Power Hardware-in-the-Loop (PHIL) technology combines the advantages of real-time digital simulation and physical emulation. With its extensive application in testing across energy and power systems, aerospace, rail transit, integrated power ships, new energy vehicles, and other fields, the benefits of PHIL are becoming increasingly evident. To ensure the accuracy and stability of PHIL, its core equipment—the power amplifier—must feature high bandwidth, fast response, low latency, low noise, and other technical characteristics. Currently, linear power amplifiers are predominantly used in such applications; however, they are expensive, offer limited power levels, exhibit low system efficiency, and cannot feed absorbed energy back to the grid, which restricts the PHIL testing requirements of power equipment.

Leveraging its years of technical experience in PHIL, KeLiang Tech has selected the UHPS series (Ultra High Bandwidth PHIL System) from EGSTON Power GmbH in Austria—an ultra-wide bandwidth, high-precision, four-quadrant switching power amplifier—as the power interface for high-power PHIL simulation and testing applications. This series features ultra-wide bandwidth, high dynamic response, low latency, and can operate in voltagesource or currentsource modes, making it an ideal interface unit for PHIL.

The UHPS can operate in singlephase AC mode, DC mode, and various userdefined HILbased modes. By using three synchronized UHPS units, threephase AC output can be achieved. The UHPS seamlessly transitions between sourcing and sinking power; in sinking mode, energy is fed directly back to the grid.

Around the UHPS, EGSTON Power provides associated software and hardware functional modules to meet diverse user application requirements.

ECC-UHPS

ECC-UHPS是EGSTON Power公司开发的专有软件，用于控制、监视和配置单台或多台UHPS机组。ECCUHPS is proprietary software developed by EGSTON Power for controlling, monitoring, and configuring single or multiple UHPS units.

EGSTON App

The 4QAC application enables the UHPS to generate arbitrary periodic waveforms, with amplitude, frequency, phase, and DC offset adjustable with a minimum update interval of 1 ms. The integrated development environment (Scripter) provided with the application can be used to set up more complex test scenarios, such as LVRT, HVRT, and frequency adaptation.

The 4QDC application supports various DC control modes, such as constant current, constant voltage, or constant power modes; it also supports advanced test scenarios such as internal resistance emulation, PV array emulation, and battery emulation based on IV curves. With Scripter, custom battery impedance tests up to 100 kHz with a frequency resolution of 1 mHz can be implemented.

The Power SCOPE application monitors setpoints and output voltage/current of the system, supporting visualization and storage of up to 32 input channels with a sampling rate of up to 1 MS/s per channel.

EGSTON RT-Processor，RTP

The EGSTON realtime processor executes EGSTON applications (such as 4QAC and 4QDC) on a realtime platform, providing a programmable test framework. The RTP communicates with the UHPS via SFP highspeed optical fiber.

Singlephase DC application

Threephase AC application