Recycled Grid Analog Power Supply Model 61830/61845/61860/61800-100/61800-100 (800VLN)

The 61800 Series Recycled Grid Analog Power Supplies are constant voltage outputs that can be applied to the testing of general power products (e.g., home appliances, switching power supplies). 61800 Series will output power to the load, and at the same time protect the 61800 with the overcurrent protection setting (OCP). 61800 Series will activate the energy recovery mechanism if the test object is a product that will feed energy back into the grid (e.g., solar power inverters, bi-directional chargers and dischargers), and other distributed power generation equipment. Distributed power generation equipment, if the output power is detected as "negative (-)" power while outputting voltage, the 61800 will activate the energy recovery mechanism to convert the reverse current/negative power energy generated by the inverter to the AC power grid. Unlike general AC power supplies that cannot withstand the rechargeable energy of the object to be measured, the 61800 series can be applied to the full four quadrants of positive and negative voltages/currents in the positive and negative directions, and has the energy recovery function, which is sufficient to become a power grid analog power supply.

In addition to decentralized power testing applications, the 61800 Series Recycled Grid Simulators can also be qualified for Smart Grid and Electric Vehicle related testing applications, such as Vehicle-to-Grid (V2G) and Energy Storage System (ESS) testing. 61800 Series Recycled Grid Simulators are not only limited to the RD phase of product development, but can also be used in the QA and production phases of product development. The 61800 series is not limited to the RD stage of product development, but can also be used in the quality verification and production stages.

The 61800 series utilizes full digital control technology to provide maximum power at a maximum phase voltage of 300V and a frequency range of 30Hz to 100Hz. In addition to pure AC voltage output, AC+DC output mode is also available to extend the application to test DC bias components. In addition, it can provide two times the peak continuous maximum output of the root-mean-square current, which is suitable for inrush current testing of the input of the object to be tested.

In addition to outputting smooth voltage and frequency, the 61800 Series offers powerful editing modes (STEP/PULSE/LIST) to simulate a wide range of power grid anomalies and disturbances to meet test requirements.The STEP and PULSE modes provide for single-step or continuous voltage variations. This function is often used to simulate power disturbances such as cyclic dips, instantaneous high voltage, and voltage dips. Users can use the LIST mode to edit more complex test waveforms, including 100 sequences with programmable start and end states, and waveform components that can include AC and DC, to create almost any desired signal waveform. Using these modes, the 61800 series can simulate a wide variety of voltage dips, interruptions and variations, and at the same time be used for regulatory immunity testing in accordance with IEC 61000-4-11 (pre-certification testing) and -4-13/ -4-14/ -4-28.

Users can apply the SYNTHESIS function to set the 40th order harmonic components to form a periodic distorted waveform using 50Hz or 60Hz as the fundamental frequency. In addition, the INTERHAR function is provided, which is used to set another non-harmonic variable frequency component in addition to the fundamental frequency, and can be scanned from 0.01Hz to 2400Hz, which can help to find the resonance point of the input of the object to be measured or the vulnerability of the anti-jamming point.

The 61800 series provides a front panel LCD display and a keyboard, allowing users to easily operate the instrument manually, or through the standard interface GPIB, RS-232, USB, and Ethernet interfaces for digital control of computers, Chroma also provides the instrument's control driver, which can be used with Labview software for control system program integration.

The 61800 Series Recovery Grid Analog Power Supplies provide the harmonic distortion voltage and frequency conditions required for microgrid testing to match the characteristics of the analog grid. Most importantly, the 61800's energy recovery feature allows the power generated by the object under test to be fed back into the AC grid at a high efficiency to meet microgrid testing requirements. 61800 series products include isolation of the input to the AC grid, so there is no need for additional isolation on the object under test side of the analog microgrid.

The 61800 Series Recycled Grid Simulation Power Supplies are compliant with regulatory tests (e.g., IEEE 1547 / IEC 61000-3-15 / IEC 62116) for grid-connected decentralized power generation equipment, with the following main test items:

• Grid Voltage Abnormality Test
• Frequency Abnormality Test for Power Grids
• Anti-islanding Test
• Low Voltage Ride Through Test
• Immunity Test Voltage Variation Immunity Test (IEC 61000-4-11/-4-34)
• Limit Test Limit Test for Current Harmonics and Flicker (IEC 61000-3-2/-3-3)

The energy recovery function of the 61800 series provides an effective solution to save energy. For example, the energy generated by the solar inverter under test can be efficiently fed back to the power grid through the 61800, thus eliminating the need for additional power-consuming resistors. (see figure below)

When abnormal grid voltage conditions occur (e.g. voltage dips), the grid-connected PV Inverter must maintain a normal output for a period of time, which depends on the degree of voltage dips (e.g., according to the BDEW standard, when the voltage dips to 15% of the normal voltage, the grid-connected PV Inverter must maintain a normal output for 150ms), and PV inverters that comply with the LVRT function must not only maintain a period of normal output, but also generate the corresponding invalid power according to the degree of voltage dips. In addition to maintaining a normal output for a certain period of time, a grid-connected inverter must also generate a corresponding amount of ineffective power according to the degree of voltage dips.

The 61800 series recycled grid simulation power supply is fully compliant with LVRT test requirements. Users can use the LIST mode in the waveform editing function to establish LVRT (Low Voltage Ride-Through) test conditions, and the 61800 series' voltage output change response speed is fully compliant with the LVRT test requirements. Meanwhile, in order to understand the impact of harmonic voltage on the TRD (Total Rated Distortion) of the PV inverter output current, the harmonic synthesis function of the 61800 series can simulate different harmonic grid voltages to meet this test requirement. In addition, the output frequency resolution of 61800 series is 0.01Hz, which meets BDEW's requirement of frequency resolution.

The 61800 Series Recycled Grid Simulation Power Supplies can be paired with the 8000 Test System and the A800067 RLC Load to meet IEEE 1547/ IEC 62116 requirements for anti-islanding effect testing.

The Chroma 61800 series recycled grid analog power supplies support external input analog signals, allowing users to input AC and DC waveforms from any signal generator and amplify the signal, which can be used with real-time digital simulators for HIL (Hardware In Loop) simulations as well as reproducing the real power waveforms that occur in the field. The delay time from external analog input to actual voltage output is approximately 100μs.

The 61800 series can be connected in Master-Slave output mode to meet the needs of higher output power applications, please refer to the following list for the parallel combination of each 61800 series model.

classifier for sums of money^*161830/61845/61860 models can be mixed and matched to support parallel connection function
(Maximum number of parallel units is 5).
classifier for sums of money^*2: The maximum number of parallel units of 61800-100 is 8.
classifier for sums of money^*3: 61800-100 (800VLN) Maximum number of parallel units is 3.