Photovoltaic inverter intelligent transformer box

How intelligent is a PV inverter system?

Although various intelligent technologies have been used in a PV inverter system, the intelligence of the whole system is still at a rather low level. The intelligent methods are mainly utilized together with the traditional controllers to improve the system control speed and reliability.

How a transformer is used in a PV inverter?

To step up the output voltage of the inverter to such levels, a transformer is employed at its output. This facilitates further interconnections within the PV system before supplying power to the grid. The paper sets out various parameters associated with such transformers and the key performance indicators to be considered.

How do inverters affect a grid-connected PV system?

For a grid-connected PV system, inverters are the crucial part required to convert dc power from solar arrays to ac power transported into the power grid. The control performance and stability of inverters severely affect the PV system, and lots of works have explored how to analyze and improve PV inverters’ control stability .

What is the control performance of PV inverters?

The control performance of PV inverters determines the system’s stability and reliability. Conventional control is the foundation for intelligent optimization of grid-connected PV systems. Therefore, a brief overview of these typical controls should be given to lay the theoretical foundation of further contents.

What is expert system in PV inverter system?

Expert system usually refers to a class of computerized intelligent program systems with expertise and experience . The current development of expert system design is relatively mature, however, its application in PV inverter system is still in its infancy . The fundamental structure of an expert system is illustrated in Figure 11.

How can artificial intelligence improve the performance of PV inverters?

Control system optimization based on artificial intelligence is an effective way to improve the performance of PV inverters, allowing them to handle complicated control issues such as nonlinear dynamic interaction and multiple time-scale coupling .