Programmable DC Power Supply (Solar Array Simulation Function) Model 62000H-S Series

ChipMOS has newly launched the solar cell array simulation power supply, Model 62000H-S series provides the highest simulation of solar cell array with open circuit voltage (Voc) up to 1800V and short circuit current (Isc) up to 30A in 3U high power module, and it has the design of fast response to simulate the output I-V curve of the solar cell, which can be applied in the testing of maximum power tracking (MPPT) performance of photovoltaic inverters, microinverters, and solar chargers. This can be applied to PV inverters, microinverters and solar chargers for maximum power tracking (MPPT) performance testing.

This 62000H-S series has a high-speed 100kHz digital data acquisition continuous measurement line and digital filtering mechanism, and high-speed 25kHz D/A control, which can accurately simulate the I-V curve and respond to the PV inverter's pull-load utility ripple effect. In the I-V curve simulation, the stand-alone machine is built-in with the EN50530 & Sandia mathematical model of the solar cell, which enables users to Simply set the solar cell I-V characteristics (Voc/Isc/Vmp/Imp) on the front panel of the stand-alone system and output a simulated solar cell array I-V curve to the PV inverter to test its static MPPT performance.

In addition, the actual solar array will be affected by weather conditions such as illumination, temperature, cloud cover, or rain, which will affect the output I-V curves. The 62000H-S series of stand-alone units allow users to store up to 100 I-V curves and set the desired output time for each curve, which allows users to test the long-time maximum power tracking performance of the photovoltaic inverters in different regions under different weather conditions.

The 62000H-S series is equipped with 16bit high resolution digital control and accurate voltage and current measurement mechanism, and with graphical operation software (Softpanel), which can test and display the maximum power tracking status of the PV inverter in real time, and test the MPPT EFF% readings, in addition, the user can select the measurement readings that want to be stored in the software.

High-power solar cell array simulation needs for commercial and power station PV inverter testing, users can simply connect two or more power modules in parallel to reach 1.5MW. 62000H-S series power supply with master/slave parallel control mode up to 16 288kW output, so that the parallel mode of operation is fast and easy, in this mode, the user simply through the front panel or remote digital control Master (Master unit) unit, the system will automatically download the set values to the slave (Slave unit) unit with high-speed synchronization signal control processing, and the system has a high-speed synchronization signal control processing. In this mode, the user only needs to control the master unit through the front panel or remote digital control, the system will automatically download the set values to the slave unit, with high-speed synchronized signal control processing, and the system has automatic equalization control.

The 62000H-S series DC power supply is easy to operate from the front panel pushbuttons or from a remote controller via Ethernet/USB/RS232/RS485/GPIB/APG control interface. With its compact 3U size, it can be stacked in a standard rack without any difficulty.

Model 62000H-S series DC power supply with fast response, controllable, repeatable, highly stable and accurate simulation of I-V curves, built-in EN50530 & Sandia's SAS model in a single unit can be easily and conveniently set the parameters of Voc, Isc, Vmp, Imp, etc. to produce an I-V curve output, and also has an I-V Program function that can store up to 100 I-V curves under different illumination and temperature in the memory, and can set the running time of each I-V curve (1-15,000S), and also provides a Table function to set the running time of each I-V curve (1-15,000S). In addition, the I-V Program function can store 100 I-V curves under different illumination and temperatures in the memory, and the running time of each I-V curve can be set (1-15,000S). In addition, it also provides a Table mode that allows the user to store V&I arrays of 128~4096 points through the digital interface, which allows the user to edit any shielded I-V curves, which is very suitable for verifying the following performances of the photovoltaic inverter. The above is very suitable for verifying the performance of PV inverters as follows.

• Designing & Validating Maximum Power Tracking Lines and Algorithm for Photovoltaic Inverters
• Verify the upper & lower limits of the inverter's allowable operating input voltage
• Verify the upper & lower limits of allowable operating input voltage at the maximum power point of the inverter
• Verification of static maximum power tracking efficiency of the inverter
• Measurement and verification of Overall E-% & Conversion E-%* for inverters.
• Verification of the inverter's maximum power tracking performance over dynamic curve changes (Built-in EN50530, Sandia, CGC/GF004, CGC-GF035, NB/T 32004 regulation test).
• Verification of Maximum Power Tracking Efficiency of the Inverter under Morning to Dusk Variation
• Verification of the inverter's maximum power tracking mechanism on I-V curves with solar cells shielded by clouds or trees
• Simulation of I-V curves at actual ambient temperature with burn-in room for inverter crash test
  *Additional power analyzers are required for measurement.

Model 62000H-S provides an excellent virtual instrumentation control panel through the digital interface (USB/GPIB/Ethernet/RS232) control control on the PC, the user can easily use this Softpanel software to edit the I-V curves and then download them to the stand-alone internal memory (1-100), and real-time output & measurement display of the PV inverter's max. Power tracking status and readings can be recorded in real time.

The purpose of PV inverter is to convert the maximum power output from solar cell (DC) to utility (AC), and the solar cell will change the output I-V curve according to the actual illumination and temperature, at this time, the PV inverter needs to be built-in a maximum power tracking (MPPT) mechanism in the machine, which can track the maximum output power of the solar cell in real time and feed it into the power grid or the battery for storage to build the optimal efficiency of PV power generation system. MPPT tracking performance will be a very important guideline for PV inverters, and this Softpanel has the ability to edit the I-V output of various solar cells (Thin-film, Standard Crystalline, Multi-crystalline and High-efficiency Crystalline). This Softpanel has the ability to edit the Fill Factor* of various solar cells (Thin-film, Standard Crystalline, Multi-crystalline and High-efficiency Crystalline), which allows users to easily design & validate the maximum power tracking line, algorithm, and tracking accuracy of the solar inverters.
*Fill Factor = (Imp*Vmp)/(Isc*Voc)

Users can use the I-V curve editing function in the graphical virtual panel software: Table mode & SAS mode to edit the I-V curve for simulation and then download it to the memory (1-100) of the 62000H-S series stand-alone computer. After editing the I-V curve of the solar cell arrays, the user can call the I-V curve to be tested on the screen to verify the maximum power point tracking mechanism (MPPT) performance of the PV inverter and display the tracking process on the screen in real time. After editing the solar cell I-V curves, the user can call the I-V curve to be tested on this screen to verify the MPPT performance of the PV inverter, and display the tracking process on this screen in real time. In addition, this function allows the user to set the MPPT Efficiency test duration, and it is recommended that the test duration for each point should be 60s-600s for the best MPPT EFF% efficiency analysis.

Since the dynamic maximum power point tracking performance also affects the inverter's effective utilization of the energy generated by the PV power system and the long-term investment benefits, regulations EN50530, Sandia, CGC/GF004, CGC/GF035 have established a standard dynamic maximum power point tracking performance test procedure, which allows inverter designers to test and improve the performance of the maximum power point tracking calculation. This allows inverter designers to test and improve the performance of the maximum power point tracking algorithm. Users can select the test items they want to test by using SoftPanel's built-in EN50530, Sandia, CGC/GF004, CGC/GF035 Dynamic MPPT test program, which can be used to test inverters in the R&D and QA phases, and to calculate Energy and MPPT EFF% in real time during the test process and to read the values of the test tracking process. Energy and MPPT EFF% can be calculated in real time as the test is performed, and readings from the test trace can be recorded.

With easy and convenient shielding curve simulation and shielding curve dynamic change simulation in the software (as shown in the right figure), the user can select the PV Module model from the database or create their own PV Module parameters stored, and then set the number of panels connected in series and parallel to form a PV Array array, then the user can set the illumination of the PV Module, the temperature parameters and the dynamic shielding change. Move direction and time, this can simulate the change of cloud cover or other shielding such as trees or buildings under the Shadow I-V curve simulation, each I-V curve for up to 4096 points of voltage and current composition.

In this Softpanel, a Sandia and EN50530 Photovoltaic I-V Curve Model is built-in, which allows the user to input the maximum input power value (Pmax), Fill Factor, Vmin, Vnom and Vmax of the PV Inverter to be tested, and then the user can directly Press the percentage of maximum power to be tested (5%, 10%, 20%, 25%, 30%, 50%, 75%, 100%), the Softpanel can automatically generate the I-V curve of the solar cell for this test, and then press to download it to the stand-alone computer directly and start to simulate the I-V curve. For PV Inverter to test Conversion Efficiency.
*Measurement with additional power analyzer required

This function allows users to input weather data (e.g. temperature and illumination) externally into SoftPanel via Excel files to simulate the effects of weather on solar arrays from early morning to dusk, such as sunshine, temperature, cloud cover, rain... and set the time resolution of 1 second between each I-V curve to test the dynamic MPPT performance of PV inverters. In addition, each I-V curve can be set to execute with an interval resolution of 1 second, which is convenient for users to simulate the weather conditions in different regions under real environment to test the dynamic MPPT performance of PV inverters.

In order to facilitate R&D & QA units to quickly verify the static & dynamic MPPT performance of PV inverters, users can edit the parameters of the inverter to be tested, such as Vmin, Vnom, Vmax, Pmax, Stabilization time &Testing period time, and then select the items to be tested in EN50530 & Sandia Lab. After selecting the EN50530 & Sandia project to be tested, the user can automatically execute the Static and Dynamic MPPT tests in the EN50530 & Sandia Lab that have been planned and completed, and then generate a report in an Excel table when the test project is finished.

The software will provide a test data logging function that allows the user to edit the measurement parameters to be logged, such as voltage, current, power, watt-hour, and MPPT efficiency, as well as the sampling interval (1 - 10,000s) and the total length of time to be logged, which will be convenient for analyzing and verifying the PV inverters.

When high power I-V analog power is required for commercial and power station PV inverter testing, two or more power supplies are usually connected in parallel. The 62000H-S series power supply features a Master/Slave intelligent parallel control mode for up to 16 units of 288kW, making parallel operation quick and easy as a Stand-Alone. In this mode, the Master sets the value and automatically downloads the data to the Slave, with high-speed synchronized signal control processing and automatic system equalization control.