Enterprise power grid isolated operation solution is applicable for enterprises with high power consumption and relatively high power cost, such as iron and steel metallurgical, electrolytic aluminum, industrial silicon, cloud computing center, papermaking, etc.; or the enterprises that are located in remote areas (such as islands and Gobi) and cannot rely on large power grids to supply power. It allows the enterprise to supply power to the production load with their own power plant, so that the enterprise can generate power for their own use. This realizes the recycling of energy, and safe and stable operation of the power grid.