An improving Planning Method for the Receivingend System Considering Multiple Sources of Inertia Support

With the continuous construction of new power systems, more and more new energy sources replace synchronous motors and are integrated into the grid to provide electrical energy for loads, which leads to a continuous reduction in the level of inertia of the power system and weakens the inertia support of the system under active power shocks and frequency adjustment capability. Many research institutions have made different progress in the research on inertia of new power systems. However, there is still a lack of consideration of system inertia characteristics in power system planning. Therefore, in order to suppress the large change of system frequency caused by active power disturbance in the receiver system under the high proportion of new energy access, this paper proposes an inertia support planning method to improve the receiver system under the variable proportion of new energy access from the perspective of power system planning. First, the meaning and composition of the inertia of the power system are expounded and the minimum inertia required for the frequency stability of the system is analyzed. Secondly, considering the potential contribution of diversified resources of “source-network-loadstorage” to the equivalent inertia of the system, inertia resources including traditional synchronous generator inertia, load inertia and virtual inertia are considered. The inertia support planning model of receiver system is proposed to solve the problem of low inertia support of receiver system under high proportion of new energy access. Finally, the GAMS (The General Algebraic Modeling System) modeling and simulation is used to verify the effectiveness and feasibility of the proposed method and model.