Solar Power Compact Substation overview
Hengfengyou Electric Group has a mature design and manufacturing technology for photovoltaic step-up transformers. In view of the characteristics and complexity of the solar power generation system, it provides the solar power generation industry with a complete solution for step-up transformers, including oil immersed and dry type step-up transformers, as well as the step-up power transformer for the main transformer of the power grid. The products have many advantages, such as safety, reliability, energy conservation, and efficiency, Support the solar power generation industry to continuously improve the industry level.
- A Solar Power Equipment Compact Transformer that integrates 0.27kV 0.315kV 0.69kv 0.8kv voltage of grid-connected photovoltaic inverter into power grid output energy through a boost transformer
- High-voltage switchgear, transformer body and protective fuse are centrally placed in the oil tank. High-voltage/low-voltage pre-installed substation is set up together with low-voltage switchgear and corresponding auxiliary equipment
- Mainly used for small and medium-sized solar power generation
- Execution standard: IEC61850 series, GB/T17467, etc
Solar Power Compact Substation advantage
> Leading technology
- Standard anti-corrosion and salt spray environmental plan to meet the stringent environmental requirements of the site
- Compact structure, small footprint, easy installation
- Fully enclosed, fully insulated structure, safe and reliable operation
- Easy to operate, maintenance-free, low equipment cost
> Enclosure
- Adopt cold rolled high quality hot dip galvanized sheet
- The surface is treated by electrostatic spray, and the paint can not be taken off for 50 years
- Laser numerical control equipment cutting, drilling, bending, to ensure the processing accuracy
- Product structure is divided into three parts: high voltage chamber, low voltage chamber and transformer
- The cabinet is mainly pre-installed with: lightning arrester, load switch, transformer tap switch, protection fuse, oil level thermometer, oil level gauge, pressure relief valve, amount of oil discharge valve and other accessories
- The low-voltage side is equipped with main circuit breaker, overvoltage protector, and can be designed and installed in complete sets of automatic measurement and intelligent control system
- The transformer is a low loss oil-immersed transformer produced by Hengfeng You Electric
> Functional units
- Fully sealed structure, using the transformer insulating oil as the insulating medium and heat dissipation medium, overall has the advantages of compact structure, good heat dissipation performance
- The high-voltage indoor door should be equipped with electromagnetic lock and live display. When the high-voltage side is live, the high-voltage chamber door cannot be opened. The external door of the box transformer should be equipped with mechanical lock to meet the five requirements of high-pressure products and ensure personal safety
> Components
- Choose high-quality brand components such as Chint, Shanghai People Electric, Changshu Electric, etc
- Schneider, ABB high-quality partners
> Supplementary material
- High quality tin - plated busbar copper bar, with insulation sleeve
- Hanhe cable is selected for secondary wiring
> Processing and assembly
- Assembly workers have been trained for at least 6 months
- Secondary wiring is fully automatic equipment cutting to ensure reliable wiring
- Use power tools to ensure proper torque for bolting reinforcement
- The copper wire bus is NC punched and bent
- All kinds of experimental tests before leaving the factory to ensure normal operation
Solar Power Compact Substation FAQ
1. What is a Solar Power Compact Substation?
A Solar Power Compact Substation is an integrated electrical unit designed to step up or step down voltage levels in solar power plants. It combines transformers, switchgear, and monitoring systems in a compact, pre-assembled enclosure for efficient power distribution.
2. What are the main components of a Solar Power Compact Substation?
Key components include:
Step-up transformer (for PV plants)
LV/MV switchgear (circuit breakers, isolators)
Protection & control systems (relays, SCADA)
Cooling system (air or liquid-cooled)
Surge protection & grounding
3. What are the advantages of using a Compact Substation in solar plants?
Space-saving design** (prefabricated, modular)
Faster installation** (reduces on-site work)
Enhanced safety** (enclosed, weatherproof)
Improved efficiency** (reduced transmission losses)
Scalability** (suitable for utility-scale & commercial solar farms)
4. What voltage levels do Solar Compact Substations support?
Typically, they handle:
Low Voltage (LV): 400V - 690V (inverter output)
Medium Voltage (MV): 11kV, 33kV, or 35kV (grid connection)
5. How does a Solar Compact Substation improve grid integration?
It ensures stable power conversion from solar PV arrays to the grid, with features like:
Reactive power compensation
Voltage regulation
Grid compliance (IEEE, IEC standards)
6. What maintenance is required for a Solar Compact Substation?
- Regular thermal inspections (IR scans)
Oil/gas analysis (for transformers)
Cleaning & ventilation checks
Protection system testing
7. Can it be used in harsh environments?
Yes, most are built with:
IP54/IP65-rated enclosures(dust/waterproof)
Corrosion-resistant materials
HVAC/cooling systemsfor extreme temperatures
8. How long does installation take?
Deployment is faster than traditional substations—typically 2-4 weeks, depending on site conditions.
9. What safety features are included?
Arc-flash protection
Fire-resistant barriers
Emergency shutdown systems
Remote monitoring (IoT-enabled diagnostics)
