Abstract：The development of modern power systems with wide span，low inertia，and complex structure

makes the frequency stability problem increasingly prominent，and the spatial-temporal distribution characteristics

of frequency are distinct. Taking the actual power grid as the object，the impacts of large-scale new energy access

and DC power control on the grid frequency response under disturbances and the characteristics of frequency

spatial-temporal distribution were analyzed. Firstly，based on the detailed time-domain simulation model，the

causes of the spatial-temporal distribution of node frequency were discussed from the perspective of the distribution

differences of disturbed power，inertia，and frequency regulation resources. The system-level and node-level

frequency response indicators that reflect the overall trend and distribution differences of grid frequency response

were proposed. Then，the impact mechanisms of factors such as the new energy power proportion，the distribution

of synchronous，the primary frequency regulation of new energy，and DC frequency limit control on the grid

frequency response under disturbances were analyzed. Finally，through simulation results of real power grid cases，

the impact of various factors on the grid frequency response and its spatial-temporal distribution characteristics was

quantitatively analyzed.

      Key words：power system；transient frequence response；spatiotemporal distribution；new energy access；

power disturbance