Photovoltaic inverter contact current experiment

Can a PV inverter improve power factor?

The paper presents the development of a control scheme that allows the PV system’s inverter to improve the power factor in the electrical system with or without PV power generation. The proposed control is based on using a sliding mode controller (SMC) current control loop and PI-based voltage control loop.

What is a photovoltaic inverter control strategy?

The main objective of the inverter control strategy remains to inject the energy from the photovoltaic panels into the electrical grid. However, it is designed to inject this power through unbalanced currents so that the local unbalance introduced by the inverter contributes to the overall rebalancing of the grid’s total currents.

Can photovoltaic inverters control current balancing?

Current balancing in distribution grids using photovoltaic inverters. Control based on the decomposition of instantaneous power into symmetric components. Feasibility of the control strategy demonstrated through experimental results.

How do PV inverters control a low-voltage network?

Thus, a control method for PV inverters is presented, so that they inject unbalanced currents into the electrical grid with the aim of partially compensating any current imbalances in the low-voltage network where inverters are connected, but in a decentralized way.

Why are reactive power control laws important for PV inverters?

Consequently, the importance of reactive power control laws applied to PV inverters arises from the fact that common loads are especially non-linear [ 7 ]; these loads deteriorate the PF and create power quality problems that may affect other loads connected at the same point of common coupling (PCC) [ 8, 9 ].

How does a PV inverter work?

The inverter converts the output DC voltage from the PV array to AC voltage for supplying the grid and operates independently of the availability or absence of power generation of the PV array. The inverter circuit comprises an H bridge formed by switches S 1, S 2, S 3, and S 4, and these devices commute according to a control strategy.