As opposed to UPS systems with centralized parallel architecture, which have some degree of hierarchical centralized control or centralized hardware, as example, static bypass, the ABB paralleling system has been designed to decentralize virtually the entire UPS hardware and software. It includes a wide range of distributed technology: distributed control intelligence, distributed control circuits and distributed power circuits. Decentralized architecture increases the level of redundancy in the system and allows for the highest fault tolerance – securing maximal uptime for the critical load.
ABB’s Decentralized Paralleling Architecture (DPA)
means that Conceptpower DPA 500 is composed from modules which are each equipped with all essential parts of a double conversion UPS. As modules are able to operate fully independently of each other, they are also fully redundant with each other. This is what makes the system so reliable and fault tolerant.
Each module in a Conceptpower DPA 500 system has all the essential parts of a UPS and is so able to operate fully independently: Rectifier, inverter, battery converter, static bypass switch and back-feed protection. Each module also has its own display for monitoring and control. System level graphical touch screen display is further used to monitor the complete multimodular system, but the modules are not dependent for its operation.
Online swappable modules can be removed, added or replaced without need to switch off the UPS or switch the load to be supplied by raw mains. Smart connectors for each UPS module secure that disconnection of a module for service can always be done safely without jeopardizing load.