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IT7900P Series - High-Performance Regenerative Grid Simulator
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IT7900P High-Performance Regenerative Grid Simulator
Built on advanced SiC (Silicon Carbide) technology, the IT7900P series delivers a comprehensive, all-in-one power testing solution. It can operate as:
- A grid simulator
- A four-quadrant power amplifier
- A four-quadrant regenerative AC/DC electronic load
With full four-quadrant operation and regenerative capability, the system feeds energy back to the grid, supporting environmentally friendly testing while significantly reducing electricity consumption and heat dissipation costs.
Its compact, modular, and high-efficiency design enables up to 15 kVA in a 3U chassis, with scalable power up to 960 kVA through master-slave parallel configuration.
A color touch screen with an intuitive graphical user interface allows users to directly define and customize output waveforms. Multiple operating modes—single-phase, three-phase, reverse-phase, and multi-channel—provide exceptional flexibility for applications in photovoltaic (PV), energy storage systems (ESS), electric vehicles (EV), and other advanced power electronics fields.
Key Parameter Features
- Advanced SiC technology
- High power density: up to 15 kVA in 3U
- Output voltage up to 350 V L-N
- Master-slave current sharing; scalable up to 960 kVA (up to 64 units in parallel for 3U models)*¹
- High-efficiency regenerative operation
- Selectable working modes: single-phase, three-phase, reversed phase, and multi-channel
- Inverted mode voltage extension up to 200% of rated voltage
- LIST, SWEEP, and Surge & Sag waveform modes
- Built-in waveform library
- Harmonic simulation and analysis up to the 50th order, compliant with IEC 61000-3-2 and IEC 61000-3-12*²
- Arbitrary waveform generation with CSV import capability
- Adjustable phase angle: 0–360°
- Touchscreen interface with intuitive UI
- Standard USB / CAN / LAN / Digital I/O interfaces; optional GPIB / Analog & RS232
- Comprehensive protection functions including automatic clearing, POVP, watchdog, etc.
- Support for CANopen, Modbus, LXI, SCPI communication protocols
Source Mode Features
- Regenerative grid simulator & full four-quadrant AC/DC power source
- Frequency range: 16–2400 Hz*⁴
- Power amplifier function for PHiL applications
- Professional islanding test mode supporting R, L, C, active and reactive power settings*⁷
- Four output modes: AC / DC / AC+DC / DC+AC
- Multi-channel function: one unit can test 1–3 DUTs simultaneously*⁵
- Programmable output impedance for real-world grid simulation
- Harmonic and inter-harmonic synthesis
- Frequency lock and phase lock functions enabling 6-phase and 12-phase output
- Compliance testing including LVRT, phase jump, frequency variation, and harmonic injection
- Supported regulatory tests including IEC 61000-4-11, IEC 61000-4-13, IEC 61000-4-14, IEC 61000-4-28, etc.
- Advanced trigger configuration with synchronized waveform capture for DUT voltage acquisition and simulation
- Optional software for pre-compliance testing in civil avionics and marine electrical systems according to international safety regulations*³
Load Mode Features
- Regenerative full four-quadrant AC/DC electronic load
- Frequency range: 16–500 Hz
- AC mode supports CC / CP / CR / CS / CC+CR / CE modes
- CE mode simulates various circuit topologies such as single-phase rectifier RLC and shunt RLC
- DC mode supports 9 operating modes including CC / CR / CP / CV
- AC mode supports rectified and non-rectified operation
- Adjustable crest factor: 1.414–5.0
- Phase shift adjustment range: **-180° to 180°***⁶
- Unity power factor mode for dynamic current tracking of voltage waveform
- Adjustable unloading angle: 0–359°
Notes
*¹ For 3U models, up to 64 units can be connected in parallel.
*² Harmonic analysis in source mode (voltage) and load mode (current); fundamental frequency ≤ 60 Hz.
*³ Optional software module.
*⁴ 16–150 Hz in grid simulator and island simulation modes.
*⁵ Not available for single-phase models.
*⁶ Phase shift range may be limited when rectification mode is enabled.
*⁷ Not available in multi-channel mode.
Functions and Advantages
All-in-One Integrated Platform
The IT7900P series combines three core products into a single, compact solution:
- IT7900 grid simulator
- IT7800 AC/DC power supply
- IT8200 regenerative AC/DC electronic load
This fully integrated architecture simplifies laboratory setups while maximizing flexibility and equipment utilization.
Full Four-Quadrant Operation
The IT7900P series operates as both a full four-quadrant grid simulator and a full four-quadrant AC/DC electronic load. It can source and sink power seamlessly in all four quadrants.
Its high-efficiency regenerative capability makes it particularly suitable for testing:
- Frequency variations of grid-connected PV inverters
- Voltage transients
- Anti-islanding protection performance
High-Efficiency Power Regeneration
Whether operating in AC or DC mode, as a grid simulator or as a load, the IT7900P offers highly efficient energy regeneration.
Energy generated by the device under test (DUT) is fed back to the local grid instead of being dissipated as heat. This significantly reduces energy consumption, lowers cooling requirements, and supports environmentally responsible testing.
Professional Anti-Islanding Test Mode
To meet certification requirements for grid-connected products, the IT7900P series provides a dedicated anti-islanding test mode.
Users can:
- Adjust RLC parameters
- Configure active and reactive power settings
- Simulate purely resistive or nonlinear grid loads
This enables verification of anti-islanding protection response times under varying equivalent impedances, balanced and unbalanced three-phase conditions.
The integrated solution simplifies test setups and eliminates the need for additional RLC loads and external power meters, reducing both system complexity and cost.
Integrated Data Acquisition and Simulation
The IT7900P series incorporates an advanced DSP-based data acquisition system, offering measurement and waveform analysis functions comparable to:
- A digital oscilloscope
- A power meter
- A digital multimeter
Measurement accuracy:
- Current: up to 0.1% + 0.2% FS
- Voltage: up to 0.1% + 0.1% FS
Up to six oscilloscope waveforms can be displayed simultaneously, reducing external instrumentation requirements and simplifying wiring.
The trigger configuration allows synchronized capture of DUT voltage waveforms for accurate data acquisition and simulation. Users can also import recorded abnormal grid voltage data into the IT7900P to reproduce real-world grid conditions, define repetition cycles, apply offsets, and customize waveform parameters.
Grid Simulation and Low Voltage Ride Through (LVRT) Testing
Low Voltage Ride Through (LVRT) refers to the ability of a power generation system to remain connected to the grid during voltage dips caused by faults or disturbances, and in some cases to provide reactive power support for voltage recovery.
The IT7900P allows users to configure LVRT test parameters directly. With its fast dynamic response, it fully meets LVRT testing requirements.
In addition, the arbitrary waveform generation and LIST functions enable simulation of various grid disturbance conditions, including:
- Instantaneous power interruptions
- Voltage surges
- Voltage rise and drop events
These capabilities can be configured directly via the front panel or control software, ensuring comprehensive grid compliance testing.
IT7900P
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Référence
IT7900P High-Performance Regenerative Grid Simulator
Built on advanced SiC (Silicon Carbide) technology, the IT7900P series delivers a comprehensive, all-in-one power testing solution. It can operate as:
- A grid simulator
- A four-quadrant power amplifier
- A four-quadrant regenerative AC/DC electronic load
With full four-quadrant operation and regenerative capability, the system feeds energy back to the grid, supporting environmentally friendly testing while significantly reducing electricity consumption and heat dissipation costs.
Its compact, modular, and high-efficiency design enables up to 15 kVA in a 3U chassis, with scalable power up to 960 kVA through master-slave parallel configuration.
A color touch screen with an intuitive graphical user interface allows users to directly define and customize output waveforms. Multiple operating modes—single-phase, three-phase, reverse-phase, and multi-channel—provide exceptional flexibility for applications in photovoltaic (PV), energy storage systems (ESS), electric vehicles (EV), and other advanced power electronics fields.
Key Parameter Features
- Advanced SiC technology
- High power density: up to 15 kVA in 3U
- Output voltage up to 350 V L-N
- Master-slave current sharing; scalable up to 960 kVA (up to 64 units in parallel for 3U models)*¹
- High-efficiency regenerative operation
- Selectable working modes: single-phase, three-phase, reversed phase, and multi-channel
- Inverted mode voltage extension up to 200% of rated voltage
- LIST, SWEEP, and Surge & Sag waveform modes
- Built-in waveform library
- Harmonic simulation and analysis up to the 50th order, compliant with IEC 61000-3-2 and IEC 61000-3-12*²
- Arbitrary waveform generation with CSV import capability
- Adjustable phase angle: 0–360°
- Touchscreen interface with intuitive UI
- Standard USB / CAN / LAN / Digital I/O interfaces; optional GPIB / Analog & RS232
- Comprehensive protection functions including automatic clearing, POVP, watchdog, etc.
- Support for CANopen, Modbus, LXI, SCPI communication protocols
Source Mode Features
- Regenerative grid simulator & full four-quadrant AC/DC power source
- Frequency range: 16–2400 Hz*⁴
- Power amplifier function for PHiL applications
- Professional islanding test mode supporting R, L, C, active and reactive power settings*⁷
- Four output modes: AC / DC / AC+DC / DC+AC
- Multi-channel function: one unit can test 1–3 DUTs simultaneously*⁵
- Programmable output impedance for real-world grid simulation
- Harmonic and inter-harmonic synthesis
- Frequency lock and phase lock functions enabling 6-phase and 12-phase output
- Compliance testing including LVRT, phase jump, frequency variation, and harmonic injection
- Supported regulatory tests including IEC 61000-4-11, IEC 61000-4-13, IEC 61000-4-14, IEC 61000-4-28, etc.
- Advanced trigger configuration with synchronized waveform capture for DUT voltage acquisition and simulation
- Optional software for pre-compliance testing in civil avionics and marine electrical systems according to international safety regulations*³
Load Mode Features
- Regenerative full four-quadrant AC/DC electronic load
- Frequency range: 16–500 Hz
- AC mode supports CC / CP / CR / CS / CC+CR / CE modes
- CE mode simulates various circuit topologies such as single-phase rectifier RLC and shunt RLC
- DC mode supports 9 operating modes including CC / CR / CP / CV
- AC mode supports rectified and non-rectified operation
- Adjustable crest factor: 1.414–5.0
- Phase shift adjustment range: **-180° to 180°***⁶
- Unity power factor mode for dynamic current tracking of voltage waveform
- Adjustable unloading angle: 0–359°
Notes
*¹ For 3U models, up to 64 units can be connected in parallel.
*² Harmonic analysis in source mode (voltage) and load mode (current); fundamental frequency ≤ 60 Hz.
*³ Optional software module.
*⁴ 16–150 Hz in grid simulator and island simulation modes.
*⁵ Not available for single-phase models.
*⁶ Phase shift range may be limited when rectification mode is enabled.
*⁷ Not available in multi-channel mode.