A new integrated hybrid power supply system for telecom site sharing solution

Abstract

Site infrastructure sharing is the trend of future base station construction. Telecom infrastructure operators require for smooth upgrading and low TCO when sharing sites power supply, spaces and operation management. This paper introduces a new integrated hybrid power supply system suitable for the site sharing requirements. It perfectly combines many functions together, such as energy generation, conversion, control, distribution and metering, which support multiple energy access including solar, grid, many kinds of battery storage, -48V DC power output directly with multi-channel distribution for different operators loads and common platform management and control for smooth upgrading of site sharing. With the integrated variable speed generator inside, the system can maximize the fuel efficiency based on the actual load capacity; accordingly, fuel consumption could be reduced sharply at low load capacity. Two systems can work in parallel with a total power output, making the expansion of energy generation easily, which could be applied to meet the increasing electricity requirements when more operators add in. This solution is much better than that has been applied before. The system is designed in the way that both power conversion modules and intelligent power distribution units can be smoothly expanded. AC/DC and DC/DC conversion modules can be exchanged freely in the same slot position to shrink the volume of the system. Besides, different battery storage group also can be expanded by HBTS (hybrid battery transfer system, embedded structure). The electricity used by different operators could be metered by central supervising unit or intelligent electric meter. The system combines multiple hybrid energy solutions to cope with different site sharing scenarios to comprehensively reduce site sharing TCO. It helps telecom infrastructure operators invest capital step by step and maximize the ROI.