考虑节点惯量的新型电力系统连锁故障仿真模型及关键节点辨识OA

In a new type of power system,the large amount of access to new energy generation decreases the rotational inertia of the whole system,which leads to the increased risk of interlocking faults.To address this problem,a simulation model of grid interlocking faults taking into account the node inertia is proposed.Considering the load ratio,voltage limit,and node inertia of the grid nodes,the state of the grid components and the state transition rules in the model are determined through the electrical coupling relationship between the nodes and the support of the inertia.Then,the integrated system integrity index,the relative value of loss load,and the system load ratio are given as the comprehensive weakness index for recognizing the critical nodes of the power grid.Finally,using the IEEE39 grid arithmetic and grid data of a province,the critical nodes of the grid are identified using the integrated weak degree index under different new energy percentages,and the simulation results verify the reasonableness and feasibility of the constructed model.In turn,it provides a reference for the prevention of cascading failures in new power systems.