Photovoltaic combiner box short-circuit current detection

What is a DC combiner box?

Our DC combiner boxes offer users the possibility to integrate short-circuit and overvoltage protection, as well string monitoring solutions (I,V, T and SPD and switch isolator status), for PV systems using central inverters with PV panels in trackers and fix tilt systems.

Can a PVS detect a short-circuit fault?

An attached auto-encoder and clustering have been applied to I–V curves of a PVS to detect three types of short-circuit fault, two types of degradation fault, a partial shading with BpD open-circuit fault, a partial shading with BpD short-circuit fault, and a short circuit with degradation (Liu et al., 2021). Fig. 9.

Can a PV system detect faults among modules with different array configurations?

This PV system is capable of studying faults among modules with different array configurations. In order to test the ability of the proposed approach to detect and locate the faults and identify the fault types, a series of line-line faults within the string are used in the simulations.

How is fault detection performed on 15 4 PV array?

Fault validation on 15 × 4 PV array. The results show that accurate fault detection is performed by the calculation and threshold evaluation of residuals. Using Eqs. (1), (2), residuals are calculated for each string and evaluated for a possible occurrence of faults as per Eq. (3).

What is a current voltage (I–V) characteristic in a PV module?

The current–voltage (I–V) characteristics of the PV module are used to monitor the behavior/health of a PV system in operation. During normal operation, I–V characteristics follow a particular curve, which changes during a fault. The type and severity of a fault in a PVS significantly affect the degree of change of the I–V characteristics.

What is a fault detection method for photovoltaic module under partially shaded conditions?

A fault detection method for photovoltaic module under partially shaded conditions is introduced in . It uses an ANN in order to estimate the output photovoltaic current and voltage under variable working conditions. The results confirm the ability of the technique to correctly localise and identify the different types of faults.