰动观察法。文中对光伏电池进行了深入的研究,探讨了升压变换器实现最大功率点跟踪MPPT的原理,在Matlab/Simulink中建立了MPPT的仿真模型,通过仿真验证了该方法的可行性。采用DSP(芯片为TMS320F28335)进行了实验,验证了该方法能快速跟踪到最大功率点,并且有良好的启动特性,有效消除了误判及最大功率点附近的振荡现象。In order to solve the problems of traditional perturbation and observation method, such as low steady-stateaccuracy, poor response speed and high possibility of misjudgment, an improved variable step perturbation and obser-vation method is proposed based on hysteresis comparison. The photovohaic cells are studied and the principle of maxi-mum power point tracking （MPPT） with BOOST converter is discussed. The simulation model of MPPT is established inMatlab/Simulink, and the feasibility of the proposed method is verified. DSP （with chip TMS320F28335） was used inthe experiment. The proposed method can quickly track the maximum power point, and it has good starting characteris-tics, which effectively eliminates the misjudgment and the oscillation in the vicinity of maximum power point.

关 键 词：升压变换器 滞环比较 变步长扰动观察法 最大功率点跟踪 光伏 

分 类 号：TM615[电气工程—电力系统及自动化]