Development of a Three Phase Regenerative Programmable Electronic AC Load with Harmonic Load Emulation Capability

Document Type : Research Article

Authors

Electrical Engineering Department, Sharif University of Technology, Tehran, Iran

Abstract

In this paper, the development of a three-phase AC regenerative programmable electronic load is presented. The AC load consists of two parts, a three-phase AC to DC current-controlled PWM converter as the programmable electronic load and a DC to AC grid-connected PWM voltage source inverter as the regeneration system. DC to AC converter can receive current in constant current, constant power, and constant impedance modes to emulate various types of load profiles. In the constant current mode, the system can emulate current harmonics with programmed amplitude and phase to emulate nonlinear load profiles. Due to the harmonic current control capability, proportional-resonant current controller with harmonic controllers is used in AC to DC converter. On the other-side, the DC to AC converter regulates the DC-link voltage and regenerates the power received by electronic load by injecting it to the grid. To increase the robustness of the DC-link voltage control system against power oscillations caused by electronic load in constant current mode with harmonic current, the DC-link voltage controller is modified with adding a multi frequency notch filter and its performance is verified. Simulation and experimental results verify the performance of the proposed electronic load and its control system.

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Articles in Press, Accepted Manuscript
Available Online from 26 February 2025
  • Receive Date: 03 July 2024
  • Revise Date: 23 October 2024
  • Accept Date: 23 February 2025