Distributed photovoltaic power generation on-line monitoring system based on wireless sensor network

The present invention provides a distributed photovoltaic power generation on-line monitoring system based on a wireless sensor network, comprising a host computer monitoring system and an equipment detection unit. A host computer acquires detection data information of each monitoring unit in a wireless local area network through a WLAN wireless communication unit and an RS485 communication unit, performs data storage and analysis, and releases a work state and alarm information of distributed photovoltaic power generation equipment; the equipment detection unit comprises a single-chip microcomputer working circuit, a power supply management circuit, a current and voltage detection circuit, an analog signal conditioning circuit, a temperature acquisition circuit, an RS485 communication circuit and a WLAN wireless communication module. The equipment detection unit controls work of each function module through a single-chip microcomputer, acquires current, voltage and temperature parameters of the photovoltaic power generation equipment, performs data reporting and command issuing through the WLAN wireless local area network, and monitors work parameters and state of the photovoltaic power generation equipment in real time. The distributed photovoltaic power generation on-line monitoring system of the present invention has the advantages that: 1, the work state of the distributed photovoltaic power generation equipment is monitored and released in real time; and 2, the wireless local area network is established for performing data communication of parameters of the distributed photovoltaic power generation equipment.