PHOTOVOLTAIC SYSTEM HAVING FAULT DIAGNOSIS APPARATUS, AND FAULT DIAGNOSIS METHOD FOR PHOTOVOLTAIC SYSTEM

摘要

The present invention relates to a fault diagnosis for a photovoltaic system. A fault diagnosis apparatus includes a temperature sensor unit measuring both an internal temperature value of the junction box and a surface temperature value of the solar module; a voltage sensor provided in the junction box; and an operation unit determining where a fault occurs among the solar module, an inside of the junction box, and the inverter by comparing measured values of the temperature sensor unit with a measured value of the voltage sensor. According to the present invention, initial investment cost is inexpensive. In addition, it is possible to detect solar module faults that are difficult to be checked by the naked eye.

主权项

1. A fault diagnosis apparatus of a photovoltaic system, the photovoltaic system including: a solar module including a plurality of solar cells arranged in a grid; a junction box connected to the solar module to output direct current power generated by the solar module; an inverter converting the direct current power generated by the solar module into alternating current power required for an electric load; and a server communication unit communicating with the solar module,
the fault diagnosis apparatus comprising: a temperature sensor unit measuring both an internal temperature value of the junction box and a surface temperature value of the solar module; a voltage sensor provided in the junction box; and an operation unit determining where a fault occurs among the solar module, an inside of the junction box, and the inverter by comparing measured values of the temperature sensor unit with a measured value of the voltage sensor.