MVGS Series: Direct-to-MV grid simulation for megawatt-scale testing
A high-performance four-quadrant programmable AC source for testing and certifying energy storage PCS, solid-state transformers, renewable-energy inverters and other high-power grid-connected equipment. Every MVGS system is engineered around the customer’s DUT, grid connection, voltage, power, dynamics, cooling, safety concept and required test functions.
Utility grid, MVGS and equipment under test
Direct medium-voltage output for realistic and highly dynamic grid simulation
The MVGS Series uses a modular Power Cell Cascaded topology to generate medium voltage directly at the output. This supports fast dynamic behavior, high waveform quality and flexible project-specific voltage and power configurations for large laboratories and certification facilities.
Grid simulator and regenerative load in one system
In source operation, the MVGS recreates normal, disturbed and faulted grid conditions. With the regenerative load option, it can absorb AC power from the equipment under test and feed the energy back into the utility grid, reducing heat dissipation and the operating cost of long-duration high-power tests.
Not a fixed off-the-shelf configuration
Input and output voltage, power, current, overload capability, bandwidth, cooling, cabinet layout, safety functions and software options are selected around the intended DUT and the available laboratory infrastructure. Parallel master-slave systems allow expansion to 20 MVA and beyond.
One MVGS platform, engineered around your exact test requirement
The MVGS Series is highly configurable rather than limited to one standard specification. Tell us what the DUT and test laboratory require. ET System reviews the technical feasibility and develops a suitable system concept, including the required functions and only the options that are relevant to your project.
Grid-code, power-quality and high-power validation at medium voltage
The system is suited to development, validation, type testing, certification and endurance testing of megawatt-scale power electronics and grid-connected equipment.
Energy Storage PCS
LVRT, HVRT, ZVRT, active/reactive power support, frequency response and regenerative full-power testing of megawatt-scale storage converters.
Solid-State Transformers
Bidirectional power-transfer testing, fixed phase-difference operation, overload testing and validation of SST systems for AI data centers and future distribution grids.
Renewable-Energy Inverters
Simulation of voltage and frequency deviations, harmonic environments and dynamic solar or wind power profiles for grid-connected inverter verification.
Microgrids and Distribution Research
PQ control, unbalance, grounding faults, phase displacement and flexible power exchange between different grid sectors, SOPs and laboratory grids.
Grid Certification Laboratories
Reproducible fault-ride-through and immunity tests according to relevant international and regional requirements for grid-connected equipment.
Regenerative High-Power Load Testing
CR, CC, CP and non-linear rectifier-load simulation with controlled leading or lagging current and energy recovery to the supply grid.
Hardware-in-the-Loop at Medium Voltage
Dynamic HIL testing directly at medium voltage without an external step-up transformer, enabling realistic closed-loop validation of control systems and high-power equipment.
Reproduce complex grid faults, power-quality events and bidirectional power flow
LVRT, HVRT and ZVRT with fast programmable transitions
Built-in and freely programmable sequences allow the recreation of low-voltage, high-voltage and zero-voltage ride-through events. The HV option raises the maximum output voltage to 1.3 times the rated voltage for continuous overvoltage testing, while the rapid voltage response supports realistic transient fault reproduction.
Harmonics, inter-harmonics, unbalance, flicker and phase control
The MVGS can generate harmonics up to the 50th order and superimpose non-integer inter-harmonics. Users can configure amplitude and phase angle of individual components, program all three phases independently and reproduce unbalanced or degraded grid conditions for immunity and compliance testing.
Project-specific medium-voltage input, output and power configuration
The cabinet-based system is configured around the required grid connection, rated output, test current, overload profile, dynamic bandwidth and cooling concept. Modular power cells and master-slave operation enable solutions from 1 MVA to 10 MVA per system concept and expansion to 20 MVA and above.
High-voltage, high-power and high-dynamic performance
Final values are configured for the project. The following figures summarize the general MVGS Series range and core performance characteristics.
From 13.8 kV ESS testing to high-bandwidth 20 kV systems
The MVGS is not limited to fixed catalogue models. These examples illustrate how voltage, current, overload capability and bandwidth can be adapted to a defined test requirement.
| Configuration example | Continuous power | Output voltage | Rated current | Dynamic / special capability |
|---|---|---|---|---|
| 5 MVA / 13.8 kV ESS grid simulator | 5 MVA | 0-13.8 kV L-L; up to 17.94 kV with HV option | 210 A per phase | 30-70 Hz, < 1 ms voltage transition, LVRT/HVRT/ZVRT |
| 5 MVA / 20 kV high-bandwidth unit | 5 MVA | 0-20 kV L-L; up to 26 kV with HV option | 144 A per phase | 10 MVA and 288 A/ph for 2 s; 30-100 Hz; 10 kHz small-signal bandwidth |
| Parallel 10 MVA laboratory system | 10 MVA | Project-specific, for example 20 kV L-L | Combined through master-slave parallel operation | Example peak capability up to 20 MW for 1-2 s, subject to final project design |
The configurations shown above are project examples. Final voltage, current, overload duration, bandwidth, cabinet layout, cooling and safety design are defined during project engineering.
Configure the MVGS around the required grid test
Extended HVRT voltage
Increases the maximum output voltage to 1.3 times the rated value for continuous high-voltage ride-through and overvoltage testing.
Regenerative AC load mode
Adds CR, CC, CP and non-linear rectifier-load simulation with energy recovery to the grid. The phase angle can be programmed from +90° to -90° for leading or lagging loads, while the rectifier mode supports a configurable waveform factor from 0 to 2.121.
Active and reactive power control
Independent control of P and Q for DER profiles, microgrid research, SST/SOP validation and four-quadrant power-dispatch testing.
Fixed phase-difference mode
Tracks the input-grid phase while maintaining a constant programmed angle difference for stable power-transfer simulations. Project-specific configurations can remain operational during a single-phase metallic grounding fault at the input or output grid terminals.
Liquid cooling
Alternative cooling concept for projects with specific installation, acoustic, thermal or power-density requirements.
Industrial touch control
Windows-based GUI on a 15.6-inch industrial touch panel with sequence programming, real-time monitoring, waveform capture at up to 10 kS/s, historical data logging, fault diagnostics and LAN/RS485 control.
Protection, diagnostics and safety for medium-voltage test environments
The system architecture combines electrical protection, optical-fiber communication and local as well as remote safety functions. Final safety integration is adapted to the laboratory, DUT and applicable site rules. Dedicated connection cabinets can be provided for the AC input and AC output interfaces.
Harmonized safety framework for international projects
The final compliance package is defined for the selected configuration and installation. The engineering approach combines relevant Chinese GB/T requirements with international IEC/EN standards for CE conformity.
| System module | Chinese standard (GB/T) | International standard (IEC/EN) | Compliance purpose |
|---|---|---|---|
| System safety | GB/T 3859 / GB 19517 | IEC 62477-1 | Core safety for power-electronic converter systems, including thermal and hardware protection. |
| MV interface | GB/T 311.1 / GB/T 16927 | IEC 62271-1 | Insulation coordination and dielectric strength for medium-voltage applications. |
| Control and HMI | GB/T 3797 / GB 13869 | EN 61010-1 | Operator protection and reinforced galvanic isolation for touchscreen and control circuits. |
| Cabinet wiring | GB/T 15139 | EN 60204-1 | General electrical safety, internal routing and emergency-stop logic. |
A structured route to the suitable MV grid simulator
Tell us what your test system must achieve
The MVGS Series can be adapted extensively to the DUT and laboratory. Send us the key requirements and ET System will review the technical feasibility, clarify open points and develop a project-specific system configuration with the functions, interfaces and safety concept your application actually needs.
MVGS Series: Direct-to-MV grid simulation for megawatt-scale testing
A high-performance four-quadrant programmable AC source for testing and certifying energy storage PCS, solid-state transformers, renewable-energy inverters and other high-power grid-connected equipment. Every MVGS system is engineered around the customer’s DUT, grid connection, voltage, power, dynamics, cooling, safety concept and required test functions.
Utility grid, MVGS and equipment under test
Direct medium-voltage output for realistic and highly dynamic grid simulation
The MVGS Series uses a modular Power Cell Cascaded topology to generate medium voltage directly at the output. This supports fast dynamic behavior, high waveform quality and flexible project-specific voltage and power configurations for large laboratories and certification facilities.
Grid simulator and regenerative load in one system
In source operation, the MVGS recreates normal, disturbed and faulted grid conditions. With the regenerative load option, it can absorb AC power from the equipment under test and feed the energy back into the utility grid, reducing heat dissipation and the operating cost of long-duration high-power tests.
Not a fixed off-the-shelf configuration
Input and output voltage, power, current, overload capability, bandwidth, cooling, cabinet layout, safety functions and software options are selected around the intended DUT and the available laboratory infrastructure. Parallel master-slave systems allow expansion to 20 MVA and beyond.
One MVGS platform, engineered around your exact test requirement
The MVGS Series is highly configurable rather than limited to one standard specification. Tell us what the DUT and test laboratory require. ET System reviews the technical feasibility and develops a suitable system concept, including the required functions and only the options that are relevant to your project.
Grid-code, power-quality and high-power validation at medium voltage
The system is suited to development, validation, type testing, certification and endurance testing of megawatt-scale power electronics and grid-connected equipment.
Energy Storage PCS
LVRT, HVRT, ZVRT, active/reactive power support, frequency response and regenerative full-power testing of megawatt-scale storage converters.
Solid-State Transformers
Bidirectional power-transfer testing, fixed phase-difference operation, overload testing and validation of SST systems for AI data centers and future distribution grids.
Renewable-Energy Inverters
Simulation of voltage and frequency deviations, harmonic environments and dynamic solar or wind power profiles for grid-connected inverter verification.
Microgrids and Distribution Research
PQ control, unbalance, grounding faults, phase displacement and flexible power exchange between different grid sectors, SOPs and laboratory grids.
Grid Certification Laboratories
Reproducible fault-ride-through and immunity tests according to relevant international and regional requirements for grid-connected equipment.
Regenerative High-Power Load Testing
CR, CC, CP and non-linear rectifier-load simulation with controlled leading or lagging current and energy recovery to the supply grid.
Hardware-in-the-Loop at Medium Voltage
Dynamic HIL testing directly at medium voltage without an external step-up transformer, enabling realistic closed-loop validation of control systems and high-power equipment.
Reproduce complex grid faults, power-quality events and bidirectional power flow
LVRT, HVRT and ZVRT with fast programmable transitions
Built-in and freely programmable sequences allow the recreation of low-voltage, high-voltage and zero-voltage ride-through events. The HV option raises the maximum output voltage to 1.3 times the rated voltage for continuous overvoltage testing, while the rapid voltage response supports realistic transient fault reproduction.
Harmonics, inter-harmonics, unbalance, flicker and phase control
The MVGS can generate harmonics up to the 50th order and superimpose non-integer inter-harmonics. Users can configure amplitude and phase angle of individual components, program all three phases independently and reproduce unbalanced or degraded grid conditions for immunity and compliance testing.
Project-specific medium-voltage input, output and power configuration
The cabinet-based system is configured around the required grid connection, rated output, test current, overload profile, dynamic bandwidth and cooling concept. Modular power cells and master-slave operation enable solutions from 1 MVA to 10 MVA per system concept and expansion to 20 MVA and above.
High-voltage, high-power and high-dynamic performance
Final values are configured for the project. The following figures summarize the general MVGS Series range and core performance characteristics.
From 13.8 kV ESS testing to high-bandwidth 20 kV systems
The MVGS is not limited to fixed catalogue models. These examples illustrate how voltage, current, overload capability and bandwidth can be adapted to a defined test requirement.
| Configuration example | Continuous power | Output voltage | Rated current | Dynamic / special capability |
|---|---|---|---|---|
| 5 MVA / 13.8 kV ESS grid simulator | 5 MVA | 0-13.8 kV L-L; up to 17.94 kV with HV option | 210 A per phase | 30-70 Hz, < 1 ms voltage transition, LVRT/HVRT/ZVRT |
| 5 MVA / 20 kV high-bandwidth unit | 5 MVA | 0-20 kV L-L; up to 26 kV with HV option | 144 A per phase | 10 MVA and 288 A/ph for 2 s; 30-100 Hz; 10 kHz small-signal bandwidth |
| Parallel 10 MVA laboratory system | 10 MVA | Project-specific, for example 20 kV L-L | Combined through master-slave parallel operation | Example peak capability up to 20 MW for 1-2 s, subject to final project design |
The configurations shown above are project examples. Final voltage, current, overload duration, bandwidth, cabinet layout, cooling and safety design are defined during project engineering.
Configure the MVGS around the required grid test
Extended HVRT voltage
Increases the maximum output voltage to 1.3 times the rated value for continuous high-voltage ride-through and overvoltage testing.
Regenerative AC load mode
Adds CR, CC, CP and non-linear rectifier-load simulation with energy recovery to the grid. The phase angle can be programmed from +90° to -90° for leading or lagging loads, while the rectifier mode supports a configurable waveform factor from 0 to 2.121.
Active and reactive power control
Independent control of P and Q for DER profiles, microgrid research, SST/SOP validation and four-quadrant power-dispatch testing.
Fixed phase-difference mode
Tracks the input-grid phase while maintaining a constant programmed angle difference for stable power-transfer simulations. Project-specific configurations can remain operational during a single-phase metallic grounding fault at the input or output grid terminals.
Liquid cooling
Alternative cooling concept for projects with specific installation, acoustic, thermal or power-density requirements.
Industrial touch control
Windows-based GUI on a 15.6-inch industrial touch panel with sequence programming, real-time monitoring, waveform capture at up to 10 kS/s, historical data logging, fault diagnostics and LAN/RS485 control.
Protection, diagnostics and safety for medium-voltage test environments
The system architecture combines electrical protection, optical-fiber communication and local as well as remote safety functions. Final safety integration is adapted to the laboratory, DUT and applicable site rules. Dedicated connection cabinets can be provided for the AC input and AC output interfaces.
Harmonized safety framework for international projects
The final compliance package is defined for the selected configuration and installation. The engineering approach combines relevant Chinese GB/T requirements with international IEC/EN standards for CE conformity.
| System module | Chinese standard (GB/T) | International standard (IEC/EN) | Compliance purpose |
|---|---|---|---|
| System safety | GB/T 3859 / GB 19517 | IEC 62477-1 | Core safety for power-electronic converter systems, including thermal and hardware protection. |
| MV interface | GB/T 311.1 / GB/T 16927 | IEC 62271-1 | Insulation coordination and dielectric strength for medium-voltage applications. |
| Control and HMI | GB/T 3797 / GB 13869 | EN 61010-1 | Operator protection and reinforced galvanic isolation for touchscreen and control circuits. |
| Cabinet wiring | GB/T 15139 | EN 60204-1 | General electrical safety, internal routing and emergency-stop logic. |
A structured route to the suitable MV grid simulator
Tell us what your test system must achieve
The MVGS Series can be adapted extensively to the DUT and laboratory. Send us the key requirements and ET System will review the technical feasibility, clarify open points and develop a project-specific system configuration with the functions, interfaces and safety concept your application actually needs.