DELAYED POWER SYSTEM STABILITY ANALYSIS METHOD BASED ON LOW-ORDER EIGD

摘要

Disclosed in the present invention is a delayed power system stability analysis method based on low-order EIGD, comprising: establishing a delayed power system model for a power system, and linearizing the delayed power system model, i.e., expressing the delayed power system model by means of a delayed differential equation; re-sequencing state variables of the delayed power system in the delayed differential equation, and dividing the state variables into delay-independent state variables and delay-dependent state variables; transforming the delayed differential equation into an ordinary differential equation by using an infinitesimal generator, thereby equivalently transforming a characteristic equation of the delayed power system into an ordinary characteristic equation, and further transforming calculation of characteristic values of the delayed power system into calculation of characteristic values of the infinitesimal generator. According to the present invention, by re-sequencing the state variables of the system, discretization of the delay-independent state variables is removed, the number of dimensions of a discretization matrix is reduced, and therefore, the calculation amount of key characteristic value calculation of a DCPPS is reduced.