All in one unit
IT7904-350-20U integrates 3 products, a grid simulator (IT7900), an AC/DC power supply (IT7800) and a regenerative AC/DC load (IT8200).
4-Quadrant output
IT7904-350-20U 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.
Professional Anti-islanding Test Mode
To meet the certification test of anti-islanding effect for grid-tied products, IT7904-350-20U 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.
Key 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 960 kVA
- 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 and Sag three waveform modes
- Harmonic simulation and analysis function up to 50 times
- 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
- 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
- Output frequency: 16-1400Hz
- 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
- Programmable output impedance, simulation of real-world impedance
- Harmonic/inter harmonic synthesis
- Frequency lock and phase lock function, tracking the external signal frequency and phase, to achieve 6 phase and 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 nine working modes such as CC/CR/CP/CV
- AC mode supports both rectified and non-rectified modes
- Adjustable crest factor: 1.414 to 5.0
- Support phase shift function in the range of -180 to 180.0 deg
- 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 factor function allows the current waveform to vary with the voltage waveform and the power factor is as close to 1 as possible
Connectivity:
- Built-in USB/CAN/LXI compliant LAN, Digital IO interface,
- Optional GPIB/analog and RS232 interface
