A Coordinated Preventive Control Optimization Method of Small Signal and Transient Stability Based on Sensitivity Analysis

In this paper, a coordinated preventive control optimization method based on sensitivity analysis is proposed to improve both small signal and transient stability. The mathematical model based on sensitivity analysis is presented for the coordinated preventive control optimization problem of small signal and transient stability. The nonlinear optimization model is transformed into a quadratic programming model by linearization the constraints through sensitivity analysis, so as to be solved by the ordinary quadratic programming method. In this paper, the computing flow of the coordinated preventive control is presented as well as the selection principle of control generators. A State Grid Cooperation of China (SGCC) 9177-bus system is utilized to validate the proposed method. The results verify the effectiveness of the coordinated preventive control optimization strategies for both small signal and transient stability. After the control strategies are implemented, the system can meet the requirements of both small signal and transient stability.