Abstract: According to the mathematical model of photovoltaic cells, a general engineering simulation model of photovoltaic cells is established in PSCAD software. The battery model utilizes the four parameters of the photovoltaic cell under standard test conditions, taking into account changes in illumination and temperature, and simulating the output characteristics of the photovoltaic cell under normal operating conditions. Based on the general engineering simulation model, the simulation model of the photovoltaic cell under the shadow occlusion is further established, and the load simulation is carried out. The simulation results show that the simulation model with or without shadow occlusion can simulate the output characteristics of photovoltaic cells under normal conditions. The model has good practicability and simplicity, and can meet the needs of engineering simulation and analysis.