Selection: 1.9MWh battery capacity.
Rationale: The 1.9MWh capacity was chosen based on the store s daily electricity use and backup needs, covering off-peak demand and ensuring operation during outages for several hours to half a day.
Benefits: This capacity supports mall operations during non-peak hours and provides reliable backup in emergencies.
Advantage: The 1.9MWh capacity ensures critical operations continue without interruption during blackouts, maintaining essential services even in extended outages.
Selection: 500kW PCS (bi-directional converter) integrated cabinet, 2 units.
Rationale: The 500kW PCS integrated cabinet was chosen for its grid-connected off-grid switching capability, allowing it to respond to EMS commands, achieve seamless grid switching, and provide rapid charge discharge response in self-consumption mode.
Benefits: This configuration supports efficient grid switching, rapid charge discharge response, and includes features like island protection and high low voltage ride-through, ensuring stable system operation.
Advantage: The 500kW PCS ensures reliable power support across various operating modes, enhancing system flexibility and resilience.
Selection: 500kW photovoltaic inverter, maximum configuration.
Rationale: The 500kW photovoltaic inverter was selected based on the mall s location s sunlight intensity and available rooftop area, with an expected daily generation of 2MWh under an 80% sunlight efficiency and 5 hours of sunlight per day.
Benefits: This configuration efficiently utilizes solar resources, reduces grid dependency, and charges the battery during the day for nighttime use.
Advantage: The 500kW photovoltaic power effectively harnesses solar energy, ensuring a reliable and sustainable power supply while minimizing grid reliance.
Battery Storage System | |||||||
Cell Type | System Battery Configuration | Rated Battery Capacity(kWh) | Battery Voltage Range(V) | BMS Communication Interface | BMS Communication Protocol | ||
3.2V/314Ah |
240S1P*8 | 241.2*8 | 600~876 | RS485,Ethernet | Modbus TCP | ||
AC Output | |||||||
Rated Power(MWh) | Current Distortion Rate | DC Component | Grid Voltage(V) | Power Factor | Power factor Adjustable Range | Rated Frid Frequency(Hz) | Grid Frequency Range(Hz) |
1 | < 3 % (at rated power) | < 0.5 % (at rated power) | 400 | > 0.99 (at rated power) | 1 (overrun) to 1 (lag) | 60 | 55~65 |
MPPT | |||||||
Rated Power(kW) | Full load MPPT range(V) | Operating Voltage Range(V) | Starting Voltage(V) | Rated Input Voltage(V) | Max. short-circuit Current of Single MPPT(A) | Output Voltage Range(V) | Power Factor |
100*5 units | 180~1000 | 200~1000 | 200 | 600 | 52.2 | 400 | 0.8 ahead ~ 0.8 lagging |
The system enables seamless integration with photovoltaic panels and diesel generators, supporting versatile energy switching for enhanced stability and reliability in power supply.
A high-efficiency cooling system with optimized airflow maintains safe battery temperatures in extreme heat, while smoke detectors and heptafluoropropane fire suppression ensure comprehensive safety.
The advanced Battery Management System (BMS) monitors voltage, current, and temperature to ensure optimal performance and longevity. Predictive algorithms provide early warnings of battery aging for proactive maintenance.
The 500kW photovoltaic system paired with 1.9MWh storage is designed based on the store s actual energy needs and local sunlight conditions, avoiding unnecessary costs from overconfiguration.
The 1MW PCS, photovoltaic inverter, and STS module provide versatile functions such as charging, discharging, and grid interaction. This setup mitigates the impact of diesel generator integration and improves power quality, ensuring high system reliability and rapid emergency response.
The combination of photovoltaic and energy storage reduces operational costs and carbon footprint, aligning with green energy trends.