PRODUCT
220kV Energy Storage Transformer
220kV Energy Storage Transformer Full Technical Parameters (English Version)
1. Basic Parameters
– Type: Three-phase oil-immersed 220kV energy storage special transformer – Rated Frequency: 50 Hz
– Rated Voltage:
HV: 220kV ±8×1.25% LV: 10.5kV / 35kV / 38.5kV (customizable)
– Rated Capacity: 31.5MVA ~ 360MVA
Standard: 63MVA, 90MVA, 120MVA, 180MVA, 240MVA, 360MVA
– Phase: 3-phase
– No-load Voltage Regulation: Off-circuit tap changer – On-load Voltage Regulation: OLTC (optional)
2. Connection & Impedance
– Connection Group: YNd11 / YNyn0d11 (customizable) – Impedance Voltage: 12% ~ 18% (based on capacity)
3. Cooling System
– ONAN / ONAF / OFAF / OFWF
4. Insulation Level
– HV: LI 950kV / AC 460kV – LV: LI 200kV / AC 95kV
5. Losses (High Efficiency Level)
– No-load Loss: Meets GB1094 and IEC 60076 high efficiency level – Load Loss: Low loss design for energy storage system
6. Performance for Energy Storage
– Strong ability to withstand frequent charge-discharge impact – High overload capacity: 120%~150% rated load
– Low noise: ≤ 65~75 dB
– High short-circuit withstand strength – Low partial discharge: ≤ 100 pC
7. Operating Conditions
– Altitude: ≤ 1000m (customizable for high altitude) – Ambient Temperature: -30°C ~ +40°C
– Suitable for frequent load fluctuation – Suitable for long-term continuous operation
8. Protection & Monitoring
– Winding temperature online monitoring – Oil temperature monitoring
– Oil level indicator – Pressure relief device
– Gas relay (Buchholz relay) – DGA online monitoring (optional)
– Partial discharge monitoring (optional)
9. Standards Compliance
– IEC 60076
– GB 1094
– GB/T 6451
– GB/T 10227
220kV Energy Storage Transformer Scope of Application (Detailed Version)
This 220kV three-phase oil-immersed energy storage transformer is a special high-voltage transformer designed for large-scale new energy storage systems, grid integration, and flexible power grid applications. It is mainly used to connect battery energy storage systems (BESS), wind farms, photovoltaic power stations, and other new energy sources to the 220kV high-voltage power grid, achieving voltage conversion, power transmission, grid connection, peak regulation, frequency regulation, and safe and stable operation of the entire energy storage system.
1. Large‑Scale Grid‑Side Energy Storage Power Stations
Widely used in 100MW/200MWh, 200MW/400MWh, and larger grid‑independent energy storage power stations. It provides stable voltage transformation and grid connection for peak shaving, valley filling, frequency regulation, voltage support, rotating reserve, and emergency power support of the power grid. It can adapt to frequent charging and discharging of energy storage systems and rapid power fluctuation characteristics, with high reliability, high overload capacity, and strong impact resistance.
2. Wind Power & Photovoltaic (PV) Integration with Energy Storage
Applied in large‑scale wind power bases, photovoltaic bases, and renewable energy integration projects equipped with energy storage systems. It helps smooth intermittent and fluctuating power output from wind and solar energy, improves power quality, meets strict grid‑connection standards, and enhances the consumption capacity of new energy. It is key equipment for the stable grid connection of large new energy bases.
3. Shared Energy Storage and Independent Energy Storage Projects
Suitable for shared energy storage stations, industrial park‑level large energy storage, and multi‑user energy storage projects. It supports peak‑valley electricity price arbitrage, demand side response, backup power supply, and capacity optimization, helping users reduce electricity costs and improve energy efficiency.
4. UHV Transmission & Regional Power Grid Support
Used in supporting systems for UHV AC/DC transmission projects and regional power grids. It improves grid flexibility, suppresses power oscillation, enhances system stability, and provides fast power support during grid faults or peak load periods.
5. New-Type Power System Construction
As core equipment for building a new-type power system with new energy as the main body, it supports large‑scale development of wind power, photovoltaic, and energy storage. It promotes green, low-carbon, safe, and efficient operation of the power system, and is widely used in national energy hubs, new energy demonstration zones, and modern power grid construction.
6. Industrial & Urban Integrated Energy Systems
Applied in high‑energy‑consuming enterprises, industrial zones, data centers, and urban integrated energy projects with large‑capacity energy storage demand. It realizes coordinated operation of cooling, heating, power, and energy storage, improves power supply reliability, and reduces operational power consumption costs.
This series of transformers features high efficiency, low loss, strong short‑circuit withstand strength, high reliability, and intelligent online monitoring, fully meeting the long‑term, safe, and stable operation requirements of large‑scale energy storage systems
