Network topology planning method for interconnecting large-scale renewable generators considering dynamic stability limitations

It is well-known that the connection of renewable generators (RGs) can result in stability issues. However, existing network topology planning methods primarily focus on economic factors and static safety constraints, often neglecting dynamic stability considerations. The aim of this study is to avoid the risk of oscillations at the planning stage, rather than addressing them through damping control after their occurrence. First, an index is proposed for numerically evaluating the impact of different network topologies on the stability of connecting RGs, concluding that parallel connection is the most stable among various topologies. Then, in scenarios involving multiple collection regions of RGs, a method is proposed to select the connection locations of RGs. This indicates that the distribution of wind generators should consider the transmission line length of collection nodes, rather than connecting all wind generators to one of them. Finally, the network topology planning steps from a dynamic stability perspective are summarized. It is meaningful to improve the stability of a power system connected by large-scale RGs without the need for additional damping control. Two case studies are conducted to validate the accuracy of the analyzed results, but in the future, more applicable examinations will be conducted.