Photovoltaic-based alternating-current and direct-current power supply system for long-distance water delivery trunk canal engineering

A photovoltaic-based alternating current and direct current power supply system for a long-distance water delivery trunk canal project is based on the photovoltaic power generation principle and comprises a photovoltaic assembly, the photovoltaic assembly is arranged on the top face of a supporting and covering structure erected above a canal and connected with a controller, and the controller is arranged in a water delivery trunk canal gate station and provided with a plurality of output loops. The controller outputs a DC voltage and then is connected to the energy storage battery, the inverter and the plurality of DC converters. The inverter is connected with the power distribution cabinet which is connected with an external AC power supply. The external alternating-current power supply serves as a standby power supply of the system and is led from a power grid near a gate station, and when the system operates normally, the external alternating-current power supply is switched off and is switched on when de