The invention discloses a multi-point linearized probability energy flow method of an
integrated energy system with
electricity converting to
natural gas. The method includes the following steps: firstly proposing an
energy hub model containing wind
electricity, thermoelectricity combined supply, and
electricity converting to
natural gas; then conducting quantitative analysis on precision of linearized energy flow equations of a
power grid and a
natural gas net, and subsequently making a conclusion that the precision of the linearized energy flow of the natural gas net is explicitly lower than that of the
power grid. Based on the conclusion, the invention provides a method for calculating the multi-point linearized energy flow. At the same time, the method takes into consideration of the relativity between electricity, natural gas and
thermal load and wind velocity, and based on a probability
density distribution function of undetermined energy flow injection, adopts the monte carlo
simulation method in generating random samples. For each random sample, the method adopts the multi-point
linearization method in calculating the energy flow. According to the invention, the method has high calculation efficiency, and at the same time has
linearization errors which are within an acceptance scope.