Substation automation technologies and advantages

Automated substations can provide the information needed to maintain uninterrupted power to the customer at a lower maintenance cost. Substation automation is the integration of smart electrical equipment (e.g., circuit breakers, transformers, relays, etc.) that has the ability to monitor their functionality. For example, circuit breakers are able to measure their contact resistance and acknowledge proper maintenance diagnostics. Automated substations consist of microprocessor-based relays, circuit breakers, transformers, and motor-operated air switches that are monitored by a graphical interface unit that can be remotely accessed. This article focuses on two substation automation projects that have been implemented at two Pacific Gas and Electric Company transmission substations, Cortina and Templeton.