What does the pc section of the main building of the power plant mean?

PC is the abbreviation of power centrol. The PC section is connected by a single bus section, and two transformers supply power to the half section, both of which operate at half load. When the fault of one transformer is removed, the bus section switch is automatically closed, and the other transformer supplies power to the whole bus section. This is the power supply technology introduced from the United States after the reform and opening up.