1. Technical characteristics of energy storage transformers
The bidirectional power tolerance design supports continuous operation of energy storage charging and discharging in both directions. The winding structure is adapted to bidirectional alternating current and can withstand the impact load caused by frequent power switching, meeting the requirements of multiple charging and discharging cycles of energy storage in a day.
The low harmonic additional loss structure PCS inverter generates a large amount of high-frequency harmonics. It adopts a design that reduces eddy current losses, a low loss high conductivity magnetic core, and a winding shielding structure to suppress harmonic heating and reduce long-term operating temperature rise and energy consumption.
Strong dynamic and thermal stability, resistant to short-circuit impact. The energy storage system has a large short-circuit current impact, and the winding casting/oil tank structure is reinforced and fastened. The dynamic and thermal stability margin is much higher than that of ordinary distribution transformers, and it can withstand high current faults on the energy storage side without damage.
Safe and explosion-proof, suitable for container enclosed compartments, dry energy storage, oil-free and fire-resistant, suitable for narrow and enclosed spaces in containers; Oil immersed models are equipped with oil collection tanks and fire extinguishing devices, and the whole machine integrates temperature and smoke sensing fire linkage.
Integrated and complete transformer matching independent temperature control system, linked with container ventilation, air conditioning, and fire protection, can be connected to energy storage power station EMS energy management platform, remote telemetry of temperature, load, and fault signals.
All weather container protection The whole container is made of anti-corrosion steel plate, which is heat insulated, rain proof, dust-proof and heat insulated, and is suitable for long-term outdoor layout in mountainous areas, mudflat and the plant area
2. Product features
2.1 Design standards: GB, IEC
2.2 Capacity (MVA): 1-10
2.3 Voltage (KV): 10-35
2.4 Cooling method:
·Built in dry energy storage transformer: AN natural air cooling/AF forced air cooling;
·Built in oil immersed energy storage transformer: ONAN oil immersed natural air cooling/ONAF forced air cooling;
2.5 Installation location: Outdoor site of energy storage power station, open space of industrial park, photovoltaic/wind power supporting energy storage field area, mountain shared energy storage base, outdoor of industrial and commercial plant area, with concrete foundation installed on the ground.
2.6 Application Scenarios: Large scale shared energy storage power stations on the grid side, integrated wind solar energy storage power stations, peak valley arbitrage energy storage for industrial and commercial users, integrated charging stations for light storage and charging, frequency regulation energy storage for thermal power plants, and distributed household energy storage and boosting systems.
2.7 Insulation level
Epoxy cast dry-type energy storage transformer: F-class insulation, temperature rise limit of 100K; H-class optional for high-temperature sealed containers;
Oil immersed energy storage transformer: A-grade oil paper insulation;
2.8 Operating environment
Environmental temperature: -35 ℃~+40 ℃;
Altitude: ≤ 1000m, customized for high-altitude power stations to strengthen insulation and increase heat dissipation;
Atmospheric conditions: Outdoor rain and sun protection, coastal areas can be customized with anti-corrosion stainless steel containers; No strong corrosion, high concentration conductive dust; Relative humidity ≤ 95% without condensation;
Supporting conditions: The foundation is flat and the drainage is smooth. The container is equipped with fire protection, temperature control, and dehumidification systems.
2.9 Types
According to the type of built-in transformer: dry-type energy storage and boosting integrated machine, oil immersed energy storage and boosting integrated machine;
Grid connected voltage level: 10kV energy storage integrated machine, 35kV energy storage integrated machine;
According to power topology: single winding standard type, 12 pulse double split type;
By usage scenario: large capacity energy storage integrated machine on the grid side, small household storage integrated machine for industrial and commercial use, and dedicated integrated machine for wind solar energy storage;
