MPPT solar controller control method is what

Solar controller is used to control photovoltaic panels for battery charging, and to provide voltage sensitive equipment load control voltage of the device. For MTTP solar controller, it is the core of photovoltaic power generation system, can effectively adjust electric module to achieve storage function. 

 Today inverter manufacturer's detailed look at with you together. MPPT solar controller methods traditional MPPT methods according to the judgment method and criterion of different methods are divided into open loop and closed loop MPPT. In fact, the change of ambient temperature, illumination and load's influence on the photovoltaic battery output characteristic presents some of the basic law, such as voltage of maximum power point of pv cells and pv cells approximate linear relationship between the open circuit voltage, based on these rules, can put forward some of the open loop MPPT control method, such as constant voltage tracking method, short circuit current ratio coefficient method and the interpolation calculation method, etc. 

 Closed-loop MPPT method is based on photovoltaic battery output voltage and current value of the real time measurement and closed-loop control to realize MPPT, the most widely used since the optimization algorithms that fall into this category. MPPT solar controller main functional testing main circuit dc voltage and output current, calculate the power output of the solar array, and realize the maximum power point tracking. Disturbance resistance R and MOSFET string together, under the condition of stable output voltage, by changing the duty ratio of MOSFET, resistance to change by the average current, so the current disturbance. At the same time, the output current of photovoltaic cell voltage will also be changed, by measuring the perturbation pv cells before and after the change of the output power and voltage, to determine the disturbance direction of the next cycle, when the disturbance in the right direction solar energy panels output power increases, the cycle is to continue in the same direction perturbation, on the other hand, the disturbance in the opposite direction, so, the iterative perturbation and observation to solar pv output of maximum power point.
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