Companhia de Electricidade de Macau (CEM) is a public utility company with the sole concession to transmit, distribute and sell high, medium and low voltage electricity in Macau. The total capacity of CEM’s power generation equipment is 472 MW.
The Macau electricity transmission network comprises 30 primary substations and 291 kilometres of 66kV high-voltage cables, 110kV cables and 220kV cables. The Guangdong-Macau electricity network included two 110kV cables and two 220kV cables. The two 110kV cables were connected to Gongbei Substation and Nanping Substation, while the two 220kV cables were connected to Gongbei and Zhuhai Substations, and to Qinyun Substation.
The 11kV medium-voltage electricity transmission network comprises 38 user substations and 1,369 user transformer rooms (11kV/400V) connected by cables with a total length of 681 kilometres. The low-voltage transmission network is made up of 814 kilometres of cable, while the street lighting network comprises 519 kilometres of cable and 14,634 streetlights. CEM’s power network is almost entirely comprised of underground cables.