MVDC MMC Convertor - GridMax MV
Introduction
GridMax MV is an advanced, solid-state AC to DC converter that connects directly to a medium-voltage grid (11 kV AC) and delivers a regulated 15 kV DC output. Using Modular Multilevel Converter (MMC) architecture a breakthrough power electronics topology adopted globally for HVDC and FACTS systems the converter enables highly efficient, modular, and scalable transformation of utility-scale AC to high-voltage DC.
Designed for megawatt-scale EV charging, green ports, hydrogen electrolyzer feeds, and high-power industrial infrastructure, GridMax MV eliminates the need for bulky step-down transformers and secondary rectification stages.
MMC technology :
- High Efficiency: >98% conversion across a wide load range
- Low Harmonics: Built-in harmonic mitigation—no need for bulky filters
- Scalability: Module-based expansion from 1 MW to 10 MW
- Fault Tolerance: Redundant submodules enhance uptime
- Bidirectional Operation: Supports vehicle-to-grid (V2G), BESS cycling, and load leveling
- Fast Dynamics: Sub-10 ms response to grid fluctuations and DC load surges
| Parameter | Value | ||||||
| Grid Input | 11 kV AC, 3-phase, 50/60 Hz | ||||||
| DC Output Voltage | 15,000 VDC (configurable 12–20 kV) | ||||||
| Power Capacity | Modular blocks: 1 MW to 10 MW | ||||||
| Topology | Modular Multilevel Converter | ||||||
| Cooling | Air / Liquid cooling | ||||||
| Switching Devices | SiC-based high-speed switches | ||||||
| Isolation | Internal medium-voltage isolation transformers (optional external bypass) | ||||||
| Protection | Internal arc fault, surge, overload, earth fault | ||||||
| Communication | IEC 61850, Modbus TCP/IP, OPC UA |
- Direct Grid Interface: No need for 33/11 kV transformer
- Containerized Design: Available in 20ft/40ft ISO containers for plug-and-play deployment
- Digital Control: FPGA/ARM-based control platform with predictive diagnostics
- Smart Synchronization: Supports grid-forming and grid-following modes
- Integrated Safety: Arc flash detection, auto isolation, and remote shutdown
- EV Chargers: Connects directly to multi-output DC dispensers for marine, truck, and bus chargers
- BESS: Interfaces with Li-ion, LTO, or LFP battery banks at high voltage
- Hydrogen Systems: Feeds electrolyzers requiring stable 10–20 kV DC input
- Substation Digitalization: Acts as solid-state transformer for next-gen MV substations
- Electric Tugboat and Vessel Megawatt Charging
Enables rapid port-side charging at 1 MW – 10 MW per berth . - Electric Bus Depot Infrastructure
Acts as a medium-voltage DC backbone for depots needing 1–10 MW peak delivery. - Hydrogen Production
Seamlessly powers large-scale PEM electrolyzers with accurate DC output control. - Virtual Power Plants & V2G
GridMax enables dynamic interaction between EV fleets and the utility grid for energy balancing.
The GridMax MV leverages best-in-class practices in MVDC:
- Incorporates SiC-based switching for higher efficiency than legacy IGBT-only designs
- Control algorithms follow IEC 61850 substation standards with real-time power flow monitoring
- 100% Solid-State – No Transformers, No Rectifiers
- Lower Installation & Maintenance Costs
- Built in India – Compliant with MAKE IN INDIA & Green Port Initiatives
- Ready for CPRI/Type Testing and Export Certification