Abstract: The power grid operation mode of Zhejiang Petroleum&Chemical enterprise is variable, The connection between the self-contained unit and the external large power grid is weak, There is local isolated network risk; The power grid has only five circuit lines connected to the two substations of the external power grid, There is a risk of tidal current exceeding the limit; Weak internal structure of enterprise power grid, Tripping of a single element will cause overload and frequency voltage problems, Prominent problems in stable operation of power grid, It restricts the safe and efficient production of enterprises; This paper analyzes and formulates reasonable control measures for the stability of Zhejiang Petroleum&Chemical power grid. At the same time, combined with the principle of PCS safety and stability control device, it puts forward the configuration scheme and control scheme of Bailian enterprise power grid.