Nonlinear Power Flow Calculation of Offshore Oilfield Power Grid Based on Improved PSO Algorithm

According to the characteristics of offshore oilfield power grid, a nonlinear programming power flow model considering the characteristics of source and load is established, and a power flow solving method based on improved PSO is designed. Firstly, frequency and slip ratio are introduced as flow state variables with voltage amplitude and phase angle, and three characteristic equations of the relationship between rotating load slip ratio, rotating load power, generator power and flow state variables are given, which are applied to the nonlinear programming model of power flow. Then, the improved PSO based on master-slave mode is used to solve the model. Master station divides subgroups and sets optimal solution archives. Slave station uses the Box-Muller Transform to initialize the subgroups and improves the evolution strategy by using individual inferior solution. The rationality of the proposed power flow model and the effectiveness of the algorithm are verified by the case.