Energy Storage Solutions
Complete Power Equipment for Battery Energy Storage Systems (BESS)
Overview
QDTB® delivers integrated power equipment solutions for battery energy storage systems (BESS), from utility-scale grid storage to commercial behind-the-meter installations. Our transformers and substations are specifically designed to handle the unique bidirectional power flows, harmonic characteristics, and rapid cycling demands of modern battery storage systems. With solutions supporting lithium-ion, flow battery, and emerging storage technologies, we help maximize your storage investment return.
Bidirectional Power Flow
Transformers designed for PCS bidirectional operation, handling both charging and discharging cycles with equal efficiency. Optimized for 10,000+ cycle lifespan with minimal thermal degradation.
Containerized Solutions
Prefabricated containerized substations integrating transformer, switchgear, protection systems, and fire suppression in a single footprint. Fast deployment with plug-and-play connections.
Safety Systems
Comprehensive safety systems meeting NFPA 855 and UL 9540 standards, including arc-flash protection, gas detection, automatic fire suppression, and emergency ventilation.
High Efficiency
Premium grain-oriented silicon steel cores and optimized winding designs achieving 99%+ efficiency, minimizing energy losses in every charge-discharge cycle.
Battery Sizing Calculator
Size your battery energy storage capacity and configuration for the required autonomy, power and cycle life.
Industry Context & Operational Characteristics
Battery Energy Storage System (BESS) is the core supporting facility for new energy grid connection, grid peak regulation and power guarantee, covering centralized grid-side energy storage, user-side industrial and commercial energy storage, and micro-grid energy storage scenarios. Energy storage systems feature frequent charge-discharge switching, fast power response and bidirectional power flow, putting forward ultra-high requirements for equipment bidirectional operation capability, impact resistance and operational safety. Meanwhile, containerized energy storage stations have strict requirements for equipment compactness, fire safety and intelligent monitoring.
Key Operational Challenges
Power Distribution Architecture
Battery cluster → PCS converter → Energy storage transformer → EMS energy management system → Grid/Load terminal
Core Equipment Selection
BESS Dedicated PCS Transformers
Recommended Model: SCB dry-type bidirectional energy storage transformers, S20 oil-immersed energy storage special transformers
Core Configuration & Advantages
- Bidirectional power operation design, adapting to frequent charge-discharge switching of energy storage systems
- Enhanced over-current and impact resistance, coping with fast power regulation and cyclic load operation
- Low-harmonic winding design, reducing PCS converter harmonic interference and improving power quality
- High compactness design, perfectly matching containerized energy storage station layout
Applications: Containerized energy storage stations, industrial and commercial user-side energy storage, micro-grid energy storage systems.
Grid-Side Large-Capacity Energy Storage Transformers
Recommended Model: Large-capacity high-stability oil-immersed transformers
Core Configuration & Advantages
- Customized for centralized grid-side energy storage power stations
- Supports long-term high-power bidirectional operation
- Strong overload capacity and voltage stability
- Meets peak shaving, frequency regulation and grid stabilization requirements
Applications: Centralized grid-side energy storage power stations.
Switchgear & Substation Selection
PCS Converter Supporting Equipment
Matched power conversion systems realize efficient bidirectional conversion between AC and DC power of energy storage batteries, with fast response speed and stable conversion efficiency, supporting flexible power dispatch of energy storage systems.
EMS Intelligent Energy Management System
Realizes intelligent monitoring, automatic charge-discharge scheduling, peak-valley arbitrage control and grid-friendly operation of energy storage stations. It supports remote data viewing, fault early warning and operational data statistics.
BESS Safety & Monitoring System
Equipped with professional fire suppression system, temperature and humidity monitoring, smoke detection and leakage protection devices. It builds a full-dimensional safety protection system for energy storage stations to eliminate operational safety hazards.
Energy Storage Dedicated Switchgear
Bidirectional protection switchgears are adopted, with special protection logic for energy storage charge-discharge switching, realizing fast fault isolation and ensuring safe and stable system operation.
BESS Scenario Special Optimization
Bidirectional Operation Optimization
Optimized electromagnetic structure to adapt to frequent bidirectional charge-discharge cyclic operation
High Safety Upgrade
Full flame-retardant and explosion-proof design, matching energy storage station high fire safety standards
Compact Modular Design
Miniaturized and integrated structure adapting to containerized space constraints
Fast Response Adaptation
Low inertia and high sensitivity design to support millisecond-level power regulation
Full Intelligent Monitoring
Full-state operational monitoring linkage with EMS system for refined energy management
Power Quality Optimization
Energy storage PCS converter systems generate harmonic interference during bidirectional power conversion. Low-harmonic winding design and dedicated filtering equipment reduce PCS converter harmonic interference and improve overall power quality.
Key Benefits
Professional BESS Adaptability
Targeted design for bidirectional cyclic operation and fast regulation characteristics of energy storage
Multi-Scenario Compatibility
Covers grid-side, user-side and micro-grid energy storage full application scenarios
Ultra-High Operational Safety
Full-dimensional safety protection system eliminates energy storage operational risks
Intelligent Efficient Scheduling
EMS system maximizes energy storage economic benefits and grid stabilization value
Long Cycle Service Life
High fatigue resistance design adapts to long-term cyclic charge-discharge operation
Technical specifications
| Capacity Range | 500 kVA - 5,000 kVA |
| Voltage Range | Up to 35kV |
| Frequency | 50Hz / 60Hz |
| Insulation Class | H (180°C) |
| Efficiency | ≥99.0% at rated load |
| Cooling | AN/AF with forced-air option |
| Protection Rating | IP20D (indoor) / IP54 (outdoor) |
| Design Life | 25+ years / 10,000+ cycles |
Standards Compliance
Applications
Related Products
Explore QDTB® product lines available for this solution
Oil Immersed Transformers
S20 oil-immersed energy storage special transformers for utility-scale BESS
Dry Type Transformers
SCB dry-type bidirectional energy storage transformers for containerized stations
Box-Type Substations
Containerized BESS substations with integrated protection and fire suppression
Reactors
DC link reactors and harmonic filters for PCS converter systems
Why Choose QDTB® for Energy Storage Solutions
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