A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages.
Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control.
Another proven ability of MD3 is construction of GIS (Gas-Insulated Substation) and AIS (Air-Insulated Substation) which is used for the transmission of electricity produced by power plants. These are some of prominent substations which has been constructed by MD3:
132 KV Substation of Mobin Utility Project (GIS)
400KV of South Isfahan Gas Power Plant Project (AIS)
Expansion Bay 2 (E21, E04) of Mobin 132 kV Substation Project (GIS)
132kV Substation of Fajr 2 Project (GIS)
132kV Substation (No.1) of South Pars Centralized Power Plant Project (GIS)
132kV Substation (No.2) of South Pars Centralized Power Plant Project (GIS)
400kV Substation (No.3) of South Pars Centralized Power Plant Project (GIS)
Genaveh Substation Project (400 kV AIS)
132kV Akhtar Substation Utility of South Pars Gas Refinery Phases 15 & 16 GIS (33kV) & AIS(132kV)
230kV Substation of Damavand Power and Steam Project (GIS)
400kV Substation of Damavand Project (GIS)