APPARATUS FOR PROTECTING REVERSE POWER IN CONNECTION BOARD OF SOLAR POWER GENERATOR

摘要

The present invention relates to a solar connection panel reverse power prevention device. In a solar power generation system, a connection panel (6) is provided to combine DC power outputted from a plurality of solar cell strings (2) and provide the combined DC power to an inverter (16). The connection panel (6) is connected between each solar cell string (2) and the inverter (16), and includes reverse power prevention diodes (12) for preventing damage to a solar cell module (2a) due to reverse voltage or reverse current, respectively. An individual state checking unit (14) of the reverse power prevention diodes includes a diode operation monitoring circuit unit (14a) connected to each of the reverse power prevention diodes (12) in parallel and including a driving state display lamp (L1) and includes a diode fault monitoring circuit unit (14b) including a fault state display lamp (L2). The diode operation monitoring circuit unit (14a) and the diode fault monitoring circuit unit (14b) allow the current state of each of the reverse power prevention diodes (12) to be immediately recognized in the field, in which the connection panel (6) is present, in the turn-on and turn-off state of the driving state display lamp (L1) and the fault state display lamp (L2) as voltage values (VA, VB) of input and output terminals of the reverse power prevention diodes are compared.