PRO20 Series
Regenerative Four-Quadrant
AC Source-Load System
Modular Scalable 4-Quadrant AC Power Supply with Flexible Deployment Options
PRO20 is a four-quadrant regenerative AC programmable power supply with source-load integrated functionality, and structurally featured by power-module-based cabinet construction with flexible deployment and set-up options. PRO20 AC integrates RLC/PQ load emulation, along with various AC anomalies reproduction capabilities including harmonics/inter-harmonics injection, waveform generation, and grid-emulation for EVSE, UPS, PV inverter and PCS testing, from component-level to high-power front-end converters.
The power-module-constructed cabinet structure allows users to scale from 50kVA towards a maximum power rating of 6MVA, with master-slave parallel options feasible by stacking modules within cabinet as well as parallel connection between cabinets. The regenerative source capability of PRO20 AC Power Supply feeds the energy absorbed during load mode back to utility with an efficiency rate of 94% for saving energy cost during testing.
Highlighted Features- Compact footprint and high power density of 256kVA/m3
- Scalable design and architecture at both modular and cabinet level
- Building block with 50kVA and 100kVA modules
- Maximum 8 sets of cabinet in parallel connection for reaching 6MVA
- Ultimate precision of ±(0.1%+0.1%F.S.)@15~200Hz, fast response of 1.5V/μs
- Comprehensive load emulation capability supporting CC, CP, CR, RLC and PQ modes
- Non-linear load emulation capability for harmonics and inter-harmonics injection
- Comprehensive grid emulation capability with powerful waveform recipe and programming flexibility
Model Options
Find the right specification for your requirements
| Model | Power (kVA) | Voltage Range (V) | Max. Current (A) | Dimension (mm) | Weight (kg) |
|---|---|---|---|---|---|
| PRO20-A10-4702 | ±100 | DC 0.001–200.0 | ±200 | 800x1000x1950 | 490 |
| PRO20-A20-4704 | ±200 | DC 0.001–200.0 | ±400 | 800x1000x1950 | 640 |
| PRO20-A30-4706 | ±300 | DC 0.001–200.0 | ±600 | 800x1000x1950 | 790 |
| PRO20-A40-4708 | ±400 | DC 0.001–200.0 | ±800 | 800x1000x1950 | 940 |
| PRO20-A50-4710 | ±500 | DC 0.001–200.0 | ±1000 | 1400x1000x1950 | 1370 |
| PRO20-60-4712 | ±600 | DC 0.001–200.0 | ±1200 | 1400x1000x1950 | 1520 |
| PRO20-A70-4714 | ±700 | DC 0.001–200.0 | ±1400 | 1400x1000x1950 | 1670 |
| PRO20-A75-4715 | ±750 | DC 0.001–200.0 | ±1500 | 1400x1000x1950 | 1745 |
| PRO20-A10-9001 | ±100 | DC 0.001–200.0 | ±100 | 800x1000x1950 | 600 |
| PRO20-A20-9002 | ±200 | DC 0.001–200.0 | ±200 | 800x1000x1950 | 800 |
| PRO20-A30-9003 | ±300 | DC 0.001–200.0 | ±300 | 800x1000x1950 | 1310 |
| PRO20-A40-9004 | ±400 | DC 0.001–200.0 | ±400 | 800x1000x1950 | 1510 |
| PRO20-A50-9005 | ±500 | DC 0.001–200.0 | ±500 | 400x1000x1950 | 1710 |
| PRO20-A60-9006 | ±600 | DC 0.001–200.0 | ±600 | 1400x1000x1950 | 2220 |
| PRO20-A70-9007 | ±700 | DC 0.001–200.0 | ±700 | 1400x1000x1950 | 2420 |
Highlighted Features
The PRO20 Regenerative AC supply features compact footprint with high power density, functionally with system redundancy and scalability at both modular and rack level, with improved performance ratings including voltage output, response, dynamics, accuracy, and precision.
Four-Quadrant Source-Load Integrated AC Power Testing System
PRO20 integrates programmable AC source and electronic load into a single platform with four-quadrant and bidirectional operation capability, further with regenerative load technology for end-to-end testing application and use cases. The system feeds the current back to grid during load mode with a regenerative efficiency of up to 91.5% to save energy cost with your power testing.
PRO20 supports full-power capability across positive and negative voltage/current regions to match the testing of bidirectional AC/DC converters, regenerative loads, inverters and equipment operating under reverse power-flow conditions.
| Quadrant | Voltage \(V\) | Current \(I\) | Power \(P = V I\) | Interpretation |
|---|---|---|---|---|
| I | \(+\) | \(+\) | \(+\) | Forward Source (conventional supply) |
| II | \(-\) | \(+\) | \(-\) | Sink (reverse voltage, absorbing current) |
| III | \(-\) | \(-\) | \(+\) | Reverse Source (supplying with reversed polarity) |
| IV | \(+\) | \(-\) | \(-\) | Sink (positive voltage, regenerative current) |
Non-Linear & RLC Load Network Emulation for IEC 62116 Islanding Test and Off-Grid Tests
Apart from the standard load operation modes of CC, CV, CR, and PQ mode, the built-in RLC network within PRO20 reproduces resistive, inductive and capacitive loads with additional features of user-defined balanced and unbalanced linear load conditions. Performing islanding test as per IEC 62116 with PRO20 is streamlined without the essentialness of implementing RLC load banks. The functioning applies as well for the test against off-grid loads including V2L, V2H, UPS, PCS and micro-grid-related validations.IEC 61000, IEEE 1547, etc.
AC, DC, AC+DC and DC+AC Output Modes
PRO20 functions beyond a simple AC programmable source. Test engineers can simulate pure AC source, or configure independently DC output, further with options of setting AC waveforms with DC offsets or vice versa of superimposing DC output with AC ripples for testing complex converters, OBC, UPS and power modules.
Available operation models:- AC output
- DC output
- AC+DC offset
- DC+AC ripple/superimposed waveform
Built-in Waveform Recipes and User-Defined Waveform Generation
Standard programming capability of PRO20 allows users to define and generate arbitrarily waveforms up to 100th order under modes of List, Wave, Step, Pulse and Advanced programming.
Engineering team of ActionPower can set up pre-compliance testing sequence automation within PRO20 AC's software for facilitating your testing applications. The built-in sequence automation is custom and requested as per each project so that users can access recipe based testing applications and waveforms for quick and simple testing scenario setup. Some standards including:
- IEC 61000-4-11: Voltage interruption at 90° phase angle, Class 2, 50 Hz
- IEC 61000-4-13: Non-triplen odd harmonics injection, Class 3, 50 Hz
- IEC 61000-4-14: Voltage fluctuation of +20% / –30% with 0.2 s interval, Class 3, 50 Hz
- IEC 61000-4-29: DC power supply interruption
- IEC 61000-4-28: Power frequency variations, Class 4
- IEC 61000-4-27: Voltage unbalance test, Class 3
- IEC 61000-4-17: DC ripple voltage test, Class 3
High-Dynamic Waveform and Disturbances Simulation
PRO20 is designed for high-dynamic AC output, with voltage slew rate up to 1.5 V/us in selected configurations to reproduce rapid transients and steep voltage transitions with high fidelity. For a typical voltage sag use case, PRO20 achieves 90% down to 10% of nominal within just 100 µs. The waveform and disturbances emulation capability is functionally backed by PRO20's excellence in accuracy and precision, with ±0.05% @ F.S. voltage accuracy, frequence accuracy of 0.01% and capability of reproducing harmonics Harmonics up to 100th order at 40-70 Hz.
The high dynamic and fast response testing capability matches use cases of low-voltage ride-through (LVRT) validation, inverter transient response characterization, and compliance with standards like IEC 61000-4-11 for voltage dip and interruption immunity.
Scalable Architecture Based on Power-Module with Further Inter-Cabinet Parallel Options for MVA High Power Density etup
PRO20 AC is available at two voltage platform options of 470V and 900V, correspondingly scales up from 50kVA and 100kVA as the most fundamental power with modular power blocks. While a single cabinet is scalable with itself by stacking power modules, the system allows inter-cabinet master-slave connection to reach 6MVA maximum power for high-power converter testing applications. Further for utility-scale high-power testing applications, check TITAN High-Power Grid Simulator up to 10MVA.
| Stage / Use Case | Cabinet Rating & Type | No. of Cabinets | Total Power (kVA) | Row Width (m) | Depth (m) | Equipment Footprint (m²) | Area Power Density (kVA/m²) | Notes |
|---|---|---|---|---|---|---|---|---|
| Initial pilot platform | 1 × 750 kVA high‑power cabinet | 1 | 750 | 1.4 | 1.0 | 1.4 | ≈ 536 | Single cabinet, model PRO20‑A75‑4715. |
| 1.5 MVA mid‑size platform | 2 × 750 kVA cabinets in parallel | 2 | 1500 | 2.8 | 1.0 | 2.8 | ≈ 536 | Two cabinets paralleled for medium‑power grid code testing. |
| 3.0 MVA large platform | 4 × 750 kVA cabinets | 4 | 3000 | 5.6 | 1.0 | 5.6 | ≈ 536 | Covers most 3 MW grid code test scenarios. |
| 4.5 MVA extended platform | 6 × 750 kVA cabinets | 6 | 4500 | 8.4 | 1.0 | 8.4 | ≈ 536 | Adding two more cabinets upgrades from 3.0 to 4.5 MVA. |
| 6.0 MVA full platform | 8 × 750 kVA cabinets (max parallel) | 8 | 6000 | 11.2 | 1.0 | 11.2 | ≈ 536 | Uses the 8‑cabinet parallel limit to form a single 6 MVA test platform. |
Applications of Regenerative Four-Quadrant AC Source-Load System
NEW ENERGY VEHICLE
NEW ENERGY VEHICLE
The PRO20 AC power source enables simulation of grid conditions for on-board chargers (OBC), EVSE, and charging interoperability, including voltage sags, frequency variations, and harmonic injection for compliance testing
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SOLAR ENERGY
SOLAR ENERGY
The PRO20 AC test power supply supports PV inverter testing by reproducing grid disturbances, validating MPPT performance under dynamic voltage/frequency variations, and meeting IEC/EN compliance requirements
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ENERGY STORAGE SYSTEM
ENERGY STORAGE SYSTEM
The PRO20 provides AC grid simulation for PCS and energy storage converters, enabling LVRT/HVRT testing, harmonic compliance validation, and evaluation under weak grid conditions
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Specifications
The following specifications are subject to modifications and changes without notification in advance. All specifications measured are at product's maximum ratings, if not otherwise noted.
GENERAL SPECIFICATIONS
| Output Modes | AC, DC, AC+DC, DC+AC |
|---|---|
| Operation Modes | Bidirectional & Regenerative |
| Output Phase Options | 3-Phase, Split-Phase, Single-Phase |
RLC LOAD
| RESISTANCE | |
|---|---|
| Range (Ω) | 0.001 – 1000 |
| Setting Resolution (Ω) | 0.001 |
| Accuracy | ±0.1% F.S. |
| INDUCTANCE | |
|---|---|
| Range (mH) | 1 – 5000 |
| Setting Resolution (mH) | 0.001 |
| Accuracy | ±0.1% F.S. |
| CAPACITANCE | |
|---|---|
| Range (µF) | 1 – 5000 |
| Setting Resolution (µF) | 0.001 |
| Accuracy | ±0.1% F.S. |
| CREST FACTOR | |
|---|---|
| Range | 1.000 – 5.000 |
| Resolution | 0.001 |
| POWER FACTOR | |
|---|---|
| Range | 1.000 – 1.000 |
| Resolution | 0.001 |
DC OUTPUT
| VOLTAGE | |
|---|---|
| Setting Resolution (V) | 0.01V |
| Output Accuracy | ±(0.01% + 0.05% F.S.) |
| Output Ripple (V_rms) |
|
| Load Regulation | ±0.05% F.S. |
| Line Regulation | ±0.01% F.S. @ 10% variation |
| Output Slew Rate |
|
| CURRENT | |
|---|---|
| SETTING RESOLUTION | 0.01 |
| ACCURACY | ±(0.1% + 0.1% F.S.) |
MEASUREMENT PARAMETERS
| Voltage Accuracy | ±(0.05% + 0.05% F.S.) |
|---|---|
| Current Accuracy | ±(0.1% + 0.2% F.S.) |
| Active Power Accuracy | ±0.5% F.S. |
| Apparent Power Accuracy | ±0.5% F.S. |
INPUT
| Connection Method | Three-phase four-wire ABC + PE |
|---|---|
| Frequency (Hz) | 47 – 63 |
| Voltage Range (V) | 304 – 456 |
| Power Factor | ≥ 0.99 @ rated power |
| Efficiency | ≥ 94% |
MISCELLANEOUS
| Communication Interface | USB, LAN, RS485 (optional) |
|---|---|
| Multi-function Interface | "Anyport", details defined in user manual |
| Operating Temperature | -10°C to +50°C |
| Altitude | ≤ 2000 m |
| Relative Humidity | 10% to 80% RH |
| Protection Functions | Input overvoltage/undervoltage/overfrequency/underfrequency/phase loss protection; Output overvoltage/overcurrent/ overpower protection; Internal overtemperature protection |
| Control & Display | Local touch screen operation, remote PC control; displays voltage, current, frequency, power |
| Cooling Method | Forced air cooling |
| Insulation (Negative–PE) | 3400 VDC |
| Insulation (Positive–PE) | 3400 VDC |
| Insulation (Input–PE) | 3100 VDC |
AC OUTPUT
| VOLTAGE | |
|---|---|
| Setting Resolution | 0.01 V |
| Accuracy | ±(0.05% + 0.05% F.S.) |
| Waveform Types | Sine, Triangle, Pulse, Clipped Wave, Half-Wave, Multi-Pulse, 30 DST Groups, Custom Waveform |
| DC Component (mV) | ＜ 50 mV (DC component) |
| Voltage Distortion |
|
| Load Regulation | ±0.05% F.S. (Line Regulation) |
| Line Regulation | ±0.05% F.S. @ 10% variation |
| Remote Sense | Adaptive (Remote Sense) |
| Voltage Slew Rate |
|
| Three-Phase Unbalance | Not exceeding 1/2 of the GB/T15543-2008 requirement (Negative-sequence voltage ≤1%, short-term ≤2%) |
| FREQUENCY | |
|---|---|
| Range (Hz) | DC, 0.001–200.0 |
| Setting Resolution (Hz) | 0.001 |
| Accuracy | 0.01% |
| PHASE | |
|---|---|
| Range | A = 0°, B = 240°, C = 120° (default); Programmable range 0°–359.9°, three phases independently adjustable |
| Accuracy | ±0.1° @ 15–70 Hz; ±0.5° @ 70–200 Hz |
| Setting Resolution | ±0.1° @ 15–70 Hz; ±0.5° @ 70–200 Hz |
| HARMONICS | |
|---|---|
| Orders | Up to 100 orders @ 40–70 Hz, 25 orders @ 70–200 Hz |
| Content | Maximum 40% per order, total content up to 40% |
| Phase Angle Range | 0°–359.9° |
| Amplitude Error | ±5% or 0.1% of the fundamental value |
| Preview Function | Preview of waveform with harmonic superposition |
| Edit Mode | Import, Export, Read, Store |
| CURRENT | |
|---|---|
| Impulse RMS (A_rms) | 1.1 times rated for continuous operation, 1.2 times rated for up to 20 s |
| Setting Resolution (A) | 0.01 |
| Crest Factor | 1–6 |
| Accuracy | 0.1% + 0.1% F.S. @ 15–200 Hz |
| PROGRAMMING | |
|---|---|
| Programming Modes | List, Wave, Step, Pulse, Advanced, Harmonic, Interharmonic |
| Minimum Programming Time Step | 100 μs |
| Number of Steps | 100 steps |
| Trigger Source | Local software, external hardware |
| Loop Count | 0–9,999,999 |
| Parameters per Step | Voltage, Frequency, Phase, Ramp Time, Dwell Time, Trigger Phase Angle, Trigger Pulse Output |
| Ramp Time Range | 100 μs – 999 s |
| Dwell Time Range | 100 μs – 999 s |
| Trigger Output & Enable | One isolated low-voltage trigger signal, synchronized with power output parameter changes; supports single step, single cycle, single pulse triggering |
| Edit Mode | Import, Export, Store, Read |
| Run Mode | Run, Stop, Large loop (9,999,999) + Nested small loop (9,999,999) |
| Trigger Mode | Automatic, Manual, External |
| FREQUENCY MODULATION | |
|---|---|
| Source Mode | Supported Modes |
| Programming Steps | 100 steps |
| Programming Parameters | Modulation Amplitude, Modulation Frequency, Dwell Time, Trigger Phase Angle |
| Programming Mode | Import, Export, Store, Read |
| Trigger Source | Local Software, External Hardware |
| Trigger Mode | Automatic, Single Step |
| AMPLITUDE MODULATION | |
|---|---|
| Supported Modes | Source Mode |
| Programming Steps | 100 steps |
| Programming Parameters | Modulation Amplitude, Modulation Frequency, Dwell Time, Trigger Phase Angle |
| Programming Mode | Import, Export, Store, Read |
| Trigger Source | Local Software, External Hardware |
| Trigger Mode | Automatic, Single Step |
| Control Method | Percentage, Absolute Value |
| INTERNAL-RESISTANCE MODE | |
|---|---|
| R Range (Ω) | 0–10 (under steady-state output impedance) |
| L Range (mH) | 0–2 |
| Setting Resolution | 0.001 |
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