Development of an Analog Maximum Power Point Tracker for Photovoltaic Panel

Fuzzy Maximum Power Point Tracking Techniques Applied to a Grid-Connected Photovoltaic System

“…The short circuit current method is a very simple MPPT method, the PV current is compared with a constant reference current that corresponds to the I MPP . The error signal can be used in simple controllers with integral action to eliminate the error in steady state Tariq & Asghar (2005). One of the main drawback of this method is that available energy is wasted when the load is disconnected from the PV generator to measure the (I sc ).…”

“…during the operation of the system also increases the complexity of the circuit (I sc ).Moreover , the ambient conditions may change between the different measurements intervals and the PV generator conditions may vary A. Yafaoui (2009), Mutoh et al (2006, Tariq & Asghar (2005). Those problems make this method less popular despite of its simplicity.…”

Compact and efficient Maximum Power Point Tracking circuit for portable solar battery charger

“…When I SC = 150 mA, the new MPPT circuit can save the battery charging time by 52.3% than the battery charger without the MPPT. The previous MPPT circuit [4,5,6] which is based on the voltage-mode Buck converter can have the current overshoot problem, as shown in Figure 3 (e). Unlike the previous MPPT circuit, the new k · V OC MPPT that has the current control loop can regulate the charging current within a certain limit thus the new one does not show any current overshoot, as you can see in Figure 3 (e).…”

“…The complex digital system is not adequate for simple portable solar battery charging circuit. A fractional open-circuit voltage (k · V OC ) of the solar array is also known to approximate the MPP [4,5,6]. Here k is a fraction number.…”

Analog Control Algorithm for Maximum Power Trackers Employed in Photovoltaic Applications

“…MPPT control methods such as the perturb and observe (P&O) method [3], [4] and the incremental [5] require a microprocessor or DSP to determine if the duty cycle should be increased or not. Therefore, these techniques are very complex and expensive to implement [6]. The ripple correlation control [7] discerns the operating region with the sensed ripple voltage and current of a PV array.…”