Home » Itech IT7900 series regenerative grid emulators
The Itech IT7900 series of regenerative grid emulators is yet another expansion is Itech’s range in the field of AC/DC power supplies.
The introduction of the IT7900 series of high power regenerative programmable AC/DC power supplies expands the range to include 5kVA, 6kVA, 9kVA, 12kVA and 15kVA versions. These are expandable up to 960kVA through master/slave configurations and parallel switching.
Let’s start with some basic specifications. Starting with the 6kVA version, there is a possibility of a single phase output, a three phase output, a “reverse phase” output for high voltages and a multi-channel output with three, independently adjustable, single phase outputs. The unit can be used for single phase grid, three phase grid, reverse phase grid (for 700Vrms) and multi-channel AC power supply. With multiple units it is also possible to emulate a 6 phase grid or 12 phase grid. The voltage of each phase is adjustable up to 350V L-N and the frequency from 16Hz – 150Hz. The phases are also individually adjustable from 0° – 360°, this allows an unbalanced grid to be simulated, among other things. In AC grid emulator mode, all kinds of grid contamination and harmonics can also be generated, even arbitrary waveforms.
The IT7900 multifunctional power supply gives the user the choice of no less than four different output modes, namely AC, DC, AC + DC and DC + AC. Thus, there is the possibility to simulate both an AC grid and a DC grid. But also an AC grid where a DC offset applies. It is even possible to simulate a DC grid with an AC ripple.
If testing is required according to the IEC EMC standards or Aerospace Defence standards, the IT7900 is an ideal partner. To save the user time, the power supply is equipped with pre-programmed routine tests for the IEC61000-4-11, 13, 14, 17 and 28 standards. All possible grid distortions and events can be applied to the waveforms. These include spikes, dips, interrupts, sags and surges. Through the STEP, LIST and PULSE modes, the various simulations can also be linked. Also harmonic distortions (up to the 50st at 50 or 60Hz) and interharmonic distortions can be generated.
Because the output impedance of the IT7900 is adjustable, the IEC61000-3-3 flicker standard can also be verified. For aviation and military, the following standards are available; ABD0100.1.8, ABD A350, ABD AMD24, Boeing 787, DO160, MIL-STD-704 and MIL-STD-1399-300B.
The IT7900 also features an accurate and comprehensive Power analyzer. Parameters such as Crest Factor, power factor, active, reactive and apparent power are measured and optionally also stored in the internal memory for trend research. With the trend analysis function, these measured values can then be visualized graphically in detail.
The Itech IT7900 high power programmable AC/DC power supply has a clear and user-friendly user interface, which can be operated via a large high-resolution touch display or with PC software. The common communication ports such as USB, LAN, CAN and Digital I/O are standard present. Optionally one can also choose for GPIB and RS232.
Open the datasheet for detailed specifications of this product.
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"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."
University of Luxembourg
“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”
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