Application Of Parametric Control Method In The Stability Power System

Power system is a multi-dimensional,strong nonlinear dynamic large-scale system,including a lot of uncertain factors and unknown.With the rapid development of the power system interconnection,the power system becomes more and more complicated,exposing many problems that threaten the safe and the stable operation of the system.Power system instability will undoubtedly bring great losses and serious disasters to the national economy and people's lives.Therefore,to improve the stability of power system operation has become the focus of current study.It is an effective way to apply control technology from the structural characteristics of power system.The main contents of the paper are as follows:Firstly,the significance of the stability of the power system,the main object of the study and the various control methods for the power system are introduced.The advantages and disadvantages of the conventional control mode are described respectively.The applicability of the parametric control method of power system in this paper is analyzed.In this paper,the parametric control method is improved,the robust optimization index is added,and the obtained parameterized control method is applied to the power system.The central idea of the parametric control method is to establish the parametric expression of the control law,substituted the optimized degree of freedom of the system and then to enter the expression to obtain the control law.According to the actual situation of power system,several new performance indexes are added.Secondly,the parametric control method is applied to the model matching of the linear system.For the linear invariant and linear discrete periodic systems,robust parameters are added to the objective function of the optimized design,and the numerical examples are simulated to verify the effectiveness of the parametric control method.On this basis,3% step response and three-phase short-circuit experiment are carried out on the mathematical model of the infinite system of power system,and the optimal quadratic control method is adopted as the contrast.Based on the analysis and interpretation of the simulation results,the parametric control method not only has a short quiescent oscillation time less than 3s,but also has good robustness.The experiment proves the practical application value of the parametriccontrol method in the power system.