IT7900EP High Performance Regenerative Grid Simulator

Adopting advanced SiC technology, the IT7900EP series high-performance Regenerative grid simulator provides an all-in-one test solution that can be used not only as a grid simulator and four-quadrant power amplifier, but also as a four-quadrant regenerative AC/DC electronic load.The full four-quadrant operation, regenerative ability can feedback power to the grid, meet the needs of environmental protection, but also save a lot of electricity and heat dissipation costs. Compact, modular and efficient structure design allows the IT7900EP up to 21kVA in 3U single unit, and its power can be extended to 1MVA after master-slave parallel connection. Colorful touch screen with intuitive GUI allows IT7900EP to directly define different waveforms. The rich operation modes can meet the test requirement of single-phase, three-phase, reverse-phase. It provides high flexibility for testing and can be widely used in many fields such as PV, ESS and EV.

Product Features

Parameter Features
♦ Adopt advanced SiC technology
♦ High power density, up to 21 kVA for 3U
♦ Voltage can reach 350V L-N
♦ Highly efficient power regeneration
♦ Master and slave equal flow, parallel machines up to 1MVA
♦ Comprehensive working modes selectable: single-phase, three-phase, reversed phase and multi-channel, Voltage extension to 200% of rated voltage in reversed mode
♦ Support LIST/SWEEP/Surge&Sag three waveform modes
♦ Built-in rich waveform database
♦ Harmonic simulation and analysis function up to 50 times, built-in IEC61000-3-2/3-12*1
♦ Can simulate arbitrary waveform output, support CSV file import waveform
♦ Phase angle 0-360° settable
♦ Touch screen design, simple UI interface
♦ Built-in USB/CAN/LAN /Digital IO interface,optional GPIB/analog & RS232
interface
♦ Full protection functions including automatic clearing,POVP ,watchdog, etc.
Support CANopen*2、Modbus、LXI、SCPI communication

Source Features

♦ Regenerative grid simulator & full4-Quadrant AC&DC power sources

♦ Frequency: 16-2400Hz *3

♦ Power Amplifier function for PHiLapplications

♦ Four output modes of AC/DC/AC+DC/DC+AC canbe realized

♦ Programmable output impedance,simulation ofreal-world impedance

♦ Harmonic/inter harmonic synthesis

♦ Compliance tests incl. LVRT /PhaseJump/Frequency variation/harmonic injection

♦ Supported regulatory testing includeIEC61000-4-11/4-13/4-14/4-28

♦ Optional software can help complete thepre-compliance standards test of civil avionics/electrical shipsinterms of the multi-national safety regulations.

Load Features

♦ Regenerative full 4-Quadrant AC&DC load

♦ Frequency: 16-500Hz

♦ AC mode supports CC/CP/CR/CS/CC+CR/CE multiple operating modes, and CE mode can simulate a variety of circuit topologies such as single-phase rectifier RLC and shunt RLC.

♦ DC mode supports 9 working modes such as CC/CR/CP/CV

♦ AC mode supports both rectified and non-rectified modes

♦ Adjustable crest factor: 1.414 ~ 5.0

♦ Support phase shift function in the range of -180º~180º *4

♦ The unit power factor1 function allows the current waveform to vary with the voltage waveform and the power factor is as close to 1 as possible

♦ Supporting unloading angle control, 0-359° adjustable

*1.Voltage/current harmonic analysis, v oltage harmonic simulation in sour ce mode, current harmonic simulation in load mode, fundamental wa ve≤60Hz

*2.Stay tuned

*3 In grid simulator and islanding simulation mode, 16~150Hz

*4 After turning on the rectification function, the setting range of the phase shift is restricted by the crest factor

Functions and Advantages 

All in one unit

IT7900EP series integrates 3 products, a grid simulator, an AC/DC programmable power supply and a regenerative AC/DC load.

4-Quadrant output

IT7900EP series is not only a full four-quadrant power grid simulator, but also a full four-quadrant AC/DC electronic load. It can operate in all four quadrants. The efficient energy regeneration function makes it good for testing the frequency change of grid-connected PV inverters, voltage transients and anti-islanding protection.

High power regeneration efficiency

Whether it is used as a grid simulator or a load, in AC or DC mode, the IT7900EP is high efficiently power regenerative. The energy generated by the DUT can be fed back to the local grid instead of dissipating in the form of heat, which is good for energy-saving and environment protection.

Simulate power grid and low voltage ride through (LVRT) testing

Low voltage ride-through refers to the ability of the power generation system to continue to operate without disconnecting from the grid within a certain
range of voltage drop when the grid fault or disturbance causes a voltage drop, and even provides a reactive power to help the system recover the
voltage. You can edit the test parameters under LVRT condition. With the fast response, it can fully meet the test requirements of LVRT. At the same time,
the IT7900EP series has the function of arbitrary waveform. With the LIST function, it can edit and simulate various grid disturbance waveforms through
the panel or software, such as instantaneous power failure, surge and voltage rise and fall.