Application field: Mission critical application；Real-time process control； Large interconnected networks； High-speed data processing for critical loads ；Occasions where a power failure may result in significant losses

The redundant parallel solution provides a highly reliable, highly available power guarantee solution, especially for mission critical environments that require uninterruptible power supply. The solution realizes redundant power supply by connecting multiple UPS (uninterruptible power supply) devices in parallel. Even if one UPS fails, the system can maintain normal operation and avoid the loss caused by downtime.

Program features:

Scalability: The system can be easily expanded according to demand, and supports N+1 redundancy and parallel operation. Users can add UPS units at any time to meet the needs of future load growth.

High reliability: When one UPS is faulty, the UPS automatically stops running and the remaining UPS automatically takes over all the load, ensuring the stable running of the system and preventing power interruption.

High availability: Even if one UPS fails, it does not affect the normal running of the entire system. There is no downtime to wait for repair, which greatly improves the mean time to failure of the system and maximizes the safety and continuous operation of the loaded equipment.

Dual redundant parallel solution:

In the dual-system redundancy scheme, two UPS devices work in parallel in 1+1 redundancy mode. Specific plans are as follows:

After two UPS devices are connected in parallel, the output voltages are combined through the PDC, and switch Q is used to supply power to loads.

If the load device requires two power supplies, the PDC provides two independent power supply paths to ensure that the two power supplies are satisfied (as shown in Q3 and Q4 of the Figure).

This parallel mode ensures uninterrupted power supply to load devices. Even if one UPS fails, the other UPS can still supply power to ensure device safety.

Reliability analysis of redundant parallel power supply:

To better understand the reliability of this redundant parallel scheme, assume that each UPS unit has a reliability of 99% (r=0.99). In the 1+1 redundancy scheme, the parallel operation of two UPS forms a more reliable power supply system.

In dual-system redundancy mode, even if one UPS fails, the remaining UPS can still supply 100% of the load, ensuring that the system is not affected. Through this design, the overall reliability of the system is greatly improved, and the risk of power failure or failure can be effectively reduced.

Reliability model:

Assume that the failure rate of each UPS device is 1%, that is, its reliability is 99%.

With parallel redundancy, the overall reliability of the system will be the result of two UPS devices working together. Even if one UPS fails, the remaining UPS can still provide a stable power supply, further enhancing system reliability.

Operation diagram

Power supply schematic diagram

In summary:

Redundant parallel solutions ensure stable power supply and high availability in mission-critical environments by working multiple UPS units in parallel. The system can be flexibly scaled according to demand, and has a high fault tolerance, which can effectively protect load equipment from power outages or failures. This makes redundant parallel solutions ideal for many critical industry applications, especially those where power reliability is a critical requirement.