Over the past 20 years, the power supply in Dongguan has grown rapidly, and the scale of the power grid has been continuously expanded and optimized. From 65438 to 0988, Dongguan was upgraded from a county-level city to a prefecture-level city, and the power supply in that year was only 948 million kWh. By the end of 1988, 22 substations (220kV 1,10kv14, 35kV) with a capacity of 683,500kva of main transformer and 436.4km of transmission lines have been in operation in Dongguan. 20 1 1 year, the power supply in Dongguan reaches 57.935 billion kWh, with the highest load 10850900 kW. By the end of June 20 12, Dongguan Power Supply Bureau had operated1152 substations (including 4 500 kV substations, 26 220 kV substations and 22 main transformer capacity substations 1 122).
With the development of the network through science and technology, the technological level of Dongguan Power Grid has made a qualitative leap. At present, there are 25 220kV substations and 1221100kV substations unattended in the city, and the proportion of unattended substations is 96.7 1%. Dongguan Power Grid has formed five major power supply areas centered on 500 kV Dongguan, Hengli, Guancheng, Shuixiang Substation and Shajiao Power Plant, and the power supply reliability and capacity have been greatly improved.