Ring Bus UPS Architecture for Redundant Critical Power
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Solution Overview
Problem
Conventional uninterruptible power supply systems for critical industries like data centers face inefficiencies and increased points of failure due to complex control systems and multiple power sources, leading to higher operational costs and potential power interruptions.
Innovation Solution
The electrical system incorporates a ring bus architecture with medium and low voltage generators, uninterruptible power supplies (UPS) in parallel, and power electronic switchgear, along with energy storage devices and transformers, to create a redundant and efficient power distribution network that simplifies control and reduces failure points, utilizing double-conversion UPSs and static transfer switches for improved efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional uninterruptible power supply systems use complex control systems and multiple power sources, then power supply capability is improved, but system reliability deteriorates due to increased points of failure
Solution Approach 1:
The system divides the power supply into multiple independent segments (utility power source and generator power source) that can operate independently. Each segment has its own control system, so a failure in one segment does not affect the other, maintaining overall system reliability while providing comprehensive power supply capability.
Solution Approach 2:
The system changes the operational parameters of different power sources based on conditions. The utility power source operates during normal conditions, and the generator power source activates during interruptions. This parameter change allows the system to maintain reliability by using the most reliable source available while ensuring continuous power supply capability.
2Reliability
If conventional systems use multiple power sources and complex control systems, then power supply redundancy is improved, but device complexity increases
Solution Approach 1:
The system introduces an automatic transfer switch as an intermediary device that simplifies the interaction between multiple power sources. Instead of complex control systems managing multiple sources directly, the transfer switch automatically selects and switches between the utility power source and generator power source, reducing system complexity while maintaining redundancy.
Solution Approach 2:
The system enables self-service operation where the automatic transfer switch autonomously monitors power source availability and performs switching operations without requiring complex external control systems. This self-service capability reduces device complexity by eliminating the need for sophisticated control architecture while maintaining power supply redundancy.
3Productivity
If conventional systems use complex control systems, then power management capability is improved, but operational costs increase
Solution Approach 1:
The system replaces complex electronic control systems with a simpler automatic transfer switch mechanism that uses basic electrical sensing and switching. This substitution maintains adequate power management capability by automatically detecting power interruptions and switching sources, while reducing operational costs by eliminating the need for complex control electronics and their associated maintenance and energy consumption.
Data Source
AI summary
Electrical systems for providing uninterruptible power to a critical load. One electrical system includes a ring bus, multiple power blocks including one or more generators electrically coupled to the ring bus, and uninterruptible power supplies (UPSs) electrically coupled to the ring bus. In some aspects, the electrical system includes a UPS switchgear electrically coupled between the ring bus and the UPSs. In other aspects, the UPSs are electrically coupled together in parallel. Another electrical system includes a utility switchgear, UPS blocks electrically coupled together in parallel and electrically coupled to the utility switchgear via transformers, low voltage (LV) power blocks electrically coupled to the UPS blocks, and medium voltage (MV) switchgear electrically coupled to the UPS blocks via transformers. Each of the LV power blocks include one or more generators.