The document outlines the capabilities and features of Electronic Enterprises (India) Pvt Ltd's modular programmable power solutions, including Specialized PV inverter test solutions and the Terrasas solar array simulator. It highlights the importance of accurate simulations for testing PV systems, detailing various products designed for reliable performance in renewable energy applications, military programs, and scientific research. The document further discusses compliance testing for grid-tie inverters and future standards relevant to the industry.

1. PV Inverter Test Solutions
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

2. Products &
Solutions
Products
Modular ATE
Power systems
● Broadest Programmable Power Line in the
world
● DC Power Supplies
Programmable
● DC Loads AC sources
and Loads
● Modular ATE supplies
Programmable
● AC Power Sources DC supplies
and Loads
● AC Loads Bench-top
DC supplies
Solutions
● Power Bus Simulation Complete
Engineered
— Spacecraft Solutions
— Renewable Energy
— Aviation
— Transportation
● Scientific Research
● OEM Integration
● Military Programs
● Division HQ located in San Diego, California
● ～450 Employees
● ～120,000 ft2 (11,100 m2) in two buildings:
— Marketing & Product Management
— Power, Digital, Software & Systems Engineering
— SMT & Through Hole PCBA Manufacturing,
Product Sub and Final Assembly and Test and
Systems Integration and Test
● ISO 9001 Compliant Quality System
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

3. “Surround the Inverter” test system
BSS
(Battery String Simulator)
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AC
MX Series AC/DC source
(Utility Simulator and Regenerative unit)
Programmable
TerraSAS
AC Load
(PV Simulator)
Control Software
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

4. TerraSAS
Terrestrial Solar Array Simulator
AMETEK Solar Array Simulation
History
● The world-wide Leader
● Application: Testing Satellites for Development &
Production
● Function: Simulates satellite solar panels behavior in
both Static and Dynamic modes like Eclipse and Spin
● Benefits: Flexible and modular from 1 channel to
any channel count
—Fully Integrated
—Fully warranted
—World-wide support
From Solar Cells to Installations
● Solar cells operate like a battery when illuminated
from the sun
● Combining cells into panels generates higher
voltage and power very similar to batteries
PV Cell PV Module
(2.3VDC) (~60VDC @ ~250W)
PV Array
(~600VDC @ 20,000W)
Solar Cell Characteristics
Solar Cell
● There is a difference in output voltage and current
characteristics for a standard DC power supply and a Typical DC
solar panel. Power
— A Power Supply is a “stiff” source meaning that the Supply
voltage is constant regardless of the load.
— The Solar Cell is a “soft” source in that the voltage
drops off as you load it
● The output power characteristic for a solar panel is Solar Cell
important because the PV inverter needs to operate at
the peak power point to return the most power back to
the utility grid
Single Power point Multiple Power points
● A grid connected PV inverter must operate on the
Maximum Peak Power Point (MPPT) to efficiently
convert this energy
● It must also pick the correct maximum power point
even when the PV panel is shaded
Solar Panel Solar Panel
(Full Sun) (Shadowed)
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

5. Power Supply Comparison
Good
Tracking ● Just creating an IV curve does not assure a power
supply will track a PV Inverter
— Response time to load changes and MPPT algorithms
are critical
— Modifications must be made to the power supply’s
Not
control loops and output capacitance to provide a
Tracking
realistic simulation
● If the power supply is too slow it will not track the IV and
the inverter will not be tested properly and can become
unstable.
TerraSAS System
● Available in three versions:
— Micro Inverter for 300-600W, low voltage
— Non-Isolated up to 600V per channel
— Isolated up to 1000V per channel
● Statically Simulates:
— Various solar cell material curves
— Different panel configurations
— Multiple power points
● Dynamically simulates the change in array output
based upon fluctuations in light energy and
temperature
● Simulates test protocols and events that any solar
installation will be subjected to
● Working/Designing with customers to establish to
provide best possible product
Multiple Configuration Examples
● Completely Independent Channels
● Three power modules available
— 1200W/ch for Micro-Inverters
— 600V@15KW/ch for Isolated Inverters
— 1000V@10KW/ch for non-isolated Inverters
● Can be programmed independently or paralleled to
provide high-power channels
● Can simulate shadowed panels and moving shadows
● Panel configurations at installation sites are easily
created and managed independently
Two 105KW channel, 600V TerraSAS system
High-Performance Capability
Competitor’s
Flat Top IV Curve
● Programmable irradiance levels from 0-2,000/m2
● Programmable temperature from -100 to +100 C
● Programmable Fill Factor from 0.5 - 0.95
● 1024 data points the TerraSAS generates a more
accurate IV curve, with no “flat spots” in the IV curve
● 120Hz MPPT Frequency
TerraSAS Smooth IV Curve
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6. Sandia National Lab Relationship Unique Dynamic Simulation
…This fully-integrated PV simulator from AMETEK has
performed well in preliminaryevaluations and has shown ● The TerraSAS simulates irradiance level, temperature level, and
the flexibility necessary to exercise the variations in MPPT simulation time to ramp the voltage, temperature or irradiance
algorithms… level over time
● Uses any IV curve previously defined
● This ability allows the unitto simulate dynamicirradiance and
temperaturegoing from night to day orfrom a clear day to
cloudcover
Graphical User Interface
Array
Create Your Own Curve
Integrated Solar Panel library
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

7. Programmable Parallel and Series
String Configurations
Measurement Data Logging
Isolated Output Channels
To test non-isolated inverters, isolated PV simulator is
AC
PV - Channel
required to prevent the inverter GFI / DGFI from tripping by
DC Power Supply DC Output PV - inverter under test AC
DC common mode noise.
Simulating Section Non - isolated (transformerless) (in/out)
PV solar panel
AC
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8. MX/RS Series
AC and DC Programmable
Power Source Bi-Directional and
Regenerative!
MX/RS Series
● Programmable AC, DC and AC+DC power Source
● Regenerative sink option
— Returns power back to the utility line
● MX Series: 15KVA – 270KVA
● RS Series: 90kVA – 540kVA
● Harmonic Waveform
Generation
— Fund-50th MX-45
● Harmonic Analyzer measuring Fundamental to 50th (45KVA)
● Simulate utility disturbances RS-90
(90KVA)
SNK(Regenerative) Option
● The –SNK or current sink option enables the MX to feed
energy back onto the grid when testing grid-tied products.
● The ability of the MX to simulate the grid provides unique
opportunities to test the EUT for immunity to commonly
occurring line anomalies like voltage and/or frequency
fluctuations.
● The SNK option requires special amplifiers that have
a different control loop from the standard MX amplifiers.
This different control loop ensures greater stability under
regenerative load conditions.
Low Voltage Ride Thru Test (LVRT)
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

9. Utility Simulation – MX Series
● Anti-islanding
● Utility disturbances
— Phase loss
— Voltage dips and interruptions
— Frequency disturbances
● DC injection
● Harmonically enriched waveforms test
inverter tracking capability
● Test against Interharmonic susceptibility
Voltage Variations
● Source voltage varied from 240V – 195V. The result is
that the inverter detects the low voltage and shuts down
at 205V
MX applies MX voltage Inverter Inverter
power step-down power-up Shut-down
Frequency Fluctuations
● The inverter must disconnect itself in the event of a
frequency variation that is out of tolerance.
● In this example, the inverter being tested has a default
setting with a “low” trip limit of 59.3 Hz, and a high limit
of 60.50 Hz.
● The Mx was programmed to start at 60 Hz, and then
successively go to 59.80 - 60.20 – 59.60 – 60.40 – 60.60Hz
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10. Voltage Distortion Test
● Inverter behavior when the unit is subjected to significant
distortion of the public supply (i.e. the immunity and
emission of the inverter are both tested in this case)
LD Series
Programmable AC Load
Programmable AC Load
● Programmable AC Load
● 3kVA-18kVA
● Operating Modes
— Constant Current
— Constant Voltage
— Crest Factor
— Power Factor
— Short Circuit
● Load transient generation in any mode with 1msec
programming resolution
● 45-440Hz
House Loads Simulation
BSS
Battery String Simulator
Battery String Simulator
● Fully programmable behavior both Static and Dynamic
modes
● Battery behavior easily modified via spreadsheet
download to simulate and battery topology including
Nickel Metal Hydride, Lithium Ion, and Nickel Cadmium
● Sensor simulation available to provide thermistor, strain
gauges, heater loads, and cell bypass/short.
For more information:
Electronic Enterprises (India) Pvt Ltd
R Suman, rsuman@eeipl.in
+91-40-23243352

11. CTS
Compliance Test System
New IEC/TR 61000-3-15
Assessment of low frequency electromagnetic immunityand
emission requirements for dispersed generation systems in
Low Voltage networks
Inverter Compliance Test System
● IEC 61000-3-15 (in draft)
— 2010 Emissions (harmonics and flicker)
— Compliance Test for Grid- Tie Inverters
— Similar to IEC 61000-3-2/3 and 3-11/12
— CTS release scheduled for Dec., 2011
● Requires AC mains simulation, i.e. regenerative capability
● Interharmonic susceptibility test
● Country defined DC injection
— CTS release scheduled for Dec., 2011
● AMETEK CTS is number one in the market
Future Compliance Test Solutions
● IEC 62116-2008 ● IEC TS 62578
● IEC61000-3-15(in draft) ● IEC 62124
● GS S1 - TUV ● UL1741
● IEC 61727 ● IEEE1547
● GB/T19064
● GB/T19535
● EN50530
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