Closed loop control system solar energy

Do closed-loop solar systems capture more energy?

The use of closed-loop on–off control with feedback provided by a solar sensor allowed capturing between 27.7% to 42.7% more energy in different seasons of the year with respect to a fixed PV system. The authors concluded that the closed-loop ST systems are more precise but more complicated and expensive to implement than open-loop ST systems.

Can a closed-loop solar tracking system improve efficiency?

In summary, even for a small-scale solar tracking system, the algorithm-based closed-loop dual-axis tracking system can increase overall system efficiency.

How do open-loop solar systems work?

Open-loop systems use a solar positioning algorithm (SPA) and, through a set of input parameters, can estimate the apparent position of the Sun. Regularly, due to the number of variables employed and because there is no feedback in the control, their accuracy is low.

What do open-loop solar systems use instead of sensors?

The open-loop ones have no sensors either but use a microprocessor and are based on the sun position algorithm using a mathematical formula to obtain the station of the sun at a particular location and time, and it does not need to sense any physical quantity [22 – 24].

Can a solar tracker be a closed-loop controlled tracker?

Among the many works done in the design and implementation of a low-cost dual-axis autonomous solar tracker, Gabe et al. have designed a complete autonomous solar tracker which is an example of a closed-loop controlled tracker using light-dependent resistors (LDRs).

What are the advantages and disadvantages of a closed-loop system?

The main advantage of the closed-loop strategy is that it achieves higher ST precision than open-loop systems because of feedback control by using a solar sensor. The sensor, however, is susceptible to weather disturbances and solar diffuse irradiance.