Power System Electromagnetic Wave Theory Based Frequency Wave Transmission Difference Coefficient

Under the condition of large-scale grid connection of new energy, the problem of reduced system inertia level and uneven spatial distribution is becoming increasingly prominent. The total inertia index of the traditional synchronous machine system from the perspective of the Center of Inertia (COI) cannot accurately measure the spatial difference of the frequency dynamic response of the system after disturbance. To describe the relationship between the spatial differences in system structure and inertia distribution and the differences in system frequency response, starting from a new perspective of electromagnetic wave theory, a relationship function between frequency wave transmission coefficient and system topology, inertia distribution, and line susceptance is constructed; Secondly, a continuous processing method for the discrete model of the power system is proposed, and a transmission coefficient matrix and a transmission difference matrix are established to reflect the degree of closeness and difference between generator nodes; Finally, an analysis was conducted on the grid like power grid model using PSD Power Tools.