Photovoltaic grid -connected inverter fault -signal detecting system

The utility model provides a photovoltaic grid -connected inverter fault -signal detecting system: including hall sensor circuit, signal conditioning circuit, AD converting circuit and system power supply circuit, AD converting circuit includes still that reference voltage produces the circuit, the output of hall sensor circuit is connected with signal conditioning circuit's input electricity, andsignal conditioning circuit's output is connected with AD converting circuit's analog signal input electricity, and AD converting circuit's output and microprocessor electricity are connected, the system power supply circuit produces the circuit electricity with hall sensor circuit, signal conditioning circuit, AD converting circuit, reference voltage respectively to be connected, provides the power for it, the output of reference voltage production circuit links to each other with AD converting circuit's reference voltage input, provides reference voltage for it. The utility model disclosessaved the hardware cost gr