Through the analysis of photovoltaic grid-connected system

the grid controller’s functions have been discussed

and the hardware circuit of the grid-connected controller with the TMS320LF2812 as the core has been designed.In order to improve the controller’s real-time performance

the μCOS-Ⅱ is taken as the system software platform

and the priority for each task of grid-connected controller is identified by using RMS priority selection algorithm.Through the analysis of the overall mission of the system

here comes to a real-time multi-task correlation analysis between the interconnected structure

the task of designing specific methods are given.The experimental results show that the system under the control of the operating system is running well

and prove the correctness of the design.