中文说明：扰动观察法(Perturbation and Observation)是目前经常被采用的MPPT方法之一。其原理是每隔一定的时间增加或者减少光伏阵列输出电压这一过程称为“干扰”并观测之后其输出功率变化方向若ΔP>0说明参考电压调整的方向正确可以继续按原来的方向“干扰”若ΔP<0说明参考电压调整的方向错误则需改变“干扰”的方向[6]。 扰动观察法仿真 在Matlab/Simulink建立如图1所示仿真电路其中光伏电池模型、Boost电路阻抗变换关系均采用嵌入函数形式[7]。控制算法的输入为系统工作电流和工作电压系统输出在前面我们设定为电压增量但是电压增量还是要转换为PWM电路的占空比为了便于系统仿真和电路实现所以将系统输出直接指定为占空比D。
English Description：
The perturbation and observation method is one of the commonly used MPPT methods. The principle is to increase or decrease the output voltage of photovoltaic array every certain time. This process is called "interference". After observation, the change direction of output power if Δ P & gt; 0 indicates that the direction of reference voltage adjustment is correct can continue to "interfere" in the original direction; 0 indicates that the direction of reference voltage adjustment is wrong then the direction of "interference" needs to be changed [6]. &The simulation circuit as shown in Figure 1 is established in Matlab / Simulink, in which the photovoltaic cell model and boost circuit impedance transformation relationship are in the form of embedded function [7]. The input of the control algorithm is the system working current and voltage the system output is set as the voltage increment but the voltage increment still needs to be converted into the duty cycle of the PWM circuit in order to facilitate the system simulation and circuit implementation so the system output is directly designated as the duty cycle D.