基于容积卡尔曼滤波的多峰MPPT算法

Multi-peak MPPT Algorithm Based on Cubature Kalman Filter

针对局部阴影下光伏阵列的最大功率点(MPP)误跟踪问题,利用传统的扰动观察法确定MPP的电压范围,用较小步长控制电压变化,结合非线性容积卡尔曼滤波(CKF)算法估计各电压的功率大小,抑制观察法所带来的量测误差,同时根据状态估计的突变检测,快速寻找MPP,避免误跟踪情况的发生。通过具体实验分析,结果说明了该控制方案的精准性和有效性。

For the mistracking problem of the photovohaic array maximum power point（MPP） under partial shade, us- ing the traditional perturbation and observation method to determine the voltage range of MPP.And controlling voltage changes with a smaller step size,combine with the nonlinear cubature Kalman fiher（CKF） algorithm to estimate the power of each voltage, to reduce measurement error by observation.At the same time, according to the state estimated mutation detection ,quickly find the MPP to avoid mistracking.Through experiment analysis,the results illustrate the accuracy and validity of the control scheme.