IT7900E Regenerative Grid Simulator

The IT7900E series is a programmable, four-quadrant grid simulator. It is also a four-quadrant power amplifier, which can be used to test various grid-connected equipment. For example, PCS, energy storage system, microgrid, BOBC (V2X), PHiL, etc. With advanced SiC technolgoy, a single unit of IT7900E can realize the anti-islanding protection test through islanding mode(RLC settable). Besides, the power density of IT7900E series is very high, 6kVA in 1U, 15kVA in 3U. After parallel connection, the power can be extended to 960kVA at most. Rich operating modes meet various test requirement of single-phase, three-phase, reverse-phase and multi-channel. In reverse mode, the voltage can be extended to 200% of the rated voltage. The strong arbitrary waveform editing function can simulate various power grid disturbance waveforms, making it an ideal choice for testing and R&D laboratories.

Product Features

Highlighted Features

♦ Adopt advanced SiC technology

♦ High power density/minimum rack space, 3U up to 21kVA

♦ 16Hz~150Hz

♦ Regenerative grid simulator & full 4-Quadrant AC&DC power sources

♦ Power Amplifier function for PHiL applications

♦ Three working modes： CV/Current Limit/Power Limit

♦ AC, DC, AC+DC or DC+AC output capability

♦ Comprehensive working modes selectable: single-phase, three-phase, reversed phase

♦ Programmable Output Impedance, allows simulation of real-World

♦ Utility Grid Impedance

♦ Compliance tests incl LVRT /Phase Jump/Frequency variation/

♦ Harmonic Injection

♦ Supported regulatory testing include IEC61000-4-11/4-13/4-14 /4-28

Features

♦ Wide voltage ranges: 350/700/1050 VL-N*2
♦ Master-slave parallel with current sharing technology, up to 1MVA+
♦ Intuitive touch screen;Built-in single/3-phase AC power meter; Scope function
♦ Fast response time and high accuracy 0.1%+0.2%FS
♦ Waveforms Library : Sine wave, Square wave,Triangle wave, Clipped sine waves, trapezoidal wave, self-defined waves
♦ Harmonics and Interharmonics waveform synthesizer
♦ Power line disturbance simulation testing by LIST programming/
♦ SWEEP/Surge&Sag functions
♦ Up to 50th harmonic simulation and analysis function is included, along with built-in IEC61000-3-2/3-12 and other test regulations *1
♦ Harmonic simulation and analysis function can measure 50th order, built-in IEC61000-3-2/3-12 and other test regulations
♦ Output 0-360 ° start/stop phase angle can be set
♦ Front panel USB port for data and waveform import and export
♦ Relay CTRL function, to cut off the connection between instrument and DUT
♦ Built-in USB/CAN/LXI compliant LAN interface/Digital IO interface, optional GPIB /Analog&RS232
♦ Support CANopen、Modbus、LXI、SCPI communication
*1. Voltage/current harmonic analysis
*2. Pls. refer to IT7900E high voltage version

Functions and Advantages 

Regenerative 4-Quadrant AC Grid Simulator

The IT7900E series are four-quadrant grid simulators with 100% of power sinking and 88% energy recovery capability. The power generated by the DUT can be fed back to the grid, rather than being dissipated as heat, which protects the environment and save the cost of  electricity, HVAC and cooling infrastructure.

Full 4-Quadrant Power Amplifier

The IT7900E series regenerative grid simulator can be used as a power amplifier to complete power hardware in the loop (PHIL) applications for microgrids, energy storage and new energy vehicles. The digital I/O or a standard suite of analog signal can be input via an external analog interface (optional) and then amplified without distortion to a real power waveshape with an external analog response time of less than 100us.

Master/Slave parallel, power up to 1MVA+

IT7900E series can be master-slave paralleled to to reach 1MVA+ output at most, flexible and convenient. IT7900E comes with synchronous On/Off input and output signals, which ensure the synchronization of paralleling and ensures synchronous current sharing of multiple modules. After paralleling, all functions are retained and there’s no loss of accuracy, making the construction of the power system faster, more flexible, and more economical, either it is a stand-alone test or ATE system.

Easy-to-operate interface, abundant operation modes

IT7900E series is equipped with innovative touch screen, simple and intuitive UI interface, and the keyboard knob design allows users to directly and quickly perform operations such as mode setting and waveform editing. The built-in digital oscilloscope function collects time-domain signals of voltage and current, phase relationship and performs waveform trigger functions. The oscilloscope sampling rate is up to 10us, and up to 6 oscilloscope curves can be displayed at the same time. Users can perform instantaneous analysis without an oscilloscope and save them in time.

Built-in various type of distorted waveforms

In addition to sine waveform, IT7900E series provides various standard AC waveforms, such as triangular wave, sawtooth wave, square wave,
trapezoidal wave and clipped sine wave. These waves can be easily recall from the menu and displayed in the LCD touch screen. Moreover, in
combination with sequence programming function, users can realize multiple waveform continuous output, to cope with complex power line
disturbance test.