5MVA MV Skid Integrated Power Conversion System for Energy Storage
The Liyond 5MVA MV skid compact is a pre-assembled, highly integrated solution engineered for high-performance grid interconnection, serving as the ideal bridge for large-scale battery energy storage systems (BESS).
Housed within a standard 20-foot high cube container footprint, the system integrates a 5000kVA transformer, RMU switchgear, 2 PCS units, and advanced protection devices. Featuring IEC 61850 protocol compliance and seamless EMS integration, it ensures efficient grid interaction.
Specific configurations can be tailored to your project.
5MVA MV Skid Features
Empowers the grid with robust peak shaving, frequency regulation, and black start capabilities.
Features IEC61850 protocol compliance and standardized modeling, enabling plug-and-play integration with site-level EMS.
Features an all-in-one modular design highly integrating protection, measurement, and control, factory-preassembled to minimize on-site installation time and labor costs.
Adopts advanced ANPC three-level topology delivering over 99% peak conversion efficiency, supporting PQ, VF, and VSG modes alongside robust high/low-voltage ride-through and grid adaptability.
5MVA MV Skid Specifications
Transformer
| Rated power | 5000 kVA |
| Type | Oil immersed transformer |
| Connection group | Dy11 |
| IP Rating / Degree of Protection | IP54 |
| Cooling method | ONAN |
| Temperature rise limit | 60K (Top oil temperature) 65K (winding) @40°C (customizable) |
| Transformer oil | Mineral oil |
| Medium Voltage (MV) Operating Range | 6.6 ~ 33 kV ±5% |
| Rated frequency | 50 / 60 Hz |
| Converter Efficiency | T2 |
| Winding material | Aluminium / Copper |
| Altitude | ≤1000m (Customization is available for sizes greater than 1000m) |
Switching equipment
| Type | RMU, CCV |
| Operating current | 630 A |
| Working Voltage | 12 / 24 / 36 kV |
| Enclosure IP Rating | IP4X |
| Rated short-circuit current | 20 kA/3s |
| Overcurrent protection current | A FL 20kA 1s |
PCS*2
| DC input voltage range | 1050 ~ 1500 V |
| Maximum DC input current | 2620 A |
| DC voltage ripple | < 2% |
| DC current ripple | < 3% |
| Low voltage rated working voltage | 690 V |
| Low voltage operating voltage range | 621 ~ 759 V |
| Energy efficiency | ≥ 99% |
| Maximum AC output current | 2302 A |
| Total harmonic distortion rate | < 3% |
| Reactive power compensation | Four quadrant operation |
| Rated output power | 2500 kVA |
| Maximum AC power | 2750 kVA |
| Power factor range | > 0.99 |
| Rated frequency | 50 / 60 Hz |
| Working frequency range | 45~55 / 55~65 Hz |
| Wiring method | Three-phase three wire system |
Protective device
| DC input protection | Inverter with built-in isolation switch and fuse |
| Communication output protection | Inverter with built-in electric circuit breaker |
| DC overvoltage protection | Class II surge protector |
| Communication overvoltage protection | Class II surge protector |
| Ground fault protection | DC side insulation monitoring |
| Transformer protection | Pressure, temperature, gas, and oil level reduction protection (with PT100 sensor) |
Communication interface
| Communication Medium/Interface | CAN / RS485 / RJ45 / Optical fiber |
| Communication protocol | CAN / Modbus / IEC60870-104 / IEC61850 |
| Number of Converters/Inverters | Standard configuration: 1 unit |
| UPS | 1kVA (15min / 1h / 2h) |
General Part
| Size | W 6058 × H 2896 × D 2438 mm (20ft High Cube Container) |
| Weight | 24 t |
| Degree of protection (IP) | IP54 |
| Operating Temperature | -35 ~ 60°C (>45°C Derating) |
| Storage temperature | -35 ~ 70°C |
| Maximum altitude | 5000m (≥3000m Derating) |
| Ambient humidity | 0 ~ 100%, No condensation |
| Auxiliary power consumption | 12kVA Peak |
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