■ ESS(energy storage system)
An energy storage system (ESS) is a storage device that stores power like a very large water tank and can be used when power is temporarily short or when needed.
ESS Configuration
System Configuration (High-Pressure Connection)
- PMS Monitors the entire ESS and controls the plant
- PCS Transforms electrical properties (AC ↔ DC, or changes the voltage or frequency) to charge/discharge the power produced to the battery
- Battery Store (recharges) power received from PCS, then output (discharge) power to system at the requried time.
- BMS Monitors and controls the battery
■ ESS Container Configuration
ESS with Container
Container : Intergral / Segment Type – Design and construction according to site conditions
No electrical room required
Enhanced system durability
| PCS Capacity |
100kW |
250kW |
500kW |
1,000kW |
2,000kW |
2,500kW |
| PCS Type |
Transformer |
Transformerless |
| Battery (default specification) |
274kWh |
766kWh |
1,497kWh |
2,994kWh |
5,988kWh |
7,485kWh |
| Battery and PCS Enclosure |
Container (Intergral / Segment Type) |
| Air conditioning equipment |
System cooling/heating, automatic switching system for cooling/heating by weather, remote temperature control function, schedule management |
| Firefighting equipment |
Automatically detects fires and sprays eco-friendly fire extinguishing agents |
| Switchboard |
Hybrid distributed power supply, protection relay, distribution transformer, and power exchange meter included (100 kW switchboard for ESS is optional) |
| PMS |
Local control and remote control |
| Web monitoring |
Option |
| O&M |
Separate contract |
| Installation environment |
Installation location |
Indoors (IP20) |
| Ambient temperature |
-20℃ ~ 50℃ |
| Storage temperature |
-20℃ ~ 50℃ |
| Relative humidity |
less than 95% |
| Altitude |
less than 1,000m |
| Battery |
Maximum input voltage |
950Vdc |
1,100Vdc |
1,100Vdc |
1,100Vdc |
1,150Vdc |
1,150Vdc |
| Voltage range |
550 ~ 850Vdc |
750 ~ 1,000Vdc |
750 ~ 1,000Vdc |
750 ~ 1,000Vdc |
750 ~ 1,100Vdc |
750 ~ 1,100Vdc |
| Maximum input current |
200Adc |
367Adc |
734Adc |
1,470Adc |
2,800Adc |
3,500Adc |
| Output |
Relay connection method |
3-phase 4-wire system |
3-phase 3-wire system |
3-phase 3-wire system |
3-phase 3-wire system |
3-phase 3-wire system |
3-phase 3-wire system |
| Insulation |
Transformer |
Transformerless |
Transformerless |
Transformerless |
Transformerless |
Transformerless |
| Rated Power |
100kW |
250kW |
500kW |
1,000kW |
2,000kW |
2,500kW |
| Rated Voltage |
380V (-10%, +10%) |
440V (-10%, +10%) |
440V (-10%, +10%) |
440V (-10%, +10%) |
440V (-10%, +10%) |
440V (-10%, +10%) |
| Rated Output Current |
152A |
328A |
656A |
1,312A |
2,624A |
3,280A |
| Operating Frequency |
50Hz / 60Hz (-1%, +1%) |
| Current harmonics content |
Total : <5% / Individual : <3% |
| Power factor |
More than 0.99 |
| Efficiency |
Charging efficiency |
>96.36% |
>98.02% |
>98.15% |
>97.99% |
>98.00% |
>98.31% |
| Discharging efficiency |
>96.84% |
>98.55% |
>98.30% |
>98.23% |
>98.20% |
>98.20% |
| Structure |
Appearance |
800 x 750 x 1,655 |
750 x 700 x 2,009 |
1,300 x 790 x 2,152 |
2,060 x 790 x 2,152 |
3,600 x 800 x 2,050 |
3,900 x 900 x 2,050 |
| Weight |
820kg |
650kg |
1,000kg |
2,000kg |
3,280kg |
3,800kg |
| Cooling method |
Forced air cooling |
| IP |
21 |
| Noise level |
<78dB |
-
TURN-KEY system provided
- Provide plug-in solar ESS by capacity
-
Maximize Yield
- Achieve maximum system output efficiency through system analysis
-
Troubleshooting
- System design and feasibility review through solar power generation data analysis
- Standard system design by specialized capacity
-
BATTERY
- Secured price competitiveness through long term contracts with major Korean battery manufacturers
- Manufacturer's battery life/performance guarantee (quality guarantee issued)
-
All Products (PCS, PMS)
- As a development/manufacturing company specializing in all PCS and PMS products, WonKwang S&T has secured superiority in solar power generation, ESS product performance and quality, and price competitiveness.
-
Maintenance
- An A/S network has been established nationwide, and call centers are being operated. (A/S centers in Ulsan, Gwangju, Daegu, and Cheonan are in operation.)
- Possible to respond within 24 hours nationwide after receiving a notice of failure
- Failure prevention maintenance through ongoing inspections
