IT7900P Series
High Performance Regenerative Grid Simulator

Parameter Features

♦ High power density, up to 6 kVA for 2U and 15 kVA for 3U
♦ Voltage can reach 350V L-N
♦ Master and slave equal flow, parallel machines up to 960kVA *1
♦ Highly efficient energy return
♦ Comprehensive working modes selectable: single-phase, three-phase, reversed phase and multi-channel, ♦ Voltage extension to 200% of rated voltage in inverted mode
♦ Support LIST/SWEEP/Surge&Sag three waveform modes
♦ Harmonic simulation and analysis function up to 50 times *2
♦ Built-in rich waveform database
♦ Can simulate arbitrary waveform output, support CSV file import waveform
♦ Phase angle 0~359°settable
♦ Touch screen design, simple UI interface
♦ Built-in USB/CAN/LXI compliant LAN /Digital IO interface,optional
♦ GPIB/analog & RS232 interface
♦ A variety of protection functions, including automatic clearing protection, transient overvoltage protection POVP
Software watchdogs, etc.

Source Features

♦ Regenerative grid simulator & full 4-Quadrant AC&DC power sources
♦ Frequency: 16-2400Hz
♦ Power Amplifier function for PHiL applications
♦ Professional islanding test mode, support R, L, C and active, reactive power settings
♦ Four output modes of AC/DC/AC+DC/DC+AC can be realized
♦ Multi-channel function, single unit can test 1-3 DUTs at the same time *3
♦ Programmable output impedance,simulation of real-world impedance
♦ Source Features
♦ Harmonic/inter harmonic synthesis
♦ Frequency lock and phase lock function, tracking the external signal frequency and phase, to achieve 6 phase& 12 phase power output
♦ Compliance tests incl. LVRT /Phase Jump/Frequency variation/harmonic injection
♦ Supported regulatory testing include IEC61000-4-11/4-13/4-14/4-28 etc.
♦ Provide rich trigger configuration, synchronous capture of the voltage waveform of the object to be measured, to achieve data acquisition and simulation functions

Load Features

♦ Regenerative full 4-Quadrant AC&DC load
♦ Output 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~180.0º *4
♦ When the three-phase AC, support Y and Δ two kinds of access, Y type connection when the support C-phase phase loss function
♦ Support with load-on
♦ Support positive or negative half-cycle pull load
♦ 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

*1 3U model only
*2 Voltage/current harmonic analysis, voltage harmonic simulation in source mode, current harmonic simulation in load mode
*3 Multi-channel function is not available for single-phase models
*4 When rectification function is turned on, the setting range of phase shift is bounded by the peak factor

All in one unit

IT7900P series regenerative grid simulator integrates 3 products, a grid simulator(IT7900), an AC/DC power supply (IT7800) and a regenerative AC/DC load (IT8200).

4-Quadrant output

IT7900P series regenerative grid simulator 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 IT7900P regenerative grid simulator 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.

Professional Anti-islanding Test Mode

To meet the certification test of anti-islanding effect for grid-tied products, the IT7900P series regenerative grid simulator provide a professional anit-islanding test mode. Users can adjust RLC parameters or configure the parameters of active power and reactive power to achieve the effect of simulating purely resistive or nonlinear grid loads, and further verify the anti-islanding protection response time of grid-tied DUTs under different equivalent impedances, three-phase load balancing and non-balancing conditions. The solution helps engineers to simplify the test circuit and cost savings of additional equipment such as RLC load and power meter.

Data acquisition and simulation

IT7900P series regenerative grid simulator integrates an advanced data acquisition system based on digital signal processor, and provides measurement and waveform analysis functions of a digital oscilloscope, a power meter and a digital multimeter. Its current measurement accuracy is as high as 0.1%+0.2%FS, and the voltage measurement accuracy is as high as 0.1%+0.1%FS. 6 oscilloscope curves can be displayed at the same time, which not only saves the cost, but also saves the time for wiring connection. The trigger configuration of IT7900P can synchronously capture the voltage waveform of the DUT, and realize the functions of data acquisition and simulation. The user can import the collected abnormal voltage data of the
power grid into the IT7900P regenerative grid simulator to reproduce the power grid status, set the repetition times, offset and other parameters of the waveform.

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 IT7900P series regenerative grid simulator 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.