A Novel Control Strategy to Improve Stability and Performance of a Synchronous Generator Using Jacobian Gain Control

This paper proposes a novel control strategy to improve the stability and performance of the linear feedback control (LC) by alleviating the nonlinearity of a synchronous generator (SG). This control strategy, Jacobian gain control (JGC), uses the Jacobian function (JF), which is the sensitivity between the power imbalance in an electrical power system (EPS) and the state variables of SGs, for control. The JFs composed of a combination of state variables of an SG were established by the Jacobian reflecting physical characteristics of SG control. An integrated controller, JGC, for the SG was constructed by applying the JFs to the models of the governor (GOV), excitation system (EX), and power system stabilizer (PSS), respectively. The effects of JGC were identified by frequency response analysis of a single machine infinite bus (SMIB) model. The comprehensive control performance and stability of JGC were verified through various case-by-case time-domain simulations on two-area and IEEE 39-bus system configured by MATLAB/Simulink.