How do DC Operating Power Supply Systems Support Stable Equipment Operation in Power, Industrial, Data Center and Rail Transit Sectors?

With the accelerated advancement of power automation, industrial intelligence, and new infrastructure, DC operating power systems have features like "uninterrupted power supply, strong anti-interference ability and high reliability"—they have become the "energy hub" that ensures critical equipment runs safely.

In 2024, the domestic market size of DC operating power systems was over 7.5 billion yuan. It grew by 25% compared to last year. These systems are widely used in the power, industrial, data center and rail transit sectors. They effectively solve the industry problem of "equipment shutting down because of power supply interruption". They also provide core support for the stable operation of all kinds of fields.

1. Power System: Ensuring Reliable Operation of Power Grid Automation Equipment

In power scenarios such as substations and distribution stations, DC operating power systems serve as the "core guarantee":

They mainly provide stable DC power for high-voltage circuit breakers, relay protection devices, and automated monitoring systems, adopting a dual-backup design of "battery bank + charger." After a power outage, they can maintain power supply for ≥8 hours, with a power supply reliability of 99.99% (far higher than the 99.9% of AC power supplies).

Data from a power grid company shows that for substations equipped with DC operating power supplies, the tripping accident rate caused by power supply interruption dropped from 1.8 times/year to 0.2 times/year, and fault handling time was shortened by 60%.

In addition, the system supports remote monitoring (real-time monitoring of battery capacity and output voltage), improving operation and maintenance efficiency by 40% and adapting to the "unmanned operation" trend of power systems.

2. Industrial Intelligent Manufacturing: Supporting Continuous Operation of Production Equipment

Core equipment in industrial production lines (e.g., automobile manufacturing, mechanical processing) such as PLCs (Programmable Logic Controllers) and DCS (Distributed Control Systems) have strict requirements for power supply stability:

DC operating power systems adopt a "high-frequency switching power supply + lithium battery bank" architecture, with an output voltage accuracy of ≤±0.5% and a ripple factor of ≤0.1%, avoiding equipment malfunctions caused by voltage fluctuations.

For high-interference scenarios such as welding and stamping, the system has anti-electromagnetic interference capability (EMC rating meeting EN 61000-6-2 standard), reducing equipment shutdown rate from 3.2% to 0.5%.

After application in an automobile factory, the annual continuous operation time of the production line exceeded 8,000 hours, an increase of 15% compared to power supply via traditional AC power.

3. Data Centers: Enabling Efficient and Energy-Saving Operation of Cloud Computing Equipment

With the development of cloud computing and big data, data center servers and storage equipment require "efficient and uninterrupted power supply":

DC operating power supply systems adopt a 240V high-voltage DC (HVDC) architecture, with an energy efficiency ratio of 96% (compared to approximately 92% for traditional UPS AC power supplies). This translates to an annual electricity saving of about 120,000 kWh for 10,000 servers.

They support "modular expansion," with a single module capacity of 50-200kW. Expansion can be completed without shutdown, adapting to the "on-demand capacity increase" needs of data centers.

Tests in a super-large data center show that after adopting DC operating power supplies, the failure rate of the power system dropped from 2.5 times/year to 0.3 times/year, and the availability of IT equipment increased to 99.999%.

4. Rail Transit: Adapting to Stable Power Supply in Harsh Environments

Signal systems, braking systems, and platform equipment of subways and high-speed railways need to withstand complex working conditions:

DC operating power supply systems have a temperature resistance range of -30℃~70℃ and a vibration resistance rating of IP65, ensuring stable operation even in high-temperature tunnel environments and under track vibration.

When powering subway signal machines, the output voltage stability is ≤±1%, ensuring no delay in train dispatching signals.

After application in a subway line, power supply interruption faults of the signal system dropped from 0.8 times/year to 0, and the train on-time rate increased to 99.98%.

Application Sector Core Application Equipment System Architecture/Features Key Measured Indicators

Power System High-voltage circuit breakers, relay protection devices Battery bank + charger, remote monitoring Power supply reliability 99.99%, accident rate reduced by 89%

Industrial Intelligent Manufacturing PLCs, DCS control systems High-frequency switching power supply + lithium battery, anti-interference Voltage accuracy ±0.5%, shutdown rate reduced by 84%

Data Center Servers, storage equipment 240V HVDC, modular expansion Energy efficiency ratio 96%, availability 99.999%

Rail Transit Signal systems, braking systems Wide temperature resistance & vibration resistance, IP65 protection Temperature resistance -30℃~70℃, on-time rate 99.98%

Currently, DC operating power systems are evolving toward "intelligence + low carbonization":

Equipped with AI battery health management systems (battery life prediction accuracy ≥95%), they reduce operation and maintenance costs.

Adopting lithium iron phosphate batteries (cycle life ≥3,000 times), their carbon emissions are 40% lower than those of lead-acid batteries.

As the "energy guarantee" for critical equipment, the expanded application of DC operating power supply systems will continue to drive the power, industrial, and digital economy sectors toward "high efficiency, stability, and low carbonization."