By the end of 2019, there were a total of 31 110kV public substations in the grid area of City A’s power supply bureau, including 12 indoors and 19 semi-outdoors, with a total of 60 main transformers and a substation capacity of 2757.5MVA; there were a total of public and private substations within City A. There are 44 110kV lines, with a total line length of 419.437km, of which the overhead line length is 357.683km and the cable line length is 61.754km.
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