IT7900P Series - 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.
