TerraSAS (ETS Series)

Product: ETS (TerraSAS) Series
Description: Standalone Terrestrial Solar Array Photovoltaic Simulator

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For microgrids, energy storage, and inverter test applications, the TerraSAS™ series photovoltaic (PV) simulators are specifically designed to emulate the dynamic electrical behavior of a terrestrial PV solar array. They offer low output capacitance and high closed loop bandwidth to keep up with the advanced Maximum Power Point Tracking (MPPT) algorithms used in today’s grid-tied inverters. The Embedded TerraSAS (ETS) is a high performance solution in a small form factor that combines an agile power supply with an innovative I-V curve generator in a single standalone unit.
  • ETS 600 / 1000: For isolated and non-isolated string inverters up to 1000Vdc Voc.
  • ETS 60 / 80 / 150: For use with micro-inverters or DC optimizers up to 150Vdc Voc.

Application
Many solar inverters generate AC ripple on their DC input, which is connected to the photovoltaic array. For single phase inverters, the frequency of this ripple is twice the line frequency (120 Hz for US models). The simulator’s power supplies must not suppress this ripple as a function of their regulation loop. An increasing number of inverters (and virtually all micro-inverters) accurately measure amplitude and phase of the ripple voltage and current to quickly track the MPP of the array. This approach allows tracking the MPP at a much higher speed when compared to conventional dithering techniques (also called perturbate-and-observe). Faster tracking of the MPP results in a much higher overall efficiency in cloudy conditions, where the irradiance is constantly changing. It is likely that all solar inverters will use this approach in the near future, since end users are very sensitive to the overall efficiency of their solar energy installations. To satisfy this requirement, the PV simulator must be capable of reproducing the voltage / current behavior of a solar array at the ripple frequency. Most standard switching power supplies employ very large output capacitors and inductors in their output circuits and are unable to deliver the required performance - regardless of the response speed of the I-V curve controller. The Elgar TerraSAS line of PV simulators are based on high speed versions of our standard products, where output capacitors and other speed-limiting components have been adjusted. This results in a speed improvement of 10 times or better. Proprietary features built into the PV controller hardware and firmware, combined with our high speed power supplies, deliver the required performance. This technology was extensively tested on micro-inverters and is ready to test the next generation of inverters. The required performance is delivered by high speed switching power supplies and advanced Digital Signal Processing techniques. In some conditions traditional DC power sources using IGBT technology do not meet MPPT response speed requirements, depending on the MPPT principles. Our power supplies use Power MOSFETs, which typically switch ten times as fast as the most recent IGBTs. Higher switching frequency translates to smaller output capacitors and inductors - which is the key to a successful high speed power supply design.

Scalability
Power supplies are available in 850W, 5kW, 10kW, and 15KW increments. The 80V units are available in two power levels: 1200W for microinverters and 850W for the latest generation microinverters and DC power optimizers. The bandwidth on the 850W version has been improved to 30kHz by adding a linear regulation output stage. 600V and 1000V units are available in 5kW, 10kW, and 15kW versions depending on Isc requirements. All versions are easily connected in parallel to scale output power up to handle microinverters, string inverters, and even utility scale inverters. Many models can also be connected in series to handle higher voltage tests. Please refer to the connection diagrams located in the User Manual and follow appropriate wiring codes before connecting ETS PV simulators in series or paralle.

Features And Benefits
  • Low output capacitance
  • High bandwidth up to 30kHz
  • High resolution I-V curve simulates static and dynamic conditions
  • Designed for high speed Maximum Power Point Tracking (MPPT)
  • Can be integrated into a multi-channel system for higher power testing
  • Low voltage, high bandwidth version for DC Power Optimizers
  • EN50530 support
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ETS Software Installation and User Manual Rev H
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ETS1000 Operation & Maintenance Manual Rev G
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ETS150X5.6C Operation & Maintenance Manual Rev B
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ETS600X Operation & Maintenance Manual Rev C
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ETS60X14C Operation & Maintenance Manual Rev B
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ETS80X10.5C Operation & Maintenance Manual Rev B
Title
Document
Download
ETS Software Installation and User Manual Rev H
DocumentETS Software Installation and User Manual Rev H
ETS1000 Operation & Maintenance Manual Rev G
DocumentETS1000 Operation & Maintenance Manual Rev G
ETS150X5.6C Operation & Maintenance Manual Rev B
DocumentETS150X5.6C Operation & Maintenance Manual Rev B
ETS600X Operation & Maintenance Manual Rev C
DocumentETS600X Operation & Maintenance Manual Rev C
ETS60X14C Operation & Maintenance Manual Rev B
DocumentETS60X14C Operation & Maintenance Manual Rev B
ETS80X10.5C Operation & Maintenance Manual Rev B
DocumentETS80X10.5C Operation & Maintenance Manual Rev B
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Elgar ETS Data Sheet
Title
Document
Download
Elgar ETS Data Sheet
DocumentElgar ETS Data Sheet
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Elgar TerraSAS Software V2.0.0.6 and IVI driver V1.0.0 Windows 7/8/10 32/64 bit
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ETS Labview Driver V1.0.1 - Windows 32 bit for Labview 2013
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ETS Labview Driver V1.0.1 - Windows 64 bit for Labview 2012
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ETS Labview Driver V1.0.1 - Windows 64 bit for Labview 2013
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ETS Labview Driver V1.0.1 - Windows 32 bit for Labview 2012
Title
Document
Download
Elgar TerraSAS Software V2.0.0.6 and IVI driver V1.0.0 Windows 7/8/10 32/64 bit
DocumentElgar TerraSAS Software V2.0.0.6 and IVI driver V1.0.0 Windows 7/8/10 32/64 bit
ETS Labview Driver V1.0.1 - Windows 32 bit for Labview 2013
DocumentETS Labview Driver V1.0.1 - Windows 32 bit for Labview 2013
ETS Labview Driver V1.0.1 - Windows 64 bit for Labview 2012
DocumentETS Labview Driver V1.0.1 - Windows 64 bit for Labview 2012
ETS Labview Driver V1.0.1 - Windows 64 bit for Labview 2013
DocumentETS Labview Driver V1.0.1 - Windows 64 bit for Labview 2013
ETS Labview Driver V1.0.1 - Windows 32 bit for Labview 2012
DocumentETS Labview Driver V1.0.1 - Windows 32 bit for Labview 2012
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3rd party review by SANDIA National Laboratories, co-authored paper about TerraSAS
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Ametek_MX_SNK_App_Note_6-10-10.zip
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Electronic Products Magazine Article - Testing for Grid Tied Solar System Inverters
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MX with SNK option application note
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RS - MX with SNK option white paper
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Solar Magazine Cover and Surround the Inverter Editorial
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Surround the Inverter white paper
Title
Document
Download
3rd party review by SANDIA National Laboratories, co-authored paper about TerraSAS
Document3rd party review by SANDIA National Laboratories, co-authored paper about TerraSAS
Ametek_MX_SNK_App_Note_6-10-10.zip
DocumentAmetek_MX_SNK_App_Note_6-10-10.zip
Electronic Products Magazine Article - Testing for Grid Tied Solar System Inverters
DocumentElectronic Products Magazine Article - Testing for Grid Tied Solar System Inverters
MX with SNK option application note
DocumentMX with SNK option application note
RS - MX with SNK option white paper
DocumentRS - MX with SNK option white paper
Solar Magazine Cover and Surround the Inverter Editorial
DocumentSolar Magazine Cover and Surround the Inverter Editorial
Surround the Inverter white paper
DocumentSurround the Inverter white paper
ETS Model Numbers
Control Options Output islolation (V) Output leakage capacitance (nF) Voc (V) Isc (A)
ETS60X14C-PVF ±1000 45 60 14
ETS80X10.5C-PVF ±1000 45 80 10.5
ETS150X5.6C-PVF ±1000 45 150 5.6
ETS80X15C-PVE ±600 300 80 15
ETS600X8C-PVF ±600 200 600 8.3
ETS600X8D-PVF ±600 200 600 8.3
ETS600X8E-PVF ±600 200 600 8.3
ETS600X17C-PVF ±600 320 600 16.7
ETS600X17D-PVF ±600 320 600 16.7
ETS600X17E-PVF ±600 320 600 16.7
ETS600X25C-PVF ±600 440 600 25
ETS600X25D-PVF ±600 440 600 25
ETS600X25E-PVF ±600 440 600 25
ETS1000X10C-PVF ±1400 4.5 1000 10
ETS1000X10D-PVF ±1400 4.5 1000 10
ETS1000X10E-PVF ±1400 4.5 1000 10
ETS Model Numbers Continued
Control Options Power rating Input Voltage (AC) MPP Update Rate
ETS60X14C-PVF 840W 100-240VAC 250Hz (*)
ETS80X10.5C-PVF 840W 100-240VAC 250Hz (*)
ETS150X5.6C-PVF 840W 100-240VAC 250Hz (*)
ETS80X15C-PVE 1200W 110/220VAC 120Hz
ETS600X8C-PVF 5kW 208VAC 200Hz
ETS600X8D-PVF 5kW 400VAC 200Hz
ETS600X8E-PVF 5kW 480VAC 200Hz
ETS600X17C-PVF 10kW 208VAC 200Hz
ETS600X17D-PVF 10kW 400VAC 200Hz
ETS600X17E-PVF 10kW 480VAC 200Hz
ETS600X25C-PVF 15kW 208VAC 200Hz
ETS600X25D-PVF 15kW 400VAC 200Hz
ETS600X25E-PVF 15kW 480VAC 200Hz
ETS1000X10C-PVF 10kW 208VAC 200Hz
ETS1000X10D-PVF 10kW 400VAC 200Hz
ETS1000X10E-PVF 10kW 480VAC 200Hz
(*) these models also support power optimizers. Not intended for spacecraft or high frequency shunt switching regulators. Consult factory for this or any other special application.

Listed part numbers refer to the end user package that contains the PV Simulator, a full set of accessories, cables and user manual in print form. Please contact the factory to order PV simulators with a customized accessory kit.

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