The Study On Steady-state Power Flow Control By Generator Regulation And Its Differential Sensitivity

Power flow calculation has always been an important analysis tool for steady-state analysis of power system. However, with the continuous expansion and development of power system, power flow calculation can no longer meet the needs of the analysis and research on power system, mainly as it can not give a clear regulation and control measure for the electrical operating parameters which the system is more concerned about. So, this paper analyses and describes the operation behavior of modern power system from the mathematical point, and converts its electrical operation characteristics to the corresponding mathematical model——the model of steady-state power flow control. At the meanwhile, the model relaxes its operation parameters for the controlled adjusting variables, due to the operation mode of generators plays a vital effect on the distribution of load flow. So that it can according to the operational requirement of the system to adjust the final operational status of the generators, and guarantees the solution of the model——the number of equations be equal to the number of variables. Thus, the paper improves the structure system of the model of steady-state load flow control considering the regulation of generators.In the solution of the model, in order to simply the solution and assurance fast convergence, this paper uses the manner of simultaneous solution for solving. Further-more, it also derived an analysis method for differential sensitivity so as to avoid the extremes of Jacobi matrix, such as highly sparse or singular, which solves some of the numerical solution problem under the simultaneous solution mode and finally forms the entire solution system based the differential sensitivity.At last, through a series of simulation examples, the paper tests the specific effect in practical applications on the steady-state power flow control model considering the regulation of generators. The simulation results show that, the solution based on the differential sensitivity has good convergence properties and can effectively solve the steady-state power flow control problem.