Integrated Power Supply System Solution for Hospital

I. Project Overview

As a core regional medical landmark in Shenzhen, the hospital covers diverse functional areas including outpatient buildings, inpatient buildings, medical technology buildings, and scientific research buildings, with 1,440 planned parking spaces. It needs to meet comprehensive electricity demands such as medical treatment, scientific research office, daily operation, and supporting charging piles. Guided by the core principles of “safety redundancy, precise adaptation, intelligence and efficiency”, we have tailored a full-scenario electrical design solution to build a solid energy guarantee for the hospital’s high-quality operation.

II. Core Challenges

Dense and Diverse Loads: Concentrated loads from medical equipment, air conditioning and refrigeration, scientific research instruments, etc., with significant power density differences (60-300W/m²), requiring extremely high power supply stability.
Strict Safety Standards: As a life-support building, it must meet fire linkage, emergency power supply, and civil air defense wartime requirements to eliminate power outage risks.
Special Supporting Requirements: Need to construct 432 slow-charging piles (7kW each) with 100% reserved installation conditions, demanding an independently planned power distribution system.
Complex Spatial Layout: Multiple building functional zones require scientific planning of high-voltage electrical wells and pipeline routes to avoid back-and-forth power supply and pipeline conflicts.

III. Customized Solutions

Triple Power Supply Guarantee for Uninterrupted OperationAdopt a triple architecture of “3 10kV dedicated lines + diesel generators + UPS”: 3 independent 10kV dedicated lines supply power, and the remaining two lines ensure full-load operation when one line is under maintenance; 3 1500kW diesel generators (divided into 2 machine rooms) are configured to meet 3-24 hours of emergency power supply; 4 300kW generators are installed in the civil air defense area to adapt to the wartime power demand of the central hospital, achieving zero interruption of critical loads.
Scientific Power Distribution Layout for Precise Load Adaptation

Substation Planning: 3 substations on the basement first floor with a total capacity of 21,250kVA (10 sets of 2000kVA + 1 set of 1250kVA dry-type transformers), with a load rate controlled at 72%-77% and sufficient expansion space reserved.
Zoned Power Supply: Power supply ranges are divided by department and functional area. Large equipment is directly supplied with low-voltage outgoing lines, small-capacity public loads adopt T-junction box mode, vertical trunk lines for large loads use enclosed busbars, and small loads use cables to improve power supply efficiency.
Charging Pile Supporting: An independent transformer is configured to supply power to 432 charging piles via dedicated lines, with simultaneous reservation of equipment rooms and installation conditions.

Intelligent System Configuration to Strengthen Safety Protection

Automatic Fire Alarm System: Adopts a centralized alarm + ring structure design, covering 12 major systems including detection and alarm, linkage control, and emergency broadcasting. The fire control room implements centralized management and control, and fire display panels are set by department.
Intelligent Operation and Maintenance: An intelligent lighting system is adopted in the basement, and electrical equipment is equipped with monitoring modules to realize real-time status monitoring and fault alarm.
Pipeline Planning: High-voltage electrical wells are set following the principle of “fewer bends, closer to loads”, and weak-current wells are planned according to a 90m laying radius, ensuring scientific and orderly pipeline routes.

Precise Equipment Selection to Adapt to Scenario Needs

High-voltage side: 52 sets of KYN-28 medium-voltage switchgear are adopted for radial power supply.
Low-voltage side: 120 sets of GCK withdrawable switchgear and 3 DC screens are configured.
Transformers: SCB14 series with IP2X protection level are selected, balancing safety and energy efficiency.
All equipment reserves 20% of cabinet space to meet future expansion needs.

IV. Project Value

Safe and Reliable: Triple guarantees + comprehensive protection ensure the continuous operation of medical equipment and emergency systems, complying with civil air defense wartime standards.
Strong Adaptability: Precisely matches the power density needs of different areas, with independent power distribution for charging piles to meet diverse scenario electricity demands.
Efficient and Energy-Saving: Intelligent lighting + optimized power distribution lines reduce energy consumption losses, and reserved expansion space lowers later transformation costs.
Industry Benchmark: Integrating conventional power supply, emergency guarantee, and civil air defense needs, it provides a replicable solution for the electrical design of large general hospitals.

V. List of Key Equipment

High-voltage switchgear (KYN-28 type), dry-type transformers (SCB14 series), low-voltage withdrawable switchgear (GCK type), diesel generators, DC screens, UPS uninterruptible power supplies, charging piles, fire alarm controllers, enclosed busbars, cable lines, etc.