LINKAGE TYPE SOLAR LIGHT POWER GENERATING DEVICE WITH ABNORMALITY CHECKING FUNCTION FOR SOLAR BATTERY MODULE

摘要

PURPOSE: To provide a linkage type solar light power generating device with the abnormality checking function for the solar battery module which detects solar battery output voltages by strings and can automatically check a solar battery output and perform safe and secure maintenance management. CONSTITUTION: The linkage type solar light power generating device 1 consists of a solar battery array 2 and a linkage inverter 3, and the DC power generated by the solar battery array 2 is converted by the linkage inverter 3 into AC power of the same quality as a system power source 4 to perform linkage operation. The AC power is supplied to a load 5 and its excessive power returns to the system power source 4 as a tidal current. The solar battery array 2 is constituted by connecting plural series-connected solar battery modules in parallel and serial components of the solar battery modules are regarded as strings S1 -Snn . The output voltage Vss1 and Vsn of the respective strings S1 -Sn are compared with an input voltage Vin to detect and specify abnormality of strings.