The Spatiotemporal Changes of China's Inter-provincial Power Transmission Network from 2005 to 2020

Abstract

This study integrates the downscaling model of electricity production consumption, the balance equation of electricity inflow and outflow, and the actual connectivity between provincial power grids into a research framework, and develops a downscaling method for inter-regional power transmission data, thereby obtaining a complete inter provincial power transmission dataset. It was found that from 2005 to 2020, the source of power supply gradually shifted from the Central China Power Grid to the Southwest Power Grid. Sichuan, Yunnan, and some provinces in the southwest region have become important sources of electricity supply. The scale of power transfer from the source point and the scale of power transfer from the sink point are both showing an increasing trend, and the scale of inter provincial and inter regional power transmission is constantly expanding, resulting in a strengthening trend of the close density of network connections.