With the widespread application of Power Hardware-in-the-Loop (PHIL) technology in areas such as renewable energy generation (e.g., wind power converter testing), high-end equipment (airborne power supply emulation), and electric vehicles (motor controller verification), the performance requirements for power amplifiers are becoming increasingly stringent. Although traditional linear power amplifiers offer low harmonic distortion, they suffer from limitations such as low power levels, high cost (3–5 times the price of switching-type amplifiers at the same power rating), and limited power density, making it difficult to meet the demands of high-power PHIL testing.

The KL5000 is a self-developed four-quadrant, high-precision switching-type power amplifier by KeLiang Information. It features high dynamics, wide bandwidth, low latency, high output voltage, and easy scalability. It can operate in voltage source mode or current source mode and is suitable for PHIL simulation testing and power supply characteristic testing in the range of 60 kVA to 480 kVA, providing an ideal interface verification platform for power-level semi-physical simulation testing.

• Supports four-quadrant operation with bidirectional energy flow

• Supports voltage source mode and current source mode

• Supports three-phase independent output with electrical isolation

• Flexible expansion: supports multi-phase paralleling and multi-unit paralleling

• Multi-level protection: short circuit, overcurrent, overvoltage, overtemperature

• High output voltage: up to ±750 VDC

• Voltage slew rate: up to 12 V/μs

• Large-signal bandwidth: up to 5 kHz

  
  

Basic Applications
Power Hardware-in-the-Loop (PHIL) testing, power supply characteristic testing, arbitrary waveform generation, power load emulation

Specific Application Scenarios
Wind power system simulation testing, photovoltaic grid-connected system simulation testing, energy storage power station system simulation testing, power supply characteristic simulation testing; grid simulator, AC/DC source/load emulation, harmonic injection generator, flexible DC transmission system simulation testing

1.Renewable Energy PHIL Testing

The renewable energy power system model runs on a real-time simulator. Through a high-precision four-quadrant power amplifier, it is power-connected to devices such as wind power converters, energy storage converters, and photovoltaic inverters, enabling simulation testing of grid-connected dynamic characteristics and grid-connected operation states of these devices. This assists in optimizing and upgrading the control algorithms of wind power converters, energy storage converters, and photovoltaic inverters, thereby accelerating device development efficiency.

2.Power Supply Characteristic Testing

• KeLiang provides an airborne computer sub-area power supply verification environment. The main functions of the system are as follows:

• It can emulate different power supply types, including DC 28 V, DC 270 V, AC 115 V constant frequency, AC 115 V variable frequency, AC 230 V constant frequency, and AC 230 V variable frequency, among various power supply states.

• The power supply characteristic integrated test software QuikATS controls the emulated airborne computer power supply, capable of simulating normal operation, power conversion, power faults, and other abnormal operating states that may occur under various power supply conditions.

• The QuikATS software meets the requirements of standards such as HB20326-2016 and RTCA-DO160G for aircraft power supply characteristic testing.

• QuikATS enables user-defined programming of different waveforms through the test interface, allowing single-step, continuous, or repeated output of specified waveforms.