This paper addresses the problems of low operation efficiency, high human resource consumption and insufficient safety guarantee of the traditional power supply system, and proposes a solution for the integration of AC and DC in intelligent substations, which realizes the. This paper addresses the problems of low operation efficiency, high human resource consumption and insufficient safety guarantee of the traditional power supply system, and proposes a solution for the integration of AC and DC in intelligent substations, which realizes the. Telecommunication for utilities has a long history in the transmission level of the power supply system and Siemens was one of the first suppliers of communication systems for power utilities. Since the early 1930s Siemens has delivered power line carrier equipment for high-voltage systems. In. The AC/DC integrated power supply system for substations uses system technology to propose solutions for the overall AC, DC, inverter, and communication power supplies for substations based on actual problems and development status. At present, relevant production and research and development. Hitachi Energy has the unique ability to design, supply and install the entire electrical system from the grid substation to the miniature circuit breaker at the server, utilizing reliable and robust systems and products. Hitachi Energy offers an advanced solutions including the construction of. Abstract: As a necessary power source for substations and other important power-using places, substation power supply system provides working power for important loads such as control devices, relay protection, communication equipment and fire security systems. This paper addresses the problems of. Remote Terminal Units (RTUs) are integral to substation automation. RTUs collect data from various sensors and devices within the substation and transmit this information to the control center. EVNSPC's goal is to implement a solution that facilitates substation automation, which would enable high-value, efficient, and reliable operations for the substation. Substations must feature a communication system that allows the.