Containerized Substation Product Introduction

1. Product Brief Introduction

The containerized substation is an integrated complete set of power distribution equipment built on the basis of standard container shells. It integrates transformers, high and low voltage switchgear, protection and monitoring, reactive power compensation, metering and communication core components into a container-type closed cabinet. It has the characteristics of standardization, modularization, mobility, and can be quickly constructed, temporarily powered, and deployed on-site. The power distribution demand for fixed and mobile prefabricated substations in the field is more adaptable. The cabinet has high protection and weather resistance characteristics, and is widely used in various temporary and fixed power distribution scenarios compared with traditional civil-built substations and prefabricated substations.

2. Scope of Application

• Temporary power supply scenarios: Construction engineering construction sites, temporary event venues, emergency rescue sites, post-disaster reconstruction temporary power distribution
• New energy supporting: Step-up and power distribution of centralized photovoltaic/wind power stations, energy storage power stations, supporting of optical storage and charging integrated power stations
• Remote area power distribution: Temporary production lines in mining areas, large highway service areas, port terminals, outdoor fixed/mobile power supply
• Industrial park power distribution: Temporary power distribution in industrial parks, fixed power supply in port and wharf processing areas
• Urban emergency supporting: Urban power grid transformation, temporary commercial business, temporary power supply and emergency backup power for municipal engineering construction
• Voltage level adaptation: 10kV/35kV incoming line, 0.4kV outgoing line, covering power distribution demand with capacity of 500kVA-5000kVA

3. Model Definition (Industry Universal Compilation Rules, Taking 35kV/10kV Mainstream Specifications as Examples)

The model number of containerized substation is compiled by container characteristic code + prefabricated substation code + voltage level + transformer capacity + extended characteristic code, such as JZX-YBM-35/0.4-1600-Z, the definition of each part is as follows:

• JZX: Container substation exclusive code, J - Container type, Z - Combined type, X - Standardized, which is different from conventional prefabricated substation
• YBM: General code for prefabricated substation (Y - Prefabricated, B - Substation, M - Sealed type), adapted to container closed structure
• 35/0.4: Rated voltage, 35kV on high voltage side (mainstream medium voltage specification), 0.4kV on low voltage side; 10kV specification is marked as 12/0.4
• 1600: Rated capacity of main transformer, unit kVA, common specifications are 800/1000/1600/2000/2500/3150kVA
• Extended code: G - Outdoor type/L - Mobile type/Z - Intelligent type/F - Photovoltaic and wind power dedicated/Y - Emergency type, marking exclusive scene characteristics

4. Main Technical Parameters

4.1 High Voltage Side (10kV/35kV)

• Rated Voltage: 10kV (10kV system), 35kV (medium voltage system)
• Rated Current: 630A/1250A/2000A
• Rated Short-Circuit Breaking Current: 16kA/20kA/25kA (35kV), 20kA/25kA/31.5kA (10kV)
• Switch Type: Vacuum circuit breaker (VS1 type) / SF6 circuit breaker, equipped with electric operating mechanism, supporting remote closing and opening
• Grounding Mode: Neutral ungrounded / grounded via arc suppression coil (35kV), neutral point directly grounded (10kV)
• Protection Configuration: Standard configuration of Class II surge protection device (SPD), five-prevention interlock on high voltage side, complying with electrical safety specifications

4.2 Transformer Part

• Type: Oil-immersed S14/S15 (outdoor high-power, mobile scene mainstream), dry-type SCB15/SCB16 (indoor/explosion-proof scene), all meeting national standard Grade 1 products
• Rated Capacity: 500kVA-5000kVA (1000-3150kVA commonly used for container substations)
• Impedance Voltage: 6%~8% (industrial/new energy standard configuration), 10%~12.5% (unbalanced load)
• Connection Group: Dyn11 (industrial/new energy standard configuration, adapting to unbalanced load)
• Insulation Level: Dry-type F/H level, oil-immersed A level, temperature rise value meets long-term full-load operation requirements
• Cooling Method: Oil-immersed natural cooling (ONAN) / forced air cooling (OFAF), dry-type natural cooling (AN)

4.3 Low Voltage Side (0.4kV)

• Rated Voltage: 400V/230V (line voltage/phase voltage)
• Rated Current: 1250A/2000A/2500A/3150A
• Rated Short-Circuit Breaking Capacity: 50kA/80kA/100kA, equipped with high-power distribution short-circuit protection
• Reactive Power Compensation: SVG dynamic reactive power compensation device, compensation capacity 50~300kvar, power factor compensated to ≥0.95
• Outgoing Circuits: 8-32 circuits (customizable), equipped with molded case circuit breaker (MCCB), supporting branch protection and metering
• Metering Function: Standard configuration of three-phase multi-function energy meter, supporting forward/reverse electric energy metering, data can be remotely transmitted

4.4 Intelligent and Supporting Parameters

• Monitoring Function: Real-time monitoring of high and low voltage side voltage, current, power, electric energy, transformer temperature, cabinet temperature
• Communication Function: RS485/Modbus/4G/5G Internet of Things module, supporting docking with power grid dispatching and remote monitoring platform
• Supporting Facilities: Standard configuration of cabinet dehumidification, ventilation, lighting, fire protection devices (dry powder fire extinguisher), mobile traction device
• Protection Level: Overall cabinet IP54/IP65, internal components IP20/IP23, adapting to outdoor multi-environment use

5. Working Conditions

5.1 Environmental Conditions (Adapting to Container Movement and Outdoor Installation Characteristics)

• Ambient Temperature: -40℃~60℃ (temperature range design), withstanding high altitude, extreme cold and high temperature extreme environments
• Relative Humidity: ≤95% (at 25℃), allowing temporary condensation, cabinet is equipped with dehumidification device to prevent internal condensation short circuit
• Altitude: ≤3000m, customized derating design for altitude >3000m, adapting to plateau mines and photovoltaic power stations
• Vibration Requirement: Withstanding highway/railway transportation vibration (acceleration ≤3g), mobile type is equipped with shock absorption device as standard
• Environmental Requirement: No strong corrosive gas, no severe impact, no flammable and explosive medium; withstanding outdoor harsh weather such as heavy rain, snow, sand and dust

5.2 Electrical Working Conditions

• Power Frequency: 50Hz±2Hz
• Voltage Fluctuation: High voltage side rated voltage ±10%, low voltage side rated voltage ±7%, withstanding power grid and load voltage fluctuation
• Load Characteristics: Adapting to inductive/capacitive mixed load, intermittent load (new energy), impact load (industrial construction)
• Installation Method: Fixed type (grounded on concrete foundation), mobile type (container truck type, traction transportable), installation site flatness ≤5mm/m
• Gird-connection Requirement: Complying with GB/T 17467-2019 "Prefabricated Substation" and "Code for Grid Connection of Power Systems"

6. Performance Characteristics

• Standardized and modularized, high construction efficiency: Based on standard container shell design, all components are pre-assembled, debugged and inspected in the factory, no secondary construction on site, only need to complete foundation fixing and incoming/outgoing line wiring, installation and commissioning can be completed within 24 hours, greatly shortening the power engineering construction cycle.
• Strong mobility, adapting to temporary power supply: Equipped with mobile traction device, shock absorption and anti-seismic structure, can be quickly transported by highway/railway to the operation site, can be put into operation immediately after landing, perfectly adapting to mobile power supply needs such as engineering construction, emergency rescue and temporary power distribution.
• High protection level, excellent weather resistance: The overall cabinet adopts container special cold-rolled steel plate, with anti-corrosion, anti-ultraviolet and waterproof treatment, protection level IP54/IP65, withstanding extreme temperature difference of -40℃~60℃, heavy rain, sand and dust and other outdoor harsh environments, service life ≥20 years.
• Wide capacity coverage, adapting to multiple scenarios: Transformer capacity 500kVA-5000kVA, supporting 10kV/35kV dual voltage level incoming lines, meeting power distribution needs of different capacities and scenarios such as new energy power station step-up, industrial high-power power distribution, remote area fixed power distribution, with high customization degree.
• Intelligent operation, unattended: Equipped with a complete set of intelligent monitoring and control system, real-time monitoring of equipment operation parameters and cabinet status, automatic fault alarm and remote closing/opening, supporting 4G/5G wireless communication and data remote transmission, adapting to unattended scenarios such as mines, photovoltaic power stations and remote service areas.
• Compact structure, saving floor space: Integrated container structure, integrating all power distribution components, no need to build external distribution room, floor area is only 1/4 of traditional civil-built substation, can be directly arranged in outdoor open space and construction site, saving land resources and infrastructure costs.
• Safe and reliable, complete configuration: Five-prevention interlock on high voltage side, surge protection, short circuit protection and over-temperature protection are standard on high and low voltage sides, dehumidification, ventilation and fire protection devices are equipped in the cabinet, all components adopt national industrial grade products, withstanding transportation vibration and on-site load fluctuation, low failure rate and safe and stable operation.
• Strong expandability, flexible upgrade: Modular internal layout, reserved expansion interface, can flexibly increase outgoing circuits and reactive power compensation capacity according to subsequent load growth, and can also upgrade intelligent monitoring and communication modules, adapting to the later upgrade and reconstruction needs of power distribution system.