How Do We Distribute Power?
Power Distribution Improvements
Electric power delivered to your home or business is typically generated by power plants owned by independent power producers (IPPs). Power then travels over long distances via high-voltage transmission lines (138kV or 230kV) of the National Grid Corporation of the Philippines (NGCP), which are interconnected in a grid or network configuration.
From the transmission system, power travels by means of 138kV and 69kV sub-transmission lines to 19 VECO distribution substations with a total capacity of 1,193 MVA that are strategically located within its franchise area. From these substations, distribution lines operating at medium-voltage level of 23kV disperse the power throughout four cities and four municipalities within the VECO franchise area. The power then travels from the distribution line through a service transformer located in close proximity to your home or business establishment. Electricity enters the customers' premises at low-voltage levels (220 or 440V) through overhead conductors (wires) which connect to the kilowatt-hour (kWh) meter. From the meter, or point of service, power flows along conductors to the main panel which contains the main breaker.
The main breaker's duty is to provide protection for the entire facility. And finally, branch circuits deliver power for lights, appliances, and electric outlets within the residences while industrial and commercial facilities have additional branch circuits for heating, ventilation and air-conditioning. Thus, the 408,584 VECO customers (December 2016) are assured of an efficient and stable voltage level for utilization. As of December 2016, VECO registered its highest demand of 524 Megawatts (MW).
See illustration diagram: