Multi-Stage Dynamic Partitioning Method for Receiving-End Grid Based on Voltage Steady and Transient State

As the integration of high proportion renewable energy connecting the receiving-end power grid expands, the operational patterns and characteristics of power grid have fundamentally changed. Traditional steady state partitioning strategies are increasingly inadequate for modern new type power grid, thereby compromising their rationality and effectiveness. Therefore, this paper proposes a multi-stage dynamic partitioning approach for the receiving-end power grid that comprehensively considers steady-state and transient state, achieving reasonable and precise partitioning of power grid. The first stage comprises an initial categorization based on the sensitivity of reactive power to voltage during steady state periods. The process adheres to the geographical positioning and network topology constraints, ensuring that each segment incorporates adaptable reactive power generator. Then the transient voltage stability index feature is captured during different fault scenarios, which is employed for the second phase dynamic partitioning of power grid by using hierarchical clustering algorithms to further cluster on the basis of the initial partition. Finally, simulations of the improved IEEE 39-bus system are conducted to verify the rationality and effectiveness of the proposed method.