Kewell G9000 | Bidirectional AC/DC Power Supply and Electronic AC Load
Simulate grid conditions, test bidirectional energy flow, and utilize recovered energy – for energy-efficient testing of inverters and energy systems.
- ✓ 25 kVA in a single 3U unit
- ✓ AC output up to 450 V (L–N)
- ✓ DC output up to 650 V
Bidirectional Four-Quadrant AC/DC Power Supply with AC Grid Simulation
Kewell G9000: Bidirectional grid simulation for grid-connected equipment and energy systems
The Kewell G9000 is a bidirectional AC source/load system for grid simulation and electrical test tasks in development, validation, and production. In four-quadrant operation, source and sink functionality are combined in one system. In load mode, absorbed energy can be fed back regeneratively. A DC output mode extends the application range to DC-side testing (e.g., DC link, storage systems, DC bus).
High power density and fast dynamics with SiC technology
The Kewell G9000 is designed for a wide frequency range, high power density (e.g., 25 kVA in 3U), high measurement accuracy, and fast dynamic response.
It uses state-of-the-art wide-bandgap SiC power semiconductors.
Targeted testing of dynamic events, ride-through, and power quality
In sine mode, voltage/amplitude, frequency, and phase angle can be freely parameterized. Phase control can be coupled or independent. LIST/PULSE enables programmable profiles for dips, surges, and interruptions. Grid interruptions down to 1 ms are specified. For voltage ride-through, LVRT and HVRT tests are supported.
For power quality analysis, functions for harmonics and interharmonics are available. THD values and phase measurements are displayed in tabular form. Harmonic limits depend on function and frequency range.
AC/DC output mode and load models
DC operation is specified up to 650 VDC (max. 25 kW). The maximum DC output current corresponds to the AC RMS current in the respective mode (e.g., 120 A in 1-phase operation). In regenerative AC load mode, CR, CC, CP, and RLC modes are available. In addition, 14 predefined RLC models can be used for inverter and PCS testing.
Interfaces and scalability
For automated test setups, RS232, LAN, CAN, USB, as well as analog and digital I/Os are available.
For higher output power, the system supports parallel connection and modular stacking in 15U–24U frame systems.
Alternative Products
For AC grid simulation and regenerative load testing with lower power requirements, the Kewell G6000 Series offers a bidirectional AC/DC power source with an electronic AC load function in selected versions, rated up to 18 kVA.
If your application requires higher output power for high-power AC test systems, the Kewell A2000 Series provides in this case power ratings of up to 225 kW (Pro version).
Related Product Categories
Bidirectional Power Supplies | Power Supplies and Sources | Electronic Loads
Enquire now – and define the right test concept together with us
A short technical alignment with our team ensures that the G9000 series is optimally matched to your test tasks.
We support you in selecting the right solution and keep you up to date on current variants, options, and power levels.
Specifications
AC Output And Grid Simulation
| AC apparent power | 25 kVA in 3U) |
|---|---|
| Output phases | single-phase (1~) and three-phase (3~) |
| AC voltage range | 0–480 V (L–N) or 0–831 V (L–L) |
| AC current range | up to 40 A (3~) or up to 120 A (1~) |
| Frequency range | 0.01–450 Hz |
| Phase angle | 0–359.9° |
DC Output Mode
| DC output | up to 650 VDC, up to 120 A, max. 25 kW |
|---|
Disturbance Events And Grid Quality
| Short interruptions | grid interruptions can be simulated from 1 ms |
|---|---|
| Voltage THD (uTHD) | max. at 50/60 Hz; max. at 15–450 Hz |
| Harmonics | up to the 100th order (40–70 Hz) or up to the 25th order (71–200 Hz); max. harmonic content 40% |
Resolution
| Voltage resolution (AC) | 0.01 V |
|---|---|
| Current resolution (AC) | 0.01 A |
Integration And Expansions
| Interfaces | RS232, LAN, CAN, USB, as well as Analog I/O and Digital I/O |
|---|---|
| Power expansion | parallel operation and modular stacking in 15U–24U frame systems |
| Peak efficiency | up to 90% |
| Dimensions (W × H × D) | 445 × 131.5 × 699 mm |
| Weight | 40 kg |
AC Input
| Input voltage | 342–528 V |
|---|---|
| Input frequency | 47–63 Hz |
| Mains configuration/phases | 3-phase, 4-wire (3L/PE) |
| Max. input current | 47.3 A |
Environmental Conditions
| Operating temperature (ambient) | 0 to +40 °C |
|---|---|
| Storage temperature | −20 to +70 °C |
| Humidity | 0–90% RH (at 25 °C, non-condensing) |
| Installation altitude | up to 2000 m above sea level |
| Protection class | IP20 |
| Withstand voltage | 1500 VDC |
Options & Accessories
| Handles | |
| Interconnection cable for parallel operation | |
| Ethernet cable, 3 m | |
| 32 GB USB flash drive with software package and complimentary Kewell license | |
| DC protective cover | |
| AC protective cover | |
| Parallel communication module |
Scope of Delivery
| Device(s) of model G9000 |
| Power cord |
| Operating manual |
Applications
| PV inverter and grid connection tests (grid simulation, dips/surges/interruptions, ride-through) |
| Energy storage / BESS systems (grid-tied storage, bidirectional power flows) |
| Inverter/PCS testing including defined RLC load models (14 predefined RLC models) |
| New Energy Vehicles (NEV) / e-mobility (e.g., traction inverter, OBC, and system tests in development/validation) |
| AC wallboxes and DC fast chargers (charging infrastructure) - grid emulation and load/regenerative scenarios |
| Aerospace/aviation environments (e.g., higher frequencies, dynamic grid conditions) |
| Research institutes and universities (teaching, lab setups, validation) |
| General grid quality and power quality analyses (harmonics/interharmonics, THD/phase display) |
Links & Downloads
Available Documents (Subject to Change)
Supplier
Kewell Technology Co, Ltd, founded in 2011, is a pioneering manufacturer of intelligent manufacturing equipment and testing solutions for various industries.
The product lines are divided into the following areas:
- Power supplies for test systems
- Hydrogen energy test equipment and intelligent manufacturing equipment
- Power semiconductor and production line test systems
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