Driven by the multi-dimensional evolution of generation

grid and load

the morphology of urban power grids is experiencing radical changes and unprecedented challenges. Therefore

it is urgent to investigate the underlying evolutionary mechanism and to design a rational development roadmap. First

the current morphology of urban power grids and the challenges faced are analyzed. Second

existing literature is reviewed from three perspectives

namely

morphological analysis

urban distribution power grid improvement

and urban transmission power grid improvement. Specifically

the section on morphological analysis covers statistical-characteristic analysis

weak-link identification

and evolutionary-trend analysis. Urban distribution power grid improvement methods are discussed in terms of network-structure reinforcement

integration of new elements

and adoption of novel power-supply modes. Urban transmission power grid improvement approaches are summarized from both theoretical foundations and relevant engineering practices. Finally

this paper put forward prospects in the future development direction of power-grid morphology from the perspectives of theoretical methods and technologies

aiming to provide a reference for follow-up research on urban power-grid morphology.